Research Geophysicist
Geology, Geophysics, and Geochemistry Science Center
Email:
lbball@usgs.gov
Office Phone:
303-236-0133
Fax:
303-236-1425
ORCID:
0000-0002-6356-4693
Supervisor:
Burke J Minsley
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Shallow subsurface electrical conductivity was mapped at North Root National Wildlife Refuge (NWR) in northeast Montana using the DUALEM421 electromagnetic sensor (Dualem, Inc., ON, Canada) in the winter of 2017. Data were acquired by towing the DUALEM421 sensor on a sled behind an all-terrain vehicle or snow machine, with the sensor at a nominal height of 0.3 meters (m) above ground surface. Approximately 9 line-kilometers (km) of data were acquired over an area of approximately 1 square-kilometer. Data were manually edited to remove sensor dropouts, lag corrected for apparent offsets between recorded GPS location and data locations for each coil pair, and averaged to a sounding distance of 1m along the survey...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Montana,
NOROCK,
National Wildlife Refuge, All tags...
North Root,
Northern Rocky Mountain Science Center,
Prairie Pothole Region,
STEPPE,
Science Team about Energy and Plains and Potholes Environments,
Williston Basin,
electromagnetic surveying,
electromagnetics,
environment,
geophysics,
geoscientificInformation,
groundwater,
hydrogeology,
resistivity,
salinity,
water resources, Fewer tags
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Shallow subsurface electrical conductivity was mapped at Stateline National Wildlife Refuge (NWR) in northeast Montana using the DUALEM421 electromagnetic sensor (Dualem, Inc., ON, Canada) in the winter of 2017. Data were acquired by towing the DUALEM421 sensor on a sled behind an all-terrain vehicle or snow machine, with the sensor at a nominal height of 0.3 meters (m) above ground surface. Approximately 3 line-kilometers (km) of data were acquired over an area of approximately .2 square-kilometers. Data were manually edited to remove sensor dropouts, lag corrected for apparent offsets between recorded GPS location and data locations for each coil pair, and averaged to a sounding distance of 1m along the survey...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Montana,
NOROCK,
National Wildlife Refuge, All tags...
Northern Rocky Mountain Science Center,
Prairie Pothole Region,
STEPPE,
Science Team about Energy and Plains and Potholes Environments,
Stateline,
Williston Basin,
electromagnetic surveying,
electromagnetics,
environment,
geophysics,
geoscientificInformation,
groundwater,
hydrogeology,
resistivity,
salinity,
water resources, Fewer tags
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Shallow subsurface electrical conductivity was mapped at Beaver Lake National Wildlife Refuge (NWR) in northwest North Dakota using the DUALEM421 electromagnetic sensor (Dualem, Inc., ON, Canada) in the winter of 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 nominal height of 0.3 meters (m) above ground surface. Approximately 127 line-kilometers (km) of data were acquired over an area of approximately 8 square-kilometers. At this survey location, the 4m transmitter-receiver horizontal co-planar and perpendicular coil orientations did not function due to equipment malfunction. Data were manually edited to remove sensor dropouts,...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Beaver Lake,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
NOROCK,
National Wildlife Refuge, All tags...
North Dakota,
Northern Rocky Mountain Science Center,
Prairie Pothole Region,
STEPPE,
Science Team about Energy and Plains and Potholes Environments,
Williston Basin,
electromagnetic surveying,
electromagnetics,
environment,
geophysics,
geoscientificInformation,
groundwater,
hydrogeology,
resistivity,
salinity,
water resources, Fewer tags
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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 data accessibility has not advanced as rapidly as our use of the technique. This data release catalogs AEM surveys in the United States that have contributed to studies under USGS programs including Water, Geologic Mapping, Minerals, Energy, Environmental Health, Ecosystems, Hazards, and Climate. This dataset contains locations for...
Categories: Data;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Downloadable,
Map Service;
Tags: Alabama,
Arizona,
Arkansas,
California,
Colorado, All tags...
Connecticut,
Delaware,
Florida,
Geophysics,
Georgia,
Idaho,
Illinois,
Indiana,
Iowa,
Kansas,
Kentucky,
Louisiana,
Maine,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Nebraska,
Nevada,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Dakota,
Ohio,
Oklahoma,
Oregon,
Pennsylvania,
Rhode Island,
South Carolina,
South Dakota,
Tennessee,
Texas,
USGS Science Data Catalog (SDC),
United States,
Utah,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Wyoming,
electromagnetic surveying,
frequency-domain,
geophysics,
geoscientificInformation,
geospatial datasets,
resistivity,
time-domain, Fewer tags
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Airborne electromagnetic (AEM) and magnetic survey data were collected during March 2018 along 1,637 line kilometers over the western Hualapai Indian Reservation and surrounding areas. The survey was conducted as part of a study of the groundwater resources of the Truxton basin and Hualapai Plateau. The survey was designed to improve the understanding of the geometry of major hydrostratigraphic contacts of the study area. Deterministic laterally constrained inversion of the processed AEM data was conducted using the AarhusINV code (Auken and others, 2014) implemented in Aarhus Workbench software (Aarhus Geosoftware, Aarhus, Denmark). Inversion parameters were selected by running a series of test models with varying...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: AZWSC,
Arizona,
Arizona Water Science Center,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center, All tags...
Grand Canyon,
Grand Canyon West Airport,
Hualapai Indian Reservation,
Hualapai Plateau,
Hurricane Fault,
Mohave County,
Music Mountains,
Peach Springs,
Truxton,
Truxton basin,
aeromagnetic surveying,
electromagnetic surveying,
environment,
geologic structure,
geophysics,
geoscientificInformation,
geospatial datasets,
groundwater,
hydrogeology,
resistivity, Fewer tags
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