Research Geophysicist
Geology, Geophysics, and Geochemistry Science Center
Email:
bdrenth@usgs.gov
Office Phone:
303-236-1827
Fax:
303-236-1425
ORCID:
0000-0002-3954-8124
Supervisor:
Paul A Bedrosian
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Gravity data were collected from 2006 through 2015 to assist in mapping subsurface geology in the southern San Luis Basin, northern New Mexico. This data release provides principal facts for 566 new gravity stations that were acquired to fill in gaps in the existing public gravity data coverage.
Categories: Data;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Geophysics,
Questa,
Rio Arriba County,
Taos,
Taos County, All tags...
Tres Piedras,
USGS Science Data Catalog (SDC),
bouguer anomaly,
free-air anomaly,
geoscientificInformation,
gravimeter measurement,
gravitational field (earth),
isostatic anomaly, Fewer tags
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This publication provides digital flight line data for a high-resolution magnetic survey over an area of the west-central Upper Peninsula of Michigan. The survey was flown in 2008 by Aeroquest under contract to Kennecott Eagle Minerals Company using a fixed-wing aircraft with a magnetometer mounted in a tail stinger. The USGS has obtained this 66,074 line km subset of the survey dataset for public release. Data were collected along north-south flight lines spaced 100 meters apart with east-west tie lines flown every 1000 meters. The nominal terrain clearance was 40 meters, although greater terrain clearances were required in several areas due to safety and aircraft performance considerations. Files that are available...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Raster,
Shapefile;
Tags: "Geophysics"],
Earth Mapping Resources Initiative,
EarthMRI,
Fence River,
Geology, Geophysics, and Geochemistry Science CenterGGGSC, All tags...
Ishpeming,
Keweenaw Bay,
Lake Michigamme,
MRP,
Marquette,
Michigamme Reservoir,
Michigan,
Michigan Upper Peninsula,
Mineral Resources Program,
Net River,
Ottawa National Forest,
Paint River,
Sturgeon River,
U.S. Geological Survey,
USA,
USGS,
USGS Science Data Catalog (SDC),
United States,
United States of America,
["Mineral Resources",
aeromagnetic surveying,
airborne geophysical survey,
economy,
geophysics,
geoscientificInformation,
geospatial datasets,
horizontal magnetic gradiometry,
magnetic field (earth),
vertical magnetic gradient, Fewer tags
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Gravity data were collected from 2016 through 2018 to assist in mapping subsurface geology in northeastern Iowa. This data release provides principal facts for 1080 new gravity stations that were acquired to supplement existing public gravity data coverage. References cited: Blakely, R.J., 1995, Potential Theory in Gravity and Magnetic Applications, Cambridge University Press, 441 p. International Association of Geodesy, 1971, Geodetic reference system 1967: International Association of Geodesy Special Publication No. 3, 116 p. Morelli, C., ed., 1974, the International gravity standardization net 1971: International Association of Geodesy Special Publication no.4, 194 p. Plouff, Donald, 1977, Preliminary documentation...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Benton County,
Black Hawk County,
Bremer County,
Buchanan County,
Chickasaw County, All tags...
Clayton County,
Delaware County,
Fayette County,
Geophysics,
Iowa County,
Johnson County,
Jones County,
Linn County,
Mineral Resources,
Tama County,
USGS Science Data Catalog (SDC),
bouguer anomaly,
free-air anomaly,
geoscientificInformation,
gravimeter measurement,
gravitational field (earth),
isostatic anomaly, Fewer tags
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This data release is a re-release of an airborne geophysical survey carried out for the United States Geological Survey (USGS) by Spectra Exploration Geoscience Corp., from November 2000 to February 2001. The purpose of this survey was to acquire high-resolution, high-sensitivity aeromagnetic data over an area in northeast and north-central North Dakota and assess the area for anomalies and magnetic features pertaining to the local geology. To achieve this purpose, the survey area was systematically traversed by an aircraft carrying geophysical instruments along parallel flight lines (traverses) spaced 0.25 miles (400 meters) apart in an east-west alignment. Tie lines were flown normal to the traverses spaced at...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Raster,
Shapefile;
Tags: <1GB,
Cavalier County,
Earth Mapping Resources Initiative,
EarthMRI,
Geology, Geophysics, and Geochemistry Science CenterGGGSC, All tags...
MRP,
Mineral Resources Program,
North Dakota,
Pembina County,
Ramsey County,
Spectra Exploration Geoscience Corperation,
U.S. Geological Survey,
USGS,
USGS Science Data Catalog (SDC),
United States,
United States of America,
Walsh County,
aeromagnetic surveying,
airborne geophysical survey,
economy,
geophysics,
geoscientificInformation,
geospatial datasets,
horizontal magnetic gradiometry,
magnetic field (earth),
vertical magnetic gradient, Fewer tags
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This data release includes the airborne magnetic survey data collected from the Iron Mountain-Menominee region of Michigan and Wisconsin. The Mineral Resources Program of the U.S. Geological Survey is tasked with understanding the nation's mineral resources. Precambrian rocks in the region are poorly mapped and understood. Detailed high-resolution airborne magnetic surveys, ground gravity surveys, and limited borehole data are being used to better understand the lithology and structure of both exposed and concealed Precambrian rocks. The primary goal of the airborne magnetic survey is to map lateral variations of magnetization that are related to differences in rock type.
Categories: Data;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: City of Iron Mountain,
City of Menominee,
Delaware County,
Dickinson County,
Marinette County, All tags...
Menominee County,
Michigan,
USGS Science Data Catalog (SDC),
Wisconsin,
aeromag,
aeromagnetic,
aeromagnetic surveying,
airborne magnetic survey,
geophysics,
geoscientificInformation,
geospatial datasets,
magnetic field (earth),
magnetic surveying, Fewer tags
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