Filters: Tags: igneous rocks (X) > Types: Citation (X)

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Physical Properties by Geologic Unit in the Southern San Luis Basin, New Mexico Physical properties of geologic units are important for geophysical interpretation because they provide the tie between lithology and geophysical fields. For gravity data, the applicable physical property is bulk density, which is the overall mass per unit volume of rocks, sediments, and their pore spaces. Bulk dry density is the mass per unit volume measured when the sample is dry. Saturated density is the mass per unit volume measured when the sample is saturated with fresh water, which has a density of 1,000 kg/m^3. The two values are commonly compared in order to determine the porosity of a sample, that is, the percentage of the volume that is composed of open space. Density is commonly reported in kilograms... Categories: Data; Types: Citation; Tags: Arroyo Seco, Cerro Negro, Cerro de la Olla, Cerro de los Taoses, El Rito, All tags... Geophysics, New Mexico, Picuris Mountains, Pilar, Questa, Talpa, Town of Taos, Tres Piedras, Tusas Mountains, USGS Science Data Catalog (SDC), bedrock geologic units, bulk density, geophysics, geoscientificInformation, gravitational field (earth), igneous rocks, magnetic field (earth), magnetic susceptibility analysis, metamorphic rocks, porosity, saturated density, sedimentary rocks, surficial geologic units, Fewer tags Geochemical analyses of rock samples collected from mineral deposits and intrusions of the Bokan Mountain peralkaline granitic complex, Prince of Wales Island, southeastern Alaska This data set compiles the major and trace element chemistry of rock samples collected by the U.S. Geological Survey (USGS) at Bokan Mountain, located in the southern part of Prince of Wales Island, southeastern Alaska. Bokan Mountain was formed by an Early Jurassic peralkaline igneous complex that intruded into lower Paleozoic rocks of the Alexander terrane of southeast Alaska. The pluton and surrounding country rocks host numerous mineral deposits and occurrences, including heavy rare earth element (HREE)-rich pegmatites and felsic dikes, as well as mineral deposits rich in uranium, thorium, HREE, and fluorine. The Ross-Adams mine on Bokan Mountain exploited a uranium-thorium deposit intermittently from the late... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Alexander terrane, Bokan Mountain, Energy Resources, Exploration, All tags... Geochemical surveys, Geochemistry, Geochemistry, Igneous rocks, Jurassic, MRP, Mesozoic, Mineral Resources Program, Mineral deposits, Prince of Wales Island, Prospecting, Rare Earth Elements, Southeast Alaska, USA, USA, USGS Science Data Catalog (SDC), United States of America, Uranium, geoscientificinformation, Fewer tags