Major-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska

Mineral-resources geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) carried out a helicopter-supported geological and geochemical resource assessment project in the Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles from July 29 through August 16, 2013. The objectives of this assessment were to improve the publicly-available geological, geophysical, and geochemical data in the area of known occurrences in the Mount Hayes Quadrangle, and to extend this coverage and any gained insight westward into the less-explored extension of the Wrangellia terrane. This program of stream-sediment, pan-concentrate, and rock sampling was conducted as part of the State's Strategic Minerals...

Tags: Amphitheater Mountains, Copper, Geochemical Data, Geochemical Surveys, Geochemistry, All tags... Gold, Greenstone, Gulkana Quadrangle, Healy Quadrangle, Mount Hayes Quadrangle, Nickel, Pan Concentrates, Platinum Group Elements, Rare Earth Elements, Silver, Strategic and Critical Minerals Assessment Project, Stream Sediments, Talkeetna Mountains, Talkeetna Mountains Quadrangle, Trace Elements, Ultramafic, geoscientificInformation, Fewer tags

Geology of Kasatochi volcano, Aleutian Islands, Alaska

Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone approximately 3 km in diameter with a lake-filled central crater that is 1.2 km in diameter and extends from the highest point on the island to sea level. The oldest unit recognized is a thick series of mid-Pleistocene glaciovolcanic deposits consisting of autobrecciated lava, lahars, and volumetrically minor lava masses that we believe to have been emplaced underneath a regional ice cap. This unit is unconformably overlain by several massive Holocene lavas, above which lies a thick sequence of latest-Holocene pyroclastic deposits likely deposited during the crater-forming eruption. The...

Tags: Active Volcanoes, Age Dates, Aleutian Arc, Aleutian Islands, Alluvial Deposits, All tags... Analyses, Analyses and Sampling, Basalt, Bedrock, Bedrock Geology, Caldera, Chemistry, Colluvium, Erosion, Fan, Geochemical Data, Geochemistry, Geochronology, Geologic, Geologic Hazards, Geologic Map, Geological Process, Geology, Geomorphology, Hazards, Historic Eruption, Igneous, Kasatochi, Lava Flow, Mineralogy, Petrographic, Petrography, Petrology, Pumice, Pyroclastics, Rockfall, Rocks, Sample Location, Slope Instability, Slump, Soils, Surface, Surficial, Talus, Tephra, Topography, Ultramafic, Uplift, Volcanic, Volcanic Ash, Volcanic Eruption, Volcanic Rocks, Volcaniclastics, Volcanoes, Volcanology, geoscientificInformation, Fewer tags

Preliminary evaluation of bedrock potential for naturally occurring asbestos in Alaska

Naturally occurring asbestos (NOA) develops in predictable geologic settings worldwide. Various geologic units throughout Alaska include rock types that could potentially host naturally occurring asbestos minerals. This report and digital data release show geologic map units throughout Alaska rated according to their interpreted potential to host NOA. To summarize locations of known asbestos occurrences, we searched the U.S. Geological Survey's (USGS's) Alaska Resource Data File (http://ardf.wr.usgs.gov) and Mineral Resource Data System (http://mrdata.usgs.gov/mineral-resources/mrds-ak.html) for references to asbestos in Alaska and compiled the resulting 62 documented asbestos occurrences. To better predict additional...

Tags: Alaska Statewide Maps, Alaska Statewide Quadrangle, Asbestos, Construction Materials, Derivative, All tags... Engineering Geologic Map, Historic Mine, Mineral Localities, Mineral Prospect, Mountain Leather, Tremolite, Ultramafic, geoscientificInformation, Fewer tags

Geologic formations and mine locations for potential CO2 mineralization

This geodatabase contains geologic unit boundaries and asbestos site locations shown in "Carbon dioxide mineralization feasibility in the United States" (Blondes and others, 2019). Data was compiled from source material at a scale range of 1:100,000 to 1:5,000,000 and is not intended for any greater detail.

Categories: Data; Tags: Alabama, Alaska, Arizona, Arkansas, Asbestos, All tags... CO2, California, Carbon Dioxide, Colorado, Connecticut, Delaware, Energy Resources, Geology, Georgia, Hawaii, Idaho, Illinois, Iowa, Kansas, Kentucky, Lake Superior, Mafic, Maine, Maryland, Massachusetts, Michigan, Mineralization, Minnesota, Montana, Nevada, New Hampshire, New Jersey, New Mexico, New York, North America, North Carolina, Oklahoma, Ontario, Oregon, Pennsylvania, Puerto Rico, South Carolina, Tennessee, Texas, USGS Science Data Catalog (SDC), Ultramafic, United States, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming, Fewer tags

Geology of Kasatochi volcano, Aleutian Islands, Alaska

Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone approximately 3 km in diameter with a lake-filled central crater that is 1.2 km in diameter and extends from the highest point on the island to sea level. The oldest unit recognized is a thick series of mid-Pleistocene glaciovolcanic deposits consisting of autobrecciated lava, lahars, and volumetrically minor lava masses that we believe to have been emplaced underneath a regional ice cap. This unit is unconformably overlain by several massive Holocene lavas, above which lies a thick sequence of latest-Holocene pyroclastic deposits likely deposited during the crater-forming eruption. The...

Tags: Active Volcanoes, Age Dates, Aleutian Arc, Aleutian Islands, Alluvial Deposits, All tags... Analyses, Analyses and Sampling, Basalt, Bedrock, Bedrock Geology, Caldera, Chemistry, Colluvium, Erosion, Fan, Geochemical Data, Geochemistry, Geochronology, Geologic, Geologic Hazards, Geologic Map, Geological Process, Geology, Geomorphology, Hazards, Historic Eruption, Igneous, Kasatochi, Lava Flow, Mineralogy, Petrographic, Petrography, Petrology, Pumice, Pyroclastics, Rockfall, Rocks, Sample Location, Slope Instability, Slump, Soils, Surface, Surficial, Talus, Tephra, Topography, Ultramafic, Uplift, Volcanic, Volcanic Ash, Volcanic Eruption, Volcanic Rocks, Volcaniclastics, Volcanoes, Volcanology, geoscientificInformation, Fewer tags

Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska

Late Triassic mafic to ultramafic intrusions in the Wrangellia terrane are host to magmatic sulfide nickel-copper-cobalt and platinum-group element (PGE) mineralization. DGGS's mineral-resources group carried out a geologic mapping project in the eastern Denali Highway region between Watana Creek and Paxson from July 29 through August 7, 2015. This project is part of a multi-year effort focusing on improving the publicly available geological and geochemical data and assessing the mineral potential of the less-explored extension of the western Wrangellia terrane; other data resulting from this project include geophysical surveys and several geochemical datasets. This program of geologic mapping and rock sampling...

Tags: Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, Basalt, All tags... Bedrock Geologic Map, Cobalt, Copper, Critical Minerals, Geochemical Data, Geochemical Surveys, Geochemistry, Greenstone, Lab Methods, Major Oxides, Minor Oxides, Mount Hayes Quadrangle, Nickel, Palladium, Platinum Group Elements, Sample Location, Silver, Strategic Minerals, Strategic and Critical Minerals Assessment Project, Sulfur, Talkeetna Mountains Quadrangle, Trace Geochemical, Ultramafic, geoscientificInformation, Fewer tags

Geochemical analyses of rock samples from the Tonsina area, Valdez Quadrangle, Alaska

The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project, is designed to evaluate Alaska's statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data throughout Alaska. In 2014 and 2015 DGGS also collected and geochemically analyzed 114 rock samples from mafic and ultramafic rocks to evaluate the Tonsina area's potential for platinum-group elements, nickel, and chromium; analytical results are presented in this report.

Tags: Chugach Mountains, Geochemical Data, Geochemical Surveys, Geochemistry, Geology, All tags... Lab Methods, Major Oxides, Metals, Mineral Assessment, Mineral Deposit, Mineral Localities, Mineral Prospect, Mineral Resources, Minerals, Minor Oxides, Nickel, Platinum Group Elements, Rare Earth Elements, Ree, Resource Information, Resources, Sample Location, Strategic Minerals, Strategic and Critical Minerals Assessment Project, Tonsina, Trace Elements, Trace Geochemical, Trace Metals, Ultramafic, Valdez Quadrangle, geoscientificInformation, Fewer tags