This dataset is a collection of geochemical data on samples from the Stibnite-Yellow Pine district of Idaho. The datasets include: whole rock geochemistry; lead, strontium and neodymium isotope chemistry of sulfides and whole rock samples by isotope dilution-thermal-mass spectrometry (ID-TIMS); in situ sulfur isotope chemistry of sulfides by laser ablation-multi collector-inductively coupled-mass spectrometry (LA-MC-ICP-MS); electron microprobe (EMP) images, cathodoluminescence (CL) images and spectra, along with EMP and laser ablation-inductively coupled-mass spectrometry (LA-ICP-MS) trace element analysis of sulfides and quartz; and fluid inclusion microthermometry and raman. Samples were collected from the surface and from a series of drill holes transecting the Yellow Pine, Hangar Flats, and West End deposits within the district. Sample were submitted for USGS contract laboratory analysis and processed for ID-TIMS isotopic analysis. High-contrast backscattered electron (BSE) scanning electron microscope SEM imaging were collected to determine zonation, followed by of EMP analysis, followed by a selection of LA-ICP-MS and LA-MC-ICP-MS analysis. After determining mineral and fluid inclusion paragenesis by studying optical petrography and SEM imagery, fluid inclusion microthermometric data and raman spectra were collected.

These data are sulfur isotope determinations (34S/32S ratios) for sulfur-bearing minerals collected from epithermal veins in the Lowland mining district, Montana, USA and from metasedimentary rocks that host the Black Angel zinc-lead-silver deposit, Greenland. The samples were collected by cooperators as parts of larger ore genesis studies. The determinations were performed between February 2019 and March 2021 on 35 samples of pyrite, sphalerite, galena, and chalcopyrite from Lowland vein occurrences and 5 samples of anhydrite from Black Angel host rocks.

These data are sulfur isotope determinations (34S/32S ratios) for sulfur-bearing minerals collected from epithermal veins in the Lowland mining district, Montana, USA and from metasedimentary rocks that host the Black Angel zinc-lead-silver deposit, Greenland. The samples were collected by cooperators as parts of larger ore genesis studies. The determinations were performed between February 2019 and March 2021 on 35 samples of pyrite, sphalerite, galena, and chalcopyrite from Lowland vein occurrences and 5 samples of anhydrite from Black Angel host rocks.

The layered mafic and ultramafic Stillwater Complex in southwest Montana is known for its platinum-group element (PGE) production from reef-style mineralization (J-M Reef) in the Lower Banded series. Rocks near the base of the complex—the Basal series and Ultramafic series, Peridotite zone—also host elevated concentrations of Ni, Cu, Co, Cr, and PGE. These rocks of the complex’s lower stratigraphy were studied in the area just east of the Chrome Mountain summit where magmatic layering is disrupted by the presence of magmatic breccias, heavily serpentinized discordant dunites, pyroxenite pegmatoids, and disaggregated chromitite seams or chromitite schlieren. The geochemistry and mineralogy of these PGE-enriched zones, with variable total sulfide content, were examined to determine the distribution of noble and base metals and processes affecting ore tenors. This release includes three geochemical datasets: 1) drill core assays, 2) high precision PGE and Te, As, Bi, Sb, Se (TABS) bulk rock analytical results, and 3) trace element concentrations of sulfide minerals by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Whole rock PGE concentrations were determined by nickel sulfide fire assay (NiS-FA) tellurium co-precipitation followed by inductively coupled plasma mass spectrometry (ICP-MS) (Savard and others, 2010). Concentrations of TABS for sulfur-poor samples (<3% S) were determined by hydride-generator atomic-fluorescence spectrometry (HG-AFS) (Mansur and others, 2019). Both procedures were performed at LabMaTer, Université du Québec à Chicoutimi (UQAC). Partial drill core assays for one Iron Mountain drill hole and four Chrome Mountain drill holes are included in this release. We report the downhole concentrations of Au, Pt, Pd, S, Se, Te, Cu, Ni, and Cr. Trace element concentrations in pyrrhotite, pyrite, chalcopyrite, cubanite, pentlandite, and pentlandite partially altered to violarite were determined by LA-ICP-MS at LabMaTer. Globular and disseminated sulfides associated with chromitite schlieren at Chrome Mountain and both massive and disseminated sulfides at Iron Mountain were analyzed. References Mansur, E.T., Barnes, S-J., Savard, D., and Webb, P.C., 2019. Determination of Te, As, Bi, Sb and Se (TABS) in Geological Reference Materials and GeoPT Proficiency Test Materials by Hydride Generation‐Atomic Fluorescence Spectrometry (HG‐AFS). Geostandards and Geoanalytical Research, v. 44, p. 147–167, https://doi.org/10.1111/ggr.12289. Savard, D., Barnes, S-J., and Meisel, T., 2010. Comparison between nickel‐sulfur fire assay Te co‐precipitation and isotope dilution with high‐pressure asher acid digestion for the determination of platinum‐group elements, rhenium and gold. Geostandards and Geoanalytical Research, v. 34(3), p. 281–291, https://doi.org/10.1111/j.1751-908X.2010.00090.x.

This data release provides quantitative whole rock geochemical results from The Geysers vapor-dominated geothermal field in California. The concentrations of major elements are reported in oxide weight percent by wavelength dispersive x-ray fluorescence (WDXRF), the concentrations for sixty elements are reported in elemental weight percent (pct) or parts per million (ppm) from inductively coupled plasma-optical emission spectrometry-mass spectrometry ICP-OES-MS analysis, mercury is reported in ppm by cold vapor atomic absorption spectrometry (CVAAS), and ammonium in ppm from automated colorimetry analysis. The analyses show significant enrichment of volatile elements and elements such as sulfur, boron, arsenic, and mercury. Mineral scales from the Northwest Geysers are characterized by high concentrations of ammonium and mercury while the mineral scales from the Central and Southeast Geysers are enriched in boron, iron and sulfur. The mineral scales from orifice plates and condensers contain significant concentrations of Cr, Ni, Co, Zn, and W which are common contaminants from rusted steel equipment.

This data release provides quantitative whole rock geochemical results from The Geysers vapor-dominated geothermal field in California. The concentrations of major elements are reported in oxide weight percent by wavelength dispersive x-ray fluorescence (WDXRF), the concentrations for sixty elements are reported in elemental weight percent (pct) or parts per million (ppm) from inductively coupled plasma-optical emission spectrometry-mass spectrometry ICP-OES-MS analysis, mercury is reported in ppm by cold vapor atomic absorption spectrometry (CVAAS), and ammonium in ppm from automated colorimetry analysis. The analyses show significant enrichment of volatile elements and elements such as sulfur, boron, arsenic, and mercury. Mineral scales from the Northwest Geysers are characterized by high concentrations of ammonium and mercury while the mineral scales from the Central and Southeast Geysers are enriched in boron, iron and sulfur. The mineral scales from orifice plates and condensers contain significant concentrations of Cr, Ni, Co, Zn, and W which are common contaminants from rusted steel equipment.

Stable isotope analyses are reported (the ratios deuterium/hydrogen, carbon-13/carbon-12, oxygen-18/oxygen-16, and sulfur-34/sulfur-32) for ores and related rocks from the Pea Ridge, Lower Pilot Knob, Bourbon, Iron Mountain, and Kratz Spring iron oxide-apatite deposits in southeast Missouri; the Boss iron oxide-copper-gold deposit in southeast Missouri; the Gagaryah stratiform barite deposit in Alaska; the Canyon, Hack II, and Pigeon breccia pipe uranium deposits in Arizona; the Grasberg porphyry copper-gold deposit in Indonesia; metalliferous occurrences in the Castro Basin, southern Brazil; and the White Mountain gold deposit, Jilin Province, China.

Stable isotope analyses are reported (the ratios deuterium/hydrogen, carbon-13/carbon-12, oxygen-18/oxygen-16, and sulfur-34/sulfur-32) for ores and related rocks from the Pea Ridge, Lower Pilot Knob, Bourbon, Iron Mountain, and Kratz Spring iron oxide-apatite deposits in southeast Missouri; the Boss iron oxide-copper-gold deposit in southeast Missouri; the Gagaryah stratiform barite deposit in Alaska; the Canyon, Hack II, and Pigeon breccia pipe uranium deposits in Arizona; the Grasberg porphyry copper-gold deposit in Indonesia; metalliferous occurrences in the Castro Basin, southern Brazil; and the White Mountain gold deposit, Jilin Province, China.

Stable isotope compositions (the ratios deuterium/hydrogen, oxygen-18/oxygen-16, and sulfur-34/sulfur-32) are reported for alunite, jarosite, kaolinite, silica, cinnabar, marcasite, and native sulfur from outcrops in and around the workings of the Sulphur Bank mercury mine, Lake County, California, and chemical compositions are reported, from electron microprobe analyses, for alunite and buddingtonite. Isotope analyses are given also for hydrogen sulfide gas from active fumaroles and for soluble sulfate in samples of mine waste. The waste results reflect fine grained material (particles less than 0.063 millimeter in diameter) that were taken from composites, each composite representing a particular waste pile that was active during a particular period of mining.

Stable isotope compositions (the ratios deuterium/hydrogen, oxygen-18/oxygen-16, and sulfur-34/sulfur-32) are reported for alunite, jarosite, kaolinite, silica, cinnabar, marcasite, and native sulfur from outcrops in and around the workings of the Sulphur Bank mercury mine, Lake County, California, and chemical compositions are reported, from electron microprobe analyses, for alunite and buddingtonite. Isotope analyses are given also for hydrogen sulfide gas from active fumaroles and for soluble sulfate in samples of mine waste. The waste results reflect fine grained material (particles less than 0.063 millimeter in diameter) that were taken from composites, each composite representing a particular waste pile that was active during a particular period of mining.