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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 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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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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Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired November 2019 to March 2020 along 24,030 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP). Data were acquired by CGG Canada Services, Ltd. with three different airborne sensors: the CGG Canada Services, Ltd. TEMPEST time-domain AEM instrument that is used to map subsurface geologic structure at depths up to 300 meters (m), depending on the subsurface resistivity; a Scintrex CS-3 cesium vapor magnetometer that detects changes in deep (hundreds of meters to kilometers) geologic structure based on variations in the magnetic properties of different formations; and a Radiation Solutions RS-500 spectrometer that detects the...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Arkansas,
Arkansas River,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Geophysics, All tags...
Hydrology,
Illinois,
Louisiana,
MRVA,
Mississippi,
Mississippi Alluvial Plain,
Mississippi River,
Mississippi River Valley Alluvial aquifer,
Missouri,
New Madrid Seismic Zone,
Shellmound,
Tennessee,
U.S. Geological Survey,
USGS,
USGS Science Data Catalog (SDC),
WAUSP,
Water Availability and Use Science Program,
Water Resources,
aeromagnetic surveying,
aeroradiometric surveying,
electromagnetic surveying,
electromagnetics,
engineering sciences,
environment,
geologic structure,
geophysics,
geoscientificInformation,
geospatial datasets,
groundwater,
hydrogeology,
hydrology,
magnetic field,
magnetics,
potassium,
radiometrics,
resistivity,
thorium,
uranium,
water resources, Fewer tags
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Shallow subsurface electrical conductivity was mapped at Hansen 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 10 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 path;...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Hansen,
Montana,
NOROCK, All tags...
National Wildlife Refuge,
Northern Rocky Mountain Science Center,
Prairie Pothole Region,
STEPPE,
Science Team about Energy and Plains and Potholes Environments,
Sheridan County,
Williston Basin,
electromagnetic surveying,
electromagnetics,
environment,
geophysics,
geoscientificInformation,
groundwater,
hydrogeology,
resistivity,
salinity,
water resources, Fewer tags
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