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.

This data set consists of chemical and stable isotope data obtained through the analysis of discrete water samples collected from 14 fixed sampling locations in the northern Sacramento-San Joaquin Delta at roughly monthly intervals between April 2011 and November 2012.

This data set consists of chemical and stable isotope data obtained through the analysis of discrete water samples collected from 14 fixed sampling locations in the northern Sacramento-San Joaquin Delta at roughly monthly intervals between April 2011 and November 2012.

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.

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.

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.

This dataset includes stable nitrogen-15 and carbon-13 isotope analysis data derived from freshwater aquatic and semi-aquatic primary producers, invertebrates, and fishes collected from five sampling sites (and one pilot site) within the Owens River Gorge, Mono and Inyo counties, CA, USA between 2017 and 2021. These sampling efforts were conducted in conjunction with the California Department of Fish and Wildlife’s fish population surveys and invertebrate monitoring. Fishes sampled were Owens Sucker (Catostomus fumeiventris (Miller, 1973)), hybrid Tui Chub (Siphateles bicolor snyderi (Miller, 1973) x Siphateles bicolor obesa (Girard 1856)), Rainbow Trout (Oncorhynchus mykiss (Walbaum, 1792)) and Brown Trout (Salmo trutta (Linnaeus, 1758)). Invertebrates sampled included 33 taxa and primary producers sampled consisted predominantly of stems and leaves of vascular macrophytes and non-vascular primary producers consisting of 22 taxa. This dataset includes all organism metadata (Dissection_Table.csv, Eye_Table.csv) and N15 and C13 stable isotope analysis data (Isotope_Table.csv) derived from the invertebrates, vegetation, and a representative subset of the fishes collected in this study. These data were collected to assess the effects of restoration flows on aquatic food webs and fish communities in the Owens River Gorge.

This dataset includes stable nitrogen-15 and carbon-13 isotope analysis data derived from freshwater aquatic and semi-aquatic primary producers, invertebrates, and fishes collected from five sampling sites (and one pilot site) within the Owens River Gorge, Mono and Inyo counties, CA, USA between 2017 and 2021. These sampling efforts were conducted in conjunction with the California Department of Fish and Wildlife’s fish population surveys and invertebrate monitoring. Fishes sampled were Owens Sucker (Catostomus fumeiventris (Miller, 1973)), hybrid Tui Chub (Siphateles bicolor snyderi (Miller, 1973) x Siphateles bicolor obesa (Girard 1856)), Rainbow Trout (Oncorhynchus mykiss (Walbaum, 1792)) and Brown Trout (Salmo trutta (Linnaeus, 1758)). Invertebrates sampled included 33 taxa and primary producers sampled consisted predominantly of stems and leaves of vascular macrophytes and non-vascular primary producers consisting of 22 taxa. This dataset includes all organism metadata (Dissection_Table.csv, Eye_Table.csv) and N15 and C13 stable isotope analysis data (Isotope_Table.csv) derived from the invertebrates, vegetation, and a representative subset of the fishes collected in this study. These data were collected to assess the effects of restoration flows on aquatic food webs and fish communities in the Owens River Gorge.

This data release presents geochemical and mineralogical data for mine waste at Sulphur Bank Mercury Mine (SBMM). This work is performed in cooperation with the US Environmental Protection Agency (EPA) to characterize sources of contamination at the SBMM cleanup site. A total of 23 samples were collected: 15 samples were collected by USGS from various waste piles during 2020-21 (14 composites from the top 0-2 centimeters of material, and one composite from six discrete ore hand samples), six composite samples were generated from drill cores from monitoring wells installed by EPA contractor EA Engineering, Science, and Technology, Inc. (EA), in the Waste Rock Dam during 2022. Two additional hand samples - one cinderblock and one scoria - were collected by USGS from the eastern flank of the South waste pile. The 21 composite samples were analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) for trace elements, inductively coupled plasma-optical emission spectroscopy (ICP-OES) for major elements, 5-stage sequential extractions to determine phase associations, semi-quantitative X-ray diffraction (XRD) for mineralogy, EPA Method 3051a for total arsenic and EPA Method 1340 and the California Arsenic Bioaccessibility (CAB) method for relative in vitro arsenic bioaccessibility. The two hand samples were analyzed by ICP-MS for trace elements, ICP-OES for major elements, and semi-quantitative XRD for mineralogy. For composite samples, analyses were performed for two size fractions, S4 (63-250 µm) and S5 (< 63 µm), except for EPA 3051a and 1340 and the CAB test, which were performed on the S3 (< 250 µm) size fraction. The two hand samples were only analyzed for the S5 size fraction. Results are presented for all 23 samples of ore, calcined tailings, waste rock material, Waste Rock Dam drill cores, cinderblock, and scoria collected between November 20, 2020 and June 17, 2022.