Shah, Anjana K.

About the author

ORCID: 0000-0002-3198-081X
Aeromagnetic surveying, Aeroradiometric surveying, Aluminum, Antimony, Arsenic, Atomic absorption analysis, Atomic emission spectroscopy, Barium, Bedrock geologic units, Beryllium, Bismuth, Boron, Bouguer anomaly, Bulk density, Cadmium, Calcium, Carbon, Catalogs and indexes, Cerium, Cesium, Chromatography, Chromium, Cobalt, Copper, Critical minerals, Datasets, Dysprosium, Economic geology, Electromagnetic surveying, Erbium, Erosion, Europium, Field inventory and monitoring, Free-air anomaly, Gadolinium, Gallium, Geochemistry, Geologic history, Geologic maps, Geologic structure, Geophysics, Geospatial datasets, Germanium, Gravimeter measurement, Gravitational field (earth), Hafnium, Holmium, Igneous rocks, Indium, Interagency programs, Iridium, Iron, Isostatic anomaly, Lanthanide series elements, Lanthanum, Lead, Lithium, Lutetium, Magnesium, Magnetic field (earth), Magnetic susceptibility, Manganese, Mass spectroscopy, Metallic mineral resources, Mine waste, Mineral deposits, Mineral resources, Molybdenum, Natural resource exploration, Neodymium, Neutron activation analysis, Nickel, Niobium, Osmium, Oxygen content (water), Palladium, Partnerships, Phosphorus, Platinum, Potassium, Praseodymium, Promethium, Radioactivity, Radiometric dating, Radon, Rare earth elements, Remanent magnetism, Resistivity, Rhodium, Rubidium, Ruthenium, Samarium, Sand deposits, Scandium, Sedimentation, Selenium, Silicon, Silver, Soil chemistry, Spatial analysis, Statistical analysis, Streamflow, Strontium, Study areas, Sulfur, Tantalum, Terbium, Thallium, Thorium, Thulium, Tin, Titanium, Transect sampling, Tungsten, Unconsolidated deposits, Uranium, Vanadium, Water chemistry, Water pH, Water temperature, X-ray fluorescence, Ytterbium, Yttrium, Zinc, Zirconium, Mine sites, Mineral deposit areas, Sand, Copper, Gold, Molybdenum, ERDAS Imagine grid format, ESRI Spatial Analyst binary grid format, GeoTIFF, Grid exchange format, KML, Microsoft Excel format, NetCDF, Portable Document Format, TIFF, Columnar text, Comma-delimited text, File geodatabase (Esri), Shapefile, Rare earths

Airborne Geophysical Surveys over the 2011 Mineral, Virginia Earthquake Area

Gravity, magnetic, and radiometric data obtained in airborne surveys conducted in 2012 with a flight line spacing of 200m and nominal height above ground 125m. Data are provided in GXF grid, GeoTiff, and CSV formats.

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Airborne Geophysical Surveys over the Eastern Adirondacks, New York State

Airborne geophysical surveys were conducted in this area in 2015 with a nominal survey height above ground of 200 meters and flight line spacing 250 meters. Includes magnetic and radiometric (gamma spectrometry) data from those surveys. Data are provided in Geotiff and CSV formats.

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Depth to basement and thickness of unconsolidated sediments for the western United States—Initial estimates for layers of the U.S. Geological Survey National Crustal Model

We present numeric grids containing estimates of the thickness of unconsolidated sediments and depth to the pre-Cenozoic<br>basement for the western United States. Values for these grids were combined and integrated from previous studies or derived<br>dir

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Oklahoma airborne magnetic surveys

Flight line data from airborne surveys conducted in 2017, provided in comma-separated values (csv format). Three areas were flown along a draped surface with a nominal survey height above ground of 120 meters. The flight line spacing for these areas was 200 to 400 m for Area 123, in southwestern Oklahoma; 1000 m for Area 4, in northwestern Oklahoma, and 800 m for Area 5, in north-central Oklahoma.

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Petrophysical data collected on outcrops and rock samples from the eastern Adirondack Highlands, New York

Density and magnetic susceptibility measurements made on rocks and outcrops in this area. Data are provided in CSV format.

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Airborne magnetic and radiometric survey, Charleston, South Carolina and surrounds, 2019

Digital flight line data for a high-resolution airborne magnetic and radiometric survey over Charleston, South Carolina and the surrounding region. Data packages in CSV format, TIFF images provided as well.

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Principal facts of gravity data collected in and around the eastern Adirondack highlands, northern New York

Gravity data were collected in 2016 and 2017 to assist in mapping subsurface geology in this area, where there are numerous iron-oxide apatite deposits which contain rare-earth elements. Data are provided in CSV format.

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Mapping critical minerals from the sky

Critical mineral resources titanium, zirconium, and rare earth elements occur in placer deposits over vast parts of the U.S. Atlantic Coastal Plain. Key questions regarding provenance, pathways of minerals to deposit sites, and relations to geologic featu

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Airborne magnetic and radiometric survey, Columbia, South Carolina and surrounds, 2020

Digital flight line data for a high-resolution airborne magnetic and radiometric survey with goals of better understanding placer deposits containing critical mineral resources titanium, zirconium, and rare earth elements and of imaging the crystalline basement partly buried beneath Atlantic Coastal Plain sediments. Data are provided in CSV (magnetic) and netCDF (radiometric) formats as well as GeoTIFF images.

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Airborne magnetic and radiometric survey, Munsungun region in northern Maine, 2021

Digital flight line data for a high-resolution airborne magnetic and radiometric survey over this area to better understanding volcanogenic massive sulfide mineral deposits, sediment hosted manganese deposits, and their surrounding geologic framework. Data are provided in CSV and GeoTiff formats.

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Ground-based gamma spectrometry data collected in northern Maine

Radiometric (gamma spectrometry) measurements made during walking surveys in this area. Data were collected over and in the vicinity of a radiometric thorium anomaly identified via an airborne survey. Data are provided in CSV format.

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Deposit model for heavy-mineral sands in coastal environments

Sedimentary deposits of dense minerals that accumulate with sand, silt, and clay in coastal environments, locally forming economic concentrations of the heavy miner­als.

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Digital geologic map of the Elizabethtown Quadrangle, Essex County, New York

Digitized shapefiles representing surface geologic features depicted in Matthew S. Walton's unpublished 1960 geologic map of this area. Includes geologic units representing Precambrian basement rock, geologic structures, diabase dikes, mine shaft locations, and water bodies. Data are provided in shapefile and GeoTiff formats. Notes from the original map are provided in PDF format.

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Geochemistry of ore, host rock, and mine waste pile samples of iron oxide-apatite (IOA) deposits of the eastern Adirondack Highlands, New York, in relation to potential rare earth elements resources, 2016-2018

A geochemical database for a regional subset of IOA ore and mine waste products, created because the apatite in these mineral deposits may also host rare earth elements. Data are provided in CSV format.

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Geological analysis of aeromagnetic data from southwestern Alaska: implications for exploration in the area of the Pebble porphyry Cu-Au-Mo deposit

Aeromagnetic data are used to better understand the geology and mineral resources near the Late Cretaceous Pebble porphyry Cu-Au-Mo deposit in southwestern Alaska. The reduced-to-pole (RTP) transformation of regional-scale aeromagnetic data shows that the

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Coastal deposits of heavy mineral sands; Global significance and US resources

Ancient and modern coastal deposits of heavy mineral sands (HMS) are the principal source of several heavy industrial minerals, with mining and processing operations on every continent except Antarctica. For example, HMS deposits are the main source of ti

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Sedimentary exhalative (sedex) zinc-lead-silver deposit model

This report draws on previous syntheses and basic research studies of sedimentary exhalative (sedex) deposits to arrive at the defining criteria, both descriptive and genetic, for sedex-type deposits. Studies of the tectonic, sedimentary, and fluid evolut

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First steps of integrated spatial modeling of titanium, zirconium, and rare earth element resources within the Coastal Plain sediments of the southeastern United States

This report summarizes the assembly of pertinent data, determination of its limits, analysis of its properties, and the relations among the different data types in preparation for future modeling.

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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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Geophysical and geochemical data from the area of the Pebble Cu-Au-Mo porphyry deposit, southwestern Alaska: Contributions to assessment techniques for concealed mineral resources

Uninterpreted geophysical measurements and geochemical and mineralogical analytical data from samples collected during the summer field seasons from 2007 to 2010. Data are available in a single Geographic Information System (GIS) database.

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Airborne Geophysical Survey Inventory of the Conterminous United States, Alaska, Hawaii, and Puerto Rico (ver. 3.0, November 2021)

Compilation of airborne geophysical surveys (magnetic, radiometric, and electromagnetic) with links, for each survey to the data, metadata, and preview images. Includes a measure of quality indicating which surveys are likely most useful for investigations of subsurface mineral deposits. Data are provided in Esri file geodatabase, shapefile, and CSV formats.

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Focus areas for data acquisition for potential domestic resources of 13 critical minerals in the conterminous United States and Puerto Rico—Antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadiu

The Earth Mapping Resources Initiative (Earth MRI) is conducted in phases to identify areas for acquiring new geologic framework data to identify potential domestic resources of the 35 mineral materials designated as critical minerals for the United State

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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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