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Anne E McCafferty

Anne McCafferty is a Scientist Emeritus (Research Geophysicist) at the Geology, Geophysics, and Geochemistry Science Center.

Science and Products

EON Geosciences Piper Navajo Airplane with Tail Stinger Magnetometer

Geophysical Mapping of Geologic Systems Host to Critical Mineral Deposits, Southern Midcontinent, US

The objective of this project is to use high-resolution state-of-the-art airborne and regional ground geophysical methods to map an underexplored region of the southern Midcontinent that is important to economic and critical mineral deposits.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Geophysical Mapping of Geologic Systems Host to Critical Mineral Deposits, Southern Midcontinent, US

Geophysical Mapping of Geologic Systems Host to Critical Mineral Deposits, Southern Midcontinent, US

The objective of this project is to use high-resolution state-of-the-art airborne and regional ground geophysical methods to map an underexplored region of the southern Midcontinent that is important to economic and critical mineral deposits.
Learn More
St. Francois area geologic map

Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri—From the Ore Deposit Scale to a Global Deposit Model

The project main objectives are to: 1) geologically, characterize the setting and origin of the iron-copper-cobalt-gold-rare earth element deposits, and advance the knowledge of rare earth element and Co potential within iron oxide-copper-gold (IOCG) deposits of southeast Missouri, and 2) geophysically delineate and characterize the subsurface Precambrian geology using existing ground and new...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri—From the Ore Deposit Scale to a Global Deposit Model

Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri—From the Ore Deposit Scale to a Global Deposit Model

The project main objectives are to: 1) geologically, characterize the setting and origin of the iron-copper-cobalt-gold-rare earth element deposits, and advance the knowledge of rare earth element and Co potential within iron oxide-copper-gold (IOCG) deposits of southeast Missouri, and 2) geophysically delineate and characterize the subsurface Precambrian geology using existing ground and new...
Learn More
Image shows a map of the Mid-Continent of the United States

Continental Scale Geophysics — Integrated Approaches to Delineate Prospective Environments for Critical Metals

Regional geophysical data that are available over continental scales such as magnetic, gravity, and magnetotelluric data can provide a foundation towards identifying and understanding the footprints and deep plumbing systems underlying these important ore systems. Our project will use continental-scale geophysical data to map the locations of deep crustal and mantle structures that may act as...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Continental Scale Geophysics — Integrated Approaches to Delineate Prospective Environments for Critical Metals

Continental Scale Geophysics — Integrated Approaches to Delineate Prospective Environments for Critical Metals

Regional geophysical data that are available over continental scales such as magnetic, gravity, and magnetotelluric data can provide a foundation towards identifying and understanding the footprints and deep plumbing systems underlying these important ore systems. Our project will use continental-scale geophysical data to map the locations of deep crustal and mantle structures that may act as...
Learn More
study location map

Airborne Geophysics for Rare Earth Element Deposits (AGREED)

The USGS Airborne Geophysics for Rare Earth Element Deposits (AGREED) project coordinated with industry to use high resolution airborne geophysical data collected over some of the advanced rare earth element (REE) projects in the U.S. These data were analyzed, interpreted and modeled to generate an improved understanding of the geologic setting, framework, and ore genesis for REE deposits. In...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Airborne Geophysics for Rare Earth Element Deposits (AGREED)

Airborne Geophysics for Rare Earth Element Deposits (AGREED)

The USGS Airborne Geophysics for Rare Earth Element Deposits (AGREED) project coordinated with industry to use high resolution airborne geophysical data collected over some of the advanced rare earth element (REE) projects in the U.S. These data were analyzed, interpreted and modeled to generate an improved understanding of the geologic setting, framework, and ore genesis for REE deposits. In...
Learn More
Filter Total Items: 14

Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025) Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025)

This data release contains digital radiometric flight line data for a high-resolution airborne magnetic and radiometric survey over southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025). Data and documentation for the original version, including associated airborne magnetic data, can be found at https://doi.org/10.5066/P9R05B0M. The airborne...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Airborne magnetic and radiometric survey, central Arkansas and southern Missouri, 2023 Airborne magnetic and radiometric survey, central Arkansas and southern Missouri, 2023

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over part of central Arkansas and southern Missouri. The airborne geophysical survey was funded by the Earth Mapping Resources Initiative and was designed to meet the complimentary needs related to geologic mapping and mineral resource research. The survey covers an irregularly shaped...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Geochemical, petrophysical, and drill hole database for Mesoproterozoic igneous rocks and iron ore deposits of the St. Francois Mountains, southeast Missouri Geochemical, petrophysical, and drill hole database for Mesoproterozoic igneous rocks and iron ore deposits of the St. Francois Mountains, southeast Missouri

Geochemical, petrophysical, and depth to the Paleozoic-Precambrian basement interface from drill hole data for Mesoproterozoic igneous rocks and iron ore deposits of the St. Francois Mountains, southeast Missouri (MMDB) are provided in this data release. The samples were collected as part of various agency programs and projects from 1967 through 2019. Most samples were collected by...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne magnetic and radiometric survey, western Arkansas, 2022 Airborne magnetic and radiometric survey, western Arkansas, 2022

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over part of western Arkansas. The airborne geophysical survey was funded by the USGS National Cooperative Geologic Mapping Program. The survey covers a rectangular area 91.55 by 92.15 kilometers (km) over the transition between the Ouachita Mountains and Ozark Plateau physiographic...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

National-Scale Geophysical, Geologic, and Mineral Resource Data and Grids for the United States, Canada, and Australia: Data in Support of the Tri-National Critical Minerals Mapping Initiative (ver 1.1, March 2025) National-Scale Geophysical, Geologic, and Mineral Resource Data and Grids for the United States, Canada, and Australia: Data in Support of the Tri-National Critical Minerals Mapping Initiative (ver 1.1, March 2025)

National-scale geologic, geophysical, and mineral resource raster and vector data covering the United States, Canada, and Australia are provided in this data release. The data were compiled as part of the tri-national Critical Minerals Mapping Initiative (CMMI). The CMMI, established in 2019, is an international science collaboration between the U.S. Geological Survey (USGS), Geoscience
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne horizontal magnetic gradient and radiometric survey over parts of southeast Missouri, southern Illinois and western Kentucky - The Gap survey, 2021 Airborne horizontal magnetic gradient and radiometric survey over parts of southeast Missouri, southern Illinois and western Kentucky - The Gap survey, 2021

This publication provides digital flight line data for a high-resolution horizontal magnetic gradient and radiometric survey over an area of southeast Missouri, southern Illinois, and western Kentucky. The survey was conducted in collaboration with the Missouri Geological Survey as part of the U.S. Geological Survey (USGS) Earth Mapping Resource Initiative (Earth MRI) effort (Day, 2019)...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Airborne Geophysical Survey Inventory of the Conterminous United States, Alaska, Hawaii, and Puerto Rico (ver. 5.0, April 2024) Airborne Geophysical Survey Inventory of the Conterminous United States, Alaska, Hawaii, and Puerto Rico (ver. 5.0, April 2024)

This data release is a compilation of the locations of airborne geophysical surveys in the United States. The inventory documents public airborne geophysical surveys primarily flown by or contracted by the USGS from 1943 to present. In addition, surveys from the State of Alaska, Department of Natural Resources, Division of Geological and Geophysical Surveys (DGGS): Airborne GeophysWeb...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Airborne magnetic and radiometric survey over northwest Arkansas, 2019-2020 Airborne magnetic and radiometric survey over northwest Arkansas, 2019-2020

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over an area of northwest Arkansas. The airborne geophysical survey was jointly funded by the USGS National Cooperative Geologic Mapping Program and the Earth Mapping Resource Initiative and was designed to meet the complimentary needs related to geologic mapping and mineral resource...
By
National Cooperative Geologic Mapping Program, Geology, Geophysics, and Geochemistry Science Center

Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019 Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019

Note: this data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P14PJFWS. This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over an area of southeast Illinois, western Kentucky, and southern Indiana. The survey includes airborne geophysical data collected as part of the U.S. Geological Survey (USGS...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne magnetic and radiometric survey, southeast Missouri and western Illinois, 2018-2019 Airborne magnetic and radiometric survey, southeast Missouri and western Illinois, 2018-2019

This publication provides digital flight line data for a high-resolution horizontal magnetic gradient and radiometric survey over an area of southeast Missouri and western Illinois. The survey represents the first airborne geophysical survey conducted as part of the U.S. Geological Survey (USGS) Earth Mapping Resource Initiative (Earth MRI) effort (Day, 2019). Earth MRI is a cooperative...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Helicopter magnetic and gravity gradiometry survey over the Pea Ridge iron mine and surrounding area, southeast Missouri, 2014 Helicopter magnetic and gravity gradiometry survey over the Pea Ridge iron mine and surrounding area, southeast Missouri, 2014

High resolution magnetic and gravity gradient data were collected using the HeliFalcon airborne gravity gradiometry system together with a stinger-mounted magnetometer. The survey took place out of the Sullivan, Missouri airport during March of 2014. The survey covers a 35 x 37 square-kilometer area centered on the Pea Ridge iron oxide-apatite rare-earth element deposit, which is located...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models

Regional grid files and 3D voxel models were used to study crustal architecture beneath the Southern Midcontinent (USA) by McCafferty and others (2019). The study covered a rectangular, multi-state area of 924 by 924 kilometers centered on Missouri, and a corresponding volume extending from the topographic surface to a depth of 50 kilometers below sea level. The grid files consist of...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geophysically inferred structural and lithologic map of the precambrian basement in the Joplin 1° x 2° quadrangle, Kansas and Missouri Geophysically inferred structural and lithologic map of the precambrian basement in the Joplin 1° x 2° quadrangle, Kansas and Missouri

This report is an analysis of regional gravity and aeromagnetic data that was carried out as part of a Conterminuous United States Mineral Assessment Program (CUSMAP) study of the Joplin 1° X 2° quadrangle, Kansas and Missouri. It is one in a series of reports representing a cooperative effort between the U.S. Geological Survey, Kansas Geological Survey, and Missouri Department of...

Aeromagnetic maps and terrace-magnetization map centered on the Idaho Batholith and Challis volcanic field, northwestern United States Aeromagnetic maps and terrace-magnetization map centered on the Idaho Batholith and Challis volcanic field, northwestern United States

No abstract available.

Aeromagnetic map of the Hailey and western part of the Idaho Falls 1° x 2° quadrangles, Idaho Aeromagnetic map of the Hailey and western part of the Idaho Falls 1° x 2° quadrangles, Idaho

No abstract available.

Geophysical maps and interpretation of basement terrane in the Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas Geophysical maps and interpretation of basement terrane in the Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas

No abstract available.
A map showing the area of the survey over central Arkansas and and southern Missouri. The coverage area is highlighted in red
Map with overview of minerals survey in central Arkansas and and southern Missouri
Map with overview of minerals survey in central Arkansas and and southern Missouri
A map showing the area of the survey over central Arkansas and and southern Missouri. The coverage area is highlighted in red

Map with overview of minerals survey in central Arkansas and and southern Missouri

Map with overview of minerals survey in central Arkansas and and southern Missouri

An Earth MRI survey to cover central Arkansas and and southern Missouri. The USGS is contracting with Woolpert in collaboration with EON Geosciences who will be conducting the survey to fly over all or parts of 50 counties in central Arkansas and all or parts of 10 counties in southern Misso

By
Communications and Publishing
A map showing the area of the survey over central Arkansas and and southern Missouri. The coverage area is highlighted in red

Map with overview of minerals survey in central Arkansas and and southern Missouri

Map with overview of minerals survey in central Arkansas and and southern Missouri

An Earth MRI survey to cover central Arkansas and and southern Missouri. The USGS is contracting with Woolpert in collaboration with EON Geosciences who will be conducting the survey to fly over all or parts of 50 counties in central Arkansas and all or parts of 10 counties in southern Misso

By
Communications and Publishing
Filter Total Items: 29

Airborne gamma-ray spectrometry inversion signatures of Hicks Dome area Airborne gamma-ray spectrometry inversion signatures of Hicks Dome area

No abstract available.
Authors
Jessica Weihermann, Yaoguo Li, Anne E. McCafferty
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Influence of inherited structure on flexural extension in foreland basin systems: Evidence from the northern Arkoma basin and southern Ozark dome, USA Influence of inherited structure on flexural extension in foreland basin systems: Evidence from the northern Arkoma basin and southern Ozark dome, USA

Extensional faults are key components of foreland basin systems. They form within the upper crust in response to flexure of the lithosphere and accommodate subsidence within the foredeep and forebulge depozones. Such faults are excellent proxies for orogenic system evolution and control the distribution of natural resources and hazards. However, the spatiotemporal evolution of flexural...
Authors
Brandon Michael Lutz, Mark R. Hudson, Tyson Michael Smith, Marieke Dechesne, Leland Robson Spangler, Anne E. McCafferty, Chelsea Morgan Amaral, Neil Patrick Griffis, Jaime Ann Megumi Hirtz
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geosciences and Environmental Change Science Center

National- to continental-scale governmental geophysical efforts for critical mineral mapping, USA National- to continental-scale governmental geophysical efforts for critical mineral mapping, USA

The U.S. Geological Survey (USGS) has established robust collaborations with domestic state and international geological surveys to provide geophysical and other types of earth science data that act to underpin critical mineral research efforts across the United States, Canada, and Australia. The Earth Mapping Resource Initiative (EMRI) is a national-scale collaborative effort with state
Authors
Anne E. McCafferty, Chelsea Morgan Amaral, Garth E. Graham
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Zinc on the edge—Isotopic and geophysical evidence that cratonic edges control world-class shale-hosted zinc-lead deposits Zinc on the edge—Isotopic and geophysical evidence that cratonic edges control world-class shale-hosted zinc-lead deposits

The North Australian Zinc Belt is the largest zinc-lead province in the world, containing three of the ten largest known individual deposits (HYC, Hilton-George Fisher, and Mount Isa). The Northern Cordillera in North America is the second largest zinc-lead province, containing a further two of the world’s top ten deposits (Red Dog and Howards Pass). Despite this world-class endowment...
Authors
David L. Huston, David C. Champion, Karol Czarnota, Jingming Duan, Matthew Hutchens, Suzanne Paradis, Mark Hoggard, Bryant Ware, George M. Gibson, Michael P. Doublier, Karen D. Kelley, Anne E. McCafferty, Nathan Hayward, Fred Richards, Svetlana Tessalina, Graham Carr
By
Geology, Geophysics, and Geochemistry Science Center

Focus areas for data acquisition for potential domestic resources of 13 critical minerals in the conterminous United States and Puerto Rico — Antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadiu Focus areas for data acquisition for potential domestic resources of 13 critical minerals in the conterminous United States and Puerto Rico — Antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadiu

The Earth Mapping Resources Initiative (Earth MRI) is conducted in phases to identify areas for acquiring new geologic framework data to identify potential domestic resources of the 35 mineral materials designated as critical minerals for the United States. This report describes the data sources and summary results for 13 critical minerals evaluated in the conterminous United States and...
Authors
Jane M. Hammarstrom, Connie L. Dicken, Laurel G. Woodruff, Allen K. Andersen, Sean T. Brennan, Warren C. Day, Benjamin J. Drenth, Nora K. Foley, Susan Hall, Albert H. Hofstra, Anne E. McCafferty, Anjana K. Shah, David A. Ponce
By
Geology, Energy, and Minerals Mission Area, Mineral Resources Program, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Earth Mapping Resources Initiative (Earth MRI)

Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials

Demand for critical raw materials is expected to accelerate over the next few decades due to continued population growth and the shifting consumption patterns of the global economy. Sedimentary basins are important sources for critical raw materials and new discoveries of sediment–hosted Mississippi Valley–type (MVT) and/or clastic–dominated (CD) Zn–Pb deposits are likely required to...
Authors
Christopher J. M. Lawley, Anne E. McCafferty, Garth E. Graham, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua Aaron Coyan, Carma A. San Juan, Michael G. Gadd
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Data-driven prospectivity modelling of sediment-hosted mineral systems Data-driven prospectivity modelling of sediment-hosted mineral systems

Mississippi Valley-type (MVT) and clastic-dominated (CD) deposits are important sources for Zn, Pb, Ag, and Cd as well as the critical elements Ga, Ge, In, and Sb. However, mapping the drivers, sources, pathways, and traps of MVT and CD deposits within the much larger and mostly unmineralized sedimentary basins remain some of the least understood aspects of these mineral systems. Herein...
Authors
Christopher J.M. Lawley, Anne E. McCafferty, Garth E. Graham, Michael G. Gadd, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua A. Coyan, Carma A. San Juan
By
Geology, Geophysics, and Geochemistry Science Center

Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, tin, Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, tin,

In response to a need for information on potential domestic sources of critical minerals, the Earth Mapping Resources Initiative (Earth MRI) was established to identify and prioritize areas for acquisition of new geologic mapping, geophysical data, and elevation data to improve our knowledge of the geologic framework of the United States. Phase 1 of Earth MRI concentrated on those...
Authors
Jane M. Hammarstrom, Connie L. Dicken, Warren C. Day, Albert H. Hofstra, Benjamin J. Drenth, Anjana K. Shah, Anne E. McCafferty, Laurel G. Woodruff, Nora K. Foley, David A. Ponce, Thomas P. Frost, Lisa L. Stillings
By
Geology, Energy, and Minerals Mission Area, Mineral Resources Program, Geology, Energy & Minerals Science Center, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Earth Mapping Resources Initiative (Earth MRI)

The US Geological Survey’s Earth Mapping Resources Initiative (Earth MRI)—Providing framework geologic, geophysical, and elevation data to the nation’s critical mineral-bearing regions The US Geological Survey’s Earth Mapping Resources Initiative (Earth MRI)—Providing framework geologic, geophysical, and elevation data to the nation’s critical mineral-bearing regions

New detailed mapping of the geologic resources of the Nation has the potential to significantly close the gap in the essential data needed to fuel a modern era of economic development and technological innovation, while at the same time dramatically enhancing our understanding of the fundamental way geology impacts everyday life, from the domestic critical mineral resources that are...
Authors
Warren C. Day, Benjamin J. Drenth, Anne E. McCafferty, Anjana K. Shah, David A. Ponce, James V. Jones, V. J. Grauch
By
Natural Hazards Mission Area, Alaska Science Center, Geology, Geophysics, and Geochemistry Science Center, Geologic Hazards Science Center

Crustal architecture beneath the southern Midcontinent (USA) and controls on Mesoproterozoic iron-oxide mineralization from 3D geophysical models Crustal architecture beneath the southern Midcontinent (USA) and controls on Mesoproterozoic iron-oxide mineralization from 3D geophysical models

Several types of critical mineral-bearing ore deposits in the southern Midcontinent region of the U.S. are hosted in Mesoproterozoic igneous rocks largely concealed beneath Paleozoic cover. Discerning the architecture of igneous intrusions and volcanic centers in the crust is fundamental to understanding the geologic evolution of this vast region and its mineral resources. To advance the
Authors
Anne E. McCafferty, Jeffrey D. Phillips, Albert H. Hofstra, Warren C. Day
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geochemistry, Nd-Pb Isotopes, and Pb-Pb Ages of the Mesoproterozoic Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Southeast Missouri Geochemistry, Nd-Pb Isotopes, and Pb-Pb Ages of the Mesoproterozoic Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Southeast Missouri

Iron oxide-apatite and iron oxide-copper-gold deposits occur within ~1.48 to 1.47 Ga volcanic rocks of the St. Francois Mountains terrane near a regional boundary separating crustal blocks having contrasting depleted-mantle Sm-Nd model ages (TDM). Major and trace element analyses and Nd and Pb isotope data were obtained to characterize the Pea Ridge deposit, improve identification of...
Authors
Robert A. Ayuso, John F. Slack, Warren C. Day, Anne E. McCafferty
By
Mineral Resources Program, Geology, Energy & Minerals Science Center, Geology, Geophysics, and Geochemistry Science Center

Magnetic and gravity gradiometry framework for Mesoproterozoic iron oxide-apatite and iron oxide-copper-gold deposits, southeast Missouri, USA Magnetic and gravity gradiometry framework for Mesoproterozoic iron oxide-apatite and iron oxide-copper-gold deposits, southeast Missouri, USA

High-resolution airborne magnetic and gravity gradiometry data provide the geophysical framework for evaluating the exploration potential of hidden iron oxide deposits in Mesoproterozoic basement rocks of southeast Missouri. The data are used to calculate mineral prospectivity for iron oxide-apatite (IOA) ± rare earth element (REE) and iron oxide-copper-gold (IOCG) deposits. Results...
Authors
Anne E. McCafferty, Jeffrey Phillips, Rhonda L. Driscoll
By
Mineral Resources Program, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center
Australia, Canada and US Unify Critical Minerals Data

Australia, Canada and US Unify Critical Minerals Data

The U.S. Geological Survey (USGS) has released a compilation of national-scale geological, geophysical and mineral resource datasets from Australia...

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Mineral Science Reaches New Heights

Mineral Science Reaches New Heights

When learning more about ancient rocks buried deep beneath the surface of the Earth, it may seem surprising to use futuristic technologies flown...

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Rich, Attractive, and Extremely Shallow

Rich, Attractive, and Extremely Shallow

No, it’s not a title for a new reality-dating TV show, but it is real science! It also describes the ideal mineral deposit.

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Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral Resources

Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral Resources

A high-resolution airborne survey to study the rocks within the St. Francois Mountains will be conducted by U.S. Geological Survey scientists starting...

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Helicopter Survey to Map Potential Mineral Resources in Southeast Missouri

Helicopter Survey to Map Potential Mineral Resources in Southeast Missouri

U.S. Geological Survey scientists will conduct a comprehensive, high-resolution airborne survey to study the rock layers under parts of Washington...

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Science and Products

EON Geosciences Piper Navajo Airplane with Tail Stinger Magnetometer

Geophysical Mapping of Geologic Systems Host to Critical Mineral Deposits, Southern Midcontinent, US

The objective of this project is to use high-resolution state-of-the-art airborne and regional ground geophysical methods to map an underexplored region of the southern Midcontinent that is important to economic and critical mineral deposits.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Geophysical Mapping of Geologic Systems Host to Critical Mineral Deposits, Southern Midcontinent, US

Geophysical Mapping of Geologic Systems Host to Critical Mineral Deposits, Southern Midcontinent, US

The objective of this project is to use high-resolution state-of-the-art airborne and regional ground geophysical methods to map an underexplored region of the southern Midcontinent that is important to economic and critical mineral deposits.
Learn More
St. Francois area geologic map

Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri—From the Ore Deposit Scale to a Global Deposit Model

The project main objectives are to: 1) geologically, characterize the setting and origin of the iron-copper-cobalt-gold-rare earth element deposits, and advance the knowledge of rare earth element and Co potential within iron oxide-copper-gold (IOCG) deposits of southeast Missouri, and 2) geophysically delineate and characterize the subsurface Precambrian geology using existing ground and new...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri—From the Ore Deposit Scale to a Global Deposit Model

Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri—From the Ore Deposit Scale to a Global Deposit Model

The project main objectives are to: 1) geologically, characterize the setting and origin of the iron-copper-cobalt-gold-rare earth element deposits, and advance the knowledge of rare earth element and Co potential within iron oxide-copper-gold (IOCG) deposits of southeast Missouri, and 2) geophysically delineate and characterize the subsurface Precambrian geology using existing ground and new...
Learn More
Image shows a map of the Mid-Continent of the United States

Continental Scale Geophysics — Integrated Approaches to Delineate Prospective Environments for Critical Metals

Regional geophysical data that are available over continental scales such as magnetic, gravity, and magnetotelluric data can provide a foundation towards identifying and understanding the footprints and deep plumbing systems underlying these important ore systems. Our project will use continental-scale geophysical data to map the locations of deep crustal and mantle structures that may act as...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Continental Scale Geophysics — Integrated Approaches to Delineate Prospective Environments for Critical Metals

Continental Scale Geophysics — Integrated Approaches to Delineate Prospective Environments for Critical Metals

Regional geophysical data that are available over continental scales such as magnetic, gravity, and magnetotelluric data can provide a foundation towards identifying and understanding the footprints and deep plumbing systems underlying these important ore systems. Our project will use continental-scale geophysical data to map the locations of deep crustal and mantle structures that may act as...
Learn More
study location map

Airborne Geophysics for Rare Earth Element Deposits (AGREED)

The USGS Airborne Geophysics for Rare Earth Element Deposits (AGREED) project coordinated with industry to use high resolution airborne geophysical data collected over some of the advanced rare earth element (REE) projects in the U.S. These data were analyzed, interpreted and modeled to generate an improved understanding of the geologic setting, framework, and ore genesis for REE deposits. In...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Airborne Geophysics for Rare Earth Element Deposits (AGREED)

Airborne Geophysics for Rare Earth Element Deposits (AGREED)

The USGS Airborne Geophysics for Rare Earth Element Deposits (AGREED) project coordinated with industry to use high resolution airborne geophysical data collected over some of the advanced rare earth element (REE) projects in the U.S. These data were analyzed, interpreted and modeled to generate an improved understanding of the geologic setting, framework, and ore genesis for REE deposits. In...
Learn More
Filter Total Items: 14

Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025) Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025)

This data release contains digital radiometric flight line data for a high-resolution airborne magnetic and radiometric survey over southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025). Data and documentation for the original version, including associated airborne magnetic data, can be found at https://doi.org/10.5066/P9R05B0M. The airborne...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Airborne magnetic and radiometric survey, central Arkansas and southern Missouri, 2023 Airborne magnetic and radiometric survey, central Arkansas and southern Missouri, 2023

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over part of central Arkansas and southern Missouri. The airborne geophysical survey was funded by the Earth Mapping Resources Initiative and was designed to meet the complimentary needs related to geologic mapping and mineral resource research. The survey covers an irregularly shaped...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Geochemical, petrophysical, and drill hole database for Mesoproterozoic igneous rocks and iron ore deposits of the St. Francois Mountains, southeast Missouri Geochemical, petrophysical, and drill hole database for Mesoproterozoic igneous rocks and iron ore deposits of the St. Francois Mountains, southeast Missouri

Geochemical, petrophysical, and depth to the Paleozoic-Precambrian basement interface from drill hole data for Mesoproterozoic igneous rocks and iron ore deposits of the St. Francois Mountains, southeast Missouri (MMDB) are provided in this data release. The samples were collected as part of various agency programs and projects from 1967 through 2019. Most samples were collected by...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne magnetic and radiometric survey, western Arkansas, 2022 Airborne magnetic and radiometric survey, western Arkansas, 2022

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over part of western Arkansas. The airborne geophysical survey was funded by the USGS National Cooperative Geologic Mapping Program. The survey covers a rectangular area 91.55 by 92.15 kilometers (km) over the transition between the Ouachita Mountains and Ozark Plateau physiographic...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

National-Scale Geophysical, Geologic, and Mineral Resource Data and Grids for the United States, Canada, and Australia: Data in Support of the Tri-National Critical Minerals Mapping Initiative (ver 1.1, March 2025) National-Scale Geophysical, Geologic, and Mineral Resource Data and Grids for the United States, Canada, and Australia: Data in Support of the Tri-National Critical Minerals Mapping Initiative (ver 1.1, March 2025)

National-scale geologic, geophysical, and mineral resource raster and vector data covering the United States, Canada, and Australia are provided in this data release. The data were compiled as part of the tri-national Critical Minerals Mapping Initiative (CMMI). The CMMI, established in 2019, is an international science collaboration between the U.S. Geological Survey (USGS), Geoscience
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne horizontal magnetic gradient and radiometric survey over parts of southeast Missouri, southern Illinois and western Kentucky - The Gap survey, 2021 Airborne horizontal magnetic gradient and radiometric survey over parts of southeast Missouri, southern Illinois and western Kentucky - The Gap survey, 2021

This publication provides digital flight line data for a high-resolution horizontal magnetic gradient and radiometric survey over an area of southeast Missouri, southern Illinois, and western Kentucky. The survey was conducted in collaboration with the Missouri Geological Survey as part of the U.S. Geological Survey (USGS) Earth Mapping Resource Initiative (Earth MRI) effort (Day, 2019)...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Airborne Geophysical Survey Inventory of the Conterminous United States, Alaska, Hawaii, and Puerto Rico (ver. 5.0, April 2024) Airborne Geophysical Survey Inventory of the Conterminous United States, Alaska, Hawaii, and Puerto Rico (ver. 5.0, April 2024)

This data release is a compilation of the locations of airborne geophysical surveys in the United States. The inventory documents public airborne geophysical surveys primarily flown by or contracted by the USGS from 1943 to present. In addition, surveys from the State of Alaska, Department of Natural Resources, Division of Geological and Geophysical Surveys (DGGS): Airborne GeophysWeb...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Airborne magnetic and radiometric survey over northwest Arkansas, 2019-2020 Airborne magnetic and radiometric survey over northwest Arkansas, 2019-2020

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over an area of northwest Arkansas. The airborne geophysical survey was jointly funded by the USGS National Cooperative Geologic Mapping Program and the Earth Mapping Resource Initiative and was designed to meet the complimentary needs related to geologic mapping and mineral resource...
By
National Cooperative Geologic Mapping Program, Geology, Geophysics, and Geochemistry Science Center

Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019 Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019

Note: this data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P14PJFWS. This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over an area of southeast Illinois, western Kentucky, and southern Indiana. The survey includes airborne geophysical data collected as part of the U.S. Geological Survey (USGS...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne magnetic and radiometric survey, southeast Missouri and western Illinois, 2018-2019 Airborne magnetic and radiometric survey, southeast Missouri and western Illinois, 2018-2019

This publication provides digital flight line data for a high-resolution horizontal magnetic gradient and radiometric survey over an area of southeast Missouri and western Illinois. The survey represents the first airborne geophysical survey conducted as part of the U.S. Geological Survey (USGS) Earth Mapping Resource Initiative (Earth MRI) effort (Day, 2019). Earth MRI is a cooperative...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Helicopter magnetic and gravity gradiometry survey over the Pea Ridge iron mine and surrounding area, southeast Missouri, 2014 Helicopter magnetic and gravity gradiometry survey over the Pea Ridge iron mine and surrounding area, southeast Missouri, 2014

High resolution magnetic and gravity gradient data were collected using the HeliFalcon airborne gravity gradiometry system together with a stinger-mounted magnetometer. The survey took place out of the Sullivan, Missouri airport during March of 2014. The survey covers a 35 x 37 square-kilometer area centered on the Pea Ridge iron oxide-apatite rare-earth element deposit, which is located...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models Crustal Architecture Beneath the Southern Midcontinent (USA) -- Data Grids and 3D Geophysical Models

Regional grid files and 3D voxel models were used to study crustal architecture beneath the Southern Midcontinent (USA) by McCafferty and others (2019). The study covered a rectangular, multi-state area of 924 by 924 kilometers centered on Missouri, and a corresponding volume extending from the topographic surface to a depth of 50 kilometers below sea level. The grid files consist of...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geophysically inferred structural and lithologic map of the precambrian basement in the Joplin 1° x 2° quadrangle, Kansas and Missouri Geophysically inferred structural and lithologic map of the precambrian basement in the Joplin 1° x 2° quadrangle, Kansas and Missouri

This report is an analysis of regional gravity and aeromagnetic data that was carried out as part of a Conterminuous United States Mineral Assessment Program (CUSMAP) study of the Joplin 1° X 2° quadrangle, Kansas and Missouri. It is one in a series of reports representing a cooperative effort between the U.S. Geological Survey, Kansas Geological Survey, and Missouri Department of...

Aeromagnetic maps and terrace-magnetization map centered on the Idaho Batholith and Challis volcanic field, northwestern United States Aeromagnetic maps and terrace-magnetization map centered on the Idaho Batholith and Challis volcanic field, northwestern United States

No abstract available.

Aeromagnetic map of the Hailey and western part of the Idaho Falls 1° x 2° quadrangles, Idaho Aeromagnetic map of the Hailey and western part of the Idaho Falls 1° x 2° quadrangles, Idaho

No abstract available.

Geophysical maps and interpretation of basement terrane in the Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas Geophysical maps and interpretation of basement terrane in the Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas

No abstract available.
A map showing the area of the survey over central Arkansas and and southern Missouri. The coverage area is highlighted in red
Map with overview of minerals survey in central Arkansas and and southern Missouri
Map with overview of minerals survey in central Arkansas and and southern Missouri
A map showing the area of the survey over central Arkansas and and southern Missouri. The coverage area is highlighted in red

Map with overview of minerals survey in central Arkansas and and southern Missouri

Map with overview of minerals survey in central Arkansas and and southern Missouri

An Earth MRI survey to cover central Arkansas and and southern Missouri. The USGS is contracting with Woolpert in collaboration with EON Geosciences who will be conducting the survey to fly over all or parts of 50 counties in central Arkansas and all or parts of 10 counties in southern Misso

By
Communications and Publishing
A map showing the area of the survey over central Arkansas and and southern Missouri. The coverage area is highlighted in red

Map with overview of minerals survey in central Arkansas and and southern Missouri

Map with overview of minerals survey in central Arkansas and and southern Missouri

An Earth MRI survey to cover central Arkansas and and southern Missouri. The USGS is contracting with Woolpert in collaboration with EON Geosciences who will be conducting the survey to fly over all or parts of 50 counties in central Arkansas and all or parts of 10 counties in southern Misso

By
Communications and Publishing
Filter Total Items: 29

Airborne gamma-ray spectrometry inversion signatures of Hicks Dome area Airborne gamma-ray spectrometry inversion signatures of Hicks Dome area

No abstract available.
Authors
Jessica Weihermann, Yaoguo Li, Anne E. McCafferty
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Influence of inherited structure on flexural extension in foreland basin systems: Evidence from the northern Arkoma basin and southern Ozark dome, USA Influence of inherited structure on flexural extension in foreland basin systems: Evidence from the northern Arkoma basin and southern Ozark dome, USA

Extensional faults are key components of foreland basin systems. They form within the upper crust in response to flexure of the lithosphere and accommodate subsidence within the foredeep and forebulge depozones. Such faults are excellent proxies for orogenic system evolution and control the distribution of natural resources and hazards. However, the spatiotemporal evolution of flexural...
Authors
Brandon Michael Lutz, Mark R. Hudson, Tyson Michael Smith, Marieke Dechesne, Leland Robson Spangler, Anne E. McCafferty, Chelsea Morgan Amaral, Neil Patrick Griffis, Jaime Ann Megumi Hirtz
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geosciences and Environmental Change Science Center

National- to continental-scale governmental geophysical efforts for critical mineral mapping, USA National- to continental-scale governmental geophysical efforts for critical mineral mapping, USA

The U.S. Geological Survey (USGS) has established robust collaborations with domestic state and international geological surveys to provide geophysical and other types of earth science data that act to underpin critical mineral research efforts across the United States, Canada, and Australia. The Earth Mapping Resource Initiative (EMRI) is a national-scale collaborative effort with state
Authors
Anne E. McCafferty, Chelsea Morgan Amaral, Garth E. Graham
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

Zinc on the edge—Isotopic and geophysical evidence that cratonic edges control world-class shale-hosted zinc-lead deposits Zinc on the edge—Isotopic and geophysical evidence that cratonic edges control world-class shale-hosted zinc-lead deposits

The North Australian Zinc Belt is the largest zinc-lead province in the world, containing three of the ten largest known individual deposits (HYC, Hilton-George Fisher, and Mount Isa). The Northern Cordillera in North America is the second largest zinc-lead province, containing a further two of the world’s top ten deposits (Red Dog and Howards Pass). Despite this world-class endowment...
Authors
David L. Huston, David C. Champion, Karol Czarnota, Jingming Duan, Matthew Hutchens, Suzanne Paradis, Mark Hoggard, Bryant Ware, George M. Gibson, Michael P. Doublier, Karen D. Kelley, Anne E. McCafferty, Nathan Hayward, Fred Richards, Svetlana Tessalina, Graham Carr
By
Geology, Geophysics, and Geochemistry Science Center

Focus areas for data acquisition for potential domestic resources of 13 critical minerals in the conterminous United States and Puerto Rico — Antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadiu Focus areas for data acquisition for potential domestic resources of 13 critical minerals in the conterminous United States and Puerto Rico — Antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadiu

The Earth Mapping Resources Initiative (Earth MRI) is conducted in phases to identify areas for acquiring new geologic framework data to identify potential domestic resources of the 35 mineral materials designated as critical minerals for the United States. This report describes the data sources and summary results for 13 critical minerals evaluated in the conterminous United States and...
Authors
Jane M. Hammarstrom, Connie L. Dicken, Laurel G. Woodruff, Allen K. Andersen, Sean T. Brennan, Warren C. Day, Benjamin J. Drenth, Nora K. Foley, Susan Hall, Albert H. Hofstra, Anne E. McCafferty, Anjana K. Shah, David A. Ponce
By
Geology, Energy, and Minerals Mission Area, Mineral Resources Program, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Earth Mapping Resources Initiative (Earth MRI)

Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials Data-driven prospectivity modelling of sediment-hosted Zn-Pb mineral systems and their critical raw materials

Demand for critical raw materials is expected to accelerate over the next few decades due to continued population growth and the shifting consumption patterns of the global economy. Sedimentary basins are important sources for critical raw materials and new discoveries of sediment–hosted Mississippi Valley–type (MVT) and/or clastic–dominated (CD) Zn–Pb deposits are likely required to...
Authors
Christopher J. M. Lawley, Anne E. McCafferty, Garth E. Graham, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua Aaron Coyan, Carma A. San Juan, Michael G. Gadd
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Data-driven prospectivity modelling of sediment-hosted mineral systems Data-driven prospectivity modelling of sediment-hosted mineral systems

Mississippi Valley-type (MVT) and clastic-dominated (CD) deposits are important sources for Zn, Pb, Ag, and Cd as well as the critical elements Ga, Ge, In, and Sb. However, mapping the drivers, sources, pathways, and traps of MVT and CD deposits within the much larger and mostly unmineralized sedimentary basins remain some of the least understood aspects of these mineral systems. Herein...
Authors
Christopher J.M. Lawley, Anne E. McCafferty, Garth E. Graham, Michael G. Gadd, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua A. Coyan, Carma A. San Juan
By
Geology, Geophysics, and Geochemistry Science Center

Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, tin, Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, tin,

In response to a need for information on potential domestic sources of critical minerals, the Earth Mapping Resources Initiative (Earth MRI) was established to identify and prioritize areas for acquisition of new geologic mapping, geophysical data, and elevation data to improve our knowledge of the geologic framework of the United States. Phase 1 of Earth MRI concentrated on those...
Authors
Jane M. Hammarstrom, Connie L. Dicken, Warren C. Day, Albert H. Hofstra, Benjamin J. Drenth, Anjana K. Shah, Anne E. McCafferty, Laurel G. Woodruff, Nora K. Foley, David A. Ponce, Thomas P. Frost, Lisa L. Stillings
By
Geology, Energy, and Minerals Mission Area, Mineral Resources Program, Geology, Energy & Minerals Science Center, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Earth Mapping Resources Initiative (Earth MRI)

The US Geological Survey’s Earth Mapping Resources Initiative (Earth MRI)—Providing framework geologic, geophysical, and elevation data to the nation’s critical mineral-bearing regions The US Geological Survey’s Earth Mapping Resources Initiative (Earth MRI)—Providing framework geologic, geophysical, and elevation data to the nation’s critical mineral-bearing regions

New detailed mapping of the geologic resources of the Nation has the potential to significantly close the gap in the essential data needed to fuel a modern era of economic development and technological innovation, while at the same time dramatically enhancing our understanding of the fundamental way geology impacts everyday life, from the domestic critical mineral resources that are...
Authors
Warren C. Day, Benjamin J. Drenth, Anne E. McCafferty, Anjana K. Shah, David A. Ponce, James V. Jones, V. J. Grauch
By
Natural Hazards Mission Area, Alaska Science Center, Geology, Geophysics, and Geochemistry Science Center, Geologic Hazards Science Center

Crustal architecture beneath the southern Midcontinent (USA) and controls on Mesoproterozoic iron-oxide mineralization from 3D geophysical models Crustal architecture beneath the southern Midcontinent (USA) and controls on Mesoproterozoic iron-oxide mineralization from 3D geophysical models

Several types of critical mineral-bearing ore deposits in the southern Midcontinent region of the U.S. are hosted in Mesoproterozoic igneous rocks largely concealed beneath Paleozoic cover. Discerning the architecture of igneous intrusions and volcanic centers in the crust is fundamental to understanding the geologic evolution of this vast region and its mineral resources. To advance the
Authors
Anne E. McCafferty, Jeffrey D. Phillips, Albert H. Hofstra, Warren C. Day
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geochemistry, Nd-Pb Isotopes, and Pb-Pb Ages of the Mesoproterozoic Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Southeast Missouri Geochemistry, Nd-Pb Isotopes, and Pb-Pb Ages of the Mesoproterozoic Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Southeast Missouri

Iron oxide-apatite and iron oxide-copper-gold deposits occur within ~1.48 to 1.47 Ga volcanic rocks of the St. Francois Mountains terrane near a regional boundary separating crustal blocks having contrasting depleted-mantle Sm-Nd model ages (TDM). Major and trace element analyses and Nd and Pb isotope data were obtained to characterize the Pea Ridge deposit, improve identification of...
Authors
Robert A. Ayuso, John F. Slack, Warren C. Day, Anne E. McCafferty
By
Mineral Resources Program, Geology, Energy & Minerals Science Center, Geology, Geophysics, and Geochemistry Science Center

Magnetic and gravity gradiometry framework for Mesoproterozoic iron oxide-apatite and iron oxide-copper-gold deposits, southeast Missouri, USA Magnetic and gravity gradiometry framework for Mesoproterozoic iron oxide-apatite and iron oxide-copper-gold deposits, southeast Missouri, USA

High-resolution airborne magnetic and gravity gradiometry data provide the geophysical framework for evaluating the exploration potential of hidden iron oxide deposits in Mesoproterozoic basement rocks of southeast Missouri. The data are used to calculate mineral prospectivity for iron oxide-apatite (IOA) ± rare earth element (REE) and iron oxide-copper-gold (IOCG) deposits. Results...
Authors
Anne E. McCafferty, Jeffrey Phillips, Rhonda L. Driscoll
By
Mineral Resources Program, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center
Australia, Canada and US Unify Critical Minerals Data

Australia, Canada and US Unify Critical Minerals Data

The U.S. Geological Survey (USGS) has released a compilation of national-scale geological, geophysical and mineral resource datasets from Australia...

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Mineral Science Reaches New Heights

Mineral Science Reaches New Heights

When learning more about ancient rocks buried deep beneath the surface of the Earth, it may seem surprising to use futuristic technologies flown...

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Rich, Attractive, and Extremely Shallow

Rich, Attractive, and Extremely Shallow

No, it’s not a title for a new reality-dating TV show, but it is real science! It also describes the ideal mineral deposit.

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Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral Resources

Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral Resources

A high-resolution airborne survey to study the rocks within the St. Francois Mountains will be conducted by U.S. Geological Survey scientists starting...

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Helicopter Survey to Map Potential Mineral Resources in Southeast Missouri

Helicopter Survey to Map Potential Mineral Resources in Southeast Missouri

U.S. Geological Survey scientists will conduct a comprehensive, high-resolution airborne survey to study the rock layers under parts of Washington...

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