National Geochemical Database Active
The National Geochemical Database project assembles, reformats, corrects, and archives historical data obtained from the geochemical analysis of millions of geologic samples collected for USGS studies. These data, representing hundreds of millions of dollars' worth of USGS research, are provided to USGS researchers; other Federal agencies; State Geological Surveys and Environmental Protection agencies; mining, mineral exploration, and environmental industries; independent consultants; academicians; students; and private citizens through online portals and project collaboration.
Science Issue and Relevance
Beginning in 1964, analytical laboratories now housed within the Mineral Resources Program have recorded geochemical data in digital databases. During this time, these laboratories have analyzed over 1.4 million samples of geologic material such as soils, stream sediments, and rocks, and continue to analyze several thousand samples annually. The database representing these analyses contains in excess of 50 million analytical determinations and is growing daily. In 1984 the Mineral Resources Program inherited management responsibilities for the geochemical data generated on over 500,000 samples of stream sediments, soils, and waters by the Department of Energy's National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) Program, which was conducted during the late 1970s and early 1980s. This project addresses the preservation of all the archival chemical data and all the newly generated data in perpetuity in an accurate, easily accessible, user-friendly, secure database.
An accurate, easily accessible geochemical database containing multi-element information on the surficial materials of the nation is vital if the USGS is to respond quickly to earth science issues raised by Congress and land management and environmental protection agencies. A nationally consistent geochemical database provides baseline information on the natural abundance and spatial variation of chemical elements to which changes caused by agricultural and irrigation practices, waste disposal, urbanization, industrial pollution, mineral exploration and mining activities, environmental remediation and restoration activities, and other land-use practices can be compared. Human-induced chemical changes to the environment are superimposed on a variable natural geochemical background where trace-element abundances can range over several orders of magnitude within short distances. These variations are inadequately documented and their existence is often overlooked in the setting of public policy. Important aspects of change cannot be measured, or their consequences anticipated, unless the present composition of the earth's surface materials is known.
Since 1995, National Geochemical Database projects have succeeded in converting, reformatting, combining, and preserving disparate geochemical data stored in Rock Analysis Storage System (RASS - the geochemical database maintained by the former Branches of Regional Geochemistry and Exploration Research from 1968-1987); archive PLUTO (the archive geochemical database maintained by the former Branches of Analytical Laboratories and Geochemistry from 1979-1995); and ATHENA (the geochemical database maintained by the Mineral Resources Science Center within the former in-house Laboratory Information Management System (PLUTO/LIMS) from 1995-1997). All of these data are now housed in the National Geochemical Database.
Methods to Address Issue
The current phase of the National Geochemical Database project has been divided into five tasks, each of which uniquely contributes to the goals and the strategy of the project.
- National Geochemical Database Reassessment, Outreach, and Liaison
- National Geochemical Database Development and Maintenance
- National Geochemical Database and NURE Database Delivery
- Data Renovation and Recovery
- Web-based Sample Submittal Process Development
Geospatial Data
National Geochemical Database geospatial data is available online. Find geochemistry of rocks, sediments, soils, and concentrates in the database. The database consists of primarily inorganic elemental concentrations; most samples are of earth materials in the continental US and Alaska.
National Geochemical Database
Rock
Sediment
Soil
Concentrate
Alaska
Below are other science projects associated with this project.
GIS Prospectivity Analysis for Critical Minerals in Ore-Forming Systems in Alaska
Analytical Chemistry
Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri—From the Ore Deposit Scale to a Global Deposit Model
Below are data releases associated with this project.
Legacy Geochemical Data from Hardcopy Records of Selected Past U.S. Geological Survey Projects
Geochemical data generated by projects funded by the USGS Earth Mapping Resources Initiative (ver. 9.0, February 2024)
Geochemical Data Release for Idaho Primitive Area, including the contiguous Clear Creek-Upper Big Deer Creek Area, the Salmon River Breaks Primitive Area, the Sawtooth Primitive Area, and adjacent areas, central Idaho (ver. 1.2, June 2022)
National Geochemical Database on Ore Deposits: Legacy data
Reanalysis of Selected Archived NURE-HSSR Sediment and Soil Samples from Arizona, California, Idaho, Montana, Nevada, New Mexico, and Utah
Reanalysis of Additional Selected Archived NURE-HSSR Sediment Samples from Idaho and Montana
Geochemical data used in the tungsten skarn mineral resource assessment of the Great Basin region of western Nevada and eastern California
Reanalysis of Selected Archived NURE-HSSR Sediment and Soil Samples from Alaska
Geochemical and Modal Data for Mesoproterozoic Igneous Rocks of the St. Francois Mountains, Southeast Missouri
Geochemical Database for Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri, 2016-2017
Global Geochemical Database for Critical Metals in Black Shales
Operation Basement: Missouri Precambrian Sample Database
Below are publications associated with this project.
GIS-based identification of areas that have resource potential for lode gold in Alaska
Data release of reprocessed select National Uranium Resources Evaluation program samples in Wyoming
Evaluation of the analytical methods used to determine the elemental concentrations found in the stream geochemical dataset compiled for Alaska
Alaska Geochemical Database Version 3.0 (AGDB3)—Including “Best Value” Data Compilations for Rock, Sediment, Soil, Mineral, and Concentrate Sample Media
Geology and mineral resources of the North-Central Montana Sagebrush Focal Area: Chapter D in Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming
Geology and mineral resources of the North-Central Idaho Sagebrush Focal Area: Chapter C in Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming
Overview with methods and procedures of the U.S. Geological Survey mineral-resource assessment of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming: Chapter A in Mineral resources of the Sagebrush Focal Areas of Idaho, Mont
The geochemical atlas of Alaska, 2016
Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska
Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Kougarok area, Bendeleben and Teller quadrangles, Seward Peninsula, Alaska
Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Haines area, Juneau and Skagway quadrangles, southeast Alaska
Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Tonsina area, Valdez Quadrangle, Alaska
- Overview
The National Geochemical Database project assembles, reformats, corrects, and archives historical data obtained from the geochemical analysis of millions of geologic samples collected for USGS studies. These data, representing hundreds of millions of dollars' worth of USGS research, are provided to USGS researchers; other Federal agencies; State Geological Surveys and Environmental Protection agencies; mining, mineral exploration, and environmental industries; independent consultants; academicians; students; and private citizens through online portals and project collaboration.
Science Issue and Relevance
Beginning in 1964, analytical laboratories now housed within the Mineral Resources Program have recorded geochemical data in digital databases. During this time, these laboratories have analyzed over 1.4 million samples of geologic material such as soils, stream sediments, and rocks, and continue to analyze several thousand samples annually. The database representing these analyses contains in excess of 50 million analytical determinations and is growing daily. In 1984 the Mineral Resources Program inherited management responsibilities for the geochemical data generated on over 500,000 samples of stream sediments, soils, and waters by the Department of Energy's National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) Program, which was conducted during the late 1970s and early 1980s. This project addresses the preservation of all the archival chemical data and all the newly generated data in perpetuity in an accurate, easily accessible, user-friendly, secure database.
An accurate, easily accessible geochemical database containing multi-element information on the surficial materials of the nation is vital if the USGS is to respond quickly to earth science issues raised by Congress and land management and environmental protection agencies. A nationally consistent geochemical database provides baseline information on the natural abundance and spatial variation of chemical elements to which changes caused by agricultural and irrigation practices, waste disposal, urbanization, industrial pollution, mineral exploration and mining activities, environmental remediation and restoration activities, and other land-use practices can be compared. Human-induced chemical changes to the environment are superimposed on a variable natural geochemical background where trace-element abundances can range over several orders of magnitude within short distances. These variations are inadequately documented and their existence is often overlooked in the setting of public policy. Important aspects of change cannot be measured, or their consequences anticipated, unless the present composition of the earth's surface materials is known.
Since 1995, National Geochemical Database projects have succeeded in converting, reformatting, combining, and preserving disparate geochemical data stored in Rock Analysis Storage System (RASS - the geochemical database maintained by the former Branches of Regional Geochemistry and Exploration Research from 1968-1987); archive PLUTO (the archive geochemical database maintained by the former Branches of Analytical Laboratories and Geochemistry from 1979-1995); and ATHENA (the geochemical database maintained by the Mineral Resources Science Center within the former in-house Laboratory Information Management System (PLUTO/LIMS) from 1995-1997). All of these data are now housed in the National Geochemical Database.
Methods to Address Issue
The current phase of the National Geochemical Database project has been divided into five tasks, each of which uniquely contributes to the goals and the strategy of the project.
- National Geochemical Database Reassessment, Outreach, and Liaison
- National Geochemical Database Development and Maintenance
- National Geochemical Database and NURE Database Delivery
- Data Renovation and Recovery
- Web-based Sample Submittal Process Development
Geospatial Data
National Geochemical Database geospatial data is available online. Find geochemistry of rocks, sediments, soils, and concentrates in the database. The database consists of primarily inorganic elemental concentrations; most samples are of earth materials in the continental US and Alaska.
National Geochemical DatabaseNational Geochemical DatabaseRockRockSedimentSedimentSoilSoilConcentrateConcentrateAlaskaAlaska - Science
Below are other science projects associated with this project.
GIS Prospectivity Analysis for Critical Minerals in Ore-Forming Systems in Alaska
Alaska is dominated by a history of tectonic events that foster mobilization and concentration of a wide variety of mineral commodities that are critical to the US economy and are vital to national defense, renewable-energy, and emerging electronics technologies.Analytical Chemistry
The USGS Mineral Resources Program and other USGS scientists need specialized routine analysis in order to conduct their research. The Analytical Chemistry project facilitates the ability of USGS scientists to obtain needed analyses.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... - Data
Below are data releases associated with this project.
Filter Total Items: 15Legacy Geochemical Data from Hardcopy Records of Selected Past U.S. Geological Survey Projects
This data release contains geochemical data from selected U.S. Geological Survey (USGS) projects from the 1960s-1980s that were previously unpublished as digital data. The objective of those projects was to describe the geology, determine petrologic and geochemical characteristics, or to evaluate the mineral resource potential of Federal Lands and adjacent study areas. These data comprise geochemiGeochemical data generated by projects funded by the USGS Earth Mapping Resources Initiative (ver. 9.0, February 2024)
The geochemical data included here were generated as part of the Earth Mapping Resources Initiative (Earth MRI), which was developed by the U.S. Geological Survey (USGS) in response to a Federal directive calling on various Federal agencies to address potential vulnerabilities in the Nation’s supply of critical mineral resources. Earth MRI is a partnership between the USGS, State Geological SurveyGeochemical Data Release for Idaho Primitive Area, including the contiguous Clear Creek-Upper Big Deer Creek Area, the Salmon River Breaks Primitive Area, the Sawtooth Primitive Area, and adjacent areas, central Idaho (ver. 1.2, June 2022)
This U.S. Geological Survey (USGS) data release (ver. 1.2, April 2022) contains a set of previously unpublished geochemical data from project studies of primitive areas in central Idaho, including the Clear Creek-Upper Big Deer Creek Area, the Salmon River Breaks and Sawtooth Primitive Areas, and the Gospel-Hump Wilderness Area. The purpose of the USGS Idaho Primitive Area studies, conducted fromNational Geochemical Database on Ore Deposits: Legacy data
There is a growing demand for commodities (elements, compounds, minerals) used in today's advanced technologies. Critical minerals are usually found in ore deposits that are deemed vital to economic and national security. The National Geochemical Database on Ore Deposits: Legacy data (NGDOD) contains chemistry and geologic information for nearly 30,000 historic ore and ore-related rock samples froReanalysis of Selected Archived NURE-HSSR Sediment and Soil Samples from Arizona, California, Idaho, Montana, Nevada, New Mexico, and Utah
Beginning in November of 2015, the U.S. Geological Survey (USGS) undertook a project to reanalyze approximately 60,000 archived sample splits collected as part of the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) project from selected areas in Arizona, California, Idaho, Montana, Nevada, New Mexico, and Utah. A small amount (approximately 0.Reanalysis of Additional Selected Archived NURE-HSSR Sediment Samples from Idaho and Montana
In December of 2018, the U.S. Geological Survey (USGS) signed a Technical Assistance Agreement with a third party to reanalyze 2,324 archived sample splits collected as part of the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) project from selected areas in Idaho and Montana. A small amount (approximately 0.25 grams [g]) of sieved less thanGeochemical data used in the tungsten skarn mineral resource assessment of the Great Basin region of western Nevada and eastern California
The U.S. Geological Survey (USGS) has undertaken a mineral resources assessment for tungsten for a portion of the Great Basin in parts of western Nevada and east-central California. This data release provides the Great Basin Tungsten Database: the geospatial and geologic data, and results of chemical analyses for 46,955 samples collected in the assessment area, extracted from the USGS National GeoReanalysis of Selected Archived NURE-HSSR Sediment and Soil Samples from Alaska
Selected archived sample splits collected as part of the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) program, were reanalyzed by the U.S. Geological Survey (USGS) as part of a NURE-HSSR Reanalysis project (Smith and others, 2018). A small amount (approximately 0.25 grams [g]) of sieved less than 75-micron sample material was retrieved fromGeochemical and Modal Data for Mesoproterozoic Igneous Rocks of the St. Francois Mountains, Southeast Missouri
This data release accompanies the Data Series report 'Compilation of new and previously published geochemical and modal data for Mesoproterozoic igneous rocks of the St. Francois Mountains, southeast Missouri (https://doi.org/10.3133/ds1080). The compilation includes recently acquired as well as previously published geochemical and modal petrographic data for igneous rocks in the St. Francois MounGeochemical Database for Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri, 2016-2017
The Geochemical and geologic database for Mesoproterozoic igneous rocks and iron oxide-apatite-rare earth element (IOA-REE) and iron oxide-copper-cobalt-gold (IOCG) deposits of Southeast Missouri, 2016-2017 'Geochemical Database for Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri, 2016-2017' (MO_ROCK_IOCG_REE_GX2017) contains new geochemical data compilations for saGlobal Geochemical Database for Critical Metals in Black Shales
The Global Geochemical Database for Critical Metals in Black Shales (CMIBS) contains new geochemical data compilations for fine-grained sedimentary rocks in which each geologic material sample has one 'best value' determination for each analyzed species, greatly improving speed and efficiency of use (Granitto and others, 2013). The CMIBS was created and designed to compile and integrate geochemicaOperation Basement: Missouri Precambrian Sample Database
In 1968, the Missouri Geological Survey (MGS) established the Operation Basement program to address three objectives: a) to obtain drill hole and underground mining data relative to the structure and composition of the buried Precambrian basement; b) to expand mapping in the Precambrian outcrop area and conduct research related to Precambrian geology and mineral resources; and c) to publish the re - Publications
Below are publications associated with this project.
Filter Total Items: 29GIS-based identification of areas that have resource potential for lode gold in Alaska
Several comprehensive, data-driven geographic information system (GIS) analyses were conducted to assess prospectivity for lode gold in Alaska. These analyses use available geospatial datasets of lithologic, geochemical, mineral occurrence, and geophysical data to build models for recognizing different types of gold deposits within physiographic units defined by stream drainage basins that are appAuthorsSusan M. Karl, Douglas C. Kreiner, George N. D. Case, Keith A. Labay, Nora B. Shew, Matthew Granitto, Bronwen Wang, Eric D. AndersonData release of reprocessed select National Uranium Resources Evaluation program samples in Wyoming
The U.S. Atomic Energy Commission established the National Uranium Resources Evaluation (NURE) program in 1973 to identify uranium resources throughout the United States. Part of this program focused on the collection of stream-sediment samples and subsequent geochemical analyses of these samples for uranium, in addition to 47 other elements. As part of the original program, 18,424 stream-sedimentAuthorsDavid W. Lucke, Steven M. Smith, Jaime S. Azain, Andrew David IngrahamEvaluation of the analytical methods used to determine the elemental concentrations found in the stream geochemical dataset compiled for Alaska
A recent U.S. Geological Survey data compilation of stream-sediment geochemistry for Alaska contains decades of analyses collected under numerous Federal and State programs. The compiled data were determined by various analytical methods. Some samples were reanalyzed by a different analytical method than the original, resulting in some elements having concentrations reported by multiple analyticalAuthorsBronwen Wang, Karl J. Ellefsen, Matthew Granitto, Karen D. Kelley, Susan M. Karl, George N. D. Case, Douglas C. Kreiner, Courtney L. AmundsonAlaska Geochemical Database Version 3.0 (AGDB3)—Including “Best Value” Data Compilations for Rock, Sediment, Soil, Mineral, and Concentrate Sample Media
The Alaska Geochemical Database Version 3.0 (AGDB3) contains new geochemical data compilations in which each geologic material sample has one “best value” determination for each analyzed species, greatly improving speed and efficiency of use. Like the Alaska Geochemical Database Version 2.0 before it, the AGDB3 was created and designed to compile and integrate geochemical data from Alaska to facilAuthorsMatthew Granitto, Bronwen Wang, Nora B. Shew, Susan M. Karl, Keith A. Labay, Melanie B. Werdon, Susan S. Seitz, John E. HoppeGeology and mineral resources of the North-Central Montana Sagebrush Focal Area: Chapter D in Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming
SummaryThe U.S. Department of the Interior has proposed to withdraw approximately 10 million acres of Federal lands from mineral entry (subject to valid existing rights) from 12 million acres of lands defined as Sagebrush Focal Areas (SFAs) in Idaho, Montana, Nevada, Oregon, Utah, and Wyoming (for further discussion on the lands involved see Scientific Investigations Report 2016–5089–A). The purpoAuthorsJeffrey L. Mauk, Michael L. Zientek, B. Carter Hearn, Heather L. Parks, M. Christopher Jenkins, Eric D. Anderson, Mary Ellen Benson, Donald I. Bleiwas, Jacob DeAngelo, Paul Denning, Connie L. Dicken, Ronald M. Drake, Gregory L. Fernette, Helen W. Folger, Stuart A. Giles, Jonathan M. G. Glen, Matthew Granitto, Jon E. Haacke, John D. Horton, Karen D. Kelley, Joyce A. Ober, Barnaby W. Rockwell, Carma A. San Juan, Elizabeth S. Sangine, Peter N. Schweitzer, Brian N. Shaffer, Steven M. Smith, Colin F. Williams, Douglas B. YagerByEnergy and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center, National Minerals Information CenterGeology and mineral resources of the North-Central Idaho Sagebrush Focal Area: Chapter C in Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming
SummaryThe U.S. Department of the Interior has proposed to withdraw approximately 10 million acres of Federal lands from mineral entry (subject to valid existing rights) from 12 million acres of lands defined as Sagebrush Focal Areas (SFAs) in Idaho, Montana, Nevada, Oregon, Utah, and Wyoming (for further discussion on the lands involved see Scientific Investigations Report 2016–5089–A). The purpoAuthorsKaren Lund, Lukas Zürcher, Albert H. Hofstra, Bradley S. Van Gosen, Mary Ellen Benson, Stephen E. Box, Eric D. Anderson, Donald I. Bleiwas, Jacob DeAngelo, Ronald M. Drake, Gregory L. Fernette, Stuart A. Giles, Jonathan M. G. Glen, Jon E. Haacke, John D. Horton, David John, Gilpin R. Robinson, Barnaby W. Rockwell, Carma A. San Juan, Brian N. Shaffer, Steven M. Smith, Colin F. WilliamsByEnergy and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center, National Minerals Information CenterOverview with methods and procedures of the U.S. Geological Survey mineral-resource assessment of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming: Chapter A in Mineral resources of the Sagebrush Focal Areas of Idaho, Mont
This report, chapter A of Scientific Investigations Report 2016–5089, provides an overview of the U.S. Geological Survey (USGS) Sagebrush Mineral-Resource Assessment (SaMiRA). The report also describes the methods, procedures, and voluminous fundamental reference information used throughout the assessment. Data from several major publicly available databases and other published sources were used tByEnergy and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center, National Minerals Information CenterThe geochemical atlas of Alaska, 2016
A rich legacy of geochemical data produced since the early 1960s covers the great expanse of Alaska; careful treatment of such data may provide significant and revealing geochemical maps that may be used for landscape geochemistry, mineral resource exploration, and geoenvironmental investigations over large areas. To maximize the spatial density and extent of data coverage for statewide mapping ofAuthorsGregory K. Lee, Douglas B. Yager, Jeffrey L. Mauk, Matthew Granitto, Paul Denning, Bronwen Wang, Melanie B. WerdonGeochemical reanalysis of historical U.S. Geological Survey sediment samples from the Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska
The State of Alaska’s Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska’s statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. As partAuthorsMelanie B. Werdon, Matthew Granitto, Jaime S. AzainGeochemical reanalysis of historical U.S. Geological Survey sediment samples from the Kougarok area, Bendeleben and Teller quadrangles, Seward Peninsula, Alaska
The State of Alaska’s Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska’s statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. As partAuthorsMelanie B. Werdon, Matthew Granitto, Jaime S. AzainGeochemical reanalysis of historical U.S. Geological Survey sediment samples from the Haines area, Juneau and Skagway quadrangles, southeast Alaska
The State of Alaska’s Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska’s statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. As partAuthorsMelanie B. Werdon, Matthew Granitto, Jaime S. AzainGeochemical reanalysis of historical U.S. Geological Survey sediment samples from the Tonsina area, Valdez Quadrangle, Alaska
The State of Alaska’s Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska’s statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. As partAuthorsMelanie B. Werdon, Matthew Granitto, Jaime S. Azain