The chemistry of eolian quartz dust and the origin of chert

Temporal and spatial sources of silica for chert remain poorly constrained. Modern sources to the worlds oceans include silica in rivers > aeolian (dust) deposition > sea floor vents and submarine weathering. However, changes in aridity and dust flux during the Phanerozoic may explain variations in the ocean silica cycle and times and places of chert formation. The chemistry of fine quartz dust (FQD) provides a chemical mechanism for the transformation of FQD to polymorphs of silica in chert; FQD is readily dissolved, then reprecipitated as Opal-A by either biotic or abiotic processes. An unequivocal relation between increases in dust flux and biogenic opal-A in the western Pacific Ocean during the past 200 kyr...

Tags: Africa, Energy Resources, Geochemistry, International, Soil Sciences, All tags... USGS Science Data Catalog (SDC), aridity, chalcedony, chemistry, chert, deposition, dust, eolian, flocculates, gypsum, loess, microcrystalline, opal, porcellanite, quartz, silica polymorphs, silt, wind, Fewer tags

Thin section showing replacement of arsenopyrite fragments by quartz and sercicite. Tool County, Utah. 1926.

Thin section showing replacement of arsenopyrite fragments by quartz and sercicite. Western Utah Mine. Toole County, Utah. ca. 1926. Plate 11-D, U.S.Geological Survey Professional paper 177. 1935.

Categories: Image; Tags: Mills, Mines, Quarries, Nolan, T.B. Collection, Photographers, Quartz, Sercicite, All tags... Toole County, Utah, photo print, Fewer tags

Vein rock shown, with plain light, showing orthoclase, or, fractured and veined by quartz q. Bartow County, Georgia. 1944.

Photomicrograph of vein rock shown in photo 37, with plain light, showing orthoclase, or, fractured and veined by quartz q. Bartow County, Georgia. Circa 1944. Plate 12-C, in U.S.Geological Survey Professional paper 224. 1950.

Categories: Image; Tags: Bartow County, Georgia, Photomicrographs, Quartz, photo print

Graphic pattern of gold in quartz. Lumpkin County, Georgia. 1935.

Enlargement from just left of center of photo 5, graphic pattern of gold in quartz; photomicrograph by K.E. Lohman. Battle Branch mine. Lumpkin County, Georgia. 1935. Plate 11-B, U.S.Geological Survey Professional paper 213. 1948.

Categories: Image; Tags: Lumpkin County, Georgia, Mills, Mines, Quarries, Park, C.F., Jr. Collection, Photographers, Photomicrographs, All tags... Quartz, photo print, Fewer tags

Fluid Inclusion Noble Gas Data from Goldfield and Tonopah Epithermal Au-Ag Deposits

Twenty-five ore and gangue mineral separates from the Miocene-age Goldfield and Tonopah epithermal Au-Ag deposits in southwestern Nevada were analyzed to determine the helium, neon, and argon (He, Ne, and Ar) isotopic compositions contained in fluid inclusions. Four mineral separates from the Butte Main Stage vein deposit and two from the Bingham pyrite-enargite vein deposits were also analyzed. Fifteen separates are from hand samples collected from underground mine workings and the remaining 16 are from mine tailings piles and pits excavated within the past 100 years. The separates consist dominantly of pyrite, enargite, and quartz, with lesser amounts of sphalerite, galena, potassium feldspar, bismuthinite, marcasite,...

Categories: Data; Tags: 3He/4He, Ar, Bingham Copper Mine, Bingham pyrite-enargite vein deposit, Butte Main Stage vein deposit, All tags... CMERSC, Central Minerals and Environmental Resources Science Center, Goldfield Mining District, Goldfield epithermal Au-Ag deposit, He, MRP, Mineral Resources Program, Mineralogy, Montana, Ne, Nevada, Tonopah Mining District, Tonopah epithermal Au-Ag deposit, USGS Science Data Catalog (SDC), Utah, alunite, argite, argon, bismuthinite, chalcocite, chalcopyrite, economy, epithermal Au-Ag deposit, fluid inclusions, galena, gangue minerals, geoscientificInformation, gold, helium, isotopes, isotopic ratios, marcasite, mineral deposits, mineral separates, neon, noble gas elements, ore, ore formation, potassium feldspar, pyrite, quartz, rhodonite, sphalerite, vein deposit, volatiles, Fewer tags

Vugs and comb quartz. Nevada County, California. 1931.

Vugs and comb quartz: Polished slab from vug, euhedral quartz crystals are coated with white ankerite. The vug is filled with a dark-green mixture of chlorite and mechanically ground quartz in a matrix of carbonates. Nevada County, California. 1931. Plate 15-B, U.S.Geological Survey Professional paper 194. 1940.

Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Johnston, W. D., Jr. Collection, Mills, Mines, Quarries, Nevada County, California, Photographers, Quartz, All tags... photo print, Fewer tags

Compilation of Geospatial Data (GIS) for the Mineral Industries and Related Infrastructure of the People's Republic of China

The U.S. Geological Survey (USGS) has compiled a geodatabase containing mineral-related geospatial data for the People's Republic of China. The data can be used in analyses of the extractive fuel and nonfuel mineral industries and related economic and physical infrastructure integral for the successful operation of the mineral industries within the area of study as well as the movement of mineral products across domestic and global markets. This geodatabase reflects the USGS ongoing commitment to its mission of understanding the nature and distribution of global mineral commodity supply chains by updating and publishing the georeferenced locations of mineral commodity production and processing facilities, mineral...

Tags: Asia, China, Economic Geology, Energy Resources, Fujian Province, All tags... GIS, Geography, Guangdong Province, Guanxi Zhuang Autonomous Region, Hainan Province, Hebei Province, Hunan Province, Information Sciences, Jiangsu Province, LNG, Mineral Resources, NGL, PGE, REE, Shandong Province, South China Sea, Tianjin Municipality, USGS Science Data Catalog (SDC), Zhejiang Province, aluminum, amethyst, antimony, antimony occurrence, antimony resources, aquamarine, aragonite, arsenic, asbestos, barite, barium, bauxite, beforsite, bentonite, beryl beryllium, bismuth, boron, brine, brown coal, bulk cargo, bulk shipping, cadmium, calcium, celestite, cement, cesium, chromium,, clay, coal, coal (brown), coal (hard), coal occurrence, coal resources, coalbed methane, coalfield, cobalt, columbium, commodity, continuous resources, conventional resources, copper, copper occurrence, copper resources, dam, deposit, diamond, electrical transmission lines, electricity, electricity generation, emerald, energy, energy generation, epidote, evaporite-related potash, exploration, extra high voltage, ferroalloys, floating storage, fluorite, fluorspar, fluxstone, gallium, garnet, gas, gas production, gas terminal, gemstone, gemstones, geography, gold, graphite, gypsum, hafnium, halite, halite (brine), hard coal, hydrocarbon resources, iron, iron (carbonatite), iron and steel, iron ore, kyanite, lapiz lazuli, lead, limestone, liquefied natural gas (LNG), lithium, magnesite, magnesium, manganese, marble, maritime port, mercury, methanol, mica, mine, mineral, mineral commodity, mineral deposit, mineral exploration, mineral exports, mineral occurrence, mineral processing, mineral resources, minerals, mining, mining exploration, molybdenum, morganite, muscovite, natural gas, natural gas liquids (NGL), nickel, niobium, niobium (columbium), non-renewable energy, ochre, oil, oil and gas, oil and gas terminal, oil production, oil terminal, onshore, peat, petroleum, phosphate, phosphate occurrence, phosphate resources, phosphorite, phosphorus, platinum-group elements, porphyry copper, port, port terminal, potash, potash occurrence, potash resources, potassium, power, power generation, power lines, power plant, power station, power transmission, quartz, rare earth elements, recoverable resources, refinery, refining, regasification, regasification unit (FSRU), renewable energy, resources, rhenium, rose quartz, rubidium, ruby, salt, sand, sand (glass), sand and gravel, sandstone, sapphire, sediment-hosted stratabound copper, selenium, serpentine, shale gas, shale oil, shipping port, silica, silver, smelting, sodium, sphalerite, spinel, strontium, sulfur, sövite, talc, tantalum, technetium, tellurium, terminal, thorium, tight gas, tight oil, tin, titanium, tourmaline, transmission lines, tungsten, ultra high voltage, unconventional resources, undiscovered resources, uranium, vanadium, vermiculite, water storage, zinc, zirconium, Fewer tags

40Ar/39Ar data, Styx River map area, Lime Hills C-1 Quadrangle, Alaska

This DGGS Raw Data File presents 40Ar/39Ar age dating results for selected igneous rocks encountered in the Styx River area of the western Alaska Range. Crystallization ages on biotite and hornblende from plutonic rocks range from about ~60 to ~63 Ma, while a sericite alteration age in plutonic rocks altered by a dike swarm also is around ~63 Ma. Sericite alteration associated with a copper-molybdenum porphyry ranges from ~10 to ~11 Ma. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. This data release includes the following products: a summary of sample collection methods, the laboratory report, analytical data tables...

Tags: 40Ar/39Ar, Age Dates, Airborne Geophysical Survey, Alaska Range, Analyses and Sampling, All tags... Analytical Results, Ar-Ar, Bedrock Geology, Copper, Economic Geology, Faults, Fracturing, Geochronology, Geology, Gold, Hornblende, K-Feldspar, Lab Methods, Lime Hills Quadrangle, Mica, Mineral Deposit, Mineral Prospect, Mineralogy, Minerals, Mining, Mining Claims, Molybdenite, Muscovite, Ore Deposit Model, Plutonic Rocks, Plutons, Polymetallic Vein, Porphyry, Pyrite, Pyrrhotite, Quartz, Sample Location, Sericite, Sericite Alteration, Styx River, Volcanic Rocks, geoscientificInformation, Fewer tags

ADMMR mining collection file: Last Found

This location is part of the Arizona Mineral Industry Location System (AzMILS), an inventory of mineral occurences, prospects and mine locations in Arizona. Yavapai1200 is located in T11N R1E Sec 28 NW in the Battle Flat - 7.5 Min quad. This collection consists of various reports, maps, records and related materials acquired by the Arizona Department of Mines and Mineral Resources regarding mining properties in Arizona. Information was obtained by various means, including the property owners, exploration companies, consultants, verbal interviews, field visits, newspapers and publications. Some sections may be redacted for copyright. Please see the access statement.

Categories: Data; Tags: 1980s, Arizona, Battle Flat - 7.5 Min, Bradshaw Mts. physiographic area, Corral Pegmatite, All tags... Dataset, Mica, Quartz, T11N R1E Sec 28 NW, United States, Yavapai, geoscientificInformation, nonmetallic mineral resources, reports, topographic maps, Fewer tags

Geologic map of the Circle mining district, Alaska

This report provides detailed (1:63,360-scale) mapping of portions of U.S. Geological Survey Circle B-2 (1955), B-3 (1955), B-4 (1952), C-2 (1955), C-3 (1955), and C-4 (1952) quadrangles. The area is part of the Circle mining district and adjacent to the Fairbanks mining district. This report includes detailed geologic, structural, stratigraphic, and geochronologic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the project has also generated derivative maps of geologic construction materials and geologic hazards.

Tags: Aereal, Aerial Photography, Aeromagnetic Survey, Age Dates, Alaska, State of, All tags... Alluvial Deposits, Alluvium, Amphibolite, Ar-Ar, Bedrock, Bibliography, Birch Creek, C14, Carbonates, Circle Hot Springs, Circle Mining District, Circle Quadrangle, Clastics, Coal, Colluvial Deposits, Colluvium, Conductivity Survey, Conodonts, Crooked Creek, Electromagnetic Survey, Fan, Faulting, Faults, Fluvial, Folding, Fossils, Geologic, Geomorphology, Glacial, Glacial Deposits, Glacial Drift, Granite, Hornblende, Hornfels, Igneous Rocks, K-Ar, Magnetite, Major Oxides, Mammoth Creek, Mastodon Dome, Metamorphic Grade, Metamorphic Minerals, Metamorphism, Mineralogy, Modal Analysis, Petrography, Plutonic, Plutonic Hosted, Porphyry, Precious Metals, Quartz, Regional, Regional Metamorphism, Sample Location, Sandstone, Schist, Sedimentary, Structure, Surficial, Tectonics, Terranes, geoscientificInformation, Fewer tags

Compilation of Geospatial Data (GIS) for the Mineral Industries and Related Infrastructure of Select Countries in Southwest Asia

The U.S. Geological Survey (USGS) has compiled a geodatabase containing mineral-related geospatial data for 10 countries of interest in Southwest Asia (area of study): Afghanistan, Cambodia, Laos, India, Indonesia, Iran, Nepal, North Korea, Pakistan, and Thailand. The data can be used in analyses of the extractive fuel and nonfuel mineral industries and related economic and physical infrastructure integral for the successful operation of the mineral industries within the area of study as well as the movement of mineral products across domestic and global markets. This geodatabase reflects the USGS ongoing commitment to its mission of understanding the nature and distribution of global mineral commodity supply chains...

Tags: Afghanistan, Asia, Cambodia, Economic Geology, Energy Resources, All tags... Geography, India, Indonesia, Information Sciences, Iran, LNG, LNG terminals, Laos, Malaysia–Thailand JDA, Mineral Resources, NGL, Nepal, North Korea, PGE, Pakistan, REE, Thailand, USGS Science Data Catalog (SDC), aluminum, amethyst, antimony, aquamarine, aragonite, arsenic, asbestos, barite, barium, bauxite, beforsite, bentonite, beryl, beryllium, bismuth, boron, brine, brown coal, bulk cargo, bulk shipping, cadmium, calcium, celestite, cement, cesium, chromium, clay, coal, coal (brown), coal (hard), coal occurrence, coal resources, coalbed methane, cobalt, columbium, commodity, continuous resources, conventional resources, copper, copper occurrence, copper resources, critical minerals, deposit, diamond, dry port, electrical transmission lines, electricity, electricity generation, emerald, energy, energy generation, epidote, evaporite-related potash, exploration, ferroalloys, fluorite, fluorspar, fluxstone, gallium, garnet, gas, gas production, gas terminal, gasification, gemstone, gemstones, gold, graphite, gypsum, hafnium, halite, halite (brine), hard coal, hydrocarbon resources, iron, iron (carbonatite), iron and steel, iron ore, kyanite, lapiz lazuli, lead, limestone, liquefaction, liquefied natural gas, lithium, magnesite, magnesium, manganese, marble, maritime port, mercury, methanol, mica, mine, mineral, mineral commodity, mineral deposit, mineral exploration, mineral exports, mineral occurrence, mineral processing, mineral resources, minerals, mining, mining exploration, molybdenum, morganite, muscovite, natural gas, natural gas liquids, nickel, niobium, niobium (columbium), non-renewable energy, ochre, oil, oil and gas, oil and gas terminal, oil production, oil terminal, peat, petroleum, phosphate, phosphate occurrence, phosphate resources, phosphorite, platinum-group elements, porphyry copper, port, port terminal, potash, potash occurrence, potash resources, potassium, power, power generation, power lines, power plant, power station, quartz, rare earth elements, recoverable resources, refinery, refining, regasification, renewable energy, resources, rhenium, rose quartz, rubidium, ruby, salt, sand, sand (glass), sand and gravel, sandstone, sapphire, sediment-hosted stratabound copper, selenium, serpentine, shale gas, shale oil, shipping port, silica, silver, smelting, sodium, sphalerite, spinel, stratabound copper, strontium, sulfur, sövite, talc, tantalum, technetium, tellurium, thorium, tight gas, tight oil, tin, titanium, tourmaline, transmission lines, tungsten, unconventional resources, undiscovered resources, uranium, vanadium, vermiculite, zinc, zirconium, Fewer tags

Geochemical reanalysis of rock and sediment samples from the Middle Fork and South Fork of the Salmon River collected in the mid-1960s through the early 1970s as part of the Idaho Primitive Area studies

This data release is a geochemical data set from the reanalysis of 23 rock and 85 sediment samples collected between 1966 and 1970 by the U.S. Geological Survey (USGS) for a series of studies investigating the mineral resources of the Idaho Primitive Area (Cater et al., 1973). The samples are from the upper Middle Fork Salmon River and the South Fork Salmon River, including the tributaries of East Fork of the South Fork and Porphyry Creek. The overall objective of this study is to characterize the regional impact of legacy mining for the Frank Church - River of No Return Wilderness Area. In 1980 the U. S. Congress passed the Central Idaho Wilderness Act which combined the Idaho Primitive Area, the Salmon Rivers...

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Automatic Creek, Beansnapper Creek, Bear Creek, Big Chief Creek, Big Cottonwood Creek, All tags... Cabin Creek, Cache Creek, Cane Creek, Canyon Creek, Challis Volcanic Group, Colorado, Colt Creek, Cornish Creek, Cultus Creek, Dewey Mine, East Fork Indian Creek, East Fork South Fork Salmon River, East Fork Springfield Creek, East Fork Trail Creek, Forty-five Creek, Frank Church - River of No Return Wilderness Area, GGGSC, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, Glass Mountain, Gunsight Formation, Idaho, Idaho Primitive Area, Indian Creek, Little Indian Creek, Little Loon Creek, Little Pistol Creek, Loon Creek, Luger Creek, MRP, Marble Creek, Mearney Creek, Middle Fork Indian Creek, Middle Fork Salmon River, Middle Fork terraces, Mineral Resources Program, North Fork Porphyry Creek, North Fork Wolf Fang Creek, Pistol Creek, Poee Creek, Porphyry Creek, Profile Creek, Pungo Creek, Rapid River, Ryan Creek, Salmon Rivers Breaks Primitive Area, Shrapnel Creek, Silver Plume, South Fork Salmon River, South Fork Wolf Fang Creek, Spring Creek, Springfield Creek, Sugar Creek, Sunnyside tuff, Tamarack Creek, Thirty-two Creek, Thunder Mountain Caldera, Trail Creek, Trigger Creek, Twenty-five Creek, USA, USGS Science Data Catalog (SDC), United States, Upper Middle Fork Salmon River, West Fork Little Loon Creek, West Fork Trail Creek, Wolf Fang Creek, alluvium, arsenic, atomic absorption analysis, atomic emission spectroscopy, biotite, carbonate rock, chemical analysis, clastic rock, conglomerate, copper, critical minerals, foliation, geochemistry, geology, gneiss, granite, granodiorite, hornblende, hornblende-biotite, hydride generation, lapilli tuff, mass spectroscopy, metallic mineral resources, migmatite, mineral deposits, mineral resources, mineralization, muscovite sulfides, muscovite-biotite, nonmetallic mineral resources, pebble conglomerate, phyllite, porphyry, quartz, rhyolite, rock drainage, sandstone, tributary, tuff, volcanic rock, Fewer tags

Mineral Commodity Summaries 2022 - GEMSTONES Data Release

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

Categories: Data; Tags: United States, agate, beryl, coral, diamond, All tags... garnet, jade, jasper, nonmetallic mineral resources, opal, pearl, quartz, sapphire, shell, topaz, tourmaline, turquoise, Fewer tags

WMR 144 - BeVan Mine. Lemhi County, Nevada. 1943.

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Lemhi County, Idaho, Quartz

Petrology and reservoir potential of Tertiary and Mesozoic sandstones, Cook Inlet, Alaska: A preliminary analysis of outcrop samples collected during 2007-2010 field seasons

The State of Alaska Division of Geological & Geophysical Surveys (DGGS) and Division of Oil & Gas (DOG) are currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. Modal analyses and routine core analyses were performed on Tertiary and Mesozoic siltstones and sandstones collected during the 2007-2010 field seasons from six geographic areas in upper and lower Cook Inlet. The reservoir quality of Cook Inlet sandstones varies widely depending on their mineralogy, geologic age, burial depth, and depositional environment. Tuxedni and Naknek sandstones have poor reservoir quality and are likely to be of equally poor quality down dip. West Foreland sandstones...

Tags: Aleutian Arc, Beluga Basin, Bluff Point, Capps Glacier, Chert, All tags... Chuitna River, Clam Gulch, Cook Inlet, Cook Inlet Basin, Diagenesis, Falls Creek, Feldspar, Fritz Creek, Graywacke, Homer, Iniskin Bay, Iniskin Peninsula, Kachemak Bay, Kaguyak, Matanuska Valley, Mineralogy, Oil Basins, Oil and Gas, Oil and Gas Basin, Outcrop Samples, Permeability, Petrographic, Petrography, Petroleum Basin Study, Petrology, Porosity, Provenance, Pyroclastic Fall, Pyroclastic Flow, Quartz, Reservoir, Reservoir Evaluation, Reservoir Quality, Resource Assessment, Saddle Mountain, Sample Location, Sample Location Map, Sand, Sand and Gravel, Sediment Transport, Sedimentary, Sedimentary Rocks, Sedimentation, Sedimentology, Seward Peninsula, Southcentral Alaska, Straight Creek, Tectonics, Thin Section, Tyonek, Tyonek Quadrangle, Volcanic, Volcanic Ash, Volcaniclastics, Zeolites, geoscientificInformation, Fewer tags

Mineral Operations of Latin America and Canada

This data set consists of records for over 900 mineral facilities in Latin America and Canada. The mineral facilities include mines, plants, smelters, or refineries of aluminum, cement, coal, copper, diamond, gold, iron and steel, nickel, platinum-group metals, salt, and silver, among others. Records include attributes such as commodity, country, location, company name, facility type and capacity if applicable, and generalized coordinates. The data were compiled from multiple sources, including the 2003 and 2004 USGS Minerals Yearbooks (Latin America and Candada volume), data to be published in the 2005 Minerals Yearbook Latin America and Canada Volume, minerals statistics and information from the USGS minerals...

Tags: alumina, aluminum, ammonia, antimony, asbestos, All tags... barite, bauxite, bentonite, bismuth, boron, bullion, carbon black, cement, chromite, chromium, clay, coal, cobalt, columbium, commodity, copper, diamond, dolomite, emerald, ferroalloys, ferronickel, ferrosilicon, fluorspar, gemstone, gold, graphite, gravel, gypsum, iodine, iron, kaolin, lead, lime, limestone, liquified natural gas, lithium, magnesite, magnesium, manganese, metal, methanol, mine, mineral, molybdenum, natural gas, natural gas liquids, nickel, niobium, nitrates, nitrogen, petroleum:crude, petroleum:refinery products, phosphate, potash, pozzolan, processing plant, quartz, rhenium, salt, sand, silica sand, silver, steel, stone, strontium, sulfur, tantalum, tellurium, tin, titanium, tungsten, uranium, urea, zeolite, zinc, zirconium, Fewer tags

Selected geochemistry and mineralogy of Paleozoic strata in northern and central Appalachian basin, U.S.A., 1994-2012

A U.S. Geological Survey (USGS) provisional geochemical and mineralogical database for hydrocarbon-rich shale in the Appalachian region has been compiled by Catherine Enomoto, Frank Dulong and Robert Milici for online distribution. USGS staff collaborated with geologists in State geological agencies to obtain samples that were analyzed for organic properties, including Rock Eval analyses, total organic carbon (TOC), thermal maturity, and semi-quantitative mineralogy. However, the database also contains previously published data, with appropriate citations included. Previously unpublished data are from samples collected and analyzed between 2007 and 2012 from wells drilled between 1931 and 2009, and from exposures...

Categories: Data; Tags: Appalachian Basin, Bitumen, CAI, Carbonate, Chlorite, All tags... Clay, Conodont Alteration Index, Energy Resources, Feldspar, Geochemistry, HI, Hydrogen Enrichment Index, Illite, Inertinite, Kaolinite, Kentucky, LOI, Loss on Ignition, Maryland, Mineralogy, New York, OI, Ohio, Oxygen Enrichment Index, PI, Pennsylvania, Production Index, Pyrite, Quartz, Ro, Rock/Eval, S1, S2, S3, Smectite, TAI, TOC, Thermal Alteration Index, Tmax, Total Hydrocarbon Generation Potential, Total Organic Carbon, Transformation Ratio, USGS Science Data Catalog (SDC), Virginia, West Virginia, conodont, geochemistry, hydrocarbons, kerogen, mineralogy, organic content, pyrolysis, thermal maturity, vitrinite reflectance, Fewer tags

Petroleum geology data from hydrous and anhydrous pyrolysis residues (ver. 2.0, January 2023)

This data release contains programmed pyrolysis, organic petrographic (reflectance), and semiquantitative X-ray diffraction mineralogy data for subsurface coal and shale samples from around the world. Samples were subjected to hydrous or anhydrous pyrolysis experiments at varying temperatures and the resulting residues were analyzed via programmed pyrolysis and reflectance to document changes in thermal maturity.

Categories: Data; Tags: Alabama, Alaska, Alberta, Australia, Bihar, All tags... Caldwell Parish, California, Canada, Carter County, China, Choctaw County, Clark County, Colorado, England, Fairfax County, Freestone County, Garfield County, Gibson County, Greeley County, HI, Harrison County, Illinois, India, Indiana, Jefferson County, Kalmar County, Kansas, Kentucky, Knox County, LOI, Leduc County, Louisiana, Marion County, McLean County, Mississippi, Montana, North Dakota, Nowata County, OI, Ohio, Oklahoma, Oland, PI, Powell County, Red River Parish, Richland County, Rock-Eval, S1, S2, S3, San Saba County, Santa Barbara County, Sweden, Texas, Tmax, Tuscaloosa County, USGS Science Data Catalog (SDC), United States, Val Verde County, Virginia, Ward County, carbonate, chlorite, feldspar, geochemistry, hydrogen enrichment index, illite, kaolinite, loss on ignition, mineralogy, organic content, oxygen enrichment index, production index, pyrite, pyrolysis, quartz, smectite, solid bitumen reflectance, thermal maturity, total organic carbon, vitrinite reflectance, Fewer tags

Petroleum geology data from Cenozoic rock samples in the eastern U.S. Gulf Coast collected 2014 to 2016

The U.S. Geological Survey assessed undiscovered petroleum resources in the downdip Paleogene formations of the U.S. Gulf Coast in 2018. During the assessment new data and information were collected to evaluate thermal maturity, source rock character, and unconventional reservoir rock prospectivity for the Cenozoic-aged section in south Louisiana. Samples were analyzed using multiple analytical approaches, including programmed pyrolysis (Rock-Eval), Leco TOC, organic petrographic analysis including vitrinite reflectance (Ro, %), and X-ray diffraction mineralogy. Associated abstract publication: Valentine, B.J., Elizalde, C., Enomoto, C.B., Hackley, P.C., 2015, Organic petrology and geochemistry of Tertiary and...

Categories: Data; Tags: Acadia Parish, Calcasieu Parish, Cameron Parish, Carbonate, Chlorite, All tags... Energy Resources, Feldspar, HI, Hydrogen Enrichment Index, Illite, Kaolinite, LOI, Loss on Ignition, Louisiana, OI, Oxygen Enrichment Index, PI, Production Index, Pyrite, Quartz, Ro, Rock-Eval, S1, S2, S3, Smectite, St. Bernard Parish, St. Mary Parish, TOC, Terrebonne Parish, Tmax, Total Hydrocarbon Generation Potential, Total Organic Carbon, Transformation Ratio, USGS Science Data Catalog (SDC), Vermilion Parish, geochemistry, hydrocarbons, kerogen, mineralogy, organic content, pyrolysis, thermal maturity, vitrinite reflectance, Fewer tags

Upheaval Dome, Utah, USA: Impact origin confirmed

Upheaval Dome is a unique circular structure on the Colorado Plateau in SE Utah, the origin of which has been controversially discussed for decades. It has been interpreted as a crypto volcanic feature, a salt diapir, a pinched-off salt diapir, and an eroded impact crater. While recent structural mapping, modeling, and analyses of deformation mechanisms strongly support an impact origin, ultimate proof, namely the documentation of unambiguous shock features, has yet to be successfully provided. In this study, we document, for the first time, shocked quartz grains from this crater in sandstones of the Jurassic Kayenta Formation. The investigated grains contain multiple sets of decorated planar deformation features....

Categories: Publication; Types: Citation, Journal Citation; Tags: Geology, TEM data, impact craters, quartz, shock metamorphism