AndreaBozzo/ceres-open-data-index huggingface dataset:
U-Pb detrital zircon geochronology of Cretaceous-Cenozoic sedimentary rocks in the Ladue River-Mount Fairplay area, Alaska

This report presents U-Pb detrital zircon dates from three sedimentary rock samples collected in the eastern Tanacross Quadrangle during 2019 geologic mapping by the Alaska Division of Geological & Geophysical Surveys. This geologic map is published concurrently by Twelker and others (2021). The data were collected to support the map interpretation by establishing maximum depositional ages (MDAs) for the sampled strata. Further, these results also bolster a regional detrital zircon dataset that will, collectively, further constrain the Cretaceous-Cenozoic paleogeography of the region. This work is of economic and scientific interest: placer gold in the Fortymile District originated in Jurassic orogenic veins and, in some areas, was transported and concentrated by Cretaceous-Cenozoic depositional systems prior to its deposition in modern placer deposits. This process is described for the Coal Creek and Woodchopper Creek placers between Circle and Eagle and may be relevant elsewhere in the eastern Yukon Tanana Uplands. The analytical data tables associated with this report are available in digital format. Users can access the complete report and digital data from the DGGS website: http://doi.org/10.14509/30683.

Tags: analyses, analyses and sampling, analytical lab results, analytical results, bedrock, bedrock geology, conglomerate, detrital zircon, devonian, fortymile mining district, geochronology, geologic, geological process, geology, isotopes, lab methods, metamorphic, metamorphic minerals, metamorphic rocks, metasedimentary rocks, metavolcanic rocks, methods, mineral assessment, mineral composition, mineral deposit, mineral development, mineral exploration, mineralogy, minerals, mississippian, sample location, sedimentary rocks, u-pb, volcanic rocks, yukon-tanana upland, zircon
Organization: State of Alaska
Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Darby Mountains, Seward Peninsula, Alaska

This report and digital data release presents 209 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 90 rock, 9 stream sediment, 14 soil, and 96 heavy mineral concentrate (pan concentrate) samples. These samples were originally collected by the USBM as part of their search for radioactive mineral deposits in the northern Darby Mountains, eastern Seward Peninsula, Alaska Historic USBM sample materials were retrieved by DGGS from the DGGS Geologic Materials Center (GMC), where the USBM samples were transferred as part of the federally funded Minerals Data and Information Rescue in Alaska (MDIRA) program in the late 1990s and early 2000s. The text and analytical data and tables associated with this report are being released in digital format as PDF files and .csv files. We provide analytical data, detection limits and, when available, the method documentation provided to us by the lab. We also provide the sample location in geographic coordinates, the sample material cited by the originating literature, a reference to the originating report, and the type of sample material that was obtained from the archive and sent to the lab.

Tags: analyses and sampling, base metals, critical minerals, economic geology, economic study, exploration, geochemical surveys, geochemistry, geology, heavy metals, mineral assessment, mineral deposit, mineral development, mineral localities, mineral prospect, mineral resources, minerals, non-metals, platinum group elements, precious metals, rare earth elements, ree, resource assessment, resource information, resources, strategic and critical minerals assessment project, strategic minerals, trace elements, trace geochemical, trace metals
Organization: State of Alaska
East Styx survey area: Airborne magnetic, electromagnetic and radiometric data in line (point), grid, vector, and map formats, Talkeetna, Tyonek, McGrath, and Lime Hills quadrangles, south-central Alaska

This digital publication, GPR 2014-5, contains data produced from airborne geophysical surveys conducted in 2012 and 2013 for the East Styx survey area in the McGrath and Yentna mining districts, Talkeetna, Tyonek, McGrath, and Lime Hills quadrangles, south-central Alaska. Aeromagnetic, electromagnetic (EM), and radiometric data were acquired by helicopter for about 1060 sq miles. CGG's frequency-domain DIGHEM V system was used for the EM data. GPR 2014-5 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data and flight lines; and (4) vector files of data contours and flight lines.

Tags: aeromagnetic data, aeromagnetic map, airborne geophysical survey, alaska, apparent resistivity data, apparent resistivity map, dighem v em system, digital elevation model, electromagnetic data, first vertical derivative, gamma ray survey, geophysics, hem survey, lime hills quadrangle, mcgrath mining district, mcgrath quadrangle, radiometric survey, redoubt mining district, state of, talkeetna quadrangle, tyonek quadrangle, yentna mining district
Organization: State of Alaska
Iron Creek airborne electromagnetic and magnetic geophysical survey data compilation

The Iron Creek electromagnetic and magnetic airborne geophysical survey area is located in Alaska in the Yentna-Cache Creek mining district, about 90 kilometers north-northeast of Anchorage, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEMV system from August 6 to 24, 1997. A total of 5103 line kilometers were collected covering 1852 square kilometers. Line spacing was 400 meters (m). Data were collected an average of 36 m above the ground surface from a helicopter towed sensor platform ("bird") on a 30 m long line. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/27360.

Tags: aeromagnetic, aeromagnetic data, aeromagnetic map, airborne geophysical survey, alaska, analytic signal, apparent resistivity data, apparent resistivity map, apparent resistivity survey, cache creek, daneka lake, diana lakes, dighem-v em system, disappointment creek, electromagnetic anomalies, electromagnetic data, electromagnetic survey, first vertical derivative, game lake, geophysical map, geophysical survey, geophysics, geophysics search tag, gridded data, hem survey, hfem survey, hyphen gulch, iron creek, line data, magnetic contours, magnetic data, magnetic survey, magnetics, peninsula terrane, prairie creek, prospect creek, rainbow lake, raster image, resistivity, sheep creek, sheep river, state of, strategic minerals, talkeetna mountains, talkeetna mountains quadrangle, talkeetna river, tsisi creek, valdez creek mining district, wells mountain, wrangellia terrane, yentna mining district
Organization: State of Alaska
Storm impact survey data for selected Alaska coastal communities in response to Extra-Tropical Cyclone Merbok, September 2022

Storm impact survey data for selected Alaska coastal communities in response to Extra-Tropical Cyclone Merbok, September 2022, Raw Data File 2022-14, presents Global Navigation Satellite System (GNSS) high-water mark (HWM) locations and elevations, coastal profile transects, observed erosion evidence, and ground elevation points for the communities of Golovin, Hooper Bay, Newtok, Nome, Shaktoolik, Stebbins, and Teller, Alaska. These data were collected in the wake of Extra-Tropical Storm Merbok between September 19 and September 23, 2022 by Alaska Division of Geological & Geophysical Surveys (DGGS), with assistance from the Alaska Division of Mining, Land and Water (DMLW) and the U.S. Geological Survey (USGS). The GNSS positional data were collected to assess coastal impacts from the storm. The data are available from the DGGS website: http://doi.org/10.14509/30909.

Tags: beach deposits, climate, climate change, coastal, coastal and river, coastal erosion, dggs, engineering, engineering geology, environment, environmental, geologic, geologic hazards, geological process, geology, geotechnical, holocene, hooper bay, inundation, project report, sea level changes, sea level rise, seward peninsula, southwest alaska, storm deposit, storm surge, surface, surface water, surficial, surficial geology, topography, water
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Gulkana 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. Bare-earth digital elevation models (DEM) represent the earth's surface with all vegetation and human-made structures removed.

Tags: alaska, alaska highway corridor, alaska pipeline, bare-earth digital elevation model (dem), gasline, geomorphology, gulkana quadrangle, lidar, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
Lidar-derived elevation data for Sitka, Alaska

The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced airborne lidar-derived elevation data for Sitka, Alaska. Airborne and ground surveys occurred between the 27th and 30th of April, 2018. These data were produced to assess bare earth slope conditions as part of an overarching, multi-hazard risk analysis for the study area, coordinated through the Federal Emergency Management Agency (FEMA) Cooperating Technical Partners (CTP) program. The project was initiated in response to a tragic debris flow incident that took three Alaskans' lives in 2015. This data collection is released as a Raw Data File with an open end-user license. All files can be downloaded free of charge from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30531).

Organization: State of Alaska
Nikolai electromagnetic and magnetic airborne geophysical survey data compilation

The Nikolai electromagnetic and magnetic airborne geophysical survey is located in interior Alaska in the Delta River mining district, about 200 kilometers southeast of Fairbanks. Frequency domain electromagnetic and magnetic data were collected with the Aerodat Condor system in 1995. A total of 3412.8 line kilometers were collected covering 660.1 square kilometers. Line spacing was 200 meters (m). Data were collected on a helicopter towed sensor platform ('bird') on a 30 m long line. The electromagnetic equipment recorded data slightly above 30 m above ground level (AGL), and the magnetometer recorded data slightly above 45 m AGL due to safety considerations. The Nikolai data were provided to DGGS by the U.S. Department of Interior Bureau of Land Management (BLM) and were merged with the Southern Delta River survey (2002) as a contract deliverable. The 2003 release of the Southern Delta River survey included map sheets of the merged data. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30262.

Tags: aeromagnetic, aeromagnetic data, aeromagnetic map, aeromagnetic survey, airborne geophysical survey, analytic signal, ann creek, apparent resistivity data, apparent resistivity map, apparent resistivity survey, cabin creek, chistochina mining district, clear creek, conductivity survey, delta river, delta river mining district, electromagnetic data, electromagnetic survey, eureka creek, exploration, first vertical derivative, fish lake, frequency domain electromagnetic data, geologic, geology, geophysical map, geophysical survey, geophysics, geophysics search tag, gridded data, landmark gap lake, line data, magnetic data, magnetic survey, magnetics, mccallum creek, mccallum glacier, phelan creek, rainbow mountain, rainbow ridge, rainy creek, rainy mountain, remote sensing, resistivity, resistivity survey, rock creek, rusty lake, specimen creek, valdez creek mining district, wildhorse creek
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Chandalar 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: alaska, alaska highway corridor, alaska pipeline, chandalar quadrangle, gasline, geomorphology, lidar, lidar las file format, point cloud data, proposed natural gas pipeline, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
High-resolution lidar data for Alaska infrastructure corridors

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 has 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 dataset is an index used as a reference frame for the lidar delivery area.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, proposed natural gas pipeline, raster index shapefile, state of, trans-alaska pipeline
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Wiseman 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.Lidar intensity images depict intensity values of the lidar-laser returns.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, lidar intensity image, proposed natural gas pipeline, remote sensing, shaded relief, state of, topographic map, trans-alaska pipeline, wiseman quadrangle
Organization: State of Alaska
Middle Styx electromagnetic, magnetic, and radiometric airborne geophysical survey data compilation

The Middle Styx geophysical survey is located about 150 kilometers northwest of Anchorage, Alaska in the upper South Fork of the Kuskokwim River drainage and south of Rainy Pass in south-central Alaska. The survey is in or near the Yentna, Redoubt, and McGrath mining districts. Frequency domain electromagnetic, magnetic, and radiometric data were collected with the DIGHEMV system from September 12th to November 3rd, 2012 and June 29th to September 27th, 2013. A total of 1154.9 line kilometers were collected covering 406.38 square kilometers. Line spacing was 400 meters (m). Data were collected 30 m above the ground surface from a helicopter towed sensor platform ('bird') on a 30 m long line. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30188.

Tags: aeromagnetic, aeromagnetic data, aeromagnetic map, aeromagnetic survey, airborne geophysical survey, analytic signal, apparent resistivity data, apparent resistivity map, apparent resistivity survey, bear creek, brush creek, conductivity survey, dalzell, dalzell creek, earl river, electromagnetic data, electromagnetic survey, exploration, first vertical derivative, frequency domain electromagnetic data, geologic, geology, geophysical map, geophysical survey, geophysics, geophysics search tag, goodman pass, gridded data, jones river, line data, magnetic data, magnetic survey, magnetics, mcgrath mining district, middle fork kuskokwim river, north fork big river, pass creek, pass fork, post river, rainy pass lake, remote sensing, resistivity, resistivity survey, sheep creek, smith lake, south fork kuskokwim river, tatina river, terra cotta mountains, tin creek, widgeon lake, windy fork middle fork kuskokwim river, wolverine creek, yentna mining district
Organization: State of Alaska
Alaska shoreline change tool

Coastlines are dynamic features that change shape and position on a range of timescales. As a result of this variability, many coastal communities in Alaska must carefully consider patterns of coastal erosion and/or accretion to appropriately plan for the future. Until now, a lack of available information and resources related to shoreline positional data has created challenges in assessing and planning for coastal hazards such as erosion. To address this identified data need, the Alaska Division of Geological & Geophysical Surveys (DGGS) has created the Alaska Shoreline Change Tool, an interactive map that displays historical and projected shoreline positions. This new tool will improve hazard assessments and aid in local management decisions. The Alaska Shoreline Change Tool contains the best available information for shoreline change analysis in Alaska. These data come from many sources and include contributions from shoreline mapping projects conducted by numerous investigators. This digital data distribution package provides digitized, historic shorelines that are proximal to the community of Kivalina

Organization: State of Alaska
Tsunami inundation maps for Juneau, Alaska

In this report, we evaluate potential tsunami hazards for the southeastern Alaska community of Juneau and numerically model the extent of inundation from tsunami waves generated by tectonic and submarine landslide sources. We calibrate our tsunami model by numerically simulating the 2011 Tohoku tsunami at Juneau and comparing our results to instrument records. Analysis of calculated and observed water level dynamics for the 2011 event in Juneau reveals that the model underestimates the observed wave heights in the city by a factor of two, likely due to complex tsunami-tide interactions. We compensate for this numerical underestimation by doubling the coseismic slip of the hypothetical tsunami sources in our models. Potential hypothetical maximum credible tsunami sources include variations of the extended 1964 rupture and megathrust earthquakes in the Prince William Sound and Alaska Peninsula regions. Local underwater landslide events in Lynn Canal, in Favorite, Saginaw, and Gastineau channels, and in Taku Inlet are also considered as possible tsunamigenic scenarios. The results show that the maximum predicted wave height in the Juneau area resulting from a tectonic tsunami is 2-3 m (6-10 ft), while a landslide-generated tsunami may cause a run-up of 15-16 m (49-52 ft) along the Fritz Cove shoreline and potentially flood portions of the airport. Results presented here are intended to provide guidance to local emergency management agencies in tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami hazards.

Tags: bathymetry, berners bay, coastal, douglas, douglas island, eagle river, earthquake, engineering, environmental, faults, favorite channel, flood, fritz cove, geologic, geology, geotechnical, hazards, inundation, juneau, landslide, marine, mendenhall river, modeling, regional, rockfall, saginaw channel, sediment, sedimentation, sheep creek, slides, slope, slump, southeast alaska, subduction, subsidence, surface, taku inlet, tectonics, topography, tsunami, uplift, water
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Beechey Point 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.Lidar intensity images depict intensity values of the lidar-laser returns.

Tags: alaska, alaska highway corridor, alaska pipeline, beechey point quadrangle, gasline, geomorphology, lidar, lidar intensity image, proposed natural gas pipeline, remote sensing, shaded relief, state of, topographic map, trans-alaska pipeline
Organization: State of Alaska
Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment F: Kotlik to Nunam Iqua

Aerial photographs of the coastline from Kotlik to Nunam Iqua were collected on August 31, 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 transparent in red/green/blue images. The file employs Lempel-Ziv-Welch (LZW) compression. Light exposures in the orthoimages are a result of daily weather conditions, which ranged from low cloud cover, rain, and full sun.

Tags: coastal, coastal and river, engineering, engineering geology, environmental, geologic hazards, geology, geomorphology, hazards, kotlik, marine geology, methods, nunam iqua, raster image, surficial
Organization: State of Alaska