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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Alaska Division of Geological & Geophysical Surveys Hendricks, M.D. Kinsman, N.E.M. Overbeck, J.R. Wypych, Alicja More... Tag Types Theme (638) Place (283) Tags (with Scheme=Alaska Division of Geological & Geophysical Surveys) geology (16) geologic (13) analyses (8) engineering (8) engineering geology (7) environmental (7) geologic hazards (7) More... View Results as: JSON ATOM CSV

Major-oxide and trace-element geochemical data from rocks collected in the Tanacross C-1, D-1, and D-2 quadrangles, Alaska in 2017 From June 12-21, 2017, the Alaska Division of Geological & Geophysical Surveys (DGGS) geologists carried out geologic mapping and geochemical sampling in the northeastern Tanacross D-1, and parts of the C-1, and D-2 quadrangles. The project area lies within the Yukon-Tanana Uplands, and encompasses the boundary between Fortymile and Lake George assemblages. It includes porphyry copper-molybdenum-gold deposits and prospects including: Taurus, Fishhook (also known as SW Pika), and Pika Canyon, and is adjacent to the Fortymile Mining District to the north. Highlights of this geochemical report include sampling and characterization of the Pika Canyon, Fishhook, and Taurus prospects. This dataset contains four samples... Tags: Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, Base Metals, All tags... Chemistry, Copper, Critical Minerals, Dewey Creek, Divide Mountain, Economic Geology, Economic Study, Exploration, Fishhook, Fortymile Mining District, Geochemical Data, Geochemical Surveys, Geochemistry, Geologic, Geology, Gold, Lab Methods, Lead, Liberty Creek, Major Oxides, Metals, Methods, Mineral Assessment, Mineral Deposit, Mineral Localities, Mineral Prospect, Mineral Resources, Minerals, Mining, Minor Oxides, Non-Metals, Ore Deposit, Ores, Pika Canyon Prospect, Porphyry, Precious Metals, Prospecting Sites, Rare Earth Elements, Ree, Resource Assessment, Resource Information, Resources, Sample Location, Silver, Stream Sediments, Tanacross Quadrangle, Taurus Prospect, Trace Elements, Trace Geochemical, Trace Metals, geoscientificInformation, Fewer tags Tsunami inundation maps for the city of Sand Point, Alaska Staff from Alaska Earthquake Center, Geophysical Institute and Alaska Division of Geological & Geophysical Surveys evaluated potential tsunami hazards for the city of Sand Point, on Popof Island in the Shumagin Islands archipelago. We numerically modeled the extent of inundation from tsunami waves generated by local and distant earthquake sources. We considered the results in light of historical observations. The worst-case scenarios are defined by analyzing results of the sensitivity study of the tsunami dynamics with respect to different slip distributions along the Aleutian megathrust. For the Sand Point area, the worst-case scenarios are thought to be thrust earthquakes in the Shumagin Islands region with magnitudes... Tags: Active Fault, Alaska Earthquake 1964, Aleutian Islands, Bathymetry, Coastal, All tags... Coastal and River, Earthquake, Emergency Preparedness, Engineering, Engineering Geology, Fault Displacement, Faulting, Faults, Flood, Geologic Hazards, Geology, Hazards, Humboldt Harbor, Inundation, Land Subsidence, Modeling, Popof Island, Raster Image, Sand Point, Seismic Gap, Seismic Hazards, Seismology, Shumagin Islands, Surface, Topography, Tsunami, Water, geoscientificInformation, Fewer tags Geochemistry of some quaternary lavas from the Aleutian Arc and Mt. Wrangell This publication contains previously unpublished geochemical analyses or re-analyses of lavas, magmatic inclusions, and a few gabbroic cumulate inclusions from Alaska volcanoes (Akutan, Augustine, Buzzard Creek, Dana, Douglas, Fourpeaked, Frosty, Great Sitkin, Iliamna, Kaguyak, Kiska, Okmok, Prindle Cone, Recheshnoi, Redoubt, Spurr, Ukinrek Maars, Vsevidof, Westdahl, Wrangell) collected by the authors and others over the past 35 years. It provides substantial data sets for three volcanoes (Vsevidof, Westdahl, and Douglas) for which little or no published data exist. All analyses were made by the GeoAnalytical laboratory at Washington State University in Pullman, WA. The ICP/MS data have been reduced using the 2006... Tags: Adagdak, Adak, Akutan, Analyses, Analyses and Sampling, All tags... Analytical Lab Results, Analytical Results, Augustine, Augustine Volcano, Basalt, Bedrock, Bogoslof, Chemistry, Colorado Creek, Crater Peak, Crystals, Douglas, Faris Peak, Fourpeaked, Frosty, Frosty Peak, Geochemical Data, Geochemistry, Geochronology, Geologic, Geology, Glacier Creek, Hayes, Hazards, Ice, Iliamna, Iliamna Volcano, Jag Peak, Juneau, Kaguyak, Kansas Creek, Kasatochi, Katmai, Kiska, Maars, Mount Douglas, Mount Peulik, Mount Recheshnoi, Mount Spurr, Mount Wrangell, Mount Zanetti, Nikolski, Okmok, Okmok Caldera, Pavlof, Prindle Volcano, Redoubt, Redoubt Volcano, Rhyolite, Rocks, Sample Location, Spurr, Tanana, Tephra, The Sisters, Ukinrek, Ukinrek Maars, Uliaga, Umnak Island, Unimak, Volcanic, Volcanic Arc, Volcanic Rocks, Volcanoes, Volcanology, Vsevidof, Westdahl, Whittier, Wrangell, Yakutat, geoscientificInformation, Fewer tags Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment C: Nome to Elim Aerial photographs of the coastline from Nome to Elim were collected on August 23, 2015. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. This file is a single-band, 32-bit float DSM (digital surface model) which represents surface elevations of buildings, vegetation, and uncovered ground surfaces in meters with 20 cm GSD. The... Tags: Bear Creek, Bonanza River, Cape Darby, Cape Nome, Coastal, All tags... Coastal Erosion, Coastal and River, Daniels Creek, Dry Creek, Elim, Engineering, Engineering Geology, Environmental, Fish River, Flambeau River, Geologic, Geologic Hazards, Geological Process, Geomorphology, Golovin, Hazards, Hillshade Image, Iron Creek, Kachauik River, Kwiniuk River, Methods, Moses Point Fishing Village, Mudyutok River, Nome, Nome River, Orthoimagery, Port Safety, Portage Creek, Raster Image, Rock Creek, Snake River, Solomon, Solomon River, Surface, Surficial, Surficial Geology, White Mountain, Yuonglik River, geoscientificInformation, Fewer tags Photogrammetry-derived digital surface model and orthoimagery of land areas near Resurrection Bay, Alaska The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced a digital surface model (DSM) and an orthorectified aerial optical image mosaic (orthoimagery) of the Resurrection Bay watershed, surrounding the city of Seward in south-central Alaska. Aerial photographs and Global Navigation Satellite System (GNSS) data were collected on August 13, 2015, and were processed using Structure-from-Motion (SfM) photogrammetric techniques to create the DSM and orthoimagery. All data are projected in UTM Zone 6 North (meters) using the NAD83 (2011; EPSG 26906) horizontal datum and NAVD88 (Geoid12A; EPOCH 2010.00) vertical datum. The project was part of an ongoing investigation of the impact of flooding,... Tags: Aerial, Bear Creek, Bear Lake, Bear Lake Glacier, Bear Mountain, All tags... Box Canyon Creek, Caines Head, Callisto Peak, Clear Creek, Derby Cove, Engineering, Engineering Geology, Environmental, First Lake, Fourth of July Creek, Geologic, Geologic Hazards, Geological Process, Geology, Geomorphology, Godwin Creek, Grouse Lake, Hazards, Japanese Creek, Lakes, Likes Creek, Little Bear Lake, Lost Creek, Lost Lake Trail, Lowell Creek, Lowell Point, Marathon Mountain, Methods, Mount Alice, Mount Benson, Mount Eva, Orthoimagery, Phoenix Peak, Preachers Pond, Prospect Glacier, Race Point, Raster Image, Resurrection Bay, Resurrection River, Salmon Creek, Sawmill Creek, Scheffler Creek, Second Lake, Seward, Slope, Spring Creek, Spruce Creek, Surface, Surficial, Surficial Geology, The Lagoon, Thumb Cove, Tiehacker Mountain, Tonsina Creek, Tonsina Point, Vegetation, Water, Woodrow, geoscientificInformation, Fewer tags Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment A: Wales to Teller Aerial photographs of the coastline from Wales to Teller were collected on August 27, 2015 - August 28, 2015. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. Orthoimages contain 4-band, 8-bit, unsigned raster data (red/green/blue/no data; file format-GeoTIFF; source-Fairbanks Fodar) with 20 cm GSD. No-data values are found... Tags: Coastal, Coastal Erosion, Coastal and River, Engineering, Engineering Geology, All tags... Environmental, Geologic, Geologic Hazards, Geological Process, Geology, Geomorphology, Hazards, Hillshade Image, Methods, Orthoimagery, Raster Image, Seward Peninsula, Surface, Surficial, Surficial Geology, Teller, Wales, geoscientificInformation, Fewer tags Major-oxide and trace-element geochemical data from rocks collected in the Richardson mining district, Big Delta Quadrangle, Alaska During the 2017 field season, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted geologic mapping and sampling of part of the Richardson Mining District southeast of Fairbanks, including parts of the Big Delta B-4, B-5, and C-5 quadrangles. The project area is about 30 miles west of the Pogo gold mine and covers the currently active Montecristo and Uncle Sam gold-exploration properties. The goal of DGGS's work in this area is to conduct a mineral-resource assessment and to build an improved understanding of the area's geology and controls on gold mineralization to facilitate industry exploration targeting. This report is based on 17 days of fieldwork completed June 23-July 3,... Tags: Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, Base Metals, All tags... Big Delta Quadrangle, Chemistry, Critical Minerals, Economic Geology, Economic Study, Exploration, Geochemical Data, Geochemical Surveys, Geochemistry, Geologic, Geology, Lab Methods, Major Oxides, McCoy Creek, Metals, Methods, Mineral Assessment, Mineral Deposit, Mineral Localities, Mineral Prospect, Mineral Resources, Minerals, Mining, Minor Oxides, Minton Creek, Monte Cristo Creek, Non-Metals, Ore Deposit, Ores, Precious Metals, Prospecting Sites, Resource Assessment, Resource Information, Resources, Richardson Mining District, Sample Location, Stream Sediments, Trace Elements, Trace Geochemical, Trace Metals, Uncle Sam prospect, geoscientificInformation, Fewer tags Photogrammetry-derived digital surface model and orthoimagery of land areas near Resurrection Bay, Alaska The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced a digital surface model (DSM) and an orthorectified aerial optical image mosaic (orthoimagery) of the Resurrection Bay watershed, surrounding the city of Seward in south-central Alaska. Aerial photographs and Global Navigation Satellite System (GNSS) data were collected on August 13, 2015, and were processed using Structure-from-Motion (SfM) photogrammetric techniques to create the DSM and orthoimagery. All data are projected in UTM Zone 6 North (meters) using the NAD83 (2011; EPSG 26906) horizontal datum and NAVD88 (Geoid12A; EPOCH 2010.00) vertical datum. The project was part of an ongoing investigation of the impact of flooding,... Tags: Aerial, Bear Creek, Bear Lake, Bear Lake Glacier, Bear Mountain, All tags... Box Canyon Creek, Caines Head, Callisto Peak, Clear Creek, Derby Cove, Engineering, Engineering Geology, Environmental, First Lake, Fourth of July Creek, Geologic, Geologic Hazards, Geological Process, Geology, Geomorphology, Godwin Creek, Grouse Lake, Hazards, Japanese Creek, Lakes, Likes Creek, Little Bear Lake, Lost Creek, Lost Lake Trail, Lowell Creek, Lowell Point, Marathon Mountain, Methods, Mount Alice, Mount Benson, Mount Eva, Orthoimagery, Phoenix Peak, Preachers Pond, Prospect Glacier, Race Point, Raster Image, Resurrection Bay, Resurrection River, Salmon Creek, Sawmill Creek, Scheffler Creek, Second Lake, Seward, Slope, Spring Creek, Spruce Creek, Surface, Surficial, Surficial Geology, The Lagoon, Thumb Cove, Tiehacker Mountain, Tonsina Creek, Tonsina Point, Vegetation, Water, Woodrow, geoscientificInformation, Fewer tags Yukon River bridge landslide: Preliminary geologic and geotechnical evaluation This report presents the findings of a geologic and geotechnical evaluation of a landslide at the Yukon River bridge (the E.L. Patton Bridge). The Yukon River bridge landslide occurred in fall 2012 between approximately 375 and 575 feet west of the bridge. Although there was no damage to the bridge foundation, the landslide's close proximity to the bridge and concerns over additional failures prompted multiple evaluations, including landslide documentation, drainage assessments, and geotechnical studies. This report was prepared to convey the general characteristics of the rock mass, characteristics of rock discontinuities, and the geomorphic expression of the 2012 landslide in the vicinity of the bridge. We determined... Tags: Alluvial Fan, Alluvium, Coastal and River Hazards, Colluvial Deposits, Colluvium, All tags... Dalton Highway, Drainage Patterns, Earthquake Related Hazards, Engineering, Erosion, Fracturing, Geological Process, Geology, Geomorphology, Geotechnical, Hazards, Landslide, Livengood Quadrangle, Loess, Permafrost and Periglacial, Slope Instability Hazards, Surficial, Trans-Alaska Pipeline, Translational Landslide, Transportation Corridor, Yukon River, geoscientificInformation, 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 Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment A: Wales to Teller Aerial photographs of the coastline from Wales to Teller were collected on August 27, 2015 - August 28, 2015. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. This file is a single-band, 32-bit float DSM (digital surface model) which represents surface elevations of buildings, vegetation, and uncovered ground surfaces in meters... Tags: Coastal, Coastal Erosion, Coastal and River, Engineering, Engineering Geology, All tags... Environmental, Geologic, Geologic Hazards, Geological Process, Geology, Geomorphology, Hazards, Hillshade Image, Methods, Orthoimagery, Raster Image, Seward Peninsula, Surface, Surficial, Surficial Geology, Teller, Wales, geoscientificInformation, Fewer tags Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment C: Nome to Elim Aerial photographs of the coastline from Nome to Elim were collected on August 23, 2015. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. Orthoimages contain 4-band, 8-bit, unsigned raster data (red/green/blue/no data; file format-GeoTIFF; source-Fairbanks Fodar) with 20 cm GSD. No-data values are found in band 4 or shown as... Tags: Bear Creek, Bonanza River, Cape Darby, Cape Nome, Coastal, All tags... Coastal Erosion, Coastal and River, Daniels Creek, Dry Creek, Elim, Engineering, Engineering Geology, Environmental, Fish River, Flambeau River, Geologic, Geologic Hazards, Geological Process, Geomorphology, Golovin, Hazards, Hillshade Image, Iron Creek, Kachauik River, Kwiniuk River, Methods, Moses Point Fishing Village, Mudyutok River, Nome, Nome River, Orthoimagery, Port Safety, Portage Creek, Raster Image, Rock Creek, Snake River, Solomon, Solomon River, Surface, Surficial, Surficial Geology, White Mountain, Yuonglik River, geoscientificInformation, Fewer tags Updated tsunami inundation maps of the Kodiak area, Alaska Staff from Alaska Earthquake Center, Geophysical Institute and Alaska Division of Geological & Geophysical Surveys evaluated potential potential tsunami hazard for the communities of Kodiak, Womens Bay, and for the U.S. Coast Guard base on Kodiak Island by numerically modeling the extent of inundation from tsunami waves generated by hypothetical earthquake sources. Worst-case hypothetical scenarios are defined by analyzing results of a sensitivity study of the tsunami dynamics related to various slip distributions along the Alaska-Aleutian megathrust. The worst-case scenarios for the Kodiak communities are thought to be the subduction zone earthquakes offshore Kodiak Island with their greatest slip at 5-35 km (3.1-22... Tags: Active Fault, Bathymetry, Coastal, Coastal and River, Earthquake, All tags... Emergency Preparedness, Engineering, Engineering Geology, Environmental, Fault Displacement, Faulting, Faults, Flood, Geologic, Geologic Hazards, Geology, Hazards, Inundation, Kodiak, Kodiak Island, Kodiak Island Borough, Kodiak Quadrangle, Kodiak Station, Land Subsidence, Landslide, Marine Geology, Modeling, Neotectonics, Pillar Mountain, Seismic Hazards, Slope, Subduction, Subsidence, Surface, Tectonics, Tides, Topography, Tsunami, Water, geoscientificInformation, Fewer tags Geologic map of Mount Chiginagak volcano, Alaska Mount Chiginagak is a hydrothermally active volcano on the Alaska Peninsula, approximately 170 km south-southwest of King Salmon, Alaska. This small stratovolcano, approximately 8 km in diameter, has erupted through Tertiary to Permian sedimentary and igneous rocks. The eruptive products of Chiginagak volcano record a history of chiefly andesite lava flows and associated block-and-ash flows. The oldest lavas exposed are Pleistocene in age and are found everywhere around the edifice except in the northeast sector, where Holocene lava flows dominate the landscape. Holocene activity has covered the northeast flank with rubbly-topped andesite lava flows that extend as far as 4.6 km from their source vent at the summit... Tags: Alaska Peninsula, Aleutian Range, Analyses, Chiginagak, Gas, All tags... Geochemistry, Geochronology, Geologic, Geology, Hazards, Igneous, Lahar, Mount Chiginagak, Neoglacial, Pumice, Rocks, Sediment, Sulfur, Surface, Surficial, Tephra, Ugashik Quadrangle, Volcanic, Volcanic Ash, Volcanic Eruption, Volcanic Gas, Volcanic Rocks, Volcaniclastic Deposits, Volcaniclastics, Volcanoes, Volcanology, Water, geoscientificInformation, Fewer tags Major-oxide and trace-element geochemical data from rocks collected near Panorama Mountain, Mile 104 Seward Highway, Crow Pass, and Whittier, Alaska In conjunction with hosting field trips for the Association of American State Geologists 2016 annual meeting in Girdwood, Alaska, Alaska Division of Geological & Geophysical Surveys (DGGS) staff collected rock samples and obtained geochemical analysis from several readily accessible, but relatively unstudied outcrops. Samples were collected from Turnagain Arm (mile 104 Seward Highway), Whittier, Crow Pass, and Panorama Mountain (roughly mile 217 Parks Highway). Mineralized samples from veins and veinlets in granitic rocks from the Crow Pass and Whittier sites contain anomalous levels of gold ranging from 0.129 to 0.650 parts per million (ppm). Although none of the samples are from areas open to mineral entry, geochemical... Tags: Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, Base Metals, All tags... Bedrock, Bedrock Geology, Chemistry, Economic Geology, Exploration, Geochemical Data, Geochemical Surveys, Geochemistry, Geologic, Geologic Map, Geology, Gold, Gold Prospect, Heavy Metals, Igneous, Igneous Rocks, Lab Methods, Magmatic Arc, Major Oxides, Metallogenesis, Metals, Mineral Assessment, Mineral Deposit, Mineral Development, Mineral Localities, Mineral Prospect, Mineral Resources, Mineralogy, Minerals, Mining, Minor Oxides, Ore Deposit, Ores, Petrology, Plutonic, Plutonic Hosted, Plutonic Rocks, Plutons, Precious Metals, Resource Assessment, Resource Information, Resources, Sample Location, Southcentral Alaska, Trace Elements, Trace Geochemical, Trace Metals, Whittier, geoscientificInformation, Fewer tags Geologic map of Mount Chiginagak volcano, Alaska Mount Chiginagak is a hydrothermally active volcano on the Alaska Peninsula, approximately 170 km south-southwest of King Salmon, Alaska. This small stratovolcano, approximately 8 km in diameter, has erupted through Tertiary to Permian sedimentary and igneous rocks. The eruptive products of Chiginagak volcano record a history of chiefly andesite lava flows and associated block-and-ash flows. The oldest lavas exposed are Pleistocene in age and are found everywhere around the edifice except in the northeast sector, where Holocene lava flows dominate the landscape. Holocene activity has covered the northeast flank with rubbly-topped andesite lava flows that extend as far as 4.6 km from their source vent at the summit... Tags: Alaska Peninsula, Aleutian Range, Analyses, Chiginagak, Gas, All tags... GeMS NCGMP09, Geochemistry, Geochronology, Geologic, Geology, Hazards, Igneous, Lahar, Mount Chiginagak, Neoglacial, Pumice, Rocks, Sediment, Sulfur, Surface, Surficial, Tephra, Ugashik Quadrangle, Volcanic, Volcanic Ash, Volcanic Eruption, Volcanic Gas, Volcanic Rocks, Volcaniclastic Deposits, Volcaniclastics, Volcanoes, Volcanology, Water, geoscientificInformation, Fewer tags Core fragment descriptions, Exxon core holes, uplands bordering Yukon Flats basin, east-central Alaska This Raw Data File provides lithologic descriptions of core fragments recovered from a series of core holes drilled by Exxon (mid-80s) in the uplands bordering the Yukon Flats basin. In addition to descriptions of the material, the tabulated file includes geographic location, core hole numbers, an age estimate, core fragment depth, general lithology, grain size, and facies interpretation. The author examined these core materials in Fairbanks during winter and spring 2002. This work was done in preparation for an assessment carried out by the U.S. Geological Survey of undiscovered, technically recoverable hydrocarbon resources in the Yukon Flats basin. Tags: Alaska, State of, Beaver Quadrangle, Bedrock, Bedrock Geology, Black River Quadrangle, All tags... Charley River Quadrangle, Circle Quadrangle, Clastics, Clay, Coal, Coleen Quadrangle, Conglomerate, Core Drilling, Drilling, Eagle Quadrangle, Energy, Energy Resources, Exploration, Exploration Well, Facies Analysis, Gas, Gas Basins, Geologic Materials, Geology, Grain Size, Hydrocarbon, Hydrocarbon Potential, Kandik Basin, Livengood Quadrangle, Oil Basins, Oil Development, Oil and Gas, Oil and Gas Basin, Petroleum, Petroleum Basin Study, Resource Assessment, Resource Information, Resources, Sandstone, Sedimentary, Sedimentary Rocks, Shale, Stratigraphy, Yukon Basin, Yukon Flats, Yukon River, geoscientificInformation, Fewer tags Major-element glass compositions of tephra from the circa 3.6 ka eruption of Aniakchak volcano, Alaska Peninsula, Alaska This Raw Data File presents major-oxide glass geochemical results from the ca. 3.6 ka caldera-forming eruption of Aniakchak volcano, Alaska. These data are part of a larger effort to identify and characterize tephra deposits from the largest eruptions in Alaska for use as geochronological marker horizons. Aniakchak is one of at least 29 volcanoes in Alaska that has had multiple large tephra-producing eruptions. Other deposit and sample metadata including geospatial distributions of this tephra deposit are held in the Alaska Volcano Observatory's online database, the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA), and will be linked to these new geochemical data once published. Products included... Tags: Alaska Peninsula, Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, All tags... Aniakchak, Archaeology, Caldera, Coastal, Geochemistry, Geologic, Geology, Glass, Hazards, Methods, Minerals, Tephra, Tephrochronology, Tephrostratigraphy, Volcanic, Volcanoes, Volcanology, geoscientificInformation, Fewer tags Major-oxide and trace-element geochemical data from rocks collected near Panorama Mountain, Mile 104 Seward Highway, Crow Pass, and Whittier, Alaska In conjunction with hosting field trips for the Association of American State Geologists 2016 annual meeting in Girdwood, Alaska, Alaska Division of Geological & Geophysical Surveys (DGGS) staff collected rock samples and obtained geochemical analysis from several readily accessible, but relatively unstudied outcrops. Samples were collected from Turnagain Arm (mile 104 Seward Highway), Whittier, Crow Pass, and Panorama Mountain (roughly mile 217 Parks Highway). Mineralized samples from veins and veinlets in granitic rocks from the Crow Pass and Whittier sites contain anomalous levels of gold ranging from 0.129 to 0.650 parts per million (ppm). Although none of the samples are from areas open to mineral entry, geochemical... Tags: Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, Base Metals, All tags... Bedrock, Bedrock Geology, Chemistry, Economic Geology, Exploration, Geochemical Data, Geochemical Surveys, Geochemistry, Geologic, Geologic Map, Geology, Gold, Gold Prospect, Heavy Metals, Igneous, Igneous Rocks, Lab Methods, Magmatic Arc, Major Oxides, Metallogenesis, Metals, Mineral Assessment, Mineral Deposit, Mineral Development, Mineral Localities, Mineral Prospect, Mineral Resources, Mineralogy, Minerals, Mining, Minor Oxides, Ore Deposit, Ores, Petrology, Plutonic, Plutonic Hosted, Plutonic Rocks, Plutons, Precious Metals, Resource Assessment, Resource Information, Resources, Sample Location, Southcentral Alaska, Trace Elements, Trace Geochemical, Trace Metals, Whittier, geoscientificInformation, Fewer tags