Alaska permafrost characterization: Borehole Nuclear Magnetic Resonance (NMR) 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. Borehole nuclear magnetic resonance (NMR) data were collected at two sites in order to determine liquid water content at depth in shallow boreholes. NMR data were collected in a 2.25 m-deep borehole at the North Star golf course adjacent to one of the ERT profiles, and in another two 1.625 m-deep boreholes adjacent to Big Trail Lake where previous NMR measurements were made in 2019 and 2020.

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, Disturbance, All tags... 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, electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags

Eagle Airborne Magnetic and Radiometric Geophysical Survey

The Eagle airborne magnetic and radiometric geophysical survey covers parts of the Charley River, Eagle, and Tanacross quadrangles near Eagle, Alaska (fig. 1). Magnetic and radiometric data were collected with a fixed-wing aircraft May 24 to June 27, 2021 by MPX Geophysics LTD. A total of 26,926 line kilometers were collected covering 9,731 square kilometers. The magnetometer was mounted to a rear-facing fixed boom (tail stinger). The radiometric crystals were located in the cabin of the aircraft. The Eagle survey was flown with a line spacing of 400 meters (m) and a mean ground clearance of 330 m. The data, as well as additional metadata, are available from the DGGS website: https://doi.org/10.14509/30755. USGS...

Categories: Data; Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Alder Creek, Alma Creek, American Creek, Anaconda Creek, Analytic Signal, Arctic Creek, Arctic Dome, Arkansas Creek, Aurora Creek, Barney Creek, Bear Creek, Ben Creek, Black Diamond Creek, Bluff Creek, Bonanza Creek, Boulder Creek, Boundary Creek, Bow Creek, Broken Neck Creek, Bryan Creek, Bryant Creek, Buck Creek, Buckeye Creeek, Buckeye Creek, Buckskin Creek, Bullion Creek, Butte Creek, Calico Bluff, Canyon Creek, Caribou Creek, Cassiar Creek, Castalia Creek, Cedar Creek, Champion Creek, Chicago Boy Creek, Clifford Creek, Colorado Creek, Columbia Creek, Comet Creek, Confederate Creek, Copper Creek, Crab Creek, Cripple Creek, Crooked Creek, Crowley Creek, Curtis Bar Creek, DGGS, Deadman Island, Deep Creek, Deer Creek, Dewey Creek, Diamond Fork, Dick Dale Creek, Dime Creek, Discovery Creek, Discovery Fork, Dome Creek, Dominion Creek, Eagle, Eagle Bluff, Eagle Creek, Easter Creek, Eldorado Creek, Enterprise Creek, Eva Creek, Excelsior Creek, Exploration, Fish Creek, Flat Creek, Flume Creek, Ford Lake, Fortymile Dome, Fortymile River, Fox Creek, Geologic, Geology, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Georgie Creek, Gillman Creek, Glacier Mountain, Glenn Creek, Gold Bottom Creek, Gold Creek, Granite Creek, Green Creek, Gridded Data, Happy New Year Creek, Hilda Creek, Hutchinson Creek, Independence Creek, Iron Creek, Jim Creek, John Shedd Creek, Joseph, Joseph Creek, Kechumstuk Creek, King Creek, King Solomon Creek, Last Chance Creek, Line Data, Logan Creek, Lost Creek, Lousy Creek, Magnetic Data, Magnetic Survey, Magnetics, Manila Creek, Mariner Creek, Marion Creek, Merry Christmas Creek, Michigan Creek, Mineral Resources, Mission Creek, Missoula Creek, Mogul Creek, Molly Creek, Montana Creek, Moose Creek, Mosquito Fork, Mount Eldridge, Mount Harper, Mount Veta, Mount Warbelow, My Creek, North Peak, Norvell Creek, Nugget Creek, Ole Creek, Oregon Creek, Our Creek, Pennsylvania Creek, Phoenix Creek, Pittsburgh Creek, Placer Creek, Polly Creek, Portage Creek, Powee Creek, Quartz Creek, Queen of Sheba Creek, Remote Sensing, Rock Creek, Ruby Creek, Sam Patch Creek, Seventymile, Seventymile River, Seward Creek, Shade Creek, Sheba Mountain, Silver Bow Creek, Sinnott Creek, Slate Creek, Smith Creek, Snow Creek, Sonickson Creek, South Boundary Creek, Steele Creek, Strawberry Dome, Surprise Creek, Telegraph Creek, Thurston Creek, Trail Creek, Twin Creek, USGS Science Data Catalog (SDC), Union Creek, Utah Creek, Van Milligan Creek, Veta Creek, Wallcutt Mountain, Washington Creek, Willow Creek, Wilson Creek, Wolf Creek, Yukon River, Yukon-Tanana Upland, geoscientificInformation, Fewer tags

Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska

Re-analyses of sample pulps and bulk rejects from historic USBM rock and heavy-mineral-concentrate samples were conducted by the Alaska Division of Geological & Geophysical Surveys (DGGS) as part of the State of Alaska's Strategic and Critical Minerals Assessment project, which is designed to evaluate Alaska's potential for these resources. The objective of this resource assessment is to expand the state's geochemical database by obtaining and publishing modern, quantitative geochemical analyses for historic USBM samples, where available. Highlights of this re-analysis project include heavy mineral concentrates with up 7,220 ppm Sn, 5,870 ppm Cr, and 17,000 ppm Mn.

Tags: Aluminum, Antimony, Arsenic, Barium, Basalt, All tags... Base Metals, Beaver Quadrangle, Bedrock, Beryllium, Bettles Quadrangle, Bismuth, Bonanza Creek, Cadmium, Calcium, Caribou Mountain, Cerium, Cesium, Chlorite, Chromium, Coal Creek, Cobalt, Copper, Critical Minerals, Dall River, Dalton Highway, Dysprosium, Economic Geology, Erbium, Europium, Exploration, Felsic, Fish Creek, Fluorine, Fort Hamlin Hills, Gadolinium, Galena, Gallium, Geochemical Data, Geochemical Surveys, Geochemistry, Germanium, Gobblers Knob, Gold, Granite, Greisen, Hafnium, Heavy Metals, Holmium, Igneous Rocks, Iron, Ishtalitna Creek, Kanuti Hot Springs, Kanuti Kilolitna River, Kanuti River, Kilo Hot Springs, Koyukuk Mining District, Lanthanide Elements, Lanthanum, Livengood Quadrangle, Lode, Lower Ray Hot Springs, Lutetium, Magnesium, Manganese, McQuesten Creek, Metabasite, Metals, Metamorphic Rocks, Metasedimentary rocks, Metavolcanic rocks, Mineral Assessment, Mineral Deposit, Mineral Resources, Molybdenum, Monazite, Mount Henry Eakin, Mount Tozi, Neodymium, Nickel, Niobium, No Name Creek, Non-Metals, Palladium, Pan Concentrates, Phosphorus, Placer, Placer Gold, Platinum, Platinum Group Elements, Potassium, Praseodymium, Precious Metals, Promethium, Prospect Creek, Rare Earth Elements, Ray Mountains, Ray River, Ray River Hot Springs, Ree, Resource Assessment, Resources, Rubidium, Samarium, Scheelite, Schist, Selenium, Silica, Silver, Sithylemenkat Lake, Sodium, Sphalerite, Strategic Minerals, Stream Sediments, Strontium, Sulfides, Sulfur, Tanana Quadrangle, Tantalum, Thallium, Thorium, Tin, Titanium, Tokusatatquaten Lake, Torment Creek, Tourmaline, Trace Elements, Trace Geochemical, Trace Metals, Trans-Alaska Pipeline, Tungsten, Upper Ray Hot Springs, Uranium, Vanadium, Ytterbium, Zeunerite, Zinc, Zirconium, geoscientificInformation, Fewer tags

Liberty Bell area, western Bonnifield mining district, electromagnetic and magnetic airborne geophysical survey, data compilation

This publication, GPR 2017-1, provides geophysical data produced from an airborne geophysical survey conducted in 2001 and released in 2002 for 276 sq miles of the Liberty Bell area, western Bonnifield mining district, central Alaska. Aeromagnetic and electromagnetic data were acquired during the survey. During 2016, the same digital data were reformatted for ease of use with modern processing tools; vector shapefiles and the analytic signal and calculated first vertical derivative grids were added. Other than the creation of calculated grids, no new processing was done. Data provided in GPR 2017-1 include processed (1) linedata ASCII databases, (2) gridded files of magnetic and resistivity data, (3) vector files...

Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Airborne Geophysical Survey, All tags... Alaska, State of, Apparent Resistivity Data, Apparent Resistivity Map, Apparent Resistivity Survey, Bonanza Creek, Bonnifield Mining District, Buzzard Creek, California Creek, Chicken Creek, Coal Creek, Cody Creek, DIGHEM-V EM System, Daniels Creek, Digital Elevation Model, Eagle Creek, Electromagnetic Anomalies, Electromagnetic Data, Electromagnetic Survey, Elsie Creek, Emma Creek, Eva Creek, Fairbanks Quadrangle, First Vertical Derivative, Fourth of July Creek, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Homestake Creek, Iron Creek, Liberty Bell Mine, Little Moose Creek, Lynx Creek, Magnetics, Marguerite Creek, McAdam Creek, Resistivity, Resistivity Survey, Rex Creek, Rex Dome, Saint Charles Creek, Spruce Creek, Steep Creek, Wilson Creek, Winter Creek, geoscientificInformation, Fewer tags

APEX Soil Temperature and Moisture Data from 2018-2020

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). In July 2018, soil temperature and moisture sensors were installed at six out of the nine instrument locations (APEX1, APEX2, APEX3, APEX4, APEX7, APEX9). Thermistors (PS103J2, US Sensor, Orange, CA, USA) were placed at depths of 5, 30, 60, 120, and 180 centimeters (cm) with three replicates. Three sites (APEX1, APEX4, APEX9) contained an additional single...

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Bonanza Creek, Disturbance, Fairbanks North Star, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags

APEX Borehole Nuclear Magnetic Resonance (NMR) Data and Models from 2018-2020

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 sites were established in April 2018, seven of which were given a borehole approximately 2.3 meters (m) deep for repeat nuclear magnetic resonance (NMR) logging to quantify unfrozen water content and soil properties in the near surface. NMR data were collected from each borehole a total of ten times between April 2018 and October 2020, at a...

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, Disturbance, All tags... Fairbanks North Star, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, Fewer tags

APEX Thaw Depth Data from 2018-2019

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 sites were established in April 2018 and initially comprised a buried seismic station for continuous passive recording of the seismic wavefield, and seven of the nine sites were given a borehole for repeat nuclear magnetic resonance (NMR) logging. Between June 2018 and September 2019, measurements of active-layer thaw depth were regularly recorded...

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Disturbance, Fairbanks North Star, All tags... GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, Fewer tags

Alaska permafrost characterization: Electrical Resistivity Tomography (ERT) 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 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 course...

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, Disturbance, All tags... 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), electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags

Permafrost characterization at the Alaska Peatland Experiment (APEX): Geophysical and related field data collected from 2018-2020

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). In April 2018, seven boreholes were emplaced to depths of 2.3-2.5 meters (m) to allow for repeat logging with downhole nuclear magnetic resonance (NMR) to quantify the spatial and temporal variations in unfrozen water content within active-layer and permafrost soils. NMR data were collected on ten separate occasions between April 2018 and October 2020. In June...

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, Disturbance, All tags... Electrical resistivity tomography, Fairbanks North Star, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags

Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and streams sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska

Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys (DGGS) carried out a helicopter-supported geological and geochemical resource assessment project in the Beaver, Bettles, Livengood, and Tanana quadrangles from June 23 through August 5, 2012. The objectives of DGGS's resource assessment are to improve the trace-element geochemical coverage of selected watersheds; to obtain modern, quantitative geochemical analyses; to understand the petrogenesis of the granites; and to better document established mineral occurrences. Stream-sediment, pan-concentrate, and rock sampling were conducted as part of the State's Rare Earth Elements and Strategic Minerals Assessment project, which is...

Tags: Aluminum, Antimony, Arsenic, Augen Gneiss, Barium, All tags... Basalt, Base Metals, Batholith, Beaver Quadrangle, Bedrock, Beryllium, Bettles Quadrangle, Bismuth, Bonanza Creek, Cadmium, Calcium, Caribou Mountain, Cerium, Cesium, Chalcopyrite, Chlorite, Chromium, Coal Creek, Cobalt, Copper, Critical Minerals, Dall River, Dalton Highway, Dysprosium, Economic Geology, Erbium, Europium, Exploration, Felsic, Fish Creek, Fleshlanana Creek, Fluorine, Fort Hamlin Hills, Gadolinium, Galena, Gallium, Geochemical Data, Geochemical Surveys, Geochemistry, Geology, Germanium, Gishna Creek, Gneiss, Gobblers Knob, Gold, Granite, Greisen, Hafnium, Halu Creek, Heavy Metals, Holmium, Hornfels, Igneous Rocks, Iron, Ishtalitna Creek, Kanuti Hot Springs, Kanuti Kilolitna River, Kanuti River, Kilo Hot Springs, Koyuk Mining District, Lanthanide Elements, Lanthanum, Livengood Quadrangle, Lode, Lower Ray Hot Springs, Lutetium, Magnesium, Major Oxides, Manganese, McQuesten Creek, Metabasite, Metals, Metamorphic Rocks, Metasedimentary rocks, Metavolcanic rocks, Mineral Assessment, Mineral Deposit, Mineral Localities, Mineral Resources, Minor Oxides, Molybdenum, Monazite, Mount Henry Eakin, Mount Tozi, Neodymium, Nickel, Niobium, No Name Creek, Non-Metals, Palladium, Pan Concentrates, Phosphorus, Placer, Placer Gold, Platinum, Platinum Group Elements, Potassium, Praseodymium, Precious Metals, Promethium, Prospect Creek, Rare Earth Elements, Ray Mountains, Ray River, Ray River Hot Springs, Ree, Resource Assessment, Resources, Rhyolite, Rubidium, Samarium, Scheelite, Schist, Selenium, Silica, Silver, Sithylemenkat Lake, Sodium, Soil Chemistry, Soil Sampling, Sphalerite, Strategic Minerals, Stream Sediments, Strontium, Sulfides, Sulfur, Tanana Quadrangle, Tantalum, Thallium, Thorium, Tin, Titanium, Tokusatatquaten Lake, Torment Creek, Tourmaline, Trace Elements, Trace Geochemical, Trace Metals, Trans-Alaska Pipeline, Tungsten, Upper Ray Hot Springs, Uranium, Vanadium, Volcaniclastics, Ytterbium, Zeunerite, Zinc, Zirconium, geoscientificInformation, Fewer tags

White Mountains Airborne Magnetic and Radiometric Geophysical Survey

The White Mountains airborne magnetic and radiometric geophysical survey covers parts of the Livengood, Circle, and Fairbanks quadrangles 25 kilometers north of Fairbanks, Alaska. Magnetic and radiometric data were collected with a fixed-wing aircraft June 30 to August 22, 2021 by MPX Geophysics LTD. A total of 36,933 line kilometers were collected covering 13,423 square kilometers. The magnetometer was mounted to a rear-facing fixed boom (tail stinger). The radiometric crystals were located in the cabin of the aircraft. The White Mountains survey was flown with a line spacing of 400 meters (m) and a mean ground clearance of 270 m. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30756....

Categories: Data; Tags: Aeromagnetic, Aeromagnetic Data, Aeromagnetic Map, Aeromagnetic Survey, Aggie Creek, All tags... Airborne Geophysical Survey, Alabam Creek, Albert Creek, Alder Creek, American Creek, Amy Creek, Amy Dome, Analytic Signal, Any Creek, Bachelor Creek, Backman Creek, Bear Creek, Beaver Creek, Beckman Creek, Belle Creek, Belt Creek, Berry Creek, Big Creek, Birch Creek, Bonanza Creek, Boston Creek, Boulder Creek, Bridge Creek, Brigham Creek, Brooks Creek, Brown Lake, Bull Creek, Buster Creek, Butte Creek, Cache Creek, Cache Mountain, Cache Mountain Creek, California Creek, Camp Creek, Captain Creek, Caribou Creek, Cascaden Ridge, Champion Creek, Charity Creek, Chatanika, Chatanika River, Checkerman Creek, Circle Mining District, Cleary Creek, Colorado Creek, Convert Creek, Cora Creek, Crater Creek, Cripple Creek, Crooked Creek, Cushman Creek, DGGS, Deadwood Creek, Deep Creek, Dexter Creek, Discovery Creek, Dome Creek, Dominion Creek, Dora Creek, Duncan Creek, Eagle Creek, Erickson Creek, Ester Creek, Exploration, Fairbanks Mining District, Fish Creek, Flat Creek, Fossil Creek, Franklin Creek, Geologic, Geology, Geophysical Map, Geophysical Survey, Geophysics, Geophysics Search Tag, Georgie Creek, Gertrude Creek, Glacier Creek, Globe Creek, Goldstream Creek, Gridded Data, Grouse Creek, Gunnison Creek, Halfmoon Creek, Hastings Creek, Hayes Creek, Haystack Mountain, Heine Creek, Hess Creek, Homestake Creek, Hope Creek, Idaho Creek, Independence Creek, Isabell Creek, Jefferson Creek, Juniper Creek, Kokomo Creek, Last Chance Creek, Lillan Creek, Lillian Creek, Lime Peak, Line Data, Livengood, Livengood Creek, Livengood Dome, Long Creek, Loper Creek, Lost Creek, Lost Horizon Creek, Lost Horse Creek, Louis Creek, Lucille Creek, Lucky Creek, Lulu Creek, Magnetic Data, Magnetic Survey, Magnetics, Mammoth Creek, Martin Creek, Mascot Creek, Mastodon Creek, Miller Creek, Mineral Resources, Money Knob, Montana Creek, Monti Cristo Creek, Moose Creek, Mount Prindle, Mount Schwatka, Murphy Creek, Murray Creek, Myrtle Creek, Nome Creek, Noodor Dome, Old Chatanika, Olive Creek, Olnes Pond, Ophir Creek, Our Creek, Patterson Creek, Paystreak Creek, Pedro Creek, Perhaps Creek, Pilot Bluff, Pilot Creek, Pinnell Mountain, Poker Creek, Poker Flat, Porcupine Creek, Preacher Creek, Ptarmigan Creek, Quartz Creek, Rampart Mining District, Ranney Hollow, Ready Bullion Creek, Remote Sensing, Richardson Creek, Rock Creek, Rosebud Creek, Roy Creek, Ruby Creek, Rusty Gold Creek, Ruth Creek, Sand Creek, Sargent Creek, Seal Island, Sheep Creek, Shorty Creek, Shovel Creek, Silver Creek, Slate Creek, Slope Creek, Snowshoe Creek, Sourdough Creek, Spruce Creek, Squaw Creek, Steel Creek, Sumner Creek, Swamp Saddle, Table Mountain, Table Top Mountain, Tatalina River, Tatalina Road House, Tolovana Hot Springs, Tolovana Hot Springs Dome, Tolovana Mining District, Tolovana River, Trail Creek, Treasure Creek, Troublesome Creek, Twelvemile Creek, Twelvemile Summit, Twin Creek, USGS Science Data Catalog (SDC), Vadine Creek, Vault Creek, Victoria Creek, Victoria Mountain, Vigor Creek, Warren Creek, Washington Creek, Wedgewood Creek, Westover Creek, White Mountains, Wickersham Creek, Wickersham Dome, Wilber Creek, Wildcat Creek, Willow Creek, Wilson Creek, Windy Creek, Windy Gap, Winter Creek, Wolf Creek, Wonder Creek, Yellow Creek, Zephyr Creek, geoscientificInformation, Fewer tags

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

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