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Cook Inlet has been recognized as the second-largest petroleum province in Alaska, second only to the North Slope. The south-central Tyonek Quadrangle is an area of significant geologic interest because it is the only location in Cook Inlet where the entire producing stratigraphy of the basin is exposed on the surface. Additionally, this area encompasses the structural boundary between the forearc basin and its sediment source rocks. To better understand the petroleum system and the geologic relationships between the exhumed arc intrusive rocks and adjacent Cenozoic stratigraphy of the Cook Inlet forearc basin, during the summer of 2010 the Alaska Division of Geological & Geophysical Surveys conducted a federally-funded...
Tags: Alaska Range,
Analyses,
Analyses and Sampling,
Analytical Lab Results,
Analytical Results, All tags...
Bedrock,
Bedrock Geology,
Chemistry,
Cook Inlet,
Cook Inlet Basin,
Exploration,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geology,
Igneous,
Igneous Rocks,
Lab Methods,
Magmatic Arc,
Major Oxides,
Minor Oxides,
Neacola Mountains,
Petrology,
Resources,
Rocks,
STATEMAP Project,
Sample Location,
Tordrillo Mountains,
Trace Elements,
Trace Geochemical,
Tyonek,
Tyonek Quadrangle,
Volcanic,
Volcanic Arc,
Volcanic Rocks,
geoscientificInformation, Fewer tags
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
This report and digital data release presents 82 new rock geochemical analyses on historic U.S. Bureau of Mines (USBM) samples. These samples were originally collected by the USBM as part of their critical and strategic minerals project, which investigated tin occurrences associated with the Ohio Creek pluton, south-central 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...
Tags: Analyses and Sampling,
Base Metals,
Critical Minerals,
Economic Geology,
Economic Study, All tags...
Exploration,
Geochemical Data,
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
Re-analyses of sample pulps and bulk rejects from historic USBM rock and heavy-mineral-concentrate samples were conducted by the Alaska Division of Geological & Geophysical Surveys (DGGS) as part of the State of Alaska's Strategic and Critical Minerals Assessment project, which is designed to evaluate Alaska's potential for these resources. The objective of this resource assessment is to expand the state's geochemical database by obtaining and publishing modern, quantitative geochemical analyses for historic USBM samples, where available. Highlights of this re-analysis project include heavy mineral concentrates with up 7,220 ppm Sn, 5,870 ppm Cr, and 17,000 ppm Mn.
Tags: Aluminum,
Antimony,
Arsenic,
Barium,
Basalt, All tags...
Base Metals,
Beaver Quadrangle,
Bedrock,
Beryllium,
Bettles Quadrangle,
Bismuth,
Bonanza Creek,
Cadmium,
Calcium,
Caribou Mountain,
Cerium,
Cesium,
Chlorite,
Chromium,
Coal Creek,
Cobalt,
Copper,
Critical Minerals,
Dall River,
Dalton Highway,
Dysprosium,
Economic Geology,
Erbium,
Europium,
Exploration,
Felsic,
Fish Creek,
Fluorine,
Fort Hamlin Hills,
Gadolinium,
Galena,
Gallium,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Germanium,
Gobblers Knob,
Gold,
Granite,
Greisen,
Hafnium,
Heavy Metals,
Holmium,
Igneous Rocks,
Iron,
Ishtalitna Creek,
Kanuti Hot Springs,
Kanuti Kilolitna River,
Kanuti River,
Kilo Hot Springs,
Koyukuk Mining District,
Lanthanide Elements,
Lanthanum,
Livengood Quadrangle,
Lode,
Lower Ray Hot Springs,
Lutetium,
Magnesium,
Manganese,
McQuesten Creek,
Metabasite,
Metals,
Metamorphic Rocks,
Metasedimentary rocks,
Metavolcanic rocks,
Mineral Assessment,
Mineral Deposit,
Mineral Resources,
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,
Rubidium,
Samarium,
Scheelite,
Schist,
Selenium,
Silica,
Silver,
Sithylemenkat Lake,
Sodium,
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,
Ytterbium,
Zeunerite,
Zinc,
Zirconium,
geoscientificInformation, Fewer tags
This report and digital data release presents 90 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 56 rock, 16 sediment, 5 soil, and 12 heavy mineral concentrate (pan concentrate) samples, as well as 1 sample of indeterminate type. Some of these samples were originally collected by the USBM as part of their mineral investigations in the Porcupine River drainage, northeastern Alaska, and a portion of the samples were collected as part of the National Uranium Resource Evaluation. 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...
Tags: Analyses and Sampling,
Base Metals,
Critical Minerals,
Economic Geology,
Economic Study, All tags...
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
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...
Tags: Analyses and Sampling,
Base Metals,
Critical Minerals,
Economic Geology,
Economic Study, All tags...
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
This report and digital data release presents 12 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 6 rock, 4 stream sediment, and 2 heavy mineral concentrate (pan concentrate) samples. These samples were originally collected by the USBM to follow up reported tungsten anomalies in the VABM Bend area, Charley River and Eagle quadrangles, east-central 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...
Tags: Analyses and Sampling,
Base Metals,
Critical Minerals,
Economic Geology,
Economic Study, All tags...
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska's statewide potential for strategic and critical mineral resources. The SCM Assessment project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For the geochemical part of the SCM Assessment project, thousands of geochemical-sample analyses and locations from historical U.S. Bureau of Mines (USBM), U.S. Geological Survey (USGS), Bureau of Land Management (BLM), DGGS, Alaska Territorial Department of Mines, Alaska Division of Mines and...
Tags: Alaska Statewide Quadrangle,
Alaska, State of,
Analyses,
Analyses and Sampling,
Analytical Lab Results, All tags...
Analytical Results,
Chemistry,
Critical Minerals,
Economic Geology,
Economic Study,
Exploration,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geologic,
Geology,
Lab Methods,
Major Oxides,
Metals,
Methods,
Mineral Assessment,
Mineral Localities,
Mineral Prospect,
Mineral Resources,
Minerals,
Mining,
Minor Oxides,
Non-Metals,
Ores,
Precious Metals,
Rare Earth Elements,
Ree,
Resource Assessment,
Resource Information,
Resources,
Sample Location,
Strategic Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
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...
Tags: Alaska Range,
Aluminum,
Antimony,
Arsenic,
Barium, All tags...
Basalt,
Base Metals,
Bedrock,
Beryllium,
Bismuth,
Cadmium,
Calcium,
Cerium,
Cesium,
Chalcopyrite,
Chlorite,
Chromium,
Cobalt,
Copper,
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,
Metals,
Mineral Assessment,
Mineral Deposit,
Mineral Localities,
Mineral Resources,
Minor Oxides,
Molybdenum,
Neodymium,
Nickel,
Niobium,
Non-Metals,
Palladium,
Phosphorus,
Platinum,
Platinum Group Elements,
Plutons,
Potassium,
Precious Metals,
Promethium,
Rubidium,
Selenium,
Silica,
Silver,
Sodium,
Sphalerite,
Strategic Minerals,
Strategic and Critical Minerals Assessment Project,
Strontium,
Sulfides,
Sulfur,
Talkeetna Quadrangle,
Tantalum,
Thallium,
Thorium,
Tin,
Titanium,
Tourmaline,
Trace Elements,
Trace Metals,
Tungsten,
Tyonek Quadrangle,
Uranium,
Vanadium,
Volcanic,
Zinc,
Zirconium,
geoscientificInformation, Fewer tags
This report and digital data release presents 40 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 33 rock and 7 heavy mineral concentrate (pan concentrate) samples. These samples were originally collected by the USBM as part of their critical and strategic minerals project, which investigated the rare-earth-element and uranium mineral potential of the Zane Hills area, northwestern 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...
Tags: Analyses and Sampling,
Base Metals,
Critical Minerals,
Economic Geology,
Economic Study, All tags...
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
This report and digital data release presents 131 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 86 rock and 42 heavy mineral concentrate (pan concentrate) samples, as well as 3 samples of indeterminate type. Some of these samples were originally collected by the USBM from the Ray River watershed, and the Kanuti and Hodzana Rivers uplands, central Alaska, and a portion of the samples were collected as part of the National Uranium Resource Evaluation. 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...
Tags: Analyses and Sampling,
Base Metals,
Critical Minerals,
Economic Geology,
Economic Study, All tags...
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
In 2016, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) and University of Alaska Fairbanks 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). This report provides results of stream-sediment sampling for trace-element geochemistry. An initial suite of sediment samples was collected from streams draining known gold occurrences, including the Stibnite Creek and Noah prospects, and numerous prospects in the White Gold area. These samples were split in half and the two splits were sieved to -200 mesh and -80 mesh, respectively. The splits were then both analyzed to determine...
Tags: Analyses,
Analyses and Sampling,
Analytical Lab Results,
Analytical Results,
Chemistry, All tags...
Dall Prospect,
Eagle Prospect,
Economic Geology,
Exploration,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geology,
Gold,
Heavy Metals,
Jacqueline Prospect,
Lab Methods,
Metals,
Mineral Assessment,
Mineral Deposit,
Mineral Localities,
Mineral Prospect,
Mineral Resources,
Placer,
Placer Gold,
Precious Metals,
STATEMAP Project,
Shalosky Prospect,
Stream Sediments,
Tanacross Quadrangle,
Tok,
Tok Mining District,
Tok River,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska's statewide potential for strategic and critical mineral resources. The SCM Assessment project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For the geochemical part of the SCM Assessment project, thousands of geochemical-sample analyses and locations from historical U.S. Bureau of Mines (USBM), U.S. Geological Survey (USGS), Bureau of Land Management (BLM), DGGS, Alaska Territorial Department of Mines, Alaska Division of Mines and...
Tags: Alaska Statewide Quadrangle,
Alaska, State of,
Analyses,
Analyses and Sampling,
Analytical Lab Results, All tags...
Analytical Results,
Base Metals,
Chemistry,
Critical Minerals,
Economic Geology,
Economic Study,
Exploration,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geologic,
Geology,
Lab Methods,
Major Oxides,
Metals,
Methods,
Mineral Assessment,
Mineral Deposit,
Mineral Localities,
Mineral Prospect,
Mineral Resources,
Minerals,
Mining,
Minor Oxides,
Non-Metals,
Ore Deposit,
Ores,
Palladium,
Platinum,
Platinum Group Elements,
Precious Metals,
Prospecting Sites,
Resource Assessment,
Resource Information,
Resources,
Sample Location,
Strategic Minerals,
Strategic and Critical Minerals Assessment Project,
Stream Sediments,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
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
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
This report and digital data release presents 326 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 106 rock, 164 stream sediment, and 56 heavy mineral concentrate (pan concentrate) samples. These samples were originally collected by the USBM as part of a mineral-reconnaissance project in the Selawik Hills area of northwestern 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...
Tags: Analyses and Sampling,
Base Metals,
Critical Minerals,
Economic Geology,
Economic Study, All tags...
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
In 2012, the State of Alaska established its Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), to evaluate Alaska's statewide potential for SCM resources. The project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For decades, the Ray Mountains area of west-central Alaska has been explored for its potential mineral resources. To further assess the rare-earth-element (REE) potential of the State-selected and top-filed lands in the Ray Mountains area, mineral-resource geologists at DGGS carried out a helicopter-supported geological and...
Tags: Base Metals,
Batholith,
Bedrock,
Bettles Quadrangle,
Cerium, All tags...
Chlorite,
Critical Minerals,
Dalton Highway,
Dysprosium,
Economic Geology,
Erbium,
Europium,
Exploration,
Felsic,
Fluorine,
Fort Hamlin Hills,
Gadolinium,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geology,
Gneiss,
Greisen,
Heavy Metals,
Holmium,
Hornfels,
Igneous Rocks,
Iron,
Lanthanide Elements,
Lanthanum,
Lode,
Lutetium,
Major Oxides,
Metals,
Metamorphic Rocks,
Metavolcanic rocks,
Mineral Assessment,
Mineral Deposit,
Mineral Localities,
Mineral Resources,
Minor Oxides,
Monazite,
Neodymium,
No Name Creek,
Phosphorus,
Placer,
Praseodymium,
Promethium,
Rare Earth Elements,
Ray Mountains,
Ray River,
Ree,
Resource Assessment,
Resources,
Rhyolite,
Rubidium,
Samarium,
Sample Location,
Scheelite,
Schist,
Silica,
Silver,
Strategic Minerals,
Strategic and Critical Minerals Assessment Project,
Thallium,
Thorium,
Tin,
Titanium,
Tourmaline,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
This report presents 40Ar/39Ar step-heating geochronology results for igneous and metamorphic rocks from the Alaska Division of Geological & Geophysical Surveys' (DGGS) geologic mapping project in the Tanacross A-5 and A-6 quadrangles and adjoining areas. Our results indicate the Hona granodiorite pluton intruded the area in the Late Cretaceous between 76 and 71 Ma. We determined Cretaceous metamorphic ages from 126 to 121 Ma for hornblende, biotite, sericite and muscovite from multiple samples of upper greenschist to amphibolite grade rocks. This is consistent with regional argon results that imply this area is in the upper plate of the Yukon Tanana Terrane (Hansen and Dusel-Bacon, 1998). Basaltic andesite dikes...
Tags: 40Ar/39Ar,
Amphibolite,
Analyses,
Analyses and Sampling,
Analytical Lab Results, All tags...
Analytical Results,
Basalt,
Bedrock,
Crystals,
Exploration,
Faulting,
Geochronology,
Geologic,
Geology,
Gneiss,
Granite,
Granodiorite,
Greenschist,
Hornblende,
Igneous,
Isotopes,
Metamorphic,
Metamorphic Rocks,
Metamorphism,
Methods,
Mica,
Mineral Composition,
Mineral Prospect,
Mineralogy,
Minerals,
Muscovite,
Noah Prospect,
Plagioclase,
Plutonic,
Rocks,
Sample Location,
Sericite,
Shalosky Prospect,
Tanacross Quadrangle,
Tok,
Tok Mining District,
Tok River,
geoscientificInformation, Fewer tags
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
This report and digital data release presents 286 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 93 rock, 110 stream sediment, 52 soil, and 28 heavy mineral concentrate (pan concentrate) samples, as well as 3 samples of indeterminate type. These samples were originally collected as part of studies by the USBM in the Circle mining district, western Crazy Mountains, and Lime Peak area of the White Mountains, Circle Quadrangle, east-central 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...
Tags: Analyses and Sampling,
Base Metals,
Circle Mining District,
Circle Quadrangle,
Critical Minerals, All tags...
Economic Geology,
Economic Study,
Exploration,
Geochemical Data,
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 Minerals,
Strategic and Critical Minerals Assessment Project,
Trace Elements,
Trace Geochemical,
Trace Metals,
White Mountains,
geoscientificInformation, Fewer tags
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