Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska

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

Mineral Commodity Summaries 2024 - RARE EARTHS Data Release

This data release contains the U.S. salient statistics and world production data extracted from the RARE EARTHS data sheet of the USGS Mineral Commodity Summaries 2024.

Categories: Data; Tags: United States, bastnaesite, cerium, dysprosium, europium, All tags... ferrocerium, lanthanum, metallic mineral resources, monazite, neodymium, rare earths, terbium, Fewer tags

Mineral Commodity Summaries 2023 - RARE EARTHS Data Release

This data release contains the U.S. salient statistics and world production data extracted from the RARE EARTHS data sheet of the USGS Mineral Commodity Summaries 2023.

Categories: Data; Tags: United States, bastnaesite, cerium, dysprosium, europium, All tags... ferrocerium, lanthanum, metallic mineral resources, monazite, neodymium, rare earths, terbium, Fewer tags

Electron microprobe data for monazite and xenotime used in consideration of gold deposit formation models (ver. 2.0, May 2023)

The genetic origin of many gold deposits, including Pogo in Alaska, remains controversial with questions as to whether they formed due to magmatic-hydrothermal or metamorphic-hydrothermal fluids. Gaining a better understanding of the formation mechanisms for these deposits is critical for defining proper exploration criteria in gold-bearing regions and production within these deposits. Monazite are light rare earth (LREE)-bearing and xenotime are heavy rare earth (HREE)-bearing phosphate minerals that are found as alteration products in many gold deposits. In addition to their importance in geochronological investigations, their minor element chemistry may be used to differentiate between metamorphic, magmatic,...

Categories: Data; Tags: Alaska, California, Colorado, EPMA, Montana, All tags... USGS Science Data Catalog (SDC), Yukon, chemical analysis, copper, economy, electron probe micronanalysis, geochemistry, geoscientificInformation, hyperspectral imaging, mineral resources, mineralogy, monazite, particle-beam spectroscopy, sediment geochemistry, soil chemistry, x-ray diffraction, xenotime, Fewer tags

Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and streams sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska

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

Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock samples collected in 2013 in the Ray Mountains area, Bettles A-1 and A-6 quadrangles, Alaska

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

Rare Earth-Thorium-Hematite and Copper Mineralization in Proterozoic Rocks at Lemhi Pass, Idaho-Montana, 2021, Virginia S. Gillerman, Michael J. Jercinovic, Mark D. Schmitz, and Paul Layer

Rare Earth-Thorium-Hematite and Copper Mineralization in Proterozoic Rocks at Lemhi Pass, Idaho-Montana, 2021, Virginia S. Gillerman, Michael J. Jercinovic, Mark D. Schmitz, and Paul Layer The Lemhi Pass district is located along the Continental Divide in the Beaverhead Mountains of Idaho and Montana. Small copper and copper-gold mines were worked in the early 1900s. In the late 1940s, a large number of thorium veins were located and explored in the district. Thorium rare-earth element (Th-REE) mineralization is present as quartz veins and biotite-rich replacements with abundant specular hematite, thorite, and monazite. Host rocks are Mesoproterozoic quartzite and siltite, which have been correlated primarily...

Tags: Geological Collection, Idaho, Lemhi Pass, Lemhi Pass District, Lemhi County, Idaho, monazite, All tags... ndc_collection, thorium, Fewer tags

Mineral Commodity Summaries 2022 - RARE EARTHS Data Release

This data release contains the U.S. salient statistics and world production data extracted from the RARE EARTHS data sheet of the USGS Mineral Commodity Summaries 2022.

Categories: Data; Tags: United States, bastnaesite, cerium, dysprosium, europium, All tags... ferrocerium, lanthanum, metallic mineral resources, monazite, neodymium, rare earths, terbium, Fewer tags