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The current database consists of location 9,032 entries. The surface-based, point data include 5,272, 6,939, and 903 density, magnetic susceptibility, and NRM measurements, respectively. Downhole data from 146 drillcore have also been incorporated, yielding an additional 1,145 and 9,622 measurements of density and magnetic susceptibility, respectively. Geologic interpretation of gravity and magnetic anomaly data in a given area is greatly enhanced if density, magnetic susceptibility (MS) and natural remanent magnetization (NRM) data are available for representative rock-types (Chandler and others, 2008). Along with geologic information from outcrop and drill-holes, rock property data help relate geophysical anomaly...
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Magnetic susceptibility was measured on outcropping rock in the eastern Adirondack Mountains, New York. A Terraplus KT-20 was used for the measurements. The corresponding rock type was identified using standard field geologic approaches. Locations of the outcrops were determined using a handheld GPS.
DDH E-1-4 Magnetic Susceptibility Graph, hand drawn on graph paper
Magnetic Susceptibility Graph, photocopy
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This report provides detailed (1:63,360-scale) mapping of the Tanana A-1 and A-2 quadrangles (500 square miles; equivalent to eight 7.5-minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the south of the Tanana B-1 Quadrangle. This report includes detailed bedrock, surficial, structural, and stratigraphic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the report also includes derivative maps of geologic construction materials and geologic hazards. The Tanana A-1 and A-2 Quadrangles and surrounding area comprise several isolated mountainous ridges in the western Yukon-Tanana Upland...
Tags: 40Ar/39Ar, Aerial Photography, Aeromagnetic Map, Aeromagnetic Survey, Age Dates, All tags...
Magnetic Susceptibility Graph, hand drawn on graph paper
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The datasets consist of principal fact information of gravity data and density and magnetic properties of hand samples in the Chico and Willows 1:100,000-scale quadrangles, California.
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This data set includes a GIS geologic map database of an EarlyProterozoic metavolcanic and metasedimentary terraneextensively intruded by Early and Middle Proterozoic graniticplutons. Laramide to Tertiary deformation and intrusion offelsic plutons have created numerous small mineral depositsthat are described in the tables and are shown on the figuresin the accompanying text pamphlet. Also included in thepamphlet are numerous chemical analyses of igneous and meta-igneous bodies of all ages in tables and in summary geochemicaldiagrams. The text pamphlet also contains a detaileddescription of map units and discussions of the aeromagneticsurvey, igneous and metmorphic rocks, and mineral deposits. Theprinted map sheet...
DDH E-6-1 Magnetic Susceptibility Graph, hand drawn on graph paper
Magnetic Susceptibility Graph, hand drawn on graph paper
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Petrophysical data were collected in the eastern Adirondack Highlands during several field campaigns in 2016-2017. This data release provides magnetic susceptibility, gamma spectrometry, and density measurements on rock outcrops, hand samples, and during walking surveys. Rock types for the outcrops and samples were identified using standard field methods. Locations of the outcrops or samples were determined using a handheld GPS.
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Regional surface elevation grid files (provided in Grid eXchange File format) were used to study crustal architecture beneath the Southern Midcontinent (USA) by McCafferty and others (2019). The study covered a rectangular, multi-state area of 924 by 924 kilometers centered on Missouri, and a corresponding volume extending from the topographic surface to a depth of 50 kilometers below sea level. The grid files (magnetic field observation surface, topographic surface, Precambrian basement surface, and Moho interface) were used to construct templates and initial physical property models for 3D inversions. A masked version of the Precambrian basement surface grid was used to remove inverted densities and magnetic susceptibilities...
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The U.S. Geological Survey (USGS) collected rock physical property measurements to help understand causative sources of gravity and magnetic survey anomalies in the Iron Mountain-Menominee region, Michigan-Wisconsin. A total of 2,356 measurements of magnetic susceptibility and density from 152 locations have been conducted on Precambrian rocks. The measurements aid in interpretation of newly acquired ground-based gravity and airborne magnetic data that are helping to understand concealed Precambrian geology and potential mineral resources. Multiple measurements were made at each location and sample lithology units were derived from existing USGS geologic maps noted in the supplemental information section of the...
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This report provides detailed (1:63,360-scale) mapping of the Tanana B-1 Quadrangle (250 square miles; equivalent to four 7.5 minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the north of the Tanana A-1 and A-2 Quadrangles. This report includes detailed bedrock, 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.
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Relatively few studies have examined the ecological and biogeochemical effects of livestock grazing in southeastern Utah. In this study, we evaluated how grazing has affected soil organic carbon and nitrogen to a depth of 50 cm in grasslands located in relict and actively-grazed sites in the Canyonlands physiographic section of the Colorado Plateau. We also evaluated differences in plant ground cover and the spatial distribution of soil resources. Results show that areas used by domestic livestock have 20% less plant cover and 100% less soil organic carbon and nitrogen compared to relict sites browsed by native ungulates. In actively grazed sites, domestic livestock grazing also appears to lead to clustered, rather...


map background search result map search result map Biogeochemical and ecological impacts of livestock grazing in semi-arid southeastern Utah, USA Collection of rock properties database from MN Geologic and aeromagnetic maps of the Fossil Ridgearea and vicinity, Gunnison County, Colorado Sediment Magnetic and Paleomagnetic Data from Buck Lake, Oregon Geologic map of the Tanana A-1 and A-2 quadrangles, central Alaska Interpretive geologic bedrock map of the Tanana B-1 Quadrangle, Central Alaska E.K. Lehmann Document 553: Magnetic susceptibility graph E.K. Lehmann Document 559: Magnetic susceptibility graph E.K. Lehmann Document 563: Magnetic susceptibility graph E.K. Lehmann Document 554: Magnetic susceptibility E.K. Lehmann Document 1358: Magnetic susceptibility graph Petrophysical data collected on outcrops and rock samples from the eastern Adirondack Highlands, New York Magnetic susceptibility measurements on outcrops in the eastern Adirondack Highlands, New York Gravity and physical property data in the Chico and Willows 1:100,000-scale quadrangles, California Elevation surface grids for the southern midcontinent Density and magnetic susceptibility measurements on Precambrian rocks in the Iron Mountain-Menominee region, Michigan-Wisconsin Geologic and aeromagnetic maps of the Fossil Ridgearea and vicinity, Gunnison County, Colorado Magnetic susceptibility measurements on outcrops in the eastern Adirondack Highlands, New York Interpretive geologic bedrock map of the Tanana B-1 Quadrangle, Central Alaska Petrophysical data collected on outcrops and rock samples from the eastern Adirondack Highlands, New York Geologic map of the Tanana A-1 and A-2 quadrangles, central Alaska Biogeochemical and ecological impacts of livestock grazing in semi-arid southeastern Utah, USA Density and magnetic susceptibility measurements on Precambrian rocks in the Iron Mountain-Menominee region, Michigan-Wisconsin Gravity and physical property data in the Chico and Willows 1:100,000-scale quadrangles, California Collection of rock properties database from MN Elevation surface grids for the southern midcontinent