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Geospatial data were developed to characterize pre-fire biomass, burn severity, and biomass consumed for the Black Dragon Fire that burned in northern China in 1987. Pre-fire aboveground tree biomass (Mh/ha) raster data were derived by relating plot-level forest inventory data with pre-fire Landsat imagery from 1986 and 1987. Biomass data were generated for individual species: Dahurian larch (Larix gmelinii Rupr. Kuzen), white birch (Betula platyphylla Suk), aspen (Populus davidiana Dode and Populus suaveolens Fischer), and Mongolian Scots pine (Pinus sylvestris var. mongolica Litvinov). A raster layer of total aboveground tree biomass was also generated. Burned area was manually delineated using the normalized...
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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...
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High-resolution scanning electron microscopy (SEM) visualization of sedimentary organic matter (SOM) is widely utilized in the geosciences for evaluation of microscale rock properties relevant to depositional environment, diagenesis, and the processes of fluid generation, transport, and storage. However, despite thousands of studies which have incorporated SEM approaches, the inability of SEM to differentiate SOM types has hampered the pace of scientific advancement. In this study, we show that SEM-cathodoluminescence (CL) properties can be used to identify and characterize SOM at low thermal maturity conditions. Eleven varied mudstone samples with a broad array of SOM types, ranging from the Paleoproterozoic to...
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This coverage includes arcs, polygons, and polygon labels that describe the generalized geologic age and type of surface outcrops of bedrock of the Far East (China, Japan, Mongolia, North and South Korea, and Taiwan; and parts of Cambodia, Laos, Thailand and Vietnam). It also includes shorelines and inland water bodies.
Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Adelaide and Kanmantoo Fold Belts, Province 3901, Age, Akita Basin, Province 3301, Alakol Basin, Province 1169, Alashan Yinshan Fold Belt, Province 3101, All tags...
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This coverage includes arcs, polygons and polygon labels that describe U.S. Geological Survey defined geologic provinces of the Far East (China, Mongolia, North and South Korea, Japan, Taiwan, and parts of Cambodia, Thailand and Vietnam). Each province has a set of geologic characteristics distinguishing it from surrounding provinces. These characteristics may include the dominant lithologies, the age of the strata, and the structural style. Some provinces include multiple genetically-related basins. Offshore province boundaries are defined by the 2000 meter bathymetric contour.
Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Adelaide and Kanmantoo Fold Belts, Province 3901, Akita Basin, Province 3301, Alakol Basin, Province 1169, Alashan Yinshan Fold Belt, Province 3101, Albany-Fraser Province 3904, All tags...
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The contents of this data release represent the results of the noble gas composition analysis and are presented in support of the planned publication Gao et al., 2023, titled Lead and noble gas isotopic constraints on the origin of Te-bearing adularia-sericite epithermal Au-Ag deposits in a calc-alkaline magmatic arc. Tellurium (Te)-bearing adularia-sericite epithermal Au-Ag deposits are widely distributed in calc-alkaline magmatic arcs and are an important current and future source of precious and critical metals. However, the source of ore-forming fluids in these deposits remain unclear due to the lack of isotopic evidence on Au-, Ag-, and Te-bearing minerals. To advance understanding of the source of Te and precious...
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Crystalline graphite is a primary material in lithium-ion battery anodes which are essential in moving towards green energy. Forecasts for 2040 anticipate an order of magnitude increase in graphite demand driven by sustainable development policies to reduce carbon emissions. Domestic production of graphite ceased in the 1980s after a steady decline post-World War I, meaning the United States relies on natural graphite imports from producers such as China or high-cost synthetic graphite. The current crystalline graphite flake model was released in 1992 and used 100 sites with graphite production. The updated grade and tonnage model uses 72 graphite sites with reports of flake graphite. The updated model implies economically...
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The Terrestrial Analogs Data Portal (TADP; https://tadp.astrogeology.usgs.gov/) has been established as a repository and data discovery portal which leverages USGS ScienceBase, a trusted long-term digital repository that provides access to all USGS data services. Creation of the TADP service is in response to a number of NASA-generated reports identifying the need for a permanent planetary analog repository which adheres to standards-based archives. Presented here is the first version of the Planetary Aeolian Analog Database (PAAD) that will be incorporated into the TADP. This dataset is focused on dune field analogs, currently comprising 45 sites from all over the world and includes a set of "core" attributes (that...
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This study presents a simplified method and empirical relationships for determining organic matter thermal maturity using a portable Raman system equipped with a 785 nm laser, for analysis of crushed, whole-rock samples. Several sets of rocks comprised of shale and coal samples with various mineralogical composition, thermal maturity, total organic carbon (TOC), and age were used to test the method and build correlations between Raman band separation (RBS) values and traditional thermal maturity indicators; organic matter reflectance (Ro) and programmed temperature pyrolysis (Tmax) values. Several sample preparation methods were tested on cuttings material and standard deviation values for RBS were minimized by...


    map background search result map search result map Pre-fire biomass, burn severity, biomass consumption, and fire perimeter data for the 1987 Black Dragon Fire in China Generalized Geology of the Far East (geo3al) Geologic Provinces of the Far East, 2000 (prv3al) Noble Gas Isotopic Data from Fluid Inclusions Contained in the Te-bearing Adularia-Sericite Epithermal Au-Ag Deposits in a Calc-Alkaline Magmatic Arc, NE China Compilation of Geospatial Data (GIS) for the Mineral Industries and Related Infrastructure of the People's Republic of China Portable Raman spectroscopic analysis of bulk crushed rock SEM-CL investigation of sedimentary organic matter samples PAAD: The Planetary Aeolian Analog Database Grade and tonnage data for disseminated flake graphite deposits Pre-fire biomass, burn severity, biomass consumption, and fire perimeter data for the 1987 Black Dragon Fire in China Noble Gas Isotopic Data from Fluid Inclusions Contained in the Te-bearing Adularia-Sericite Epithermal Au-Ag Deposits in a Calc-Alkaline Magmatic Arc, NE China Geologic Provinces of the Far East, 2000 (prv3al) Generalized Geology of the Far East (geo3al) Compilation of Geospatial Data (GIS) for the Mineral Industries and Related Infrastructure of the People's Republic of China Portable Raman spectroscopic analysis of bulk crushed rock SEM-CL investigation of sedimentary organic matter samples Grade and tonnage data for disseminated flake graphite deposits PAAD: The Planetary Aeolian Analog Database