Electron microprobe geochemical data that is used to showcase differences in phosphates when derived from magmatic-hydrothermal systems compared to metamorphic-hydrothermal systems to improve understanding of the mechanisms by which some mineral deposits were formed. Data are provide in CSV format.

Sample locations and descriptions, with compositional analysis to constrain the natural background levels of fibrous amphiboles potentially derived from the nearby Rainy Creek Complex.

Geochemical, x-ray diffraction mineralogical, and electron probe microanalysis (EPMA) data on rocks, soils, and sediments collected near porphyry copper deposits in this area. Data are provided in CSV format.

Descriptions and analytical data (electron microprobe, X-ray diffraction, spectral reflectance, and scanning electron microprobe analyses) for unexpanded and expanded vermiculite samples, a mineral product with commercial applications. Data are provided in CSV format. Descriptions of the samples are provided as PDF reports.

Preliminary information about the concentration, spatial distribution and mineral hosting of metals and other elements in solid materials at the Elizabeth copper mine after 50 years (or more) of weathering and oxidation.

Information related to amphibole and other minerals in order that commercial, regulatory, and other entities may obtain a better understanding of their impact on potential resource development. Data are provided in Microsoft Excel CSV, annotated PDF reports including microphotographs and analytical results, and JPEG formats.

Geochemical, petrographic, and geochronologic data for samples, principally those of unmineralized Tertiary volcanic rocks, from the Tonopah, Divide, and Goldfield mining districts of west-central Nevada.

Hydrothermal orebodies and their host rocks are characterized by compositional variations in magnetite. Minor and trace element data for hydrothermal and igneous magnetite are compared with an unmineralized magnetite-series granodiorite in southwest Japan

Geochemical, geochronologic, and isotopic data for zircons and zircon-hosted melt and mineral inclusions in order to asses the genesis of the Pea Ridge iron oxide-apatite deposit and related centers in this terrane. Data are provided in Microsoft Excel format.

40Ar/39Ar dating, electron microprobe analyses and geologic mapping help clarify chronology and correlations of the numerous volcanic and intrusive units exposed in the area and interpret the petrogenesis of a few of the volcanic units.

Chemical analyses of water and sediment samples, images depicting resistivity.

Alaska is a major producer of base and precious metals and has a high potential for additional undiscovered mineral resources. However, discovery is hindered by Alaska’s vast size, remoteness, and rugged terrain. New methods are needed to overcome t

Cassiterite , a main ore mineral in tin deposits, is suitable for U–Pb isotopic dating because of its relatively high U/Pb ratios and typically low common Pb. We report a LA-ICPMS analytical procedure for U–Pb dating of

In the past decade, use of hyperspectral imaging (imaging spectroscopy) for mineral exploration and mining operations has been increasing at different spatial scales. In this paper, we focus on recent trends in applying imaging spectrometer data to: 1) ai

Results of zircon and monazite U-Pb geochronologic analyses of 24 rock samples collected from mapped exposures identified while conducting new, detailed (1:24,000-scale) geologic or reconnaissance geologic mapping for the new state map of Vermont.

Geological setting, characteristics of the deposit itself, and detailed geochemical analyses of rocks in and around the deposit.

Geochemical and mineralogical analysis of uranium-bearing sandstone in order to help understand mineral deposits of this type.

The Farewell terrane is an exotic continental fragment in interior Alaska that during the early Paleozoic was the site of a passive margin. We report a ²³⁸U/²⁰⁶Pb zircon age of 432.9±3.0 Ma from a Farewell terrane ash in Mt. McKinle

The Cornwall and Devon vein- and greisen-type copper and tin deposits of southwest England are spatially and genetically related to shallow-seated granitic intrusions. These late Variscan intrusions, collectively known as the Cor

U-Pb ages and concentrations of selected trace elements were analyzed in zircon crystals from nine samples of Cenozoic igneous rocks collected in this area. Data are provided in CSV format.