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Physical properties of geologic units are important for geophysical interpretation because they provide the tie between lithology and geophysical fields. For gravity data, the applicable physical property is bulk density, which is the overall mass per unit volume of rocks, sediments, and their pore spaces. Bulk dry density is the mass per unit volume measured when the sample is dry. Saturated density is the mass per unit volume measured when the sample is saturated with fresh water, which has a density of 1,000 kg/m^3. The two values are commonly compared in order to determine the porosity of a sample, that is, the percentage of the volume that is composed of open space. Density is commonly reported in kilograms...
Categories: Data;
Types: Citation;
Tags: Arroyo Seco,
Cerro Negro,
Cerro de la Olla,
Cerro de los Taoses,
El Rito, All tags...
Geophysics,
New Mexico,
Picuris Mountains,
Pilar,
Questa,
Talpa,
Town of Taos,
Tres Piedras,
Tusas Mountains,
USGS Science Data Catalog (SDC),
bedrock geologic units,
bulk density,
geophysics,
geoscientificInformation,
gravitational field (earth),
igneous rocks,
magnetic field (earth),
magnetic susceptibility analysis,
metamorphic rocks,
porosity,
saturated density,
sedimentary rocks,
surficial geologic units, Fewer tags
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This data release provides digital flight line data for a high-resolution airborne magnetic survey over parts of Montana in the vicinity of the Boulder Batholith. The airborne survey was jointly funded by the Earth Mapping Resources Initiative and Kennecott Exploration Company. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of 34,041-line km of magnetic and radiometric data were acquired over an irregular-shaped area of 6178 km2. Data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along E-W flight lines spaced at 200 m intervals. Tie lines were flown in an N-S direction...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: AASG,
Aeromagnetic survey,
Airborne geophysical survey,
Association of State Geologists,
Boulder Mountains, All tags...
Boulder River,
Broadwater County,
Butte,
Crow Creek,
Earth Mapping Resources Initiative,
EarthMRI,
Economic Geology,
Economy,
Elkhorn Mountains,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Geophysics,
GeoscientificInformation,
Geospatial datasets,
Helena,
Jefferson County,
Lewis and Clark County,
Little Blackfoot River,
MRP,
Magnetic field (earth),
Mineral Resources,
Mineral Resources Program,
Montana,
Montana,
National Cooperative Geologic Mapping Program,
Powell County,
Prickly Pear Creek,
Sedimentology,
Structural Geology,
Twin Bridges,
U.S. Geological Survey,
USA,
USGS,
United States,
United States of America,
Whitetail Valley, Fewer tags
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This data release provides digital flight line data for a high-resolution airborne radiometric survey over parts of Montana in the vicinity of the Boulder Batholith. The airborne survey was jointly funded by the Earth Mapping Resources Initiative and Kennecott Exploration Company. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of 34,041-line km of magnetic and radiometric data were acquired over an irregular-shaped area of 6178 km2. Data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along E-W flight lines spaced at 200 m intervals. Tie lines were flown in an N-S...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: AASG,
Aeromagnetic survey,
Aeroradiometric survey,
Airborne geophysical survey,
Association of State Geologists, All tags...
Boulder Mountains,
Boulder River,
Broadwater County,
Butte,
Crow Creek,
Deerlodge National Forest,
Earth Mapping Resources Initiative,
EarthMRI,
Economic Geology,
Elkhorn Mountains,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Geophysics,
Geospatial datasets,
Helena,
Helena National Forest,
Jefferson County,
Lewis and Clark County,
Little Blackfoot River,
MRP,
Magnetic field (earth),
Mineral Resources,
Mineral Resources Program,
Montana,
Montana,
National Cooperative Geologic Mapping Program,
Potassium,
Powell County,
Prickly Pear Creek,
Sedimentology,
Structural Geology,
Thorium,
Twin Bridges,
U.S. Geological Survey,
USA,
USGS,
USGS:643ebd2bd34ee8d4ade5db65,
United States,
United States of America,
Uranium,
Whitetail Valley,
biota, Fewer tags
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This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over parts of Montana in the vicinity of the Boulder Batholith. The airborne survey was jointly funded by the Earth Mapping Resources Initiative and Kennecott Exploration Company. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of 34,041-line km of magnetic and radiometric data were acquired over an irregular-shaped area of 6178 km2. Data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along E-W flight lines spaced at 200 m intervals. Tie lines were flown...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: AASG,
Aeromagnetic survey,
Aeroradiometric survey,
Airborne geophysical survey,
Association of State Geologists, All tags...
Boulder Mountains,
Boulder River,
Broadwater County,
Butte,
Crow Creek,
Deerlodge National Forest,
Earth Mapping Resources Initiative,
EarthMRI,
Economic Geology,
Elkhorn Mountains,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Geophysics,
Geospatial datasets,
Helena,
Helena National Forest,
Jefferson County,
Lewis and Clark County,
Little Blackfoot River,
MRP,
Magnetic field (earth),
Mineral Resources,
Mineral Resources Program,
Montana,
Montana,
National Cooperative Geologic Mapping Program,
Potassium,
Powell County,
Prickly Pear Creek,
Sedimentology,
Structural Geology,
Thorium,
Twin Bridges,
U.S. Geological Survey,
USA,
USGS,
USGS:642f18b8d34ee8d4add49274,
United States,
United States of America,
Uranium,
Whitetail Valley,
biota, Fewer tags
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This data release includes the airborne magnetic survey data collected from the Manchester region of Iowa. The Mineral Resources Program of the U.S. Geological Survey is tasked with understanding the nation's mineral resources. Precambrian rocks concealed under Paleozoic sedimentary rocks in northeast Iowa 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 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: Black Hawk County,
City of Cedar Rapids,
City of Manchester,
City of Waterloo,
Delaware County, All tags...
Iowa,
Linn County,
USGS Science Data Catalog (SDC),
aeromag,
aeromagnetic,
aeromagnetic surveying,
airborne magnetic survey,
geophysics,
geoscientificInformation,
geospatial datasets,
magnetic field (earth),
magnetic surveying, Fewer tags
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