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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
Categories: Data;
Tags: Arkansas,
Central United States,
New Madrid,
faults,
geoscientificInformation,
Airborne geophysical surveys were conducted in the eastern Adirondacks from Dec. 7, 2015 - Dec. 21, 2015, by Goldak Airborne Surveys. The area was flown along a draped surface with a nominal survey height above ground of 200 meters. The flight line spacing was 250 meters for traverse lines and 2500 meters for control lines. Here we present downloadable magnetic and radiometric (gamma spectrometry) data from those surveys as image (Geotiff) and flight line data (csv format). Background The Eastern Adirondacks region was known for iron mining in the 1800's and 1900's but it also contains deposits of rare earth minerals. Rare earth minerals are used in advanced technology such as in cell phones, rechargeable batteries...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Adirondack Mountains,
CGGSC,
Crustal Geophysics and Geochemistry Science Center,
Essex County,
Geophysics,
Magnetic susceptibility was measured on outcropping rock in the eastern Adirondack Mountains, New York. A Terraplus KT-20 was used for the measurements. The corresponding rock type was identified using standard field geologic approaches. Locations of the outcrops were determined using a handheld GPS.
Categories: Data;
Tags: Adirondack,
Essex County,
New York,
geoscientificInformation,
magnetic susceptibility
Thirty-four ore, twenty-nine mine waste, seven host rock, two pegmatite, and one slag sample were collected from iron oxide-apatite (IOA) mines in the eastern Adirondack Highlands near Mineville and Ticonderoga, New York, from March 2016 to August 2018. The waste pile samples included twenty-five samples collected from rubble-sized mine waste piles and four samples from processed tailings piles. The ore from historic iron mines of the eastern Adirondack Highlands, New York, contain abundant quantities of rare earth element (REE)-bearing apatite crystals. These apatite crystals are especially enriched in Y, La, Ce, and Nd. In-ground ore, mine waste piles, and tailings piles could contain apatite...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Adirondack Mountains,
Energy Resources,
Geochemistry,
ICP-MS,
ICP-OES,
Airborne magnetic data are provided here as part of the data release, 'Airborne magnetic and radiometric survey, Virginia and North Carolina Fall Zone, 2021.' This website includes the processed aeromagnetic data provided in an ascii .csv file and a geoTIFF image showing the total magnetic intensity. The contractor report is available on the parent page.
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: AASG,
Amelia County,
Association of State Geologists,
Bertie County,
Brunswick County,
Airborne geophysical surveys were conducted in the eastern Adirondacks from Dec. 7, 2015 - Dec. 21, 2015, by Goldak Airborne Surveys. The area was flown along a draped surface with a nominal survey height above ground of 200 meters. The flight line spacing was 250 meters for traverse lines and 2500 meters for control lines. Here we present downloadable radiometric (gamma spectrometry) data from those surveys as flight line data (csv format) or Geotiff images. Line data (EAdirondacksSpec.csv) are presented as comma separated values with the following definitions (see technical report for details): LINE: Flight line number DATE: YYYY/MM/DD TIME: Time (UTM, 24-hour) hh:mm:ss LONG: Longitude, WGS84 (degrees) LAT:...
Categories: Data;
Tags: Adirondack Mountains,
Essex County,
New York,
United States,
aeromagnetic maps,
The grid provided here, "Levmag_UTM18N_50m.gxf", contains the magnetic anomaly after diurnal correction, IGRF removal, and leveling. Grids are in the ASCII grid exchange format (.gxf). Header information provides the grid dimensions, separation, coordinates and map projection, and z-value range information. The grid values follow. The projected coordinate system used for all grids is UTM Zone 18N: Datum: NAD83 Base Latitude: 0.00 degrees Central Meridian: -75.00 degrees False Easting: 500,000 meters False Northing: 0 meters Scale factor at natural origin: 0.9996 Detailed information regarding data collection and processing can be found in the technical report. These data should be cited as follows: Shah, A.,...
This directory contains a technical report by Sander Geophysics describing data collection and processing in detail. Note: The surveys were conducted from July 15, 2012 - July 25, 2012. The flight line spacing was 200 meters for traverse lines and 2000 meters for control lines. The area was flown along a draped surface with a nominal survey height above ground of 125 meters.
Airborne magnetic gradiometry data are provided here as part of the data release, "Airborne magnetic and radiometric survey, Charleston, South Carolina and surrounds, 2019." This data release includes the processed aeromagnetic horizontal gradiometry flight line data provided in an ascii .csv file and a geoTIFF image showing the magnetic intensity in nanoTeslas (nT). The contractor report and deliverables package are available on the parent page, https://doi.org/10.5066/P9EWQ08L. These data were collected as part of a high-resolution airborne magnetic and radiometric survey over Charleston, South Carolina and the surrounding region with a goal of better understanding earthquake hazards in the Charleston seismic...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Berkeley County,
Charleston,
Charleston County,
Clarendon County,
Colleton County,
This dataset provides location information for the airborne electromagnetic (AEM) lines across Crowleys Ridge in the New Madrid seismic zone, central US. The AEM data are interpreted and discussed in the associated publication
Categories: Data;
Tags: Arkansas,
Central United States,
GHSC,
Mississippi Alluvial Plain,
New Madrid Seismic Zone,
This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over Charleston, South Carolina and the surrounding region. These data were collected to better understand earthquake hazards in the Charleston seismic zone by imaging structural features in the crystalline basement and to image heavy mineral sands containing titanium, zirconium, and rare earth elements using radiometric data (gamma spectrometry), which is sensitive to thorium in monazite. This survey represents a collaborative effort by the U.S. Geological Survey (USGS) Earthquake Hazards Program, Mineral Resources Program, National Cooperative Mapping Program, and Earth Mapping Resource Initiative...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Berkeley County,
Charleston,
Charleston County,
Clarendon County,
Colleton County,
Radiometric methods use gamma ray spectrometry to estimate relative amounts of potassium (K), uranium (U), and thorium (Th) in the upper 0.5-1 meter of Earth's crust. Please follow links on this page to download image (GeoTiff or kmz), grid (gxf) or flight line (csv) data. Detailed information regarding data collection and processing can be found in the technical report. Initial interpretation of this dataset is provided by: Horton, J.W., Jr., Shah, A.K., McNamara, D.E., Snyder, S.L. and Carter, A.M., 2015, Aftershocks illuminate the 2011 Mineral, Virginia earthquake causative fault zone and nearby active faults, in Horton, J.W., Jr., Chapman, M.C., and Green, R.A., eds., The 2011 Mineral, Virginia earthquake...
This dataset provides line work of an interpreted revised fault network in the New Madrid seismic zone, central United States.
We present a numeric grid containing estimates of the thickness of unconsolidated sediments for the western United States. Values for these grids were combined and integrated from previous studies or derived directly from gravity analyses. The grids are provided with 1-km grid-node spacing in WGS84 latitude-longitude coordinates. Detailed information regarding the derivation of these estimates is provided by Shah, A.K, and Boyd, O.S., 2018, Depth to basement and thickness of unconsolidated sediments for the western United States - Initial estimates for layers of the U.S. Geological Survey National Crustal Model: U.S. Geological Survey Open-File Report 2018-1115, https://doi.org/10.3133/ofr20181115.
Radiometric (gamma spectrometry) measurements were made on outcropping rock and during walking surveys in the eastern Adirondack Highlands, New York using a GF Instruments Gamma Surveyor. Outcrop measurements were made over 2-minute intervals directly on rock. Walking surveys involved recording measurement averages over 30-second intervals while holding the instrument approximately 1 meter above the ground. Locations were obtained via a handheld GPS. For the outcrop measurements, rock types were identified using standard field methods. Walking surveys were conducted near magnetite-apatite deposits and in areas with mine tailings. For more information on radiometric methods, please see the International Atomic Energy...
Categories: Data;
Tags: Adirondack,
Essex County,
New York,
gamma spectrometry,
geoscientificInformation,
Note: this data release is currently being revised and is temporarily unavailable. This data release is a compilation of the locations of airborne geophysical surveys in the United States. The inventory documents public airborne geophysical surveys primarily flown by or contracted by the USGS from 1943 to present. In addition, surveys from the State of Alaska, Department of Natural Resources, Division of Geological and Geophysical Surveys (DGGS): Airborne GeophysWeb, the Bureau of Land Management, the Department of Energy and other state agencies have also been included. The surveys have contributed to studies under USGS programs including Water, Geologic Mapping, Minerals, Energy, Environmental Health, Ecosystems,...
Categories: Data,
Data Release - Under Revision;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Downloadable,
Map Service;
Tags: Alabama,
Alaska,
Arizona,
Arkansas,
California,
Airborne magnetic surveys were conducted in Oklahoma from August 11th, 2017-October 28th, 2017, by Goldak Airborne Surveys. Here we present downloadable flight line data from those surveys in comma-separated values (csv format). Three areas were flown along a draped surface with a nominal survey height above ground of 120 meters. The flight line spacing for these areas was 200 to 400 m for Area 123, in southwestern Oklahoma; 1000 m for Area 4, in northwestern Oklahoma, and 800 m for Area 5, in north-central Oklahoma. For each area control lines were flown at ten times the traverse line spacing. The surveys were flown to map subsurface geologic variations including ancient magmatic bodies, faults, and other geologic...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Airborne geophysics,
GGGSC,
Geologic framework studies,
Geology, Geophysics, and Geochemistry Science Center,
Geophysics,
Petrophysical data were collected in the eastern Adirondack Highlands during several field campaigns in 2016-2017. This data release provides magnetic susceptibility, gamma spectrometry, and density measurements on rock outcrops, hand samples, and during walking surveys. Rock types for the outcrops and samples were identified using standard field methods. Locations of the outcrops or samples were determined using a handheld GPS.
Radiometric (gamma spectrometry) measurements were made during walking surveys in northern Maine using a GF Instruments Gamma Surveyor. These surveys involved recording measurement averages over 30-second intervals while holding the instrument approximately 1 meter above the ground. Locations were obtained via a handheld GPS. Data were collected over and in the vicinity of a radiometric thorium anomaly identified via an airborne survey. For more information on radiometric methods, please see the International Atomic Energy Agency publication "Guidelines for Radioelement Mapping Using Gamma Ray Spectrometry Data" (2003). Reference: International Atomic Energy Agency, 2003, Guidelines for Radioelement Mapping Using...
Categories: Data,
Data Release - Revised;
Tags: Aroostook County,
GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
MRP,
Maine,
Airborne magnetic gradiometry data are provided here as part of the data release, "Airborne magnetic and radiometric survey, Columbia, South Carolina and surrounds, 2020." This website includes the processed aeromagnetic data provided in an ascii .csv file and a geoTIFF image showing the magnetic field intensity. The contractor report is available on the parent page. These data were collected as part of a high-resolution airborne magnetic and radiometric survey over Columbia, South Carolina and the surrounding region immediately northwest of an airborne magnetic and radiometric survey collected near Charleston, South Carolina in 2019 (Shah, 2020). Goals included imaging heavy mineral sands containing titanium,...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Aiken County,
Bamberg County,
Barnwell County,
Calhoun County,
Clarendon County,
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