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Science and Products

Map of Prairie Pothole Region

Science Team about Energy and Plains and Potholes Environments (STEPPE)

Brine Contamination to Plains and Potholes Environments from Energy Development in the Williston Basin
By
Ecosystems Mission Area, Water Resources Mission Area, Geology, Geophysics, and Geochemistry Science Center, Northern Prairie Wildlife Research Center, Northern Rocky Mountain Science Center, Wyoming-Montana Water Science Center
Science Team about Energy and Plains and Potholes Environments (STEPPE)

Science Team about Energy and Plains and Potholes Environments (STEPPE)

Brine Contamination to Plains and Potholes Environments from Energy Development in the Williston Basin
Learn More
AK aeromagnetic anomaly map

Alaska Geophysical Survey Interpretation

Available geophysical data for Alaska have not been fully exploited. Project objectives were to conduct systematic analysis of existing gravity, aeromagnetic and airborne electromagnetic data to map geologic trends, structural geologic and tectonic patterns, and identify key lithologies for direct integration with geologic framework and mineral potential studies.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Alaska Geophysical Survey Interpretation

Alaska Geophysical Survey Interpretation

Available geophysical data for Alaska have not been fully exploited. Project objectives were to conduct systematic analysis of existing gravity, aeromagnetic and airborne electromagnetic data to map geologic trends, structural geologic and tectonic patterns, and identify key lithologies for direct integration with geologic framework and mineral potential studies.
Learn More

Airborne electromagnetic and magnetic survey data, Silverton, Colorado, 2019 Airborne electromagnetic and magnetic survey data, Silverton, Colorado, 2019

Airborne electromagnetic (AEM) and magnetic survey data were collected during April and May 2019 along 1,467 line-kilometers in the San Juan-Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field. Data were acquired by Geotech, Ltd. with the versatile time-domain electromagnetic (VTEM-ET) system together with a Geometrics optically pumped cesium vapor...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data and inverted resistivity models, Cedar Rapids, Iowa, May 2017 Airborne electromagnetic and magnetic survey data and inverted resistivity models, Cedar Rapids, Iowa, May 2017

Airborne electromagnetic (AEM) and magnetic survey data were collected in collaboration with the Iowa Water Science Center for the City of Cedar Rapids to the west of Cedar Rapids, Iowa. The survey was flown between May 4 and May 5, 2017 along 347 line kilometers. Electromagnetic data were acquired using RESOLVE frequency-domain helicopter-borne electromagnetic system. Magnetic data were...
By
Geology, Geophysics, and Geochemistry Science Center

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)

Ground conductivity measurements at selected National Wildlife Refuges, Montana and North Dakota, 2017-2018 Ground conductivity measurements at selected National Wildlife Refuges, Montana and North Dakota, 2017-2018

Shallow subsurface electrical conductivity was mapped at selected U.S. Fish and Wildlife Service managed lands in northeast Montana and northwest North Dakota using the DUALEM421 electromagnetic sensor (Dualem, Inc., ON, Canada) in the winters of 2017 and 2018. Data were acquired by towing the DUALEM421 sensor on a sled behind an all-terrain vehicle or snow machine, with the sensor at a...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019 Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019

Airborne electromagnetic (AEM) and magnetic survey data were collected during April and May 2019 along 1,467 line-kilometers in the San Juan-Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field. Data were acquired by Geotech, Ltd. with the versatile time-domain electromagnetic (VTEM) system together with a Geometrics optically pumped cesium vapor...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic, magnetic, and radiometric survey, Shellmound, Mississippi, March 2018 (ver. 2.0, March 2024) Airborne electromagnetic, magnetic, and radiometric survey, Shellmound, Mississippi, March 2018 (ver. 2.0, March 2024)

Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired in late February to early March 2018 along 2,364 line-kilometers in the Shellmound, Mississippi study area. Data were acquired by CGG Canada Services, Ltd. with three different helicopter-borne sensors: the CGG Canada Services, Ltd. RESOLVE frequency-domain AEM instrument that is used to map subsurface geologic...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne Electromagnetic (AEM) Survey Inventory Airborne Electromagnetic (AEM) Survey Inventory

The U.S. Geological Survey (USGS) has been engaged in airborne electromagnetics (AEM) since the 1970s, playing a role in the development of early acquisition systems, developing calibration methods, refining standards for data acquisition, improving data processing, modeling, and interpretation methods, and expanding the range of AEM applications. However, USGS AEM survey visibility and...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

High resolution helicopter-borne magnetic and electromagnetic survey Eureka Graben area, Colorado September 1999 High resolution helicopter-borne magnetic and electromagnetic survey Eureka Graben area, Colorado September 1999

On September 25, 1998, SIAL Gosciences Inc. (SIAL) was awarded Department of Interior, contract 98CRCN1018, by the U.S. Geological Survey. This contract required SIAL to carry out a high-sensitivity magnetic and electromagnetic helicopter survey over one block located in the Eureka Graben Area near Silverton, Colorado. The primary goal of this project was to provide digitally recorded...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Big Sioux aquifer, October 2015, Sioux Falls, South Dakota Airborne electromagnetic and magnetic survey data, Big Sioux aquifer, October 2015, Sioux Falls, South Dakota

Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2015 along 769 line-kilometers over a 160-square-kilometer area that includes the Big Sioux aquifer between Sioux Falls and Dell Rapids, South Dakota, USA. Data were acquired with the CGG Resolve frequency-domain helicopter-borne electromagnetic system along with a cesium vapor magnetometer. Files...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, East Poplar Oil Field and surrounding area, October 2014, Fort Peck Indian Reservation, Montana Airborne electromagnetic and magnetic survey data, East Poplar Oil Field and surrounding area, October 2014, Fort Peck Indian Reservation, Montana

Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2014 in a 553-square-kilometer area that includes the East Poplar oil field on the Fort Peck Indian Reservation in northeastern Montana, USA. Data surround the town of Poplar and extend south into the Missouri River floodplain. Data were acquired with the SkyTEM301 transient electromagnetic helicopter...
By
Geology, Geophysics, and Geochemistry Science Center

High-resolution airborne geophysical survey of the Shellmound, Mississippi area High-resolution airborne geophysical survey of the Shellmound, Mississippi area

In late February to early March 2018, the U.S. Geological Survey acquired 2,364 line-kilometers (km) of airborne electromagnetic, magnetic, and radiometric data in the Shellmound, Mississippi study area. The purpose of this survey is to contribute high-resolution information about subsurface geologic structure to inform groundwater models, water resource infrastructure studies, and local...
By
Geology, Geophysics, and Geochemistry Science Center

Geologic map of the Inchelium Quadrangle, Stevens and Ferry counties, Washington Geologic map of the Inchelium Quadrangle, Stevens and Ferry counties, Washington

No abstract available.
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Helicopter towing a large, wire-loop contraption hanging from a cable is turning in air on a relatively clear day in Nebraska.

By
Mineral Resources Program, Communications and Publishing
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Helicopter towing a large, wire-loop contraption hanging from a cable is turning in air on a relatively clear day in Nebraska.

By
Mineral Resources Program, Communications and Publishing
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

A low-level helicopter towing a large wire-loop contraption hanging from a cable is flying straight across an open field in Nebraska on a clear day.

By
Mineral Resources Program, Communications and Publishing
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

A low-level helicopter towing a large wire-loop contraption hanging from a cable is flying straight across an open field in Nebraska on a clear day.

By
Mineral Resources Program, Communications and Publishing
Image: Northern Leopard Frog
Northern Leopard Frog
Northern Leopard Frog
Image: Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog (Rana pipiens).

By
Ecosystems, Communications and Publishing
Image: Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog (Rana pipiens).

By
Ecosystems, Communications and Publishing
Filter Total Items: 87

Deep resistivity geophysics of the San Juan–Silverton caldera complex, San Juan County, Colorado (USA) Deep resistivity geophysics of the San Juan–Silverton caldera complex, San Juan County, Colorado (USA)

Magnetotelluric (MT) and audiomagnetotelluric (AMT) data are used to better understand the subsurface geology and mineral resources in the San Juan–Silverton caldera complex located near Silverton, Colorado, western United States, as part of the extensive southern Rocky Mountains volcanic field that covers much of southwestern Colorado and northern New Mexico. Seven MT and AMT profiles...
Authors
Brian D. Rodriguez, Douglas Yager, Eric D. Anderson, Robert L. Runkel, Bennett Eugene Hoogenboom, Bruce Smith, Maria Deszcz-Pan
By
Water Resources Mission Area, Mineral Resources Program, Colorado Water Science Center, Geology, Geophysics, and Geochemistry Science Center

Geophysical data provide three dimensional insights into porphyry copper systems in the Silverton caldera, Colorado, USA Geophysical data provide three dimensional insights into porphyry copper systems in the Silverton caldera, Colorado, USA

The Silverton caldera in southwest Colorado, USA hosts polymetallic veins and pervasively altered rocks indicative of porphyry copper systems. Nearly a kilometer of erosion has exposed multiple levels of the hydrothermal systems from shallow lithocaps down to quartz-sericite-pyrite veins. New airborne electromagnetic and magnetic survey data are integrated with previous alteration...
Authors
Eric D. Anderson, Douglas Yager, Maria Deszcz-Pan, Bennett Eugene Hoogenboom, Brian D. Rodriguez, Bruce Smith
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Potential effects of energy development on environmental resources of the Williston Basin in Montana, North Dakota, and South Dakota—Water resources Potential effects of energy development on environmental resources of the Williston Basin in Montana, North Dakota, and South Dakota—Water resources

The Williston Basin has been a leading oil and gas producing area for more than 50 years. While oil production initially peaked within the Williston Basin in the mid-1980s, production rapidly increased in the mid-2000s, largely because of improved horizontal (directional) drilling and hydraulic fracturing methods. In 2012, energy development associated with the Bakken Formation was...
Authors
Timothy T. Bartos, Steven K. Sando, Todd M. Preston, Gregory C. Delzer, Robert F. Lundgren, Rochelle A. Nustad, Rodney R. Caldwell, Zell E. Peterman, Bruce D. Smith, Kathleen M. Macek-Rowland, David A. Bender, Jill D. Frankforter, Joel M. Galloway
By
Water Resources Mission Area, Wyoming-Montana Water Science Center

Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado

IntroductionThe San Juan-Silverton caldera complex located near Silverton, Colorado, in the Southern Rocky Mountains volcanic field is an ideal natural laboratory for furthering the understanding of shallow-to-deep volcanic-related mineral systems. Recent advances in geophysical data processing and three-dimensional (3D) model construction will help to characterize shallow properties...
Authors
Douglas B. Yager, Eric D. Anderson, Maria Deszcz-Pan, Brian D. Rodriguez, Bruce D. Smith
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Monitoring brine contamination using time-lapse airborne electromagnetic surveys, East Poplar Oil Field, Montana Monitoring brine contamination using time-lapse airborne electromagnetic surveys, East Poplar Oil Field, Montana

Integrated geophysical and water-quality studies have been used to delineate areas of saline groundwater in shallow unconfined aquifers underlying the East Poplar oil field in northeastern Montana. In 2004, a RESOLVE survey was conducted over the oil field to identify high conductivity areas potentially associated with brine contamination and to map the shale unit comprising the base of...
Authors
Lyndsay Ball, Maria Deszcz-Pan, Joanna Thamke, Bruce Smith
By
Geology, Geophysics, and Geochemistry Science Center, Wyoming-Montana Water Science Center

Construction of a groundwater-flow model for the Big Sioux Aquifer using airborne electromagnetic methods, Sioux Falls, South Dakota Construction of a groundwater-flow model for the Big Sioux Aquifer using airborne electromagnetic methods, Sioux Falls, South Dakota

The city of Sioux Falls is the fastest growing community in South Dakota. In response to this continued growth and planning for future development, Sioux Falls requires a sustainable supply of municipal water. Planning and managing sustainable groundwater supplies requires a thorough understanding of local groundwater resources. The Big Sioux aquifer consists of glacial outwash sands and...
Authors
Joshua F. Valder, Gregory C. Delzer, Janet M. Carter, Bruce D. Smith, David V. Smith
By
Water Resources Mission Area, Dakota Water Science Center

User’s guide for GcClust—An R package for clustering of regional geochemical data User’s guide for GcClust—An R package for clustering of regional geochemical data

GcClust is a software package developed by the U.S. Geological Survey for statistical clustering of regional geochemical data, and similar data such as regional mineralogical data. Functions within the software package are written in the R statistical programming language. These functions, their documentation, and a copy of the user’s guide are bundled together in R’s unit of sharable...
Authors
Karl J. Ellefsen, David B. Smith
By
Energy and Mineral Resources Mission Area, Water Resources Mission Area, Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Regional tectonic setting for the Trinidad earthquake swarms (2000-2012) from gravity and magnetic data Regional tectonic setting for the Trinidad earthquake swarms (2000-2012) from gravity and magnetic data

Earthquakes in the Raton basin near Trinidad, Colorado, (Figure 1) are located (Rubenstein et. al., 2014) near a major gravity and magnetic boundary. These earthquakes also occur in an area of hydrocarbon production that includes several high-capacity produced water injection wells. This presentation gives a very basic outline of the relation between the earthquakes, the potential field...
Authors
Carol A. Finn, Mason A. Kass, Bruce D. Smith
By
Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Changing migratory patterns in the Jackson elk herd Changing migratory patterns in the Jackson elk herd

Migratory behavior in ungulates has declined globally and understanding the causative factors (environmental change vs. human mediated) is needed to formulate effective management strategies. In the Jackson elk herd of northwest Wyoming, demographic differences between summer elk (Cervus elaphus) population segments have led to changes in migratory patterns over a 35-year time period...
Authors
Eric K. Cole, Aaron M. Foley, Jeffrey M. Warren, Bruce L. Smith, Sarah Dewey, Douglas G. Brimeyer, W. Sue Fairbanks, Hall Sawyer, Paul C. Cross
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Northern Rocky Mountain Science Center

Airborne electromagnetic and magnetic survey data of the Paradox and San Luis Valleys, Colorado Airborne electromagnetic and magnetic survey data of the Paradox and San Luis Valleys, Colorado

In October 2011, the U.S. Geological Survey (USGS) contracted airborne magnetic and electromagnetic surveys of the Paradox and San Luis Valleys in southern Colorado, United States. These airborne geophysical surveys provide high-resolution and spatially comprehensive datasets characterizing the resistivity structure of the shallow subsurface of each survey region, accompanied by magnetic...
Authors
Lyndsay B. Ball, Benjamin R. Bloss, Paul A. Bedrosian, V.J.S. Grauch, Bruce D. Smith
By
Geology, Geophysics, and Geochemistry Science Center

A modified procedure for mixture-model clustering of regional geochemical data A modified procedure for mixture-model clustering of regional geochemical data

A modified procedure is proposed for mixture-model clustering of regional-scale geochemical data. The key modification is the robust principal component transformation of the isometric log-ratio transforms of the element concentrations. This principal component transformation and the associated dimension reduction are applied before the data are clustered. The principal advantage of this...
Authors
Karl J. Ellefsen, David B. Smith, John D. Horton
By
Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center

USGS investigations of water produced during hydrocarbon reservoir development USGS investigations of water produced during hydrocarbon reservoir development

Significant quantities of water are present in hydrocarbon reservoirs. When brought to the land surface during oil, gas, and coalbed methane production, the water—either naturally occurring or injected as a method to enhance production—is termed produced water. Produced water is currently managed through processes such as recycling, treatment and discharge, spreading on roads...
Authors
Mark A. Engle, Isabelle M. Cozzarelli, Bruce D. Smith
By
Energy Resources Program, Geology, Energy & Minerals Science Center, Reston Biogeochemical Processes in Groundwater Laboratory

Science and Products

Map of Prairie Pothole Region

Science Team about Energy and Plains and Potholes Environments (STEPPE)

Brine Contamination to Plains and Potholes Environments from Energy Development in the Williston Basin
By
Ecosystems Mission Area, Water Resources Mission Area, Geology, Geophysics, and Geochemistry Science Center, Northern Prairie Wildlife Research Center, Northern Rocky Mountain Science Center, Wyoming-Montana Water Science Center
Science Team about Energy and Plains and Potholes Environments (STEPPE)

Science Team about Energy and Plains and Potholes Environments (STEPPE)

Brine Contamination to Plains and Potholes Environments from Energy Development in the Williston Basin
Learn More
AK aeromagnetic anomaly map

Alaska Geophysical Survey Interpretation

Available geophysical data for Alaska have not been fully exploited. Project objectives were to conduct systematic analysis of existing gravity, aeromagnetic and airborne electromagnetic data to map geologic trends, structural geologic and tectonic patterns, and identify key lithologies for direct integration with geologic framework and mineral potential studies.
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center
Alaska Geophysical Survey Interpretation

Alaska Geophysical Survey Interpretation

Available geophysical data for Alaska have not been fully exploited. Project objectives were to conduct systematic analysis of existing gravity, aeromagnetic and airborne electromagnetic data to map geologic trends, structural geologic and tectonic patterns, and identify key lithologies for direct integration with geologic framework and mineral potential studies.
Learn More

Airborne electromagnetic and magnetic survey data, Silverton, Colorado, 2019 Airborne electromagnetic and magnetic survey data, Silverton, Colorado, 2019

Airborne electromagnetic (AEM) and magnetic survey data were collected during April and May 2019 along 1,467 line-kilometers in the San Juan-Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field. Data were acquired by Geotech, Ltd. with the versatile time-domain electromagnetic (VTEM-ET) system together with a Geometrics optically pumped cesium vapor...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data and inverted resistivity models, Cedar Rapids, Iowa, May 2017 Airborne electromagnetic and magnetic survey data and inverted resistivity models, Cedar Rapids, Iowa, May 2017

Airborne electromagnetic (AEM) and magnetic survey data were collected in collaboration with the Iowa Water Science Center for the City of Cedar Rapids to the west of Cedar Rapids, Iowa. The survey was flown between May 4 and May 5, 2017 along 347 line kilometers. Electromagnetic data were acquired using RESOLVE frequency-domain helicopter-borne electromagnetic system. Magnetic data were...
By
Geology, Geophysics, and Geochemistry Science Center

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)

Ground conductivity measurements at selected National Wildlife Refuges, Montana and North Dakota, 2017-2018 Ground conductivity measurements at selected National Wildlife Refuges, Montana and North Dakota, 2017-2018

Shallow subsurface electrical conductivity was mapped at selected U.S. Fish and Wildlife Service managed lands in northeast Montana and northwest North Dakota using the DUALEM421 electromagnetic sensor (Dualem, Inc., ON, Canada) in the winters of 2017 and 2018. Data were acquired by towing the DUALEM421 sensor on a sled behind an all-terrain vehicle or snow machine, with the sensor at a...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019 Airborne electromagnetic and magnetic survey data of the San Juan-Silverton Caldera complex, Silverton, Colorado, 2019

Airborne electromagnetic (AEM) and magnetic survey data were collected during April and May 2019 along 1,467 line-kilometers in the San Juan-Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field. Data were acquired by Geotech, Ltd. with the versatile time-domain electromagnetic (VTEM) system together with a Geometrics optically pumped cesium vapor...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic, magnetic, and radiometric survey, Shellmound, Mississippi, March 2018 (ver. 2.0, March 2024) Airborne electromagnetic, magnetic, and radiometric survey, Shellmound, Mississippi, March 2018 (ver. 2.0, March 2024)

Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired in late February to early March 2018 along 2,364 line-kilometers in the Shellmound, Mississippi study area. Data were acquired by CGG Canada Services, Ltd. with three different helicopter-borne sensors: the CGG Canada Services, Ltd. RESOLVE frequency-domain AEM instrument that is used to map subsurface geologic...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne Electromagnetic (AEM) Survey Inventory Airborne Electromagnetic (AEM) Survey Inventory

The U.S. Geological Survey (USGS) has been engaged in airborne electromagnetics (AEM) since the 1970s, playing a role in the development of early acquisition systems, developing calibration methods, refining standards for data acquisition, improving data processing, modeling, and interpretation methods, and expanding the range of AEM applications. However, USGS AEM survey visibility and...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

High resolution helicopter-borne magnetic and electromagnetic survey Eureka Graben area, Colorado September 1999 High resolution helicopter-borne magnetic and electromagnetic survey Eureka Graben area, Colorado September 1999

On September 25, 1998, SIAL Gosciences Inc. (SIAL) was awarded Department of Interior, contract 98CRCN1018, by the U.S. Geological Survey. This contract required SIAL to carry out a high-sensitivity magnetic and electromagnetic helicopter survey over one block located in the Eureka Graben Area near Silverton, Colorado. The primary goal of this project was to provide digitally recorded...
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, Big Sioux aquifer, October 2015, Sioux Falls, South Dakota Airborne electromagnetic and magnetic survey data, Big Sioux aquifer, October 2015, Sioux Falls, South Dakota

Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2015 along 769 line-kilometers over a 160-square-kilometer area that includes the Big Sioux aquifer between Sioux Falls and Dell Rapids, South Dakota, USA. Data were acquired with the CGG Resolve frequency-domain helicopter-borne electromagnetic system along with a cesium vapor magnetometer. Files...
By
Geology, Geophysics, and Geochemistry Science Center

Airborne electromagnetic and magnetic survey data, East Poplar Oil Field and surrounding area, October 2014, Fort Peck Indian Reservation, Montana Airborne electromagnetic and magnetic survey data, East Poplar Oil Field and surrounding area, October 2014, Fort Peck Indian Reservation, Montana

Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2014 in a 553-square-kilometer area that includes the East Poplar oil field on the Fort Peck Indian Reservation in northeastern Montana, USA. Data surround the town of Poplar and extend south into the Missouri River floodplain. Data were acquired with the SkyTEM301 transient electromagnetic helicopter...
By
Geology, Geophysics, and Geochemistry Science Center

High-resolution airborne geophysical survey of the Shellmound, Mississippi area High-resolution airborne geophysical survey of the Shellmound, Mississippi area

In late February to early March 2018, the U.S. Geological Survey acquired 2,364 line-kilometers (km) of airborne electromagnetic, magnetic, and radiometric data in the Shellmound, Mississippi study area. The purpose of this survey is to contribute high-resolution information about subsurface geologic structure to inform groundwater models, water resource infrastructure studies, and local...
By
Geology, Geophysics, and Geochemistry Science Center

Geologic map of the Inchelium Quadrangle, Stevens and Ferry counties, Washington Geologic map of the Inchelium Quadrangle, Stevens and Ferry counties, Washington

No abstract available.
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Helicopter towing a large, wire-loop contraption hanging from a cable is turning in air on a relatively clear day in Nebraska.

By
Mineral Resources Program, Communications and Publishing
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging From a Cable

Helicopter towing a large, wire-loop contraption hanging from a cable is turning in air on a relatively clear day in Nebraska.

By
Mineral Resources Program, Communications and Publishing
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

A low-level helicopter towing a large wire-loop contraption hanging from a cable is flying straight across an open field in Nebraska on a clear day.

By
Mineral Resources Program, Communications and Publishing
Image: Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable

A low-level helicopter towing a large wire-loop contraption hanging from a cable is flying straight across an open field in Nebraska on a clear day.

By
Mineral Resources Program, Communications and Publishing
Image: Northern Leopard Frog
Northern Leopard Frog
Northern Leopard Frog
Image: Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog (Rana pipiens).

By
Ecosystems, Communications and Publishing
Image: Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog

Northern Leopard Frog (Rana pipiens).

By
Ecosystems, Communications and Publishing
Filter Total Items: 87

Deep resistivity geophysics of the San Juan–Silverton caldera complex, San Juan County, Colorado (USA) Deep resistivity geophysics of the San Juan–Silverton caldera complex, San Juan County, Colorado (USA)

Magnetotelluric (MT) and audiomagnetotelluric (AMT) data are used to better understand the subsurface geology and mineral resources in the San Juan–Silverton caldera complex located near Silverton, Colorado, western United States, as part of the extensive southern Rocky Mountains volcanic field that covers much of southwestern Colorado and northern New Mexico. Seven MT and AMT profiles...
Authors
Brian D. Rodriguez, Douglas Yager, Eric D. Anderson, Robert L. Runkel, Bennett Eugene Hoogenboom, Bruce Smith, Maria Deszcz-Pan
By
Water Resources Mission Area, Mineral Resources Program, Colorado Water Science Center, Geology, Geophysics, and Geochemistry Science Center

Geophysical data provide three dimensional insights into porphyry copper systems in the Silverton caldera, Colorado, USA Geophysical data provide three dimensional insights into porphyry copper systems in the Silverton caldera, Colorado, USA

The Silverton caldera in southwest Colorado, USA hosts polymetallic veins and pervasively altered rocks indicative of porphyry copper systems. Nearly a kilometer of erosion has exposed multiple levels of the hydrothermal systems from shallow lithocaps down to quartz-sericite-pyrite veins. New airborne electromagnetic and magnetic survey data are integrated with previous alteration...
Authors
Eric D. Anderson, Douglas Yager, Maria Deszcz-Pan, Bennett Eugene Hoogenboom, Brian D. Rodriguez, Bruce Smith
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Potential effects of energy development on environmental resources of the Williston Basin in Montana, North Dakota, and South Dakota—Water resources Potential effects of energy development on environmental resources of the Williston Basin in Montana, North Dakota, and South Dakota—Water resources

The Williston Basin has been a leading oil and gas producing area for more than 50 years. While oil production initially peaked within the Williston Basin in the mid-1980s, production rapidly increased in the mid-2000s, largely because of improved horizontal (directional) drilling and hydraulic fracturing methods. In 2012, energy development associated with the Bakken Formation was...
Authors
Timothy T. Bartos, Steven K. Sando, Todd M. Preston, Gregory C. Delzer, Robert F. Lundgren, Rochelle A. Nustad, Rodney R. Caldwell, Zell E. Peterman, Bruce D. Smith, Kathleen M. Macek-Rowland, David A. Bender, Jill D. Frankforter, Joel M. Galloway
By
Water Resources Mission Area, Wyoming-Montana Water Science Center

Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado

IntroductionThe San Juan-Silverton caldera complex located near Silverton, Colorado, in the Southern Rocky Mountains volcanic field is an ideal natural laboratory for furthering the understanding of shallow-to-deep volcanic-related mineral systems. Recent advances in geophysical data processing and three-dimensional (3D) model construction will help to characterize shallow properties...
Authors
Douglas B. Yager, Eric D. Anderson, Maria Deszcz-Pan, Brian D. Rodriguez, Bruce D. Smith
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Monitoring brine contamination using time-lapse airborne electromagnetic surveys, East Poplar Oil Field, Montana Monitoring brine contamination using time-lapse airborne electromagnetic surveys, East Poplar Oil Field, Montana

Integrated geophysical and water-quality studies have been used to delineate areas of saline groundwater in shallow unconfined aquifers underlying the East Poplar oil field in northeastern Montana. In 2004, a RESOLVE survey was conducted over the oil field to identify high conductivity areas potentially associated with brine contamination and to map the shale unit comprising the base of...
Authors
Lyndsay Ball, Maria Deszcz-Pan, Joanna Thamke, Bruce Smith
By
Geology, Geophysics, and Geochemistry Science Center, Wyoming-Montana Water Science Center

Construction of a groundwater-flow model for the Big Sioux Aquifer using airborne electromagnetic methods, Sioux Falls, South Dakota Construction of a groundwater-flow model for the Big Sioux Aquifer using airborne electromagnetic methods, Sioux Falls, South Dakota

The city of Sioux Falls is the fastest growing community in South Dakota. In response to this continued growth and planning for future development, Sioux Falls requires a sustainable supply of municipal water. Planning and managing sustainable groundwater supplies requires a thorough understanding of local groundwater resources. The Big Sioux aquifer consists of glacial outwash sands and...
Authors
Joshua F. Valder, Gregory C. Delzer, Janet M. Carter, Bruce D. Smith, David V. Smith
By
Water Resources Mission Area, Dakota Water Science Center

User’s guide for GcClust—An R package for clustering of regional geochemical data User’s guide for GcClust—An R package for clustering of regional geochemical data

GcClust is a software package developed by the U.S. Geological Survey for statistical clustering of regional geochemical data, and similar data such as regional mineralogical data. Functions within the software package are written in the R statistical programming language. These functions, their documentation, and a copy of the user’s guide are bundled together in R’s unit of sharable...
Authors
Karl J. Ellefsen, David B. Smith
By
Energy and Mineral Resources Mission Area, Water Resources Mission Area, Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Regional tectonic setting for the Trinidad earthquake swarms (2000-2012) from gravity and magnetic data Regional tectonic setting for the Trinidad earthquake swarms (2000-2012) from gravity and magnetic data

Earthquakes in the Raton basin near Trinidad, Colorado, (Figure 1) are located (Rubenstein et. al., 2014) near a major gravity and magnetic boundary. These earthquakes also occur in an area of hydrocarbon production that includes several high-capacity produced water injection wells. This presentation gives a very basic outline of the relation between the earthquakes, the potential field...
Authors
Carol A. Finn, Mason A. Kass, Bruce D. Smith
By
Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center

Changing migratory patterns in the Jackson elk herd Changing migratory patterns in the Jackson elk herd

Migratory behavior in ungulates has declined globally and understanding the causative factors (environmental change vs. human mediated) is needed to formulate effective management strategies. In the Jackson elk herd of northwest Wyoming, demographic differences between summer elk (Cervus elaphus) population segments have led to changes in migratory patterns over a 35-year time period...
Authors
Eric K. Cole, Aaron M. Foley, Jeffrey M. Warren, Bruce L. Smith, Sarah Dewey, Douglas G. Brimeyer, W. Sue Fairbanks, Hall Sawyer, Paul C. Cross
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Northern Rocky Mountain Science Center

Airborne electromagnetic and magnetic survey data of the Paradox and San Luis Valleys, Colorado Airborne electromagnetic and magnetic survey data of the Paradox and San Luis Valleys, Colorado

In October 2011, the U.S. Geological Survey (USGS) contracted airborne magnetic and electromagnetic surveys of the Paradox and San Luis Valleys in southern Colorado, United States. These airborne geophysical surveys provide high-resolution and spatially comprehensive datasets characterizing the resistivity structure of the shallow subsurface of each survey region, accompanied by magnetic...
Authors
Lyndsay B. Ball, Benjamin R. Bloss, Paul A. Bedrosian, V.J.S. Grauch, Bruce D. Smith
By
Geology, Geophysics, and Geochemistry Science Center

A modified procedure for mixture-model clustering of regional geochemical data A modified procedure for mixture-model clustering of regional geochemical data

A modified procedure is proposed for mixture-model clustering of regional-scale geochemical data. The key modification is the robust principal component transformation of the isometric log-ratio transforms of the element concentrations. This principal component transformation and the associated dimension reduction are applied before the data are clustered. The principal advantage of this...
Authors
Karl J. Ellefsen, David B. Smith, John D. Horton
By
Geology, Minerals, Energy, and Geophysics Science Center, Geology, Geophysics, and Geochemistry Science Center

USGS investigations of water produced during hydrocarbon reservoir development USGS investigations of water produced during hydrocarbon reservoir development

Significant quantities of water are present in hydrocarbon reservoirs. When brought to the land surface during oil, gas, and coalbed methane production, the water—either naturally occurring or injected as a method to enhance production—is termed produced water. Produced water is currently managed through processes such as recycling, treatment and discharge, spreading on roads...
Authors
Mark A. Engle, Isabelle M. Cozzarelli, Bruce D. Smith
By
Energy Resources Program, Geology, Energy & Minerals Science Center, Reston Biogeochemical Processes in Groundwater Laboratory
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