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The table contains oxide and cation compositions of olivine grains from drill core of the Duluth Complex, Minnesota. The oxides were determined by electron probe microanalysis (EPMA) and are reported in weight percent (wt%). The cations were calculated based on the oxide compositions and are reported in mole percent (mol%). Olivine is a magnesium iron orthosilicate mineral with the formula (Mg2+, Fe2+)2SiO4. Olivine forms a solid solution series with magnesium (Mg) at one end and iron (Fe) at the other. Forsterite (Mg2SiO4) is the magnesium endmember and fayalite (Fe2SiO4) is the iron endmember. Minor elements can substitute into the crystal structure, such as manganese (Mn) and nickel (Ni). To better understand...
Categories: Data;
Types: Citation;
Tags: Cook County,
Duluth,
Environmental Health,
Geochemistry,
Lake County, All tags...
Mineralogy,
Minnesota,
St. Louis County,
USGS Science Data Catalog (SDC),
electron microscopy,
mineralogy, Fewer tags
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Mineral resource occurrence data covering the world, most thoroughlywithin the U.S. This database contains the records previously provided in the Mineral Resource Data System (MRDS) of USGS and the Mineral Availability System/Mineral Industry Locator System (MAS/MILS) originated in the U.S. Bureau of Mines, which is now part of USGS. The MRDS is a large and complex relational database developed over several decades by hundreds of researchers and reporters. This product is a digest in which the fields chosen are those most likely to contain valid information.
Categories: Data;
Types: Downloadable;
Tags: Federal Government,
MRDS,
US Geological Survey,
USGS,
Wyoming, All tags...
economic geology,
economy,
mine sites,
mineral deposit areas,
mineral resources, Fewer tags
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The tables in this data release provide measures of quality for each of 304,643 records in the Mineral Resources Data System (MRDS) database, located at https://mrdata.usgs.gov/mrds/ describing mineral resources worldwide but focusing on those located in the United States. One table provides the measures of quality, the other provides the overall record scores that may be used to sort records by overall quality. MRDS is distributed from the U.S. Geological Survey (USGS) in several different formats for the convenience of a variety of different users. For example a flattened version of the database is available in which the one-to-many relationships in MRDS are suppressed by combining them into a single field, resulting...
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Interactive map exploration tool for multiple geochemistry and geophysical data assets.
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Mineral resource occurrence data covering the world, most thoroughlywithin the U.S, though this dataset has been cliped from it's original extent to the extent of the state of Wyoming. This database contains the records previously provided in the Mineral Resource Data System (MRDS) of USGS and the Mineral Availability System/Mineral Industry Locator System (MAS/MILS) originated in the U.S. Bureau of Mines, which is now part of USGS. The MRDS is a large and complex relational database developed over several decades by hundreds of researchers and reporters. This product is a digest in which the fields chosen are those most likely to contain valid information.
Categories: Data;
Types: Downloadable;
Tags: Federal Government,
MRDS,
North America,
US Geological Survey,
USGS, All tags...
boundaries,
economic geology,
economy,
geoscientificInformation,
inlandWaters,
mine sites,
mineral deposit areas,
mineral resources,
transportation, Fewer tags
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