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Airborne Geophysical Surveys over the Eastern Adirondacks, New York State 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, All tags... MRP, Mineral Resources, Mineral Resources Program, New York, Remote Sensing, USGS Science Data Catalog (SDC), United States, aeromagnetic maps, aeromagnetic surveying, aeroradiometric surveying, airborne magnetics, economy, geologic mapping, geologic maps, geoscientificInformation, magnetic anomaly maps, magnetic field (earth), magnetics, mineral resources, mineral resources, subsurface imaging, subsurface maps, Fewer tags Principal facts of gravity data in the southern San Luis Basin, northern New Mexico 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 U-Pb data for: In situ LA-ICPMS U-Pb dating of cassiterite without a known-age matrix-matched reference material: Examples from worldwide tin deposits spanning the Proterozoic to Tertiary This dataset accompanies the publication, 'In situ LA-ICPMS U-Pb dating of cassiterite without a known-age matrix-matched reference material: Examples from worldwide tin deposits spanning the Proterozoic to Tertiary', published in Chemical Geology (https://doi.org/10.1016/j.chemgeo.2018.03.008), which reports a LA-ICPMS analytical procedure for dating cassiterite, a main ore mineral in tin deposits, with no need for an independently dated matrix-matched cassiterite standard. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Bolivia, Brazil, China, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, All tags... LA-ICPMS, MRP, Republic of South Africa, Russia, Saudi Arabia, Spain, U-Pb, USGS Science Data Catalog (SDC), United Kingdom, geochronology, geoscientificinformation, Fewer tags Geochemistry of ore, host rock, and mine waste pile samples of iron oxide-apatite (IOA) deposits of the eastern Adirondack Highlands, New York, in relation to potential rare earth elements resources, 2016-2018 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, All tags... Mineville, New York, Ticonderoga, USGS Science Data Catalog (SDC), WDXRF, apatite, geochemistry, iron, mine tailings, mine waste, mineral resources, rare earth elements, tailing piles, Fewer tags Airborne electromagnetic and magnetic survey data, East Poplar Oil Field and surrounding area, October 2014, Fort Peck Indian Reservation, Montana Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2014 in a 553-square-kilometer area that includes the East Poplar oil field on the Fort Peck Indian Reservation in northeastern Montana, USA. Data surround the city of Poplar and extend south into the Missouri River floodplain. Data were acquired with the SkyTEM301 transient electromagnetic helicopter-borne system together with a Geometrics G-822 magnetometer. The AEM average depth of investigation is about 80 m. The survey was flown at a nominal flight height of 30 m above terrain along north-south oriented flight lines; the majority of lines had a nominal spacing of 200 m with a sub-block area in the central portion of the oil... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CGGSC, City of Poplar, Crustal Geophysics and Geochemistry Science Center, East Poplar Oil Field, Energy Resources Program, All tags... Fort Peck Indian Reservation, Fort Peck Office of Environmental Protection, Missouri River, Montana, Poplar River, Roosevelt County, STEPPE, Science Team about Energy and Plains and Potholes Environments, USGS Science Data Catalog (SDC), WY-MTWSC, Williston Basin, Wyoming-Montana Water Science Center, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, magnetic surveying, natural gas resources, oil and gas production, oil resources, petroleum, produced waters, resistivity, salinity, Fewer tags Airborne magnetic and radiometric survey over northwest Arkansas, 2019-2020 This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over an area of northwest Arkansas. The airborne geophysical survey was jointly funded by the USGS National Cooperative Geologic Mapping Program and the Earth Mapping Resource Initiative and was designed to meet the complimentary needs related to geologic mapping and mineral resource research. The survey covers an irregular area 225 by 110 kilometer over the transition between the Ouachita and Ozarks Plateau physiographic provinces and includes 67,614 line-kilometers of magnetic and radiometric data. Data were collected from a fixed-wing aircraft flown at mean terrain clearance of 167 meters (m) above topography... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: AASG, Association of American State Geologists, Barry County, Baxter County, Boone County, All tags... Boston Mountains, Carroll County, EON Geosciences, Inc., Earth Mapping Resources Initiative, EarthMRI, Franklin County, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Independence County, Izard County, Johnson County, Lawrence County, MRP, Madison County, Marion County, Mineral Resources, Mineral Resources Program, Newton County, Ouachita Plateau, Ozarks Plateau, Pope County, Rn, Searcy County, Sharp County, Stone County, U.S. Geological Survey, USA, USGS, USGS Science Data Catalog (SDC), United States of America, Van Buren County, Washington County, aeromagnetic surveying, aeroradiometric surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, horizontal magnetic gradiometry, magnetic field (earth), potassium, radon, thorium, uranium, vertical magnetic gradient, Fewer tags Magnetotelluric sounding data, stations 26 to 36, north of Wells, Nevada, 2005 This dataset includes the magnetotelluric (MT) sounding data collected in 2005 along an east-west profile north of Wells, Nevada. It is important to know whether major mining districts in the Northern Nevada Gold Province are underlain by rocks of the Archean Wyoming craton, which are known to contain orogenic gold deposits, or by accreted rocks of the Paleoproterozoic Mojave province. It is also important to know the location and orientation of the Archean/Proterozoic suture zone between these provinces as well as major basement structures within these terranes because they may influence subsequent patterns of sedimentation, deformation, magmatism, and hydrothermal activity. This study was funded by the U.S. Geological... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bishop Creek, CGGSC, Crustal Geophysics and Geochemistry Science Center, Electromagnetic surveying, Elko County, All tags... GPS measurement, Geophysics, Geophysics, Gold Deposits, Gold Mining, Humboldt River, MRP, MT, Magnetic field (earth), Magnetic surveying, Marys River, Mineral Resources Program, Montello, Nevada, North Fork Humboldt River, Northern Nevada Gold Province, Oasis, Snake Mountains, Tabor Creek, USGS Science Data Catalog (SDC), Wells, Wilkins, Windermere Hills, apparent resistivity, aquifer, geoscientificinformation, impedance, impedance phase, impedance strike, magnetotelluric, sounding, suture zone, tipper, Fewer tags Whole rock, soil, sediment, x-ray diffraction, and electron microprobe analyses of samples from the Orange Hill-Bond Creek area, Nabesna Quadrangle, Alaska This data release includes geochemical, x-ray diffraction mineralogical, and electron probe microanalysis (EPMA) data on rocks, soils, and sediments collected near the Orange Hill and Bond Creek porphyry copper deposits, Nabesna quadrangle, Alaska. Geochemical analyses were completed by a laboratory under contract with the U.S. Geological Survey (USGS). Electron microprobe and x-ray diffraction mineralogical analyses were completed by personnel of the Central Region Minerals Program in Denver, Colorado. The samples were collected and analyzed during 2014 to 2016, selected to help characterize the distribution and composition of mineralized and unmineralized geologic materials in this remote part of the eastern Alaska... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Alaska Range, Alder Gulch, Bond Creek, Chathenda Creek, All tags... EPMA, Geochemistry, Gold Hill, Mineralogy, Nabesna, Nabesna A-2 quadrangle, Nabesna A-4 quadrangle, Nabesna B-4 quadrangle, Nikonda Creek, Nutzotin Mountains, Orange Hill, Red Hill Creek, USGS Science Data Catalog (SDC), Valdez-Cordova County, Wrangell Mountains, Wrangell–Saint Elias National Preserve, XRD, airborne imaging spectroscopy, chemical analysis, copper, economy, electron probe micronanalysis, geochemistry, geoscientificInformation, hyperspectral, hyperspectral imaging, mineral resources, mineralogy, porphyry copper, rock, rock geochemistry, soil, soil chemistry, soil geochemistry, stream sediment, unconsolidated deposits, x-ray diffraction, Fewer tags Magnetotelluric survey to characterize the Sunnyside Porphyry Copper System in the Patagonia Mountains, Arizona This dataset includes the magnetotelluric (MT) sounding data collected in 2008 in and near the Patagonia Mountains of Arizona. The U.S. Geological Survey (USGS) conducted a series of multidisciplinary studies as part of the Assessment Techniques for Concealed Mineral Resources project funded by the USGS Minerals Resources Program in cooperation with the U.S. Forest Service. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arizona, CGGSC, Crustal Geophysics and Geochemistry Science Center, Cumero Canyon, Electromagnetic surveying, All tags... GIS, GPS measurement, Geophysics, Harshaw, MRP, MT, Magnetic field (earth), Magnetic surveying, Mineral Resources Program, Mount Hughes, Patagonia, Patagonia Mountains, San Rafael Valley, San Rafael Valley porphyry copper system, Santa Cruz County, Sunnyside porphyry copper system, Time series, USGS Science Data Catalog (SDC), apparent resistivity, aquifer, geographic information systems, geoscientificinformation, geospatial dataset, groundwater, hydrogeology, impedance, impedance phase, impedance strike, magnetotelluric, sounding, tipper, Fewer tags Magnetotelluric sounding data, stations 1-9, Taos Plateau Volcanic Field, New Mexico, 2009 This dataset includes the magnetotelluric (MT) sounding data collected in 2009 in and near the San Luis Basin, New Mexico. The U.S. Geological Survey conducted a series of multidisciplinary studies, including MT surveys, in the San Luis Basin to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. The shallow unconfined and the deeper confined Santa Fe Group aquifers in the San Luis Basin are the main sources of municipal water for the region. The population of the San Luis Basin region is growing rapidly and water shortfalls could have serious consequences. Future growth and land management... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CGGSC, Cerro, Crustal Geophysics and Geochemistry Science Center, Electromagnetic surveying, GPS measurement, All tags... Geophysics, Geophysics, MRP, MT, Magnetic field (earth), Magnetic surveying, Mineral Resources Program, New Mexico, Questa, Rocky Mountains, San Luis Valley, Taos, Taos County, Tres Piedras, USGS Science Data Catalog (SDC), apparent resistivity, aquifer, geoscientificinformation, groundwater, hydrogeology, impedance, impedance phase, impedance strike, magnetotelluric, sounding, tipper, Fewer tags Data for a Comprehensive Survey of Fault Zones, Breccias, and Fractures in and Flanking the Eastern Española Basin, Rio Grande Rift, New Mexico This release provides the data for a comprehensive survey of geologic structures in the eastern Española Basin of the Rio Grande rift, New Mexico. The release includes data and analyses from 53 individual fault zones and 22 other brittle structures, such as breccia zones, joints, and veins, investigated at a total of just over 100 sites. Structures were examined and compared from poorly lithified Tertiary sediments, as well as Paleozoic sedimentary and Proterozoic crystalline rocks. Data and analyses, include geologic maps; field observations and measurements; orientation, kinematic paleostress analyses and modeling; statistical examination of 575 fault trace lengths derived from aeromagnetic data in the Española... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CGGSC, Crustal Geophysics and Geochemistry Science Center, Deformation (geologic), Faulting (geologic), Fracture (geologic), All tags... GECSC, Geochemistry, Geologic structure, Geological Survey National Cooperative Geologic Mapping Program, Geology, Geophysics, Geosciences and Environmental Change Science Center, Laramide orogeny, MRP, Mineral Resources Program, Mineralogy, Mineralogy, NCGMP, New Mexico, Rio Grande rift, Santa Fe, Santa Fe County, Structural geology, Tectonic processes, USGS Science Data Catalog (SDC), Water Resources, X-ray diffraction, breccias, fault geochemistry, fault kinematics, fault length, fault rocks, fault structure, geoscientificInformation, impactites, Fewer tags Alaska permafrost characterization: Geophysical and related field data collected from 2016-2017 Electrical resistivity tomography (ERT), downhole nuclear magnetic resonance (NMR), and manual permafrost-probe measurements were used to quantify permafrost characteristics along transects within several catchments in interior Alaska in late summer 2016 and 2017. Geophysical sites were chosen to coincide with additional soil, hydrologic, and geochemical measurements adjacent to various low-order streams and tributaries in a mix of burned and unburned watersheds in both silty and rocky environments. Data were collected in support of the Striegl-01 NASA ABoVE project, "Vulnerability of inland waters and the aquatic carbon cycle to changing permafrost and climate across boreal northwestern North America." Additional... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Borehole nuclear magnetic resonance, Disturbance, Fire, All tags... GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrologic processes, Organic layer thickness, Permafrost, Resistivity profiling, Soil Sciences, Soils, USGS Science Data Catalog (SDC), environment, fires, geoscientificInformation, hydrologic processes, permafrost, resistivity, soil moisture, Fewer tags Airborne magnetic and radiometric survey, Ironton, Missouri area This publication provides digital flight line data for a high-resolution horizontal magnetic gradient and radiometric survey over the Ironton, Missouri area of southeast Missouri. Data were collected using a fixed wing aircraft with magnetometers mounted in the tail stinger and each wing tip pod and a fully calibrated gamma ray spectrometer. The survey operated out of the Farmington, Missouri airport during January to mid-February of 2016. The survey covers an irregularly shaped region within a 54 x 53 square-kilometer area centered on the town of Ironton, Missouri. Data were collected along north-south flight lines spaced 300 meters (m) apart with east-west tie lines flown every 3000 m. A mean terrain clearance... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: CGGSC, Cedar Hill, Crustal Geophysics and Geochemistry Science Center, Iron Mountain, Ironton, All tags... MRP, Mineral Resources Program, Missouri, Pilot Knob, Shepard Mountain, USGS Science Data Catalog (SDC), aeromagnetic surveying, aeroradiometric surveying, geophysics, geoscientificInformation, geospatial datasets, magnetic field (earth), magnetic surveying, Fewer tags Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018 This data release includes audiomagnetotelluric (AMT) sounding data collected in July 2018 in the Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field, by the U.S. Geological Survey (USGS). Along with geologic mapping, airborne magnetics, airborne electromagnetics, and magnetotellurics, the USGS collected AMT data at 24 sites along four profiles ranging from 3 to 6 kilometers in length across the north-western structural margin of the Silverton caldera in Mineral Basin (MB01-MB05), across the south-eastern margin of the caldera along Cunningham Creek (CC01-CC05), within the caldera in Eureka Graben (EG01-EG05), and within the caldera along upper Cement Creek near the Gold King mine... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: "San Juan" County, AMT, Colorado, Environmental Health, GGGSC, All tags... GPS measurement, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrogeology, MRP, MT, Mineral Resources Program, Mineralogy, Silverton, USGS Science Data Catalog (SDC), Volcanology, Water Quality, apparent resistivity, audiomagnetotelluric, economy, electric field (earth), geophysics, impedance, impedance phase, impedance strike, magnetic field (earth), magnetotelluric, magnetotelluric surveying, sounding, tipper, Fewer tags Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, November 2018 - February 2019 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; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arkansas, Bayou Bartholomew, Bayou Meto, Boeuf River, Cache River, All tags... Coldwater River, Crowley's Ridge, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrology, Illinois, L'Anguille River, Louisiana, MRVA, Mississippi, Mississippi Alluvial Plain, Mississippi River, Mississippi River Valley Alluvial aquifer, Missouri, Saint Francis River, Tallahatchie River, Tennessee, USGS Science Data Catalog (SDC), WAUSP, Water Availability and Use Science Program, Water Resources, 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 Magnetotelluric sounding locations, stations 1 to 22, Southern San Luis Valley, Colorado, 2006 This dataset includes the locations of magnetotelluric (MT) stations collected in 2006 in the Southern San Luis Valley, Colorado. The U.S. Geological Survey conducted a series of multidisciplinary studies, including MT surveys, in the San Luis Valley to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. The shallow unconfined and the deeper confined Santa Fe Group aquifers in the San Luis Basin are the main sources of municipal water for the region. The population of the San Luis Valley region is growing rapidly and water shortfalls could have serious consequences. Future growth and land... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Colorado, Costilla County, Electromagnetic surveying, GIS, GPS measurement, All tags... Geophysics, MT, Magnetic field (earth), Magnetic surveying, Rocky Mountains, San Luis Valley, USGS Science Data Catalog (SDC), apparent resistivity, geographic information systems, geoscientificinformation, geospatial dataset, impedance, impedance phase, impedance strike, magnetotelluric, sounding, tipper, Fewer tags U-Pb data for: U-Pb geochronology of tin deposits associated with the Cornubian Batholith of southwest England: Direct dating of cassiterite by in situ LA-ICPMS Cassiterite (SnO2) samples were collected throughout Devon and Cornwall Counties in southwest England, United Kingdom. Samples were prepared and analyzed for direct age dating on a laser ablation inductively coupled plasma mass spectrometer (LA-ICPMS) system at the U.S. Geological Survey in Denver, Colorado in February and April 2018. This data release accompanies the publication, 'U-Pb geochronology of tin deposits associated with the Cornubian Batholith of southwest England: Direct dating of cassiterite by in situ LA-ICPMS' (Moscati and Neymark, in press). The publication describes a greater chronologic control and refinement of Cornubian tin ore deposition and allows comparison of its timing with previously published... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Cornwall, Devon, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, LA-ICPMS, All tags... MRP, U-Pb, USGS Science Data Catalog (SDC), United Kingdom, cassiterite, geochronology, geochronology, geoscienceinformation, geoscientificInformation, laser ablation inductively coupled plasma mass spectrometer, lead, lead, thorium, thorium, uranium, uranium, Fewer tags Geochemical analyses of rock samples collected from mineral deposits and intrusions of the Bokan Mountain peralkaline granitic complex, Prince of Wales Island, southeastern Alaska This data set compiles the major and trace element chemistry of rock samples collected by the U.S. Geological Survey (USGS) at Bokan Mountain, located in the southern part of Prince of Wales Island, southeastern Alaska. Bokan Mountain was formed by an Early Jurassic peralkaline igneous complex that intruded into lower Paleozoic rocks of the Alexander terrane of southeast Alaska. The pluton and surrounding country rocks host numerous mineral deposits and occurrences, including heavy rare earth element (HREE)-rich pegmatites and felsic dikes, as well as mineral deposits rich in uranium, thorium, HREE, and fluorine. The Ross-Adams mine on Bokan Mountain exploited a uranium-thorium deposit intermittently from the late... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Alexander terrane, Bokan Mountain, Energy Resources, Exploration, All tags... Geochemical surveys, Geochemistry, Geochemistry, Igneous rocks, Jurassic, MRP, Mesozoic, Mineral Resources Program, Mineral deposits, Prince of Wales Island, Prospecting, Rare Earth Elements, Southeast Alaska, USA, USA, USGS Science Data Catalog (SDC), United States of America, Uranium, geoscientificinformation, Fewer tags Magnetotelluric sounding locations, stations 23 to 46, San Luis Valley, Colorado, 2007 This dataset includes the magnetotelluric (MT) sounding data collected in 2007 in and near the San Luis Valley, Colorado. The U.S. Geological Survey conducted a series of multidisciplinary studies, including MT surveys, in the San Luis Valley to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. The shallow unconfined and the deeper confined Santa Fe Group aquifers in the San Luis Basin are the main sources of municipal water for the region. The population of the San Luis Valley region is growing rapidly and water shortfalls could have serious consequences. Future growth and land management... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alamosa County, Baca National Wildlife Refuge, CGGSC, Colorado, Conejos County, All tags... Costilla County, Crustal Geophysics and Geochemistry Science Center, Electromagnetic surveying, GPS measurement, Geophysics, Great Sand Dunes National Park, MRP, MT, Magnetic field (earth), Magnetic surveying, Mineral Resources Program, New Mexico, Rio Grande rift, Rocky Mountains, Saguache County, San Luis Basin, San Luis Valley, Sandoval County, Santa Fe County, USGS Science Data Catalog (SDC), apparent resistivity, aquifer, geoscientificinformation, groundwater, hydrogeology, impedance, impedance phase, impedance strike, magnetotelluric, sounding, tipper, Fewer tags Geochemical data for stream water and stream sediment samples from the northeast part of the Tanacross quadrangle, Alaska This data release is part of a study designed to test geochemical methods that best delineate known mineral deposits in the northeast part of the Tanacross 1° x 3° quadrangle, within the Yukon-Tanana Upland region, Alaska. The total area sampled is about 3,200 km2. Extensive tundra cover and patchy spruce/alder vegetation and very limited outcrop exposure characterize the area. Soils and stream sediments contain mixtures of weathered bedrock, sand derived from dunes developed during the Pleistocene, and volcanic ash deposits from the 1.2 Ky eruption of the nearby Mount Churchill volcano. Several mineral deposits are known in the area, including the Late Cretaceous to earliest Tertiary porphyry Cu (+/-Mo-Au) deposits... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Bluff, Economic Geology, Economic geology, Fishhook, All tags... GGGSC, Geochemistry, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, Hydrology, ICP-MS, Late Cretaceous, Liberty, MRP, McCord Creek, McElfish Creek, Metallic mineral resources, Mineral Resources, Mineral Resources Program, Mineral resources, Mount Churchill, Oreo, Pika, Pika Canyon, Pleistocene, Pushbush, Taurus, USGS Science Data Catalog (SDC), Yukon-Tanacross Upland, chemical analysis, geoscientificInformation, inductively coupled plasma mass spectrometry, mineral deposit, water chemistry, Fewer tags 1 2 »