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APEX Electrical Resistivity Tomography (ERT) Data and Models from 2018 Geophysical measurements and related field data were collected by the U.S. Geological Survey (USGS) at the Alaska Peatland Experiment (APEX) site in Interior Alaska from 2018 to 2020 to characterize subsurface thermal and hydrologic conditions along a permafrost thaw gradient. The APEX site is managed by the Bonanza Creek LTER (Long Term Ecological Research). Nine instrument monitoring sites (APEX1-APEX9) were established in April 2018. To quantify permafrost and thaw zone characteristics along the instrumented gradient, electrical resistivity tomography (ERT) data were collected in August 2018 along four 82 meter (m)-long transects between select sites: APEX1-3, APEX5-3, APEX5-7, and APEX6-8. Data were collected... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Disturbance, Electrical resistivity tomography, All tags... Fairbanks North Star, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, Fewer tags Transient Electromagnetic Sounding Data Collected in the San Luis Valley, Colorado near the Great Sand Dunes National Park and Preserve and the Alamosa National Wildlife Refuge (Field Seasons 2007, 2009, and 2011) Transient electromagnetic (TEM) soundings were made in the San Luis Valley, Colorado, to map the location of a blue clay unit as well as to investigate the presence of suspected faults. A total of 147 soundings were made near and in Great Sand Dunes National Park and Preserve, and an additional 6 soundings were made near Hansen Bluff on the eastern edge of the Alamosa National Wildlife Refuge. The blue clay is a significant hydrologic feature in the area that separates an unconfined surface aquifer from a deeper confined aquifer. Knowledge of its location is important to regional hydrological models. Previous analysis of well logs has shown that the blue clay has a resistivity of 10 ohm-meters or less, which is... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alamosa County, Alamosa National Wildlife Refuge, Colorado, Great Sand Dunes National Park, Great Sand Dunes National Preserve, All tags... Saguache County, San Luis Valley, TEM, USGS Science Data Catalog (SDC), aquifer, clay, clay deposits, electromagnetic surveying, fault detection, faulting (geologic), geophysics, geoscientificInformation, groundwater, subsurface mapping, subsurface maps, transient electromagnetic sounding, Fewer tags Fire impacts on permafrost in Alaska: Geophysical and other field data collected in 2014 Fire can be a significant driver 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 fire-induced change. As fire frequency is expected to increase in the high latitudes, methods to understand the vulnerability and resilience of different landscapes to permafrost degradation are needed. Geophysical and other field observations reveal details of both near-surface (<1 m) and deeper (>1 m) impacts of fire on permafrost along 11 transects that span burned-unburned boundaries in different landscape settings within interior Alaska. Data collected... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, City of Fairbanks, Disturbance, Fire, Permafrost, All tags... Tok, USGS Science Data Catalog (SDC), Vegetation, environment, geoscientificInformation, Fewer tags Titanium concentrations in stream sediments from the Atlantic Coastal Plain of the southeastern U.S. (1975-1999) The titanium concentrations were obtained from a data set that is called the "National Geochemical Survey." This data set, as well as its documentation, are available in U.S. Geological Survey Open-File Report 2004-1001 (https://mrdata.usgs.gov/geochem/doc/home.htm). The titanium concentrations were measured in 3,457 samples of stream sediments from the coastal plain of the southeastern United States; this area includes parts of Virginia, North Carolina, South Carolina, Georgia, Florida, and Alabama. The samples were collected between 1975 and 1999 during several field surveys, and the concentrations were measured using inductively coupled plasma-atomic emission spectrometry. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alabama, Atlantic Coastal Plain, CGGSC, CMERSC, Central Minerals and Environmental Resources Science Center, All tags... Crustal Geophysics and Geochemistry Science Center, Florida, Geochemistry, Georgia, MRP, Mineral Resources Program, Mineralogy, North Carolina, South Carolina, USGS Science Data Catalog (SDC), Virginia, chemical analysis, chemical elements, geochemistry, geoscientificInformation, titanium, Fewer tags Mount Baker and Mount Adams Airborne Magnetic and Electromagnetic Survey Data, August 2002, Washington, USA Hydrothermally altered rocks, particularly if water saturated, can weaken stratovolcanoes, thereby increasing the potential for catastrophic sector collapses that can lead to far-traveled, destructive debris flows, which are the largest volcanic hazards for Mount Adams and Mount Baker. Evaluating the hazards associated with such alteration is difficult because much of the alteration is obscured by ice and its depth extent is unknown. Intense hydrothermal alteration significantly reduces the resistivity and magnetization of volcanic rock and therefore hydrothermally altered rocks are identified with helicopter electromagnetic and magnetic measurements at Mount Baker and Mount Adams. High resolution magnetic and electromagnetic... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CGGSC, Crustal Geophysics and Geochemistry Science Center, Fugro Airborne Surveys, Geophysics, Mt Baker, All tags... Mt. Adams, USGS Science Data Catalog (SDC), Volcanology, Washington, aeromagnetic surveying, electromagnetic surveying, geophysics, geospatial datasets, magnetic surveying, mountain, resistivity, Fewer tags Magnetotelluric sounding data, stations 1 to 12, East-Central Tooele County, Utah, 2003 This dataset includes the magnetotelluric (MT) sounding data collected in 2003 along a north-south profile west of Tooele, Utah. 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: Archean Wyoming craton, CGGSC, Cedar Mountains, Crustal Geophysics and Geochemistry Science Center, Dugway Proving Grounds, All tags... Electromagnetic surveying, GPS measurement, Geophysics, Gold Deposits, Gold Mining, Great Basin, Great Salt Lake, Great Salt Lake Desert, Juab County, Lakeside Mountains, Lakeside Valley, MRP, MT, Magnetic field (earth), Magnetic surveying, Mineral Resources Program, Mojave province, Northern Nevada Gold Province, Onaqui Mountains, Sheeprock Mountains, Simpson Mountains, Skull Valley, Skull Valley Reservation, Stansbury Mountains, Tooele, Tooele Army Depot, Tooele County, USGS Science Data Catalog (SDC), Uinta National Forest, Utah, Utah Test and Training Range, Vernon, Wasatch National Forest, apparent resistivity, aquifer, deformation, geoscientificinformation, hydrothermal activity, impedance, impedance phase, impedance strike, localized mineralization, magmatism, magnetotelluric, regional fluid flow, sedimentation, sounding, suture zone, tipper, Fewer tags Alaska Geochemical Database Version 3.0 (AGDB3) including best value data compilations for rock, sediment, soil, mineral, and concentrate sample media The Alaska Geochemical Database Version 3.0 (AGDB3) contains new geochemical data compilations in which each geologic material sample has one best value determination for each analyzed species, greatly improving speed and efficiency of use. Like the Alaska Geochemical Database Version 2.0 before it, the AGDB3 was created and designed to compile and integrate geochemical data from Alaska to facilitate geologic mapping, petrologic studies, mineral resource assessments, definition of geochemical baseline values and statistics, element concentrations and associations, environmental impact assessments, and studies in public health associated with geology. This relational database, created from databases and published... Categories: Data, Data Release - Revised; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: AGDB, AMRAP, Alaska Geochemical Database, Alaska Mineral Resource Assessment Program, Alaska Range, All tags... Aleutian Range, Alexander Archipelago, Brooks Range, Chugach Mountains, Geochemistry, Heavy Mineral Program, Kuskokwim Mountains, Mineralogy, Praseodymium, Seward Peninsula, USGS Science Data Catalog (SDC), Wrangell Mountains, aluminum, analytical chemistry, antimony, arsenic, ash, barium, beryllium, bismuth, boron, bound or essential water, bromine, bulk density, cadmium, calcium, calcium carbonate, carbon, carbon dioxide, carbonate carbon, cerium, cesium, chemical analysis, chlorine, chromium, cobalt, copper, dysprosium, environmental geochemistry, erbium, europium, exploration geochemistry, f02013=Eastern Aleutian Islands, f02016=Western Aleutian Islands, fOC4101=Gulf of Alaska, fOC4102=Bering Sea, fUS02=Alaska, fUS=United States, ferric iron, ferrous iron, fluorine, gadolinium, gallium, geochemical data, geochemistry, geoscientificInformation, germanium, gold, hafnium, heavy-mineral concentrate chemistry, holmium, hydrogen, indium, iodine, iridium, iron, lanthanum, lead, lithium, loss on ignition, lutetium, magnesium, manganese, mercury, mineral resources, mineralogical data, mineralogy, moisture or nonessential water, molybdenum, neodymium, nickel, niobium, nitrate, nitrogen, organic carbon, osmium, pH, palladium, phosphorus, platinum, potassium, powder density, pyritic sulfur, rhenium, rhodium, rock chemistry, rubidium, ruthenium, samarium, scandium, sediment chemistry, selenium, silicon, silver, sodium, soil chemistry, strontium, sulfate, sulfide, sulfur, tantalum, tellurium, terbium, thallium, thorium, thulium, tin, titanium, total water, tungsten, uranium, vanadium, ytterbium, yttrium, zinc, zirconium, Fewer tags Geochemical analyses of surface water, groundwater and springs surrounding Mount Emmons near Crested Butte, Colorado (ver. 2.0, September 2020) The U.S. Geological Survey (USGS), Colorado Division of Reclamation, Mining and Safety (DRMS), and Coal Creek Watershed Coalition (CCWC) working independently, have intermittently collected samples of surface- and groundwater and springs around Mount Emmons, near Crested Butte, Colorado. This data release is a compilation of the comprehensive inorganic chemical analyses conducted as a result of that sampling. The earliest samples were collected in the summer of 1997, and subsequent sampling has continued through 2019. Water samples collected in the Elk Creek basin, sample identifiers starting with EC, have been previously published in three U.S. Geological Survey reports; Verplanck and others, 2007, Manning and... Categories: Data, Data Release - Revised; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CWCC, Coal Creek, Coal Creek Watershed Coalition, Colorado, Colorado Division of Reclamation, Mining and Safety, All tags... Crested Butte, DOE, DRMS, Daisy Mine, Department of Energy, Elk Creek, GGGSC, Geology, Geophysics, and Geochemistry Science Center, ICP-AES, ICP-MS, Independence Basin, Lake Irwin, MRP, Mineral Resources Program, Mount Emmons, Oh-be-joyful Creek, Peeler Basin, Red Lady Basin, Redwell Basin, Slate River, Splains Gulch, Standard Mine, State of Colorado, USGS Science Data Catalog (SDC), Wildcat Creek, Wolverine Basin, alteration, cadmium, chemical analysis, economy, geoscientificInformation, inductively coupled plasma mass spectrometry, inductively coupled plasma-atomic emission spectrometry, lead, metallic mineral resources, mineral deposits, mineralogy, water chemistry, water sampling, zinc, Fewer tags Multi-element geochemical analyses of selected samples from the Mesoproterozoic Nonesuch Formation and Copper Harbor Conglomerate at the Copperwood copper deposit, Michigan, USA This data release provides multi-element data for drill core samples from the Mesoproterozoic Nonesuch Formation and Copper Harbor Conglomerate at the Copperwood copper deposit, Michigan, USA. Gold, platinum, and palladium data were collected by fire assay; copper and silver were collected by assay; and other elements were collected by inductively coupled plasma-optical emission spectrometry (ICP-OES) or inductively coupled plasma-mass spectrometry (ICP-MS) following a digestion that used hydrochloric, nitric, perchloric and hydrofluoric acids. The Copperwood copper deposit is a sediment-hosted stratiform copper deposit in the Presque Isle Syncline of the upper peninsula of Michigan. The deposit has a 2018 mineral... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Economic Geology, Geochemistry, Mesoproterozoic, Michigan, Mineral Resources, All tags... Nonesuch Formation, USGS Science Data Catalog (SDC), United States, Upper Peninsula, aluminum, analytical chemistry, antimony, arsenic, barium, beryllium, bismuth, cadmium, calcium, chemical analysis, chromium, cobalt, copper, exploration geochemistry, gallium, geochemical data, geochemistry, geoscientificInformation, gold, iron, lead, lithium, magnesium, manganese, mercury, mineral resources, molybdenum, nickel, palladium, phosphorus, platinum, potassium, rock chemistry, scandium, silver, sodium, strontium, sulfur, tellurium, thallium, titanium, uranium, vanadium, yttrium, zinc, zirconium, Fewer tags National Geochemical Database on Ore Deposits: Legacy data There is a growing demand for commodities (elements, compounds, minerals) used in today's advanced technologies. Critical minerals are usually found in ore deposits that are deemed vital to economic and national security. The National Geochemical Database on Ore Deposits: Legacy data (NGDOD) contains chemistry and geologic information for nearly 30,000 historic ore and ore-related rock samples from mineral deposits and mining districts in the United States. Geochemical data sets from various mineral deposits were submitted by geologists of the "Systems Approach to Critical Minerals Inventory, Research, and Assessment" (SACM) within the U.S. Geological Survey Mineral Resource Program (MRP). The data sets represent... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Arizona, California, Colorado, Economic Geology, All tags... Geochemistry, Idaho, Illinois, Kentucky, Maine, Mineral Resources, Missouri, Montana, NGDB, National Geochemical Database, Nevada, New Mexico, New York, Oregon, Texas, USGS Science Data Catalog (SDC), United States, Utah, Washington, Wyoming, alkali metal elements, alkaline earth elements, aluminum, antimony, arsenic, atomic absorption analysis, atomic emission spectroscopy, barium, beryllium, bismuth, boron, bromine, cadmium, calcium, carbon, cerium, cesium, chemical analysis, chlorine, chromium, cobalt, copper, critical minerals, dysprosium, economic geology, erbium, europium, fluorine, gadolinium, gallium, geochemical data, geochemistry, geoscientificInformation, germanium, gold, hafnium, halogen elements, historic ores, holmium, igneous rocks, indium, iridium, iron, lanthanide series elements, lanthanum, lead, lithium, lutetium, magnesium, manganese, mass spectroscopy, mercury, metal elements, metallic mineral resources, metamorphic rocks, mineral deposit type, mineral deposits, mineral resources, mineral system type, molybdenum, neodymium, neutron activation analysis, nickel, niobium, nonmetal elements, nonmetallic mineral resources, osmium, oxygen, palladium, phosphorus, platinum, platinum-group elements, plutonic rocks, potassium, praseodymium, rare earth elements, rhenium, rhodium, rock geochemistry, rubidium, ruthenium, samarium, scandium, sedimentary rocks, selenium, silicon, silver, sodium, strontium, sulfur, tantalum, tellurium, terbium, thallium, thorium, thulium, tin, titanium, tungsten, uranium, vanadium, volcanic rocks, x-ray fluorescence, ytterbium, yttrium, zinc, zirconium, Fewer tags Magnetotelluric Data from the San Andreas Fault, Loma Prieta CA, 1989-1990 The U.S. Geological Survey (USGS) Geology, Geophysics and Geochemistry Science Center (GGGSC) collaborated with the USGS Science Analytics and Synthesis (SAS) team to preserve and release a subset of magnetotelluric data from the San Andreas Fault in Loma Prieta, California. The San Andreas Fault data were collected by the Branch of Geophysics, a precursor to the now GGGSC, between 1989 and 1994. The magnetotelluric data selected for this preservation project were collected in 1989 and 1990 using USGS portable truck mounted systems that measure the distribution of electrical conductivity beneath the surface of the earth. Truck mounted systems of this era output data to 3.5” discs, from which data were recovered... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, EDI, Electrical Data Interchange, Fresno County, Geology, Geophysics, and Geochemistry Science Center (GGGSC), All tags... Loma Prieta, Map Service, Mineral Resources Program (MRP), Monterey County, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, San Andreas Fault, San Andreas Fault System, USGS Science Data Catalog (SDC), electromagnetic surveying, faulting (geologic), geophysics, geoscientificInformation, legacy data, magnetotelluric sounding, magnetotelluric surveying, Fewer tags Alaska permafrost characterization: Geophysical and related field data collected in 2021 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. Electrical resistivity tomography (ERT) measurements were made along transects 110-222 meters (m) in length to quantify subsurface permafrost characteristics. ERT transects were collected across a fireline boundary within the Bonanza Creek Long Term Ecological Research (LTER) site where repeat measurements have been made since 2014; across and adjacent to two thermokarst lakes, Vault Lake and Goldstream Lake; and along two profiles at the North Star golf... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: "Climatology"], Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, All tags... Disturbance, 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, USGS Science Data Catalog (SDC), ["Geophysics", electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags Airborne magnetic and radiometric survey, Columbia, South Carolina and surrounds, 2020 This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over Columbia, South Carolina, and the surrounding region. The airborne data collection was funded by the U.S. Geological Survey (USGS) Earth Mapping Resource Initiative (Earth MRI) with goals of better understanding placer deposits containing critical mineral resources titanium, zirconium, and rare earth elements and of imaging the crystalline basement partly buried beneath Atlantic Coastal Plain sediments. The survey was flown northwest of and slightly overlapping an airborne magnetic and radiometric survey collected in 2019 (Shah, 2020). The northwestern boundary of the 2020 survey lies within the... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: <1-10GB, Aiken County, Bamberg County, Barnwell County, Calhoun County, All tags... Clarendon County, Colleton County, Columbia, Dorchester County, EHP, Earth Mapping Resources Initiative, EarthMRI, Earthquake Hazards Program, Economic Geology, Edgefield County, Fairfield County, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Kershaw County, Lee County, Lexington County, MRP, Mineral Resources, Mineral Resources Program, NCGMP, National Cooperative Geologic Mapping Program, Orangeburg County, Richland County, Saluda County, Sedimentology, Seismology, South Carolina, Structural Geology, Sumter County, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), United States, Williamsburg County, aeromagnetic surveying, aeroradiometric surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, horizontal magnetic gradiometry, potassium, thorium, uranium, Fewer tags Airborne magnetic and radiometric survey, Munsungun region in northern Maine, 2021 This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over parts of northern Maine. The airborne data collection was funded by the U.S. Geological Survey (USGS) Earth Mapping Resource Initiative (Earth MRI) with goals of better understanding volcanogenic massive sulfide mineral deposits, sediment hosted manganese deposits, and their surrounding geologic framework. Data for this survey were collected and processed by Sander Geophysics under contract with the USGS. The airborne survey took place June-July 2021. Using a fixed wing aircraft with a magnetometer mounted in a tail stinger and a fully calibrated gamma ray spectrometer, data were collected along... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: "Geophysics"], Allagash Lake, Aroostook County, Aroostook River, Bever Brook, All tags... Big Machias Lake, Carr Pond, Chamberlain Lake, Chesuncook Lake, Clear Lake, Eagle Lake, Earth Mapping Resources Initiative, EarthMRI, Fish River, Fish River Lake, Geology, Geophysics, and Geochemistry Science CenterGGGSC, Gero Island, Glazier Brook, Harrow Lake, Harvey Pond, Haymock Lake, Little Madawaska River, Longley Pondk, Loon Lake, MRP, Machias River, Maine, Mineral Resources Program, Mud Lake, Munsungun Region, Northern Maine, Penobscot County, Piscataquis County, Pleasant Lake, Portage Lake, Pratt Lake, Priestly Lake, Rocky Brook, Round Pond, Rowe Lake, Saint Froid Lake, Shallow Lake, Somerset County, Spider Lake, Squa Pan Lake, Square Lake, Third Lake, Twentyfive Mile Brook, Twin Lake, U.S. Geological Survey, USA, USGS, USGS Science Data Catalog (SDC), United States, United States of America, Webster Brook, Webster Lake, ["Economic Geology", aeromagnetic surveying, aeroradiometric surveying, airborne geophysical survey, economy, geophysics, geoscientificInformation, geospatial datasets, horizontal magnetic gradiometry, magnetic field (earth), potassium, thorium, uranium, vertical magnetic gradient, Fewer tags « 1 ... 3 4 5 6 7