AndreaBozzo/ceres-open-data-index huggingface dataset:
Jumbo Dome, Interior Alaska: Whole-rock, major- and trace-element analyses

Jumbo Dome is a hornblende andesite dome of Pleistocene age located in the Healy Quadrangle of central Alaska, about 19 km northeast of Healy, Alaska. Jumbo Dome is approximately 1.6 km long, 1.3 km wide, and 500 m high and intrudes the Devonian Keevy Peak Formation basement (slate, quartz-sericite schist, graphitic schist, calcareous schist, quartz-feldspar metawacke, and conglomerate) and overlying Tertiary Suntrana Formation (sandstone, clay, and coal). Jumbo Dome is not well studied and these samples plus the three analyses from Albanese (1980) represent the known total of published whole-rock geochemical analyses for this volcanic feature. Jumbo Dome lava has the diagnostic arc signature of low ratios of concentrations of high-field-strength elements to large-ion-lithophile elements (for example, Nb/La, Nb/Rb).

Tags: analytical lab results, analytical results, healy quadrangle, jumbo dome, major oxides, trace geochemical, volcanoes, volcanology
Organization: State of Alaska
Major-oxide and trace-element geochemical data from rocks collected in the Tok River area, Tanacross A-5 and A-6 quadrangles, Alaska in 2016

Geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) and University of Alaska carried out a two-part geologic mapping and geochemical sampling project in the Tok River area of the Tanacross A-5 and A-6 quadrangles (June 12-26 and July 8-26). The Tok River area is adjacent to the Delta mineral belt volcanogenic massive-sulfide (VMS) district, the Peak gold-silver-copper skarn, and the structurally controlled gold and antimony mineralization in the Stibnite Creek and White Gold areas. The Tok River project area includes the Noah (also called Hona) prospect, an intrusion-related copper prospect. The combination of insufficient detailed geologic mapping, historical and current industry interest in the adjacent mineralized areas, and the recently published geophysical data prompted the DGGS Mineral Resources section to work in this area. Highlights of this DGGS Tok River geochemical report include identification, sampling, and characterization of prospects without previously available public data, including the Eagle, Dall, Parton, and Jacqueline prospects. This dataset has 22 samples with gold in excess of 0.5 ppm in several different locations, including a sample with 9.78 ppm Au (16ET254, Shalovsky vein), a sample with 6.25 ppm Au from nearby Hona porphyry (16ET312), a sample containing 1.22 ppm Au from a vein within schist south of Dry Tok Creek (16KS255), and a sample with 1.315 ppm Au from drill hole WG-11-05 (16RN165B, Eagle trend). Major- and trace-element geochemical analyses were obtained for the metamorphic rocks to distinguish between igneous and sedimentary protoliths and for igneous rocks to characterize and differentiate Mesozoic and Cenozoic rocks in the area.

Tags: analyses, analyses and sampling, analytic signal, analytical lab results, analytical results, antimony, arsenic, bedrock, cenozoic, chemistry, dall prospect, delta mineral belt, devonian, eagle prospect, geochemical data, geochemical surveys, geochemistry, gold, gold prospect, jacqueline prospect, lab methods, major oxides, massive sulfide deposit, massive sulfide occurrence, massive sulfide prospect, massive sulfides, mesozoic, metallogenesis, metals, metamorphic rocks, metasedimentary rocks, metavolcanic rocks, mineral assessment, mineral localities, mineral prospect, minor oxides, noah prospect, parton prospect, shalosky prospect, tanacross quadrangle, tertiary, tok, tok mining district, tok river, trace elements, trace geochemical, volcanogenic massive sulfide
Organization: State of Alaska
Preliminary volcano-hazard assessment for Okmok Volcano, Umnak Island, Alaska

This dataset consists of the vector digital GIS files that were used to create sheet 1 of the "Preliminary volcano-hazard assessment for Okmok Volcano, Umnak Island, Alaska" (DGGS RI 2004-3). The map area is centered around Okmok Volcano, on eastern Umnak Island. The data includes volcano-hazard zones for ballistics, ash accumulation, pyroclastic flows, floods and lahars, and debris avalanches. Also included in the dataset are roads, trails, seismic station locations, continuous GPS station locations, creeks, and the location of the Fort Glenn airstrip.

Tags: aleutian arc, aleutian islands, fort glenn, fox islands, mount, okmok, okmok caldera, umnak island, volcanoes
Organization: State of Alaska
Shoreline change at Alaska coastal communities, Kwigillingok, Alaska

The Division of Geological & Geophysical Surveys has analyzed long-term shoreline change at 48 Alaska communities. Shoreline datasets were compiled from previously published U.S. Geological Survey assessments and created from historical and recent aerial images by the Alaska Division of Geological & Geophysical Surveys. Shorelines were analyzed to calculate shoreline change rates every 25 meters along coastlines and tidally influenced riverbanks using the Digital Shoreline Analysis System (DSAS; Himmelstoss and others, 2018). The geodatabase for each community includes shoreline positions, the alongshore baseline used to cast transects, and transects that include shoreline change rates and statistics. All files can be downloaded free of charge from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30552).

Tags: aerial, aerial photography, alaska, coastal, dggs, emergency preparedness, engineering, environmental, erosion, flood, floodplain, geology, hazards, inundation, kwigillingok, marine geology, outreach, sea level changes, shelf, shoreface, storm surge, surface, tides, topography, water
Organization: State of Alaska
40Ar/39Ar ages of rocks collected from the Passage Canal area, Seward D-7 Quadrangle, Alaska

This report presents 40Ar/39Ar step-heating geochronology results from a single outcrop of a mineralized near-trench intrusion exposed in a road cut near Whittier, Alaska. The outcrop is the best road-accessible occurrence of a Tertiary near-trench pluton in the region and is commonly visited by field trips, yet no prior geochronological data from this outcrop have been published. Two chronologically distinct intrusive bodies, the Paleogene Sanak-Baranof belt and the Eshamy-suite, are documented in the upper Cook Inlet area. Geochronological analysis of the two samples described in this report confirms that the Whittier road-cut intrusion and veins are coeval (53.0 +/- 0.3 Ma and 50.9 +/- 0.2 Ma, respectively) with the Sanak-Baranof suite and not the younger, Eshamy plutonic suite. Analyses were performed by the University of Alaska Fairbanks (UAF) Geochronology Laboratory, and results were reported by Jeff Benowitz and Paul Layer. Products included in this data release are a summary of sample collection methods, the laboratory report, analytical data tables and associated metadata, and plots of the 40Ar/39Ar age spectra and Ca/K and Cl/K ratios.

Tags: 40ar/39ar, age dates, analyses, analyses and sampling, analytical lab results, analytical results, ar-ar, bedrock, bedrock geology, cenozoic, geochronology, geologic, geology, igneous, igneous rocks, isotopes, lab methods, methods, mineralogy, paleogene, rocks, sample location, seward quadrangle, volcanic arc, volcanic rocks, whittier
Organization: State of Alaska
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 No Data value is set to -32767. The file employs LZW compression.

Tags: bear creek, bonanza river, cape darby, cape nome, coastal, coastal and river, coastal erosion, 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
Organization: State of Alaska
Major-oxide, minor-oxide, and trace-element geochemical data from rocks in the Styx River area, Lime Hills C-1 Quadrangle, Lime Hills, McGrath, Talkeetna, and Tyonek quadrangles, Alaska

Geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) Mineral Resources Section conducted four weeks of helicopter-supported mapping and fieldwork from June 26 through July 24, 2013. The Styx River project in the Lime Hills C-1 Quadrangle was part of the State-funded Airborne Geophysical/Geological Mineral Inventory (AGGMI) program as part of the State's Strategic Minerals Assessment Project, an initiative designed to evaluate Alaska's potential for rare-earth elements, PGEs, and other similarly supply-challenged resources. The Styx River project area has active and ongoing mineral exploration for deposit types including porphyry copper/molybdenum/gold, reduced intrusion-related gold, and polymetallic veins. Lead-zinc skarns, molybdenum-bearing quartz veins, sediment-hosted base-metal, platinum-group-element, and rare-earth-element deposit types are also present. This report provides new, publicly-available geological and geochemical data in the vicinity of known mineral occurrences throughout the project area. Samples were analyzed for a variety of suites of major and trace elements depending on the sample type. The analytical data tables associated with this report are being released in digital format as comma-delimited text (CSV) files.

Tags: alaska range, aluminum, antimony, arsenic, barium, basalt, base metals, bedrock, beryllium, bismuth, cadmium, calcium, cerium, cesium, chalcopyrite, chlorite, chromium, cobalt, copper, cretaceous, critical minerals, dysprosium, economic geology, erbium, europium, exploration, felsic, fluorine, gadolinium, galena, gallium, geochemical data, geochemical surveys, geochemistry, geology, germanium, gold, granite, greisen, hafnium, heavy metals, holmium, hornfels, igneous rocks, iron, lime hills quadrangle, lode, lutetium, magnesium, major oxides, manganese, mcgrath quadrangle, mesozoic, metals, mineral assessment, mineral deposit, mineral localities, mineral resources, minor oxides, molybdenum, neodymium, nickel, niobium, non-metals, paleozoic, palladium, phosphorus, platinum, platinum group elements, plutons, potassium, precious metals, promethium, rubidium, selenium, silica, silver, sodium, sphalerite, strategic and critical minerals assessment project, strategic minerals, strontium, sulfides, sulfur, talkeetna quadrangle, tantalum, tertiary, thallium, thorium, tin, titanium, tourmaline, trace elements, trace metals, tungsten, tyonek quadrangle, uranium, vanadium, volcanic, zinc, zirconium
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Nabesna Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The dataset represents all classified laser returns from the LiDAR survey and their associated geospatial coordinates.

Tags: aerial geology, alaska, digital elevation model, digital surface model (dsm), geologic hazards, geology, geomorphology, hazards, holocene, lidar, lidar las file format, nabesna quadrangle, point cloud data, remote sensing, slope instability, state of, trans-alaska pipeline
Organization: State of Alaska
Derivative geologic materials map of the Tanana B-1 Quadrangle, central Alaska

This report provides detailed (1:63,360-scale) mapping of the Tanana B-1 Quadrangle (250 square miles; equivalent to four 7.5 minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the north of the Tanana A-1 and A-2 Quadrangles. This report includes a derivative map of geologic construction materials based on the resulting geologic maps, field investigations, and laboratory materials analyses.

Tags: engineering, floods, geologic, geomorphology, permafrost, surficial, yukon-tanana upland
Organization: State of Alaska
Shoreline change at Alaska coastal communities, Togiak, Alaska

The Division of Geological & Geophysical Surveys has analyzed long-term shoreline change at 48 Alaska communities. Shoreline datasets were compiled from previously published U.S. Geological Survey assessments and created from historical and recent aerial images by the Alaska Division of Geological & Geophysical Surveys. Shorelines were analyzed to calculate shoreline change rates every 25 meters along coastlines and tidally influenced riverbanks using the Digital Shoreline Analysis System (DSAS; Himmelstoss and others, 2018). The geodatabase for each community includes shoreline positions, the alongshore baseline used to cast transects, and transects that include shoreline change rates and statistics. All files can be downloaded free of charge from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30552).

Tags: aerial, aerial photography, alaska, coastal, dggs, emergency preparedness, engineering, environmental, erosion, flood, floodplain, geology, hazards, inundation, marine geology, outreach, sea level changes, shelf, shoreface, storm surge, surface, tides, togiak, topography, water
Organization: State of Alaska
Shoreline change at Alaska coastal communities, Kongiganak, Alaska

The Division of Geological & Geophysical Surveys has analyzed long-term shoreline change at 48 Alaska communities. Shoreline datasets were compiled from previously published U.S. Geological Survey assessments and created from historical and recent aerial images by the Alaska Division of Geological & Geophysical Surveys. Shorelines were analyzed to calculate shoreline change rates every 25 meters along coastlines and tidally influenced riverbanks using the Digital Shoreline Analysis System (DSAS; Himmelstoss and others, 2018). The geodatabase for each community includes shoreline positions, the alongshore baseline used to cast transects, and transects that include shoreline change rates and statistics. All files can be downloaded free of charge from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30552).

Tags: aerial, aerial photography, alaska, coastal, dggs, emergency preparedness, engineering, environmental, erosion, flood, floodplain, geology, hazards, inundation, kongiganak, marine geology, outreach, sea level changes, shelf, shoreface, storm surge, surface, tides, topography, water
Organization: State of Alaska
WebGeochem: DGGS Geochemical Sample Analysis Search Engine

This application allows users to view available geochemical data in a fully documented HTML table format. Users define the suite of sample analyses to be displayed by selecting sample and analysis types and either a geographic area or a previously compiled dataset. The data is stored in the DGGS Geologic and Earth Resource Information Library of Alaska (GERILA) digital database. The display tables are designed to provide documentation of the search criteria, samples, analyses, and individual geochemical determinations to the level reflected in their source publications or in project files to the best of DGGS staff's ability. The source GERILA dataset is incomplete and is added to as more data can be formatted and collected.

Tags: alaska, geochemistry, major oxides, trace elements, trace metals
Organization: State of Alaska
Derivative Map of the Geologic Materials and Hazards in the Eastern Half McGrath Quadrangle, Alaska

This map illustrates the potential near-surface sources of various geologic materials that may be useful for construction. Field observations indicate that each geologic unit has a definite composition or range of composition wherever that unit is found. Therefore, the presence of materials is interpreted from the distribution of geologic units on the geologic map of this quadrangle. This map is generalized and is not intended to show exact locations of specific materials. The map also addresses some of the principle geologic hazards that may be associated with the deposits based upon their general physical properties and conditions that are characteristic of their depositional environment.

Tags: alaska, alluvial deposits, cambrian, carboniferous, cenozoic, colluvial deposits, cretaceous, denali-farewell fault, devonian, dillinger terrane, early devonian, early jurassic, early silurian, eolian, farewell terrane, geologic hazards, geologic materials, geology, glacial deposits, jurassic, kahiltna terrane, late devonian, late permian, late silurian, mcgrath, mckinley terrane, mesozoic, middle devonian, middle fork plutonic complex, mystic terrane, ordovician, paleozoic, permian, pingston terrane, post river pluton, proterozoic, quaternary, silurian, state of, tertiary, triassic, veleska lake volcanic complex, yukon-tanana terrane
Organization: State of Alaska
Photogrammetric data of the Haines Highway corridor: May 26, 2014

The State of Alaska Division of Geological &amp; Geophysical Surveys (DGGS) produced an orthorectified aerial optical image mosaic (orthoimage) and digital surface model over an area extending from milepost (MP) 17 to approximately MP 24.5 on the Alaska State Highway 7 (Haines Highway) north of Haines along the Chilkat River in southeast Alaska. The aerial photogrammetric survey targeted large debris fans and their alpine source areas on the west side of the Takshanuk Mountains in support of cryosphere hazards mapping and monitoring efforts. Aerial photographs and Global Navigation Satellite System (GNSS) data were collected on May 26, 2014, and were processed using Structure-from-Motion (SfM) photogrammetric techniques to create the orthoimagery. For the purpose of enabling open access to geospatial datasets in Alaska, this collection is being released as a Raw Data File with an open end-user license. The data files available for download are tiled GeoTIFFs. All data are projected in UTM Zone 8 North (meters) using the NAD83 (2011; EPSG 6337) horizontal datum and NAVD88 (Geoid12A; EPOCH 2010.00) vertical datum.

Tags: aerial, alaska, chilkat river, debris flow, engineering, engineering geology, environmental, geologic hazards, geology, geomorphology, haines, hazards, holocene, klukwan, methods, orthoimagery, raster image, slope, southeast alaska, state of, surface, surficial, takshanuk mountains
Organization: State of Alaska
Bedrock-geologic map, Alaska Highway corridor, Tetlin Junction, Alaska to Canada border

Preliminary Interpretive Report 2019-3, Bedrock-geologic map, Alaska Highway corridor, Tetlin Junction, Alaska to Canada border, shows the distribution of bedrock units exposed at or near the surface in the corridor along the Alaska Highway in parts of the Tanacross A-1, A-2, A-3, and B-3 and Nabesna C-1, D-1, and D-2 quadrangles. It is the easternmost of three bedrock-geologic maps along the Alaska Highway corridor. It is part of a multi-year project conducted by the Alaska Division of Geological & Geophysical Surveys (DGGS) between 2006 and 2013. The project focused on investigating and reporting the geology and geologic hazards of the corridor. Bedrock units were mapped and structural elements were measured in the field; where bedrock units are covered by surficial units and vegetation, units were interpreted using airborne-magnetic and electromagnetic surveys published by DGGS in 2006. Rock names were assigned based on field and petrographic observations, modal-mineral percentages, and interpretations of geochemical data. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/30038.

Tags: actinolite, alaska highway corridor, alcan, allanite, amphibolite, apatite, batholith, beaver creek, bedrock, big john lake, big lake, bitters creek, calcite, cemetery lake, charlieskin creek, charlieskin village, chisana mining district, chisana river, chlorite, conglomerate, contact, correlation, cretaceous, damundtali lake, deadman lake, desper creek, devonian, discontinuity, eliza lake, epidote, exploration, faults, feldspar, felsic, fish camp lake, fish lake, folding, folds, fortymile mining district, gardiner creek, garnet, gems, gems ncgmp09, geologic, geologic map, geology, glacial, gneiss, granite, granodiorite, graphite, grass lake, greenschist, greenstone, hidden lake, high cache, hornblende, hornfels, hudeuc lake, igneous, igneous rocks, interpretation, island lake, joe lake, kalutna river, kathakne, kathakne village, ladue river, lake george assemblage, lamprophyre, leaf lake, little scottie creek, long lake, magnetite, marble, mark creek, metabasite, metamorphic, metamorphism, mica, midway lake, mineralogy, minerals, mirror creek, mississippian, moose creek, muscovite, nabesna river, nabesna slough, nabesna village, northway, northway junction, northway village, nuziamundcho lake, open creek, orthogneiss, pauline lakes, permian, plagioclase, plutonic, plutons, porcupine grass lake, porphyry, pullin lake, pyrite, quartz, resources, rhyolite, rocks, round lake, sandstone, schist, scottie creek, sericite, shashamund lake, silver, silver creek, skate lake, south fork ladue river, steve lake, stuver creek, swan lake, sweetwater creek, tanana river, tectonics, tenmile creek, tenmile lake, terranes, tertiary, tetlin river, tlechegn lake, tlocogn lake, tok mining district, tourmaline, triassic, tsilchin lake, tuff, tushaday lake, ultramafic, volcanic, willow lake, yarger lake, zircon
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Healy Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. This digital surface model represents coefficient of variation of the above ground height of vegetation returns.

Tags: alaska, alaska highway corridor, alaska pipeline, coefficient variation, gasline, geomorphology, healy quadrangle, lidar, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska