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Geochemistry

Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth.
This category is also used for chemistry (Earth sciences).


Results listed by similarity [list alphabetically]
Surficial geology along the Spokane River, Washington and its relationship to the metal content of sediments (Idaho-Washington stateline to Latah Creek confluence): Sediment geochemistry

The Spokane River flows westward into eastern Washington out of the northern end of Lake Coeur d'Alene in northern Idaho. The river and lake lie downstream of the Coeur d'Alene mining district, where over 56 million metric tonnes of metal-enriched tailin

Bedrock, soil, and lichen geochemistry from Isle Royale National Park, Michigan

This is a report of geochemical data from various media collected on Isle Royale, a large island in northeastern Lake Superior. Isle Royale became a national park in 1940 and was designated as a wilderness area in 1976. USGS sampling began in 1996 as par

Geologic and aeromagnetic maps of the Fossil Ridge area and vicinity, Gunnison County, Colorado

This data set includes a GIS geologic map database of an Early Proterozoic metavolcanic and metasedimentary terrane extensively intruded by Early and Middle Proterozoic granitic plutons. Laramide to Tertiary deformation and intrusion of felsic plutons ha

Geochemical analyses of soils and sediments, Coeur d'Alène drainage basin, Idaho: Sampling, analytical methods, and results.

This report presents the results of over 1100 geochemical analyses of samples of soil and sediment from the Coeur d'Alène (CdA) drainage basin in northern Idaho. The location (in 3 dimensions) and a lithological description of each sample is included wit

Lead-rich sediments, Coeur d'Alene River valley, Idaho; Area, volume, tonnage, and lead content: Surface-sediment geochemical data

This metadata file (pbsamthk.met) describes two dBase4 tables. One table (alsamPb.dbf) contains UTM coordinates for 998 surface-sediment geochemical sample sites, and concentration of lead, in parts per million (ppm Pb), in each sample. The other table (t

Preliminary Lithogeochemical Map Showing Near-Surface Rock Types in the Chesapeake Bay Watershed, Virginia and Maryland

This preliminary experimental lithogeochemical map shows the distribution of rock types in the Virginia and Maryland parts of the Chesapeake Bay watershed. The map was produced digitally by classifying geologic-map units according to composition, mineral

Generalized lithology and lithogeochemical character of near-surface bedrock in the New England region

This geographic information system (GIS) data layer shows the dominant lithology and geochemical, termed lithogeochemical, character of near-surface bedrock in the New England region covering the states of Connecticut, Maine, Massachusetts, New Hampshire,

The geochemical landscape of northwestern Wisconsin and adjacent parts of northern Michigan and Minnesota (geochemical data files)

This report contains geochemical data gathered in the Ashland and Rice Lake 1 degree x 2 degree quadrangles in northern Wisconsin and adjacent parts of northern Michigan and Minnesota. The data, in part, is focused on the Chequamegon National Forest. Nine

Whole Rock Geochemical Data For Paleozoic Sedimentary Rocks of the western Brooks Brooks Range, Alaska

This report presents geochemical analyses for 210 unaltered and unmineralized rock samples of Paleozoic age in the western Brooks Range of northern Alaska. These data form the basis for a study by Slack et al. (2004a) on the provenance and depositional hi

Whole rock geochemical data for altered and mineralized rocks, Red Dog Zn-Pb-Ag district, western Brooks Range, Alaska

This report presents geochemical analyses for 220 mostly altered and mineralized rock samples from the Red Dog Zn-Pb-Ag district in the western Brooks Range of northern Alaska. These data form the basis for a study by Slack et al. (2004a) on hydrothermal

Sediment Magnetic and Geochemical Data from Quaternary Lacustrine Sediment in Two Cores from Tule Lake, Siskiyou County, California

Sediment magnetic and geochemical results have been obtained from the top 60 meters of lacustrine sediments recovered in two cores from Tule Lake in northern California. The sediment magnetic and geochemical data, presented here in tabular form, compleme

National Geochemical Atlas: The Geochemical Landscape of the Conterminous United States Derived from Stream Sediment and other Solid Sample Media Analyzed by the National Uranium Resource Evaluation (NURE) Program

This CD presents maps derived from a subset of the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) data. Approxiamately 260,000 samples were analyzed in the continental U.S. and consisted of solid sam

Sediment Database and Geochemical Assessment of Lake Pontchartrain Basin

Detailed chemical, station (source and documentation, sample locations), and texture data are provided for bottom sediments of Lake Pontchartrain, Louisiana. The sediment data are provided as spreadsheet (Microsoft Excel), database (Microsoft Access), and

Geochemical characterization of mine waste at the Ely Copper Mine superfund site, Orange County, Vermont

An environmental impact study is done for the abandoned Ely copper mine. The extent of contamination is studyed along with the type and chemical composition of the mine waste piles.

Major- and trace-element concentrations in soils from northern California: Results from the Geochemical Landscapes project pilot study

Regional-scale geochemical survey designed to serve as a baseline for further analyses, and to understand effects of historical mining in the area.

Geologic map of the Tetilla Peak quadrangle, Santa Fe and Sandoval Counties, New Mexico

This digital geologic map summarizes all available geologic information for the Tetilla Peak quadrangle located immediately southwest of Santa Fe, New Mexico. The geologic map consists of new polygon (geologic map units) and line (contact, fault, fold ax

Ferricrete, manganocrete, and bog iron occurrences with selected sedge bogs and active iron bogs and springs in the upper Animas River watershed, San Juan County, Colorado

During 1996 to 2000, the Bureau of Land Management, National Park Service, Environmental Protection Agency, United States Department of Agriculture (USDA) Forest Service, and the U.S. Geological Survey (USGS) developed a coordinated strategy to (1) study

Lead-rich sediments, Coeur d'Alene River valley, Idaho; Area, volume, tonnage, and lead content: Geologic and wetland unit data

This metadata file (cdafldpl.met) describes three shape files. Shape file cdasurf4_utm.shp, with its associated .shx and .dbf files, contains polygons and attributes for a map of geologic and wetland units and systems, which represent sedimentary depositi

Lead-rich sediments, Coeur d'Alene River valley, Idaho; Area, volume, tonnage, and lead content: River reach data (by segment)

This metadata file (pbrchseg.met) describes three shape files used. Shape file rivreach.shp contains the upstream and downstream boundaries of seven reaches of the river. Natural features define river-reach boundaries at the confluence of the North and So

Chemical Composition of Samples Collected from Waste Rock Dumps and Other Mining-Related Features at Selected Phosphate Mines in Southeastern Idaho, Western Wyoming, and Northern Utah

This text file contains chemical analyses for 31 samples collected from various phosphate mine sites in southeastern Idaho (25), northern Utah (2), and western Wyoming (4).

Case study of the environmental signature of a recently abandoned, carbonate-hosted replacement deposit: The Clayton Mine, Idaho

Multi-element geochemical analysis of host rock, ore, mine waste, flotation-mill tailings, slag, stream sediments, creek and adit waters, and leachates of mine waste and mill tailings.

Surficial geology along the Spokane River, Washington and its relationship to the metal content of sediments (Idaho-Washington stateline to Latah Creek confluence): Geologic units

The Spokane River flows westward into eastern Washington out of the northern end of Lake Coeur d'Alene in northern Idaho. The river and lake lie downstream of the Coeur d'Alene mining district, where over 56 million metric tonnes of metal-enriched tailin

Data sets of China sedimentary rock-hosted Au deposits: Appendix III and Appendix IV

These data sets include deposit description, location, and geochemistry of sedimentary rock-hosted (Carlin-type) Au deposits in P.R. China. Deposit data was compiled by U.S. Geological Survey and Tianjim Geological Academy into a series of tables (.xls a

Chemical data for rock, sediment, biological, precipitate, and water samples from abandoned copper mines in Prince William Sound, Alaska

In the early 20th century, approximately 6 million metric tons of copper ore were mined from numerous deposits located along the shorelines of fjords and islands in Prince William Sound, Alaska. At the Beatson, Ellamar, and Threeman mine sites (fig. 1), r

Analytical results for stream sediment and soil samples from the Commonwealth of Puerto Rico, Isla de Culebra, and Isla de Vieques

Geochemical data from 2560 stream sediment samples collected in Puerto Rico, 421 soil samples collected on Isla de Vieques, and 35 soil samples were collected on Isla de Culebra, analyzed by semiquantitative spectrographic methods.

Core OL-92 from Owens Lake, southeast California

The drilling project at Owens Lake commenced in April, 1991. This Open-File Report represents an effort to make available to other researchers our preliminary data collected during the first year of study following completion of the core-drilling phase.

Digital National Uranium Resource Evaluation (NURE) for the Pacific Northwest: a contribution to the Interior Columbia Basin Ecosystem Management Project

This report provides background information on the regional geochemical data provided by the US Geological Survey to the US Forest Service and Bureau of Land Management Interior Columbia Basin Ecosystem Management Project (ICBEMP). This report is one in

Online Files for Acid Deposition Sensitivity Map

The following digital product represents the Acid Deposition Sensitivity of the Southern Appalachian Assessment Area. Areas having various susceptibilities to acid deposition from air pollution are designated on a three tier ranking in the region of the S

Sediment Magnetic and Paleomagnetic Data from Buck Lake, Oregon

Sediment magnetic, paleomagnetic and geochemical results have been obtained from lacustrine sediments recovered in a 30-meter core taken by rotary drilling methods at Grass Lake, Siskiyou County, California. The data have been analyzed and interpreted in

Digital analytical data from mineral resource assessments of National Forest lands in Washington

Unpublished mineral assessment reports of the Colville and Okanogan national forests (Chelan, Ferry, Okanogan, Pend Oreille, Skagit, Stevens, and Whatcom counties, WA) contain data on 3,934 samples analyzed for gold, silver, copper, lead, zinc, molybdenum

Dust Deposition in Southern Nevada and California, 1984- 1989: Relations to climate, source area, and lithology

Dust samples taken annually for five years from 55 sites in southern Nevada and California provide an unparalleled source of information on modern rates of dust deposition, grain size, and mineralogical and chemical composition. The relations of modern d

Methane in coastal sea water, sea ice, and bottom sediments, Beaufort Sea, Alaska

This report summarizes data acquired from 1990 to 1994 for the gas-hydrate portion of the USGS project "Permafrost and gas hydrate as possible sources of methane" of the USGS Global Change and Climate History program. The objective of this project has be