Research Geophysicist
Geology, Geophysics, and Geochemistry Science Center
Email:
bminsley@usgs.gov
Office Phone:
303-236-5718
Fax:
303-236-1425
ORCID:
0000-0003-1689-1306
Supervisor:
Christopher S Moses
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This dataset provides location information for the seismic reflection line CRmv across Crowleys Ridge in the New Madrid seismic zone, central US. The seismic reflection data are interpreted and discussed in the associated publication
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Geophysical measurements were collected by the U.S. Geological Survey (USGS) at five sites in Interior Alaska in September 2021 for the purposes of imaging permafrost structure and quantifying variations in subsurface moisture content in relation to thaw features. Borehole nuclear magnetic resonance (NMR) data were collected at two sites in order to determine liquid water content at depth in shallow boreholes. NMR data were collected in a 2.25 m-deep borehole at the North Star golf course adjacent to one of the ERT profiles, and in another two 1.625 m-deep boreholes adjacent to Big Trail Lake where previous NMR measurements were made in 2019 and 2020.
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Active layer thickness,
Alaska,
Bonanza Creek,
Borehole nuclear magnetic resonance,
Disturbance, All tags...
Electrical resistivity tomography,
Fairbanks North Star Borough,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Land Change Science Program,
LandCarbon Program,
U.S. Geological Survey,
USGS,
electrical resistivity imaging,
environment,
field monitoring stations,
geoscientificInformation,
hydrologic processes,
permafrost,
soil moisture,
soil temperature, Fewer tags
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Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired November 2018 to February 2019 along 16,816 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP). 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 structure at depths up to 100 meters, 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...
Categories: Data;
Tags: Arkansas,
Bayou Bartholomew,
Bayou Meto,
Boeuf River,
Cache River, All tags...
Coldwater River,
Crowley's Ridge,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Illinois,
L'Anguille River,
Louisiana,
MRVA,
Mississippi,
Mississippi Alluvial Plain,
Mississippi River,
Mississippi River Valley Alluvial aquifer,
Missouri,
Saint Francis River,
Tallahatchie River,
Tennessee,
WAUSP,
Water Availability and Use Science Program,
Yazoo River,
aeromagnetic surveying,
aeroradiometric surveying,
electromagnetic surveying,
electromagnetics,
engineering sciences,
environment,
geophysics,
geoscientificInformation,
geospatial datasets,
groundwater,
hydrogeology,
magnetic field,
magnetics,
radiometrics,
resistivity,
water resources, Fewer tags
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Electrical resistivity tomography (ERT) measurements were collected by the U.S. Geological Survey (USGS) at two sites in Interior Alaska in September 2019 for the purposes of imaging permafrost structure and quantifying variations in subsurface moisture content in relation to thaw features. First, ERT data were collected at Big Trail Lake, a thermokarst lake outside of Fairbanks, Alaska, to quantify permafrost characteristics beneath the lake and across its shorelines. Three 222 m ERT survey lines were collected perpendicular to the North, East, and South shorelines, and two 110 m lines were collected parallel to the southeast and northeast shorelines. Models of electrical resistivity produced from these data revealed...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Active layer thickness,
Alaska,
Big Trail Lake,
Bonanza Creek Experimental Forest,
Disturbance, All tags...
Electrical Resistivity Tomography,
Fairbanks North Star,
Fire,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Hydrologic processes,
Land Change Science Program,
Permafrost,
U.S. Geological Survey,
USGS,
electrical resistivity,
environment,
fires,
geoscientificInformation,
hydrologic processes,
permafrost,
soil moisture, Fewer tags
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Fire and hydrology can be significant drivers of permafrost change in boreal landscapes, altering the availability of soil carbon and nutrients that have important implications for future climate and ecological succession. However, not all landscapes are equally susceptible to disturbance. New methods are needed to understand the vulnerability and resilience of different landscapes to permafrost degradation. This project uses remote sensing, geophysical, and other field-based observations to reveal details of both near-surface (<1 m) and deeper (>1 m) permafrost characteristics over multiple scales. This LandCarbon project currently supports the NASA ABoVE project, 'Vulnerability of inland waters and the aquatic...
Categories: Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Alaska,
Carbon Stock,
Disturbance,
Geophysics,
Permafrost, All tags...
Remote Sensing,
Soil Carbon,
Staging, Fewer tags
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