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In support of the proposed Susitna-Watana Hydroelectric Project, the Alaska Division of Geological & Geophysical Surveys (DGGS) developed a Geographic Information System (GIS)-based geologic compilation of published and unpublished maps for twelve, inch-to-mile (1:63,360-scale) quadrangles encompassing the proposed hydroelectric project footprint, including the anticipated reservoir and surrounding area. DGGS geologists reviewed and analyzed existing geologic mapping for quality and completeness, and the maps were converted for use in GIS. The conversion process included scanning and georeferencing the original hard-copy map documents, creating a geodatabase, digitizing the geologic data, assigning attributes, and...
Tags: Bedrock Geologic Map,
Bedrock Geology,
Generalized,
Geodatabase,
Geologic Map, All tags...
Geology,
Gis,
Healy Quadrangle,
Hydropower,
Project Report,
Regional,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Susitna,
Susitna Dam,
Susitna North,
Susitna River,
Susitna-Watana Hydroelectric Project,
Talkeetna Mountains,
Talkeetna Mountains Quadrangle,
Unconsolidated Deposits,
geoscientificInformation, Fewer tags
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...
Tags: Alaska Highway Corridor,
Alaska Pipeline,
Alaska, State of,
Data Normalized Digital Surface Model (nDSM),
Gasline, All tags...
Geomorphology,
Healy Quadrangle,
Lidar,
Proposed Natural Gas Pipeline,
Raster Image,
Remote Sensing,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
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...
Tags: Alaska Highway Corridor,
Alaska Pipeline,
Alaska, State of,
Gasline,
Geomorphology, All tags...
Healy Quadrangle,
Lidar,
Lidar LAS File Format,
Point Cloud Data,
Proposed Natural Gas Pipeline,
Remote Sensing,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
This digital publication, GPR 2014-1, contains data produced from airborne geophysical surveys conducted in 2013 for the Talkeetna Mountains, Healy, and Mt. Hayes quadrangles in south-central Alaska. The area is in the Valdez Creek and Delta River mining districts. Aeromagnetic and electromagnetic (EM) data were acquired by helicopter for about 1310 sq miles, and additional data donated by Millrock Exploration Corporation, Anchorage, increased coverage by about 12 sq miles. Millrock also provided some infill flight lines for over a similar amount of sq miles. CGG acquired and processed all the airborne geophysical data. The data were all flown with the same systems and contract specifications. CGG's frequency-domain...
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Aeromagnetic Survey,
Airborne Geophysical Survey,
Alaska, State of, All tags...
Apparent Resistivity Data,
Apparent Resistivity Map,
DIGHEM V EM System,
Delta River Mining District,
Digital Elevation Model,
Electromagnetic Data,
Electromagnetic Survey,
First Vertical Derivative,
Geophysics,
HEM Survey,
Healy Quadrangle,
Magnetic Survey,
Magnetics,
Mount Hayes Quadrangle,
Talkeetna Mountains Quadrangle,
Valdez Creek Mining District,
geoscientificInformation, Fewer tags
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...
Tags: Alaska Highway Corridor,
Alaska Pipeline,
Alaska, State of,
Coefficient Variation,
Gasline, All tags...
Geomorphology,
Healy Quadrangle,
Lidar,
Proposed Natural Gas Pipeline,
Raster Image,
Remote Sensing,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys carried out a geological field survey, including mapping and sampling, in the eastern part of the Bonnifield mining district in the Fairbanks A-1 and A-2, and the Healy D-1 and D-2 quadrangles, Alaska, from June 16 through July 18, 2008. The fieldwork provides basic information critical to building an understanding of Alaska's geology and is part of an integrated program of airborne geophysical surveys followed by geological mapping. Specifically, this work provides geologic context for geophysical surveys conducted in 2006. To represent a typical lithology, igneous or possible meta-igneous samples were collected and analyzed...
Tags: Alaska Range,
Analyses,
Analyses and Sampling,
Analytical Lab Results,
Analytical Results, All tags...
Bedrock,
Bedrock Geology,
Chemistry,
Chute Creek,
Dry Creek,
Fairbanks Quadrangle,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geologic,
Geology,
Healy Quadrangle,
Igneous,
Igneous Rocks,
Kansas Creek,
Lab Methods,
Metamorphic Rocks,
Methods,
Mineral Assessment,
Mineralogy,
Minerals,
Red Mountain Creek,
Resource Assessment,
Resource Information,
Resources,
Rocks,
Rogers Creek,
STATEMAP Project,
Sample Location,
Sheep Creek,
geoscientificInformation, Fewer tags
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...
This map is the result of field investigations by DGGS in 1997 and 1998. This geologic map and report supersede the previously released Public Data File 1999-24D, Preliminary engineering-geologic map of the Healy A-6 Quadrangle, southcentral Alaska. The current map has been updated to include mapping of areas adjacent to the Healy A-6 Quadrangle. Field investigations were part of a two-year mapping program to provide geologic ground truth for airborne geophysical surveys flown by DGGS in the Chulitna region of southcentral Alaska during 1996.
Tags: Alaska, State of,
Chulitna,
Engineering,
Geologic Hazards,
Geology, All tags...
Healy Quadrangle,
Photogeologic Lineaments,
STATEMAP Project,
Southcentral Alaska,
geoscientificInformation, Fewer tags
This DGGS report presents 40Ar/39Ar age dating results from selected mafic to intermediate intrusions encountered during a geological and geochemical resource assessment project in the Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles. Three intrusions returned mid-Cretaceous crystallization ages, while one olivine gabbro returned a Late Triassic crystallization age. Two altered or metamorphosed samples yielded Late Jurassic and Early Cretaceous ages. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. Products included in this data release are: a summary of sample collection method; the laboratory report,...
Tags: 40Ar/39Ar,
Age Dates,
Amphitheater Mountains,
Analyses,
Analyses and Sampling, All tags...
Analytical Lab Results,
Analytical Results,
Ar-Ar,
Bedrock,
Bedrock Geology,
Geochronology,
Geology,
Gulkana Quadrangle,
Healy Quadrangle,
Lab Methods,
Metamorphism,
Mineral Assessment,
Mineral Deposit,
Mineral Resources,
Mount Hayes Quadrangle,
Platinum Group Elements,
Sample Location,
Skarn,
Strategic and Critical Minerals Assessment Project,
Talkeetna Mountains Quadrangle,
geoscientificInformation, Fewer tags
The Bonnifield electromagnetic and magnetic airborne geophysical survey data were acquired in 2006 and 2007 with a DIGHEM-V Electromagnetic (EM) system and a cesium magnetometer. The EM and magnetic sensors were flown at a height of 30 meters (m). In addition the survey recorded data from radar and laser altimeters, a GPS navigation system, 50/60 Hz monitors and a video camera. Flights were performed with an AS-350-B3 Squirrel helicopter at a mean terrain clearance of 60 m along N-S survey flight lines with a spacing of 400 m. Tie lines were flown perpendicular to the flight lines at intervals of approximately 4,800 m for part of the Bonnifield mining district in Interior Alaska. Aeromagnetic and electromagnetic...
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Airborne Geophysical Survey,
Alaska, State of,
Apparent Resistivity Contours, All tags...
Apparent Resistivity Data,
Apparent Resistivity Map,
Bonnifield Mining District,
Differential Resistivity,
Digital Elevation Model,
Electromagnetic Data,
Electromagnetic Survey,
Fairbanks Quadrangle,
First Vertical Derivative,
Geophysics,
HEM Survey,
Healy,
Healy Quadrangle,
Liberty Bell Mine,
Magnetic Contours,
Magnetic Survey,
Magnetics,
Magnetometer Survey,
Raster Image,
geoscientificInformation, Fewer tags
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...
Tags: Alaska Highway Corridor,
Alaska Pipeline,
Alaska, State of,
Gasline,
Geomorphology, All tags...
Healy Quadrangle,
Lidar,
Lidar Canopy Cover,
Pipeline,
Proposed Natural Gas Pipeline,
Raster Image,
Remote Sensing,
Trans-Alaska Pipeline,
geoscientificInformation, Fewer tags
This report presents in tabular form a complete listing of faunal and minor floral elements, along with their identification as known to date, for all fossils collected by field party members of the Alaska Division of Geological & Geophysical Surveys (DGGS) during their 1997 and 1998 geological mapping effort in the Healy A-6 Quadrangle. In addition, all known U.S. Geological Survey fossil localities that could be located from previously published maps are also shown on the fossil locality map and listed in the fossil register.
Tags: Ammonites,
Bivalves,
Brachiopods,
Bryozoans,
Buchia, All tags...
Chulitna,
Conodonts,
Corals,
Fossils,
Gastropods,
Halobia,
Healy Quadrangle,
Mollusks,
Paleontology,
Pelecypods,
Radiolarians,
Trace Fossils,
geoscientificInformation, Fewer tags
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