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Carol A Finn, Ph.D. (Former Employee)

Science and Products

Image Collage of Landsat, pollinator, and volcanologist

Large Magmatic Systems for Minerals

This project continues work on large magmatic systems in the U.S., where critical mineral commodities important to clean energy technologies can be concentrated. Modeling of large mafic intrusion extents will continue, and new geophysical methods will be applied to improve understanding of magmatic systems.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Large Magmatic Systems for Minerals

Large Magmatic Systems for Minerals

This project continues work on large magmatic systems in the U.S., where critical mineral commodities important to clean energy technologies can be concentrated. Modeling of large mafic intrusion extents will continue, and new geophysical methods will be applied to improve understanding of magmatic systems.
Learn More
Satellite map view of world with four countries highlighted in green.

International Integrated Minerals Interpretation

We will publish reports and interpretive papers on existing data from USGS internal mineral resource assessment collaborative work.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
International Integrated Minerals Interpretation

International Integrated Minerals Interpretation

We will publish reports and interpretive papers on existing data from USGS internal mineral resource assessment collaborative work.
Learn More
Stillwater River canyon with mine

Geophysical Studies on the Architecture of Large Igneous Systems Hosting Magmatic Ore Deposits

Platinum group elements, also known as PGEs, are a group of elements that have specific properties which make them useful for various applications in industry. One geologic setting that contains large concentrations of platinum group elements is layered mafic intrusions. This project will use new and preexisting geophysical datasets to characterize the internal structure of layered intrusions...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Geophysical Studies on the Architecture of Large Igneous Systems Hosting Magmatic Ore Deposits

Geophysical Studies on the Architecture of Large Igneous Systems Hosting Magmatic Ore Deposits

Platinum group elements, also known as PGEs, are a group of elements that have specific properties which make them useful for various applications in industry. One geologic setting that contains large concentrations of platinum group elements is layered mafic intrusions. This project will use new and preexisting geophysical datasets to characterize the internal structure of layered intrusions...
Learn More

Surface geophysical data from Ollalie North springs, west-central Oregon Surface geophysical data from Ollalie North springs, west-central Oregon

Surface electrical resistivity tomography (ERT) data were collected in September of 2018 near Ollalie North springs in the upper McKenzie River watershed of west-central Oregon. ERT data were acquired along a single transect on the north bank of Ollalie Creek using a combination of inverse Schlumberger, dipole-dipole, and Wenner arrays. These data were collected to contribute high...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne Electromagnetic Survey Processed Data and Models Data Release, Yellowstone National Park, Wyoming, 2016 Airborne Electromagnetic Survey Processed Data and Models Data Release, Yellowstone National Park, Wyoming, 2016

Airborne electromagnetic (AEM) and magnetic survey data were collected during November and December 2016 along 4,212 line-kilometers over Yellowstone National Park, Wyoming. The survey was conducted as part of a study of the subsurface geologic structure and geothermal and groundwater resources of Yellowstone National Park. The survey was designed to image the subsurface plumbing of...
By
Geology, Geophysics, and Geochemistry Science Center

Principal facts of gravity data from the Stillwater Complex, Montana, 2013-2014 and 2020 Principal facts of gravity data from the Stillwater Complex, Montana, 2013-2014 and 2020

Gravity data were collected during three separate campaigns during July of 2013, August and September of 2014, and September and October of 2020 at 168 sites on and around the Stillwater layered mafic complex in southern Montana. Measurements were taken with Lacoste & Romberg G-64, G-550, and G-161 gravimeters and reduced to obtain the complete Bouguer anomaly, with reference ties to...
By
Geology, Geophysics, and Geochemistry Science Center

Mount Baker and Mount Adams Airborne Magnetic and Electromagnetic Survey Data, August 2002, Washington, USA Mount Baker and Mount Adams Airborne Magnetic and Electromagnetic Survey Data, August 2002, Washington, USA

Hydrothermally altered rocks, particularly if water saturated, can weaken stratovolcanoes, thereby increasing the potential for catastrophic sector collapses that can lead to far-traveled, destructive debris flows, which are the largest volcanic hazards for Mount Adams and Mount Baker. Evaluating the hazards associated with such alteration is difficult because much of the alteration is...
By
Geology, Geophysics, and Geochemistry Science Center, Mount Adams, Mount Baker

Airborne Electromagnetic and Magnetic Survey, Yellowstone National Park, 2016 - Minimally Processed Data Airborne Electromagnetic and Magnetic Survey, Yellowstone National Park, 2016 - Minimally Processed Data

Airborne electromagnetic (AEM) and magnetic survey data were collected during November and December 2016 along 4,212 line-kilometers over Yellowstone National Park, Wyoming. The survey was conducted as part of a study of the subsurface geologic structure and geothermal and groundwater resources of Yellowstone National Park. The survey was designed to image the subsurface plumbing of...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne Magnetic Surveys over Oklahoma, 2017 Airborne Magnetic Surveys over Oklahoma, 2017

Airborne magnetic surveys were conducted in Oklahoma from August 11th, 2017-October 28th, 2017, by Goldak Airborne Surveys. Here we present downloadable flight line data from those surveys in comma-separated values (csv format). Three areas were flown along a draped surface with a nominal survey height above ground of 120 meters. The flight line spacing for these areas was 200 to 400 m...
By
Earthquake Hazards Program, Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Iliamna Volcano, Alaska, June 2012 Airborne electromagnetic and magnetic survey data, Iliamna Volcano, Alaska, June 2012

Airborne electromagnetic (AEM) and magnetic survey data were collected during June 2012 along 556 line-kilometers over Iliamna Volcano, Alaska. These data were collected in support of alteration and volcano flank instability mapping as part of the U.S. Geological Survey (USGS) Volcano Hazards Program. Data were acquired by SkyTEM Survey ApS SkyTEM304 system with the Soloy Helicopters...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000 (ver. 2.0, June 2020) Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000 (ver. 2.0, June 2020)

A helicopter-borne electromagnetic/magnetic survey was flown over the Stillwater area, southwest Montana from May 5 to May 16, 2000. The survey was conducted over the Stillwater Igneous Complex, a Precambrian layered mafic-ultramafic intrusion which is characterized by igneous layering. Electromagnetic data were acquired using DIGHEM helicopter-borne electromagnetic system. Magnetic data...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Bouguer gravity and magnetic susceptibility measurements at Iliamna Volcano, Alaska 2019 Bouguer gravity and magnetic susceptibility measurements at Iliamna Volcano, Alaska 2019

Gravity data were collected in August of 2019 at 21 sites on and around Iliamna Volcano and Anchorage, Alaska. Measurements were taken with a Lacoste & Romberg G-161 meter and reduced to obtain the complete Bouguer anomaly. A total of 39 magnetic susceptibility measurements were taken at 13 locations using a ZH Instruments SM30 susceptibility meter. This data release includes...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000 Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000

A helicopter-borne electromagnetic/magnetic survey was flown over the Stillwater area, southwest Montana from May 5 to May 16, 2000. The survey was conducted over the Stillwater Igneous Complex, a Precambrian layered mafic-ultramafic intrusion which is characterized by igneous layering. Electromagnetic data were acquired using DIGHEM helicopter-borne electromagnetic system. Magnetic data...
By
Mineral Resources Program, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center

Magnetic anomaly map of North America Magnetic anomaly map of North America

This digital Magnetic Anomaly database and map for the North American continent is the result of a joint effort by the Geological Survey of Canada (GSC), U.S. Geological Survey (USGS), and Consejo de Recursos Minerales of Mexico (CRM). The database and map represent a substantial upgrade from the previous compilation of Magnetic Anomaly data for North America, now over a decade old...

Gravity anomaly and terrain maps of Washington Gravity anomaly and terrain maps of Washington

No abstract available.

Residual Bouguer gravity anomaly map of the Cascade Range, California, Oregon, Washington, and British Columbia Residual Bouguer gravity anomaly map of the Cascade Range, California, Oregon, Washington, and British Columbia

No abstract available.

Gravity anomaly and terrain maps of the Cascade Range, California, Oregon, Washington, and British Columbia Gravity anomaly and terrain maps of the Cascade Range, California, Oregon, Washington, and British Columbia

No abstract available.

Gravity and aeromagnetic maps of the Goat Rocks Wilderness and adjacent Roadless Areas, Lewis and Yakima counties, Washington Gravity and aeromagnetic maps of the Goat Rocks Wilderness and adjacent Roadless Areas, Lewis and Yakima counties, Washington

No abstract available.
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Cross sections from one-dimensional electrical resistivity (top of each section) and three-dimensional magnetic susceptibility inverted models (bottom of each section) along profiles that span (a) Norris Geyser Basin, and (b) Upper Geyser Basin.  Geologic and geothermal features are from the Yellowstone geologic map. VE=vertical exaggeration.

By
Volcano Science Center, Yellowstone Volcano Observatory, Yellowstone
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Cross sections from one-dimensional electrical resistivity (top of each section) and three-dimensional magnetic susceptibility inverted models (bottom of each section) along profiles that span (a) Norris Geyser Basin, and (b) Upper Geyser Basin.  Geologic and geothermal features are from the Yellowstone geologic map. VE=vertical exaggeration.

By
Volcano Science Center, Yellowstone Volcano Observatory, Yellowstone
Filter Total Items: 130

Multi-scale geophysical imaging of a hydrothermal system in Yellowstone National Park, USA Multi-scale geophysical imaging of a hydrothermal system in Yellowstone National Park, USA

Little is known about the local plumbing systems that fuel Yellowstone’s famous hot springs, geysers and mud pots. A multi-method, multi-scale geophysical investigation was carried out in the Obsidian Pool Thermal Area (OPTA) to: (i) delineate the lateral extent of the hydrothermal area and associated surface features; (ii) estimate the dimensions of the upflow zone and identify its main...
Authors
Sylvain Pasquet, W. Holbrook, Bradley J. Carr, Neil Terry, Martin Briggs, Carol A. Finn, Paul Bedrosian, Esben Auken, Jesper Pedersen, Pradip Maurya, Kenneth Sims
By
Water Resources Mission Area

Tungsten skarn quantitative mineral resource assessment and gold, rare earth elements, graphite, and uranium qualitative assessments of the Kuldjuktau and Auminzatau Ranges, in the central Kyzylkum region, Uzbekistan Tungsten skarn quantitative mineral resource assessment and gold, rare earth elements, graphite, and uranium qualitative assessments of the Kuldjuktau and Auminzatau Ranges, in the central Kyzylkum region, Uzbekistan

A new quantitative mineral resource assessment for tungsten skarn was conducted for the Auminzatau and Kuldjuktau mountain ranges in Central Uzbekistan, along with qualitative assessments of orogenic gold, rare earth elements (REEs), amorphous graphite, and uranium. By integrating a variety of geological, geochemical, geophysical, and remote sensing data sets, estimates of undiscovered...
Authors
Joshua Coyan, Federico Solano, Cliff Taylor, Carol A. Finn, Steven Smith, Christopher S. Holm-Denoma, Laura Pianowski, Kelsey Elizabeth Crocker, Rustam Mirkamalov, Fareed Divaev, Abdulla Baratov, Botir Khakimov, Jurabek Azimov, Akrom Goipov, Jamshid Avulov, Shokir Akhmadov, Nurbek Inatov, Xurshid Janiev, Nafisa Dulabova
By
Geology, Energy, and Minerals Mission Area, Geology, Minerals, Energy, and Geophysics Science Center

State shifts in the deep Critical Zone drive landscape evolution in volcanic terrains State shifts in the deep Critical Zone drive landscape evolution in volcanic terrains

Understanding the near-surface environment where atmospheric and solid earth processes interact, often termed the “Critical Zone,” is important for assessing resources and building resilient societies. Here, we examine a volcanic landscape in the Oregon Cascade Range, an understudied Critical Zone setting that is host to major regional water resources, pervasive silicate weathering, and...
Authors
Leif Karlstrom, Nathaniel Klema, Gordon E. Grant, Carol A. Finn, Pamela Sullivan, Sarah Cooley, Alex Simpson, Becky Fasth, Katherine Cashman, Ken Ferrier, Lyndsay Ball, Daniele McKay
By
Geology, Geophysics, and Geochemistry Science Center

Deep magmatic staging chambers for crustal layered mafic intrusions: An example from the Bushveld Complex of southern Africa Deep magmatic staging chambers for crustal layered mafic intrusions: An example from the Bushveld Complex of southern Africa

The deep mafic magmatic staging chambers of layered mafic intrusions have been conjectured but not imaged. Their existence has long been postulated from geochemical models which require multiple magma injections from staging chambers to account for their multi-scale igneous layering and variations in sources and degrees of crustal contamination. For the Bushveld Complex of southern...
Authors
Janine Cole, Carol A. Finn, Susan Webb
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Electromagnetic and magnetic imaging of the Stillwater Complex, Montana, USA Electromagnetic and magnetic imaging of the Stillwater Complex, Montana, USA

Modelling and analysis of helicopter electromagnetic data result in resistivity and susceptibility models and derivatives of magnetic data that characterise shallow parts of the Stillwater Complex, critical for aiding exploration and expansion of globally scarce critical and battery mineral resources that include platinum group elements, nickel, copper and chromium. The magnetic...
Authors
Carol A. Finn, Michael L. Zientek, Benjamin Bloss, Heather Parks, Justin Modroo
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Subsurface characterization of the Duluth Complex and related intrusions from 3D modeling of gravity and magnetotelluric data Subsurface characterization of the Duluth Complex and related intrusions from 3D modeling of gravity and magnetotelluric data

No abstract available.
Authors
Dana Peterson, Paul Bedrosian, Carol A. Finn
By
Geology, Geophysics, and Geochemistry Science Center

The 180-km-long Meers-Willow Fault System in the Southern Oklahoma Aulacogen: A potential U.S. mid-continent seismic hazard The 180-km-long Meers-Willow Fault System in the Southern Oklahoma Aulacogen: A potential U.S. mid-continent seismic hazard

We integrate new high-resolution aeromagnetic data with seismic reflection data, well logs, satellite remote sensing, and field observations to provide a regional view of buried and exposed structures in the Southern Oklahoma Aulacogen and to assess their potential for future seismicity. Trends ranging from NW−SE to ∼E−W, peaking at 330° ± 4.5° and 280° ± 3°, dominate the magnetic...
Authors
Brandon Chase, Folarin Kolawole, Estella Atekwana, Brett Carpenter, Molly Turko, Mohamed Abdelsalam, Carol A. Finn
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geophysical imaging of the Yellowstone hydrothermal plumbing system Geophysical imaging of the Yellowstone hydrothermal plumbing system

The nature of Yellowstone National Park’s plumbing system linking deep thermal fluids to its legendary thermal features is virtually unknown. The prevailing concepts of Yellowstone hydrology and chemistry are that fluids reside in reservoirs with unknown geometries, flow laterally from distal sources and emerge at the edges of lava flows. Here we present a high-resolution synoptic view...
Authors
Carol A. Finn, Paul Bedrosian, W. Holbrook, Esben Auken, Benjamin Bloss, Kayla Crosbie
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Drivers of seedling establishment success in dryland restoration efforts Drivers of seedling establishment success in dryland restoration efforts

Restoration of degraded drylands is urgently needed to mitigate climate change, reverse desertification and secure livelihoods for the two billion people who live in these areas. Bold global targets have been set for dryland restoration to restore millions of hectares of degraded land. These targets have been questioned as overly ambitious, but without a global evaluation of successes...
Authors
Nancy Shackelford, Gustavo Paterno, Daniel Winkler, Todd Erickson, Elizabeth Leger, Lauren Svejcar, Martin Breed, Akasha Faist, Peter Harrison, Michael Curran, Qinfeng Guo, Anita Kirmer, Darin Law, Kevin Mganga, Seth Munson, Lauren Porensky, Raul Quiroga, Peter Torok, Claire Wainwright, Ali Abdullahi, Matt Bahm, Elizabeth Ballenger, Nichole Barger, Owen Baughman, Carina Becker, Manuel Lucas-Borja, Chad Boyd, Carla Burton, Philip Burton, Eman Calleja, Peter Carrick, Alex Caruana, Charlie Clements, Kirk Davies, Balazs Deak, Jessica Drake, Sandra Dullau, Joshua Eldridge, Erin Espeland, Stephen Fick, Magda Garbowski, Enrique de la Riva, Peter Golos, Penelope Grey, Barry Heydenrych, Patricia Holmes, Jeremy James, Jayne Jonas-Bratten, Reka Kiss, Andrea Kramer, Julie Larson, Juan Lorite, C. Mayence, Luis Merino-Martin, Tamas Miglecz, Suanne Milton, Thomas Monaco, Arlee Montalvo, Jose Navarro-Cano, Mark Paschke, Pablo Peri, Monica Pokorny, Matthew Rinella, Nelmarie Saayman, Merilynn Schantz, Tina Parkhurst, Eric Seabloom, Katharine Stuble, Shauna Uselman, Orsolya Valko, Kari Veblen, Scott Wilson, Megan Wong, Zhiwei Xu, Katharine Suding
By
Ecosystems Mission Area, Southwest Biological Science Center

3-D Modeling of the Duluth Complex from geophysical data 3-D Modeling of the Duluth Complex from geophysical data

The Mesoproterozoic Duluth Complex in northeastern Minnesota is one of the major plutonic components of the Midcontinent Rift System and hosts a variety of copper-nickel sulfide and platinum-group element deposits. The Duluth Complex is composed of a series of individual mafic and felsic intrusions emplaced 1110-1098 Ma within Paleoproterozoic sedimentary rocks of the Animikie basin and...
Authors
Dana Peterson, Paul Bedrosian, Carol A. Finn
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geometry of the Bushveld Complex from 3D potential field modelling Geometry of the Bushveld Complex from 3D potential field modelling

A full three-dimensional (3D) potential field model of the central and southern Bushveld Complex reveals information about the Complex in areas obscured by younger geological cover. Previously, two-dimensional gravity models and a few magnetic models limited to certain sections of the Bushveld Complex have been used to propose geometries for the Rustenburg Layered Suite, especially in...
Authors
Janine Cole, Carol A. Finn, Susan Webb
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne geophysical imaging of weak zones on Iliamna Volcano, Alaska: Implications for slope stability Airborne geophysical imaging of weak zones on Iliamna Volcano, Alaska: Implications for slope stability

Water‐saturated, hydrothermally altered rocks reduce the strength of volcanic edifices and increase the potential for sector collapses and far‐traveled mass flows of unconsolidated debris. Iliamna Volcano is an andesitic stratovolcano located on the western side of the Cook Inlet, ∼225 km southwest of Anchorage and is a source of repeated avalanches. The widespread snow and ice cover on...
Authors
Dana Peterson, Carol A. Finn, Paul Bedrosian
By
Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Science and Products

Image Collage of Landsat, pollinator, and volcanologist

Large Magmatic Systems for Minerals

This project continues work on large magmatic systems in the U.S., where critical mineral commodities important to clean energy technologies can be concentrated. Modeling of large mafic intrusion extents will continue, and new geophysical methods will be applied to improve understanding of magmatic systems.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Large Magmatic Systems for Minerals

Large Magmatic Systems for Minerals

This project continues work on large magmatic systems in the U.S., where critical mineral commodities important to clean energy technologies can be concentrated. Modeling of large mafic intrusion extents will continue, and new geophysical methods will be applied to improve understanding of magmatic systems.
Learn More
Satellite map view of world with four countries highlighted in green.

International Integrated Minerals Interpretation

We will publish reports and interpretive papers on existing data from USGS internal mineral resource assessment collaborative work.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
International Integrated Minerals Interpretation

International Integrated Minerals Interpretation

We will publish reports and interpretive papers on existing data from USGS internal mineral resource assessment collaborative work.
Learn More
Stillwater River canyon with mine

Geophysical Studies on the Architecture of Large Igneous Systems Hosting Magmatic Ore Deposits

Platinum group elements, also known as PGEs, are a group of elements that have specific properties which make them useful for various applications in industry. One geologic setting that contains large concentrations of platinum group elements is layered mafic intrusions. This project will use new and preexisting geophysical datasets to characterize the internal structure of layered intrusions...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Geophysical Studies on the Architecture of Large Igneous Systems Hosting Magmatic Ore Deposits

Geophysical Studies on the Architecture of Large Igneous Systems Hosting Magmatic Ore Deposits

Platinum group elements, also known as PGEs, are a group of elements that have specific properties which make them useful for various applications in industry. One geologic setting that contains large concentrations of platinum group elements is layered mafic intrusions. This project will use new and preexisting geophysical datasets to characterize the internal structure of layered intrusions...
Learn More

Surface geophysical data from Ollalie North springs, west-central Oregon Surface geophysical data from Ollalie North springs, west-central Oregon

Surface electrical resistivity tomography (ERT) data were collected in September of 2018 near Ollalie North springs in the upper McKenzie River watershed of west-central Oregon. ERT data were acquired along a single transect on the north bank of Ollalie Creek using a combination of inverse Schlumberger, dipole-dipole, and Wenner arrays. These data were collected to contribute high...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne Electromagnetic Survey Processed Data and Models Data Release, Yellowstone National Park, Wyoming, 2016 Airborne Electromagnetic Survey Processed Data and Models Data Release, Yellowstone National Park, Wyoming, 2016

Airborne electromagnetic (AEM) and magnetic survey data were collected during November and December 2016 along 4,212 line-kilometers over Yellowstone National Park, Wyoming. The survey was conducted as part of a study of the subsurface geologic structure and geothermal and groundwater resources of Yellowstone National Park. The survey was designed to image the subsurface plumbing of...
By
Geology, Geophysics, and Geochemistry Science Center

Principal facts of gravity data from the Stillwater Complex, Montana, 2013-2014 and 2020 Principal facts of gravity data from the Stillwater Complex, Montana, 2013-2014 and 2020

Gravity data were collected during three separate campaigns during July of 2013, August and September of 2014, and September and October of 2020 at 168 sites on and around the Stillwater layered mafic complex in southern Montana. Measurements were taken with Lacoste & Romberg G-64, G-550, and G-161 gravimeters and reduced to obtain the complete Bouguer anomaly, with reference ties to...
By
Geology, Geophysics, and Geochemistry Science Center

Mount Baker and Mount Adams Airborne Magnetic and Electromagnetic Survey Data, August 2002, Washington, USA Mount Baker and Mount Adams Airborne Magnetic and Electromagnetic Survey Data, August 2002, Washington, USA

Hydrothermally altered rocks, particularly if water saturated, can weaken stratovolcanoes, thereby increasing the potential for catastrophic sector collapses that can lead to far-traveled, destructive debris flows, which are the largest volcanic hazards for Mount Adams and Mount Baker. Evaluating the hazards associated with such alteration is difficult because much of the alteration is...
By
Geology, Geophysics, and Geochemistry Science Center, Mount Adams, Mount Baker

Airborne Electromagnetic and Magnetic Survey, Yellowstone National Park, 2016 - Minimally Processed Data Airborne Electromagnetic and Magnetic Survey, Yellowstone National Park, 2016 - Minimally Processed Data

Airborne electromagnetic (AEM) and magnetic survey data were collected during November and December 2016 along 4,212 line-kilometers over Yellowstone National Park, Wyoming. The survey was conducted as part of a study of the subsurface geologic structure and geothermal and groundwater resources of Yellowstone National Park. The survey was designed to image the subsurface plumbing of...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne Magnetic Surveys over Oklahoma, 2017 Airborne Magnetic Surveys over Oklahoma, 2017

Airborne magnetic surveys were conducted in Oklahoma from August 11th, 2017-October 28th, 2017, by Goldak Airborne Surveys. Here we present downloadable flight line data from those surveys in comma-separated values (csv format). Three areas were flown along a draped surface with a nominal survey height above ground of 120 meters. The flight line spacing for these areas was 200 to 400 m...
By
Earthquake Hazards Program, Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Iliamna Volcano, Alaska, June 2012 Airborne electromagnetic and magnetic survey data, Iliamna Volcano, Alaska, June 2012

Airborne electromagnetic (AEM) and magnetic survey data were collected during June 2012 along 556 line-kilometers over Iliamna Volcano, Alaska. These data were collected in support of alteration and volcano flank instability mapping as part of the U.S. Geological Survey (USGS) Volcano Hazards Program. Data were acquired by SkyTEM Survey ApS SkyTEM304 system with the Soloy Helicopters...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000 (ver. 2.0, June 2020) Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000 (ver. 2.0, June 2020)

A helicopter-borne electromagnetic/magnetic survey was flown over the Stillwater area, southwest Montana from May 5 to May 16, 2000. The survey was conducted over the Stillwater Igneous Complex, a Precambrian layered mafic-ultramafic intrusion which is characterized by igneous layering. Electromagnetic data were acquired using DIGHEM helicopter-borne electromagnetic system. Magnetic data...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Bouguer gravity and magnetic susceptibility measurements at Iliamna Volcano, Alaska 2019 Bouguer gravity and magnetic susceptibility measurements at Iliamna Volcano, Alaska 2019

Gravity data were collected in August of 2019 at 21 sites on and around Iliamna Volcano and Anchorage, Alaska. Measurements were taken with a Lacoste & Romberg G-161 meter and reduced to obtain the complete Bouguer anomaly. A total of 39 magnetic susceptibility measurements were taken at 13 locations using a ZH Instruments SM30 susceptibility meter. This data release includes...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000 Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000

A helicopter-borne electromagnetic/magnetic survey was flown over the Stillwater area, southwest Montana from May 5 to May 16, 2000. The survey was conducted over the Stillwater Igneous Complex, a Precambrian layered mafic-ultramafic intrusion which is characterized by igneous layering. Electromagnetic data were acquired using DIGHEM helicopter-borne electromagnetic system. Magnetic data...
By
Mineral Resources Program, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center

Magnetic anomaly map of North America Magnetic anomaly map of North America

This digital Magnetic Anomaly database and map for the North American continent is the result of a joint effort by the Geological Survey of Canada (GSC), U.S. Geological Survey (USGS), and Consejo de Recursos Minerales of Mexico (CRM). The database and map represent a substantial upgrade from the previous compilation of Magnetic Anomaly data for North America, now over a decade old...

Gravity anomaly and terrain maps of Washington Gravity anomaly and terrain maps of Washington

No abstract available.

Residual Bouguer gravity anomaly map of the Cascade Range, California, Oregon, Washington, and British Columbia Residual Bouguer gravity anomaly map of the Cascade Range, California, Oregon, Washington, and British Columbia

No abstract available.

Gravity anomaly and terrain maps of the Cascade Range, California, Oregon, Washington, and British Columbia Gravity anomaly and terrain maps of the Cascade Range, California, Oregon, Washington, and British Columbia

No abstract available.

Gravity and aeromagnetic maps of the Goat Rocks Wilderness and adjacent Roadless Areas, Lewis and Yakima counties, Washington Gravity and aeromagnetic maps of the Goat Rocks Wilderness and adjacent Roadless Areas, Lewis and Yakima counties, Washington

No abstract available.
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Cross sections from one-dimensional electrical resistivity (top of each section) and three-dimensional magnetic susceptibility inverted models (bottom of each section) along profiles that span (a) Norris Geyser Basin, and (b) Upper Geyser Basin.  Geologic and geothermal features are from the Yellowstone geologic map. VE=vertical exaggeration.

By
Volcano Science Center, Yellowstone Volcano Observatory, Yellowstone
Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Resistivity and magmatic susceptibility cross sections from Yellowstone thermal areas

Cross sections from one-dimensional electrical resistivity (top of each section) and three-dimensional magnetic susceptibility inverted models (bottom of each section) along profiles that span (a) Norris Geyser Basin, and (b) Upper Geyser Basin.  Geologic and geothermal features are from the Yellowstone geologic map. VE=vertical exaggeration.

By
Volcano Science Center, Yellowstone Volcano Observatory, Yellowstone
Filter Total Items: 130

Multi-scale geophysical imaging of a hydrothermal system in Yellowstone National Park, USA Multi-scale geophysical imaging of a hydrothermal system in Yellowstone National Park, USA

Little is known about the local plumbing systems that fuel Yellowstone’s famous hot springs, geysers and mud pots. A multi-method, multi-scale geophysical investigation was carried out in the Obsidian Pool Thermal Area (OPTA) to: (i) delineate the lateral extent of the hydrothermal area and associated surface features; (ii) estimate the dimensions of the upflow zone and identify its main...
Authors
Sylvain Pasquet, W. Holbrook, Bradley J. Carr, Neil Terry, Martin Briggs, Carol A. Finn, Paul Bedrosian, Esben Auken, Jesper Pedersen, Pradip Maurya, Kenneth Sims
By
Water Resources Mission Area

Tungsten skarn quantitative mineral resource assessment and gold, rare earth elements, graphite, and uranium qualitative assessments of the Kuldjuktau and Auminzatau Ranges, in the central Kyzylkum region, Uzbekistan Tungsten skarn quantitative mineral resource assessment and gold, rare earth elements, graphite, and uranium qualitative assessments of the Kuldjuktau and Auminzatau Ranges, in the central Kyzylkum region, Uzbekistan

A new quantitative mineral resource assessment for tungsten skarn was conducted for the Auminzatau and Kuldjuktau mountain ranges in Central Uzbekistan, along with qualitative assessments of orogenic gold, rare earth elements (REEs), amorphous graphite, and uranium. By integrating a variety of geological, geochemical, geophysical, and remote sensing data sets, estimates of undiscovered...
Authors
Joshua Coyan, Federico Solano, Cliff Taylor, Carol A. Finn, Steven Smith, Christopher S. Holm-Denoma, Laura Pianowski, Kelsey Elizabeth Crocker, Rustam Mirkamalov, Fareed Divaev, Abdulla Baratov, Botir Khakimov, Jurabek Azimov, Akrom Goipov, Jamshid Avulov, Shokir Akhmadov, Nurbek Inatov, Xurshid Janiev, Nafisa Dulabova
By
Geology, Energy, and Minerals Mission Area, Geology, Minerals, Energy, and Geophysics Science Center

State shifts in the deep Critical Zone drive landscape evolution in volcanic terrains State shifts in the deep Critical Zone drive landscape evolution in volcanic terrains

Understanding the near-surface environment where atmospheric and solid earth processes interact, often termed the “Critical Zone,” is important for assessing resources and building resilient societies. Here, we examine a volcanic landscape in the Oregon Cascade Range, an understudied Critical Zone setting that is host to major regional water resources, pervasive silicate weathering, and...
Authors
Leif Karlstrom, Nathaniel Klema, Gordon E. Grant, Carol A. Finn, Pamela Sullivan, Sarah Cooley, Alex Simpson, Becky Fasth, Katherine Cashman, Ken Ferrier, Lyndsay Ball, Daniele McKay
By
Geology, Geophysics, and Geochemistry Science Center

Deep magmatic staging chambers for crustal layered mafic intrusions: An example from the Bushveld Complex of southern Africa Deep magmatic staging chambers for crustal layered mafic intrusions: An example from the Bushveld Complex of southern Africa

The deep mafic magmatic staging chambers of layered mafic intrusions have been conjectured but not imaged. Their existence has long been postulated from geochemical models which require multiple magma injections from staging chambers to account for their multi-scale igneous layering and variations in sources and degrees of crustal contamination. For the Bushveld Complex of southern...
Authors
Janine Cole, Carol A. Finn, Susan Webb
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Electromagnetic and magnetic imaging of the Stillwater Complex, Montana, USA Electromagnetic and magnetic imaging of the Stillwater Complex, Montana, USA

Modelling and analysis of helicopter electromagnetic data result in resistivity and susceptibility models and derivatives of magnetic data that characterise shallow parts of the Stillwater Complex, critical for aiding exploration and expansion of globally scarce critical and battery mineral resources that include platinum group elements, nickel, copper and chromium. The magnetic...
Authors
Carol A. Finn, Michael L. Zientek, Benjamin Bloss, Heather Parks, Justin Modroo
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Subsurface characterization of the Duluth Complex and related intrusions from 3D modeling of gravity and magnetotelluric data Subsurface characterization of the Duluth Complex and related intrusions from 3D modeling of gravity and magnetotelluric data

No abstract available.
Authors
Dana Peterson, Paul Bedrosian, Carol A. Finn
By
Geology, Geophysics, and Geochemistry Science Center

The 180-km-long Meers-Willow Fault System in the Southern Oklahoma Aulacogen: A potential U.S. mid-continent seismic hazard The 180-km-long Meers-Willow Fault System in the Southern Oklahoma Aulacogen: A potential U.S. mid-continent seismic hazard

We integrate new high-resolution aeromagnetic data with seismic reflection data, well logs, satellite remote sensing, and field observations to provide a regional view of buried and exposed structures in the Southern Oklahoma Aulacogen and to assess their potential for future seismicity. Trends ranging from NW−SE to ∼E−W, peaking at 330° ± 4.5° and 280° ± 3°, dominate the magnetic...
Authors
Brandon Chase, Folarin Kolawole, Estella Atekwana, Brett Carpenter, Molly Turko, Mohamed Abdelsalam, Carol A. Finn
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geophysical imaging of the Yellowstone hydrothermal plumbing system Geophysical imaging of the Yellowstone hydrothermal plumbing system

The nature of Yellowstone National Park’s plumbing system linking deep thermal fluids to its legendary thermal features is virtually unknown. The prevailing concepts of Yellowstone hydrology and chemistry are that fluids reside in reservoirs with unknown geometries, flow laterally from distal sources and emerge at the edges of lava flows. Here we present a high-resolution synoptic view...
Authors
Carol A. Finn, Paul Bedrosian, W. Holbrook, Esben Auken, Benjamin Bloss, Kayla Crosbie
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Drivers of seedling establishment success in dryland restoration efforts Drivers of seedling establishment success in dryland restoration efforts

Restoration of degraded drylands is urgently needed to mitigate climate change, reverse desertification and secure livelihoods for the two billion people who live in these areas. Bold global targets have been set for dryland restoration to restore millions of hectares of degraded land. These targets have been questioned as overly ambitious, but without a global evaluation of successes...
Authors
Nancy Shackelford, Gustavo Paterno, Daniel Winkler, Todd Erickson, Elizabeth Leger, Lauren Svejcar, Martin Breed, Akasha Faist, Peter Harrison, Michael Curran, Qinfeng Guo, Anita Kirmer, Darin Law, Kevin Mganga, Seth Munson, Lauren Porensky, Raul Quiroga, Peter Torok, Claire Wainwright, Ali Abdullahi, Matt Bahm, Elizabeth Ballenger, Nichole Barger, Owen Baughman, Carina Becker, Manuel Lucas-Borja, Chad Boyd, Carla Burton, Philip Burton, Eman Calleja, Peter Carrick, Alex Caruana, Charlie Clements, Kirk Davies, Balazs Deak, Jessica Drake, Sandra Dullau, Joshua Eldridge, Erin Espeland, Stephen Fick, Magda Garbowski, Enrique de la Riva, Peter Golos, Penelope Grey, Barry Heydenrych, Patricia Holmes, Jeremy James, Jayne Jonas-Bratten, Reka Kiss, Andrea Kramer, Julie Larson, Juan Lorite, C. Mayence, Luis Merino-Martin, Tamas Miglecz, Suanne Milton, Thomas Monaco, Arlee Montalvo, Jose Navarro-Cano, Mark Paschke, Pablo Peri, Monica Pokorny, Matthew Rinella, Nelmarie Saayman, Merilynn Schantz, Tina Parkhurst, Eric Seabloom, Katharine Stuble, Shauna Uselman, Orsolya Valko, Kari Veblen, Scott Wilson, Megan Wong, Zhiwei Xu, Katharine Suding
By
Ecosystems Mission Area, Southwest Biological Science Center

3-D Modeling of the Duluth Complex from geophysical data 3-D Modeling of the Duluth Complex from geophysical data

The Mesoproterozoic Duluth Complex in northeastern Minnesota is one of the major plutonic components of the Midcontinent Rift System and hosts a variety of copper-nickel sulfide and platinum-group element deposits. The Duluth Complex is composed of a series of individual mafic and felsic intrusions emplaced 1110-1098 Ma within Paleoproterozoic sedimentary rocks of the Animikie basin and...
Authors
Dana Peterson, Paul Bedrosian, Carol A. Finn
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Geometry of the Bushveld Complex from 3D potential field modelling Geometry of the Bushveld Complex from 3D potential field modelling

A full three-dimensional (3D) potential field model of the central and southern Bushveld Complex reveals information about the Complex in areas obscured by younger geological cover. Previously, two-dimensional gravity models and a few magnetic models limited to certain sections of the Bushveld Complex have been used to propose geometries for the Rustenburg Layered Suite, especially in...
Authors
Janine Cole, Carol A. Finn, Susan Webb
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne geophysical imaging of weak zones on Iliamna Volcano, Alaska: Implications for slope stability Airborne geophysical imaging of weak zones on Iliamna Volcano, Alaska: Implications for slope stability

Water‐saturated, hydrothermally altered rocks reduce the strength of volcanic edifices and increase the potential for sector collapses and far‐traveled mass flows of unconsolidated debris. Iliamna Volcano is an andesitic stratovolcano located on the western side of the Cook Inlet, ∼225 km southwest of Anchorage and is a source of repeated avalanches. The widespread snow and ice cover on...
Authors
Dana Peterson, Carol A. Finn, Paul Bedrosian
By
Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government

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