Ponce, David A.

About the author

ORCID: 0000-0003-4785-7354
Aeromagnetic surveying, Aeroradiometric surveying, Aluminum, Bouguer anomaly, Bulk density, Carbon, Cerium, Cobalt, Critical minerals, Drilling and coring, Dysprosium, Earth material properties, Economic geology, Erbium, Europium, Free-air anomaly, Gadolinium, Geologic maps, Geologic structure, Geology, Geophysics, Geospatial datasets, Gravimeter measurement, Gravitational field (earth), Holmium, Interagency programs, Iridium, Isostatic anomaly, Lanthanide series elements, Lanthanum, Lithium, Lutetium, Magnetic field (earth), Magnetic susceptibility, Magnetic susceptibility analysis, Magnetometer measurement, Magnetotelluric surveying, Maps and atlases, Mathematical modeling, Metallic mineral resources, Mineral resources, Natural resource exploration, Navigational data, Neodymium, Niobium, Osmium, Palladium, Partnerships, Platinum, Plutonic rocks, Potassium, Praseodymium, Promethium, Radioactivity, Rare earth elements, Remanent magnetism, Rhodium, Rocks and deposits, Ruthenium, Samarium, Scandium, Stratigraphic sections, Structure contours, Study areas, Tantalum, Terbium, Thorium, Thulium, Titanium, Tungsten, Uranium, Ytterbium, Yttrium, Faults, Mineral deposit areas, Volcanoes, Dolostone, Gneiss, Granite, Granitoid, Granodiorite, Intrusive carbonatite, Limestone, Quartzite, Sandstone, Syenite, Volcanic rock, ARC/INFO grid export format, ArcInfo interchange, Geosoft database (binary), Geosoft grid format, Grid exchange format, MTH5 format, Microsoft Excel format, Portable Document Format, Columnar text, Comma-delimited text, File geodatabase (Esri), Shapefile, Tab-delimited text, Rare earths

Gravity map of Nevada

Gravity observations throughout Nevada combined to provide a consistent collection of point measurements and generate maps.

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Principal facts for gravity data along the Hayward fault and vicinity, San Francisco Bay area, northern California

Data and associated physical property measurements were collected as part of on-going studies to help determine the earthquake hazard potential of major faults within the San Francisco Bay region

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Geophysical investigations of the Smoke Creek Desert and their geologic implications, northwest Nevada and northeast California

Gravity and aeromagnetic data analysis described in a report, with a few physical property analyses

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Gravity, magnetic, and physical property data in the Smoke Creek Desert area, Northwest Nevada

Aerial, truck-towed, and hand-held magnetometer measurements, gravity station data, and sample density and magnetic susceptibility measures

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Geophysical studies in the vicinity of the Warner Mountains and Surprise Valley, northeast California, northwest Nevada, and southern Oregon

Gravity station data and physical property measurements used to infer subsurface geologic structure

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Physical-property measurements on core samples from drill-holes DB-1 and DB-2, Blue Mountain Geothermal Prospect

Density and magnetic susceptibility measurements to assist in interpretation of gravity and magnetic anomaly data

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Geophysical and geologic maps of Mountain Pass and vicinity, California and Nevada

U.S. Geological Survey Scientific Investigations Map 3412 is a series of products that consists of geophysical and geologic maps of Mountain Pass and vicinity, California. Maps A and B (red outline in above map image) are gravity and aeromagnetic maps, re

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High-Resolution Aeromagnetic Survey of Mountain Pass, California

Aeromagnetic survey data from this area flown in 2016. This helicopter survey was flown at a flight-line spacing of 100 and 200 m, nominal elevation above ground of 70 m, for about 1,814 line-kilometers. Data are provided in GXF and shapefile formats.

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Isostatic gravity map of Mountain Pass and vicinity, California and Nevada

Gravity investigations of Mountain Pass and vicinity were begun as part of an effort to study regional crustal structures as an aid to understanding the geologic framework and mineral resources of the eastern Mojave Desert. The study area, which straddles

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Airborne radiometric maps of Mountain Pass, California

Geophysical investigations of Mountain Pass and vicinity were begun as part of an effort to study regional crustal structures as an aid to understanding the geologic framework and mineral resources of the eastern Mojave Desert. The study area encompasses

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High-Resolution Airborne Radiometric Survey of Mountain Pass, California

Data obtained from a detailed airborne radiometric survey of this area flown by helicopter at a flight-line spacing of 100 and 200 m, a flight-line azimuth of 70 degrees, a nominal flight-line elevation above ground of 70 m, over about 1,814 line-kilometers. Radioelement data are presented for potassium (K), equivalent thorium (eTh), and equivalent uranium (eU). Data are provided in GXF format.

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Airborne magnetic and radiometric survey of the southeast Mojave Desert, California and Nevada

Digital flight-line aeromagnetic and aeroradiometric survey data over of the southeast Mojave Desert, parts of California and Nevada. Data files are provided in CSV as well as Geosoft binary database and grid exchange format (GXF).

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Density and magnetic properties of selected plutons (granitoids) in the Great Basin, parts of California, Nevada, Oregon, Utah, and Arizona

Physical property measurements rocks from this area, including station identifier, geographic coordinates, rock type, density, magnetic susceptibility, remanent magnetization, declination, and inclination where available. Data are provided in CSV format. Sample locations are provided in shapefile format.

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Density and Magnetic Properties of Selected Rock Samples from the Western U.S. and Alaska

Physical properties (density, magnetic susceptibility, and remanent magnetism) from 20,000 rock samples. Data are provided in CSV format.

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High-Resolution Airborne Gravity Gradiometry, Magnetic, and Radiometric Data of Mountain Pass, Southeast Mojave Desert, California

Detailed airborne gravity gradiometry, magnetic, and radiometric survey data for this area flown with flight-line spacing of 100 and 200 m, nominal flight-line elevation above ground of 70 m, for about 1,814 line-kilometers. Data are provided in CSV and Geosoft database (.gdb) format. Gravity and hillshade are in GXF grids.

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Principal facts for gravity stations in the Antelope Valley-Bedell Flat area, west-central Nevada

Physical property data for selected rock samples accompany these gravity observations

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Principal facts for gravity stations in the Dry Valley area, West-Central Nevada and east-central California

Gravity measurements used for determining geologic structure to aid in understanding ground-water flow

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Magnetic and gravity studies of Mono Lake, east-central, California

Magnetic and gravity investigations were undertaken in Mono Lake to study regional crustal structures and to aid in understanding the geologic framework, in particular regarding potential geothermal resources and volcanic hazards throughout Mono Basin.

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Gravity and magnetic studies of the eastern Mojave Desert, California and Nevada

Report with generalized interpretation and Excel tables of gravity and physical property data including an explanations of their formats.

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Whole Rock Density, Magnetic Susceptibility, and Radiometric Measurements of a Rare Earth Element Terrane, Southeastern Mojave Desert.

Rock property measurements including density, magnetic susceptibility, and radiometric concentrations to understand structural and geophysical relationships associated with rare earth element mineral deposits. Data are provided in CSV format.

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Aeromagnetic survey of the Amargosa desert, Nevada and California

Grid data files along with maps in PDF and PostScript accompany this report

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Summary of geophysical investigations of the Death Valley regional water-flow modeling project, Nevada and California

Magnetic and gravity anomaly and structure contour data

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Nevada magnetic and gravity maps and data

Aeromagnetic surveys of Nevada, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats.

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Magnetotelluric data from Mountain Pass, California, 2015

Magnetotelluric (MT) data from 65 stations collected in 2015 in this area create a regional conductivity model near the Mountain Pass mine.

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Geophysical terranes of the Great Basin and parts of surrounding provinces

A set of geophysical maps with anomalies that are labeled and keyed to tables containing information on each anomaly and its source.

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Gravity and magnetic data along a seismic refraction-reflection line in northwest Nevada and northeast California

Report with gravity station data in a spreadsheet

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Aeromagnetic expression of buried basaltic volcanoes near Yucca Mountain, Nevada

Mathematical modeling and analysis of aeromagnetic anomaly data (gridded data provide in another report).

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Geologic and geophysical maps of the Death Valley ground-water model area, Nevada and California

Maps and geospatial data for (a) geology; (b) tectonics; (c) isostatic gravity anomaly; (d) aeromagnetic anomaly; (e) depth to pre-Cenozoic basement.

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Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, titanium, and tungsten

Geographic areas within the US where deposits of certain critical mineral resources might be found. With state agencies and other organizations, USGS intends to conduct studies that will help locate critical mineral resources within these areas.

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Digital geologic map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California, revision 4

GIS data for geologic units and structural features, with aeromagnetic and gravity maps in PDF

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GIS and data tables for focus areas for potential domestic nonfuel sources of rare earth elements

Locations of focus areas to be used for planning and collection of geophysical, geological, and topographic (lidar) data pertaining to the study of rare earth element resources in the US.

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