... are characterized by elevated Cu contents (up to 283 ppm). The catagenetic celestine is characterized by low Sr/Ba ratios, which, along with the data on the isotopic composition of sulfur of celestine (δ 34 S = 24.8‰) and with the presence of pyrite inclusions in gypsum, indicate widespread sulfate reduction...

...Anna Johnson; Rajdeep Dasgupta; Gelu Costin; Kyusei Tsuno Abstract Sulfur (S) in the mantle is conventionally assumed to be exclusively stored in accessory sulfide phases, but recent work shows that the major silicate minerals that comprise >99% of the mantle could be capable of hosting trace...

... at the Tuoyan in situ Analysis Lab in Guangzhou, China. Pyrite and pyrrhotite grains were selected for sulfur isotope analysis at the Beijing Research Institute of Uranium Geology, China, using a Thermo Finnigan MAT 251 mass spectrometer. In situ spot analysis of sulfur isotope has high spatial resolution...

.... Supplementary material: Supplementary materials, including Texts 1 and 2 entitled ‘Isocon Analyses Techniques' and ‘Geochemistry of alteration minerals – biotite and chlorite', respectively, two figures – ‘Oxygen isotopes of magnetite samples from Surda Cu deposit and other deposits' and ‘Sulfur-isotopic...

... proposed that As enrichment in the pyrite lattice can effectively accelerate fluid-mediated pyrite dissolution, since the formation of sulfur vacancies preferentially proceeds in the vicinity of arsenic ( Blanchard et al., 2007 ). These high-impurity concentrations provide a driver for the replacement...

... than Py2 (6.6 ‰ ). Sulfur primarily derives from MOR basalt (MORB) and seawater sulfate, of which the proportion of sulfur from seawater sulfate is between 20.5 and 47.6 % . Textures, mineral assemblages, and trace element contents of sulfides indicate that the degree of mixing between hydrothermal...

... as their potential to host valuable metals (PGEs + Ni-Cu-Co). The study investigates the source of sulfur, the fractionation of precious metals between sulfide phases including subsequent alteration assemblages, and the textures and distribution of these minerals, as well as approximating the R factor of the system...

...Jackie M. Kleinsasser; Brian A. Konecke; Adam C. Simon; Paul Northrup; Antonio Lanzirotti; Matthew Newville; Camelia Borca; Thomas Huthwelker; Francois Holtz Abstract The synchrotron technique of micro X-ray absorption near-edge structure spectroscopy at the sulfur K -edge (S-XANES) provides...

... as the standard sample. Figure 6. Petrographic and sulfur isotopic characteristics of pyrite (Py) in the Yanchang Formation organic-rich shales. (A, B) Micrographic images of scanning electron microscopy (SEM) showed that scattered Py distributed together with organic matter (OM) and authigenic quartz (AQ...

... to have contributed to the Paleozoic oils in the cratonic region of the Tarim Basin, including the Cambrian–Lower Ordovician and Middle–Upper Ordovician strata ( Zhang et al., 2000 ; Cai et al., 2009a ; M. Li et al., 2010 ). Biomarkers, polycyclic aromatic hydrocarbons (PAHs), and carbon and sulfur...

.... Pyrite in veins within The Aird marble has a sulfur isotope composition depleted in 34 S (−16.6 to −15.5‰), suggesting a biogenic origin. Elsewhere in The Aird and in surrounding fenitized rocks, 34 S-enriched pyrite has sulfur isotope compositions between 6.1 and 7.7‰, outside the sulfur isotopic...

... various vertebrates during this period. Specifically, the salinity of environments spanning fresh to shallow marine water is difficult to discern from sedimentological and paleontological analyses alone. Here, we analyze rare earth elements and yttrium (REY) as well as stable oxygen and sulfur isotope...

... al., 1998 ; Gill et al., 2011 ). This event is accompanied by near-synchronous excursions in δ 34 S CAS (carbonate associated sulfate) and δ 34 S pyr (pyrite), which together record a significant disturbance in the global carbon-sulfur cycle, indicating increased burial of both organic matter...

...T.A. Velivetskaya; A.V. Ignatiev; S.V. Vysotskiy; A.V. Aseeva Abstract ––We have studied sulfur isotope ratios ( 33 S/ 32 S, 34 S/ 32 S, and 36 S/ 32 S) archived in the volcanic and ferruginous rocks of the Sumozero–Kenozero (ca. 2.9 Ga) and Kostomuksha (ca. 2.7 Ga) greenstone belts...

... reference materials for the determination of sulfur isotopic composition of pyrite using in situ techniques. Additionally, we also investigated the matrix effects of nickel in pyrite on the measurement of 34 S/ 32 S by SIMS, and a preliminary equation of Δ 34 S (‰) = –0.59 × Ni (wt%) 0.27 (R 2 = 0.3), where...

..., respectively. The δ 34 S of chalcopyrite separates range from –3.9 to –0.6 ‰ , bornite separates vary from –1.8 to 1.1 ‰ , and bornite-chalcopyrite mixtures yield –1.3 and 0.6 ‰ , mostly consistent with a magmatic sulfur origin. The sulfides are hosted by coarse-grained plagioclase amphibolite and hornblende...

...Alexander J. Krause; Graham A. Shields; Robert J. Newton; Benjamin J. W. Mills Abstract Understanding the long-term variations in seawater sulfate concentrations ([SO 4 2− ] sw ) is crucial to our understanding of the dynamic relationships between the sulfur, carbon, calcium and oxygen cycles...

... to +8.2‰ for galena, +5.9 to +6.2‰ for sphalerite, +1.4 to +3.4‰ for chalcopyrite and +15.0 to +17.4‰ for bayite are compatible with a predominant thermochemical sulphate reduction process, and with sulphur sourced from Triassic seawater. Galena samples have a homogeneous Pb isotopic composition...

... and ±0.2‰ for δ 18 O. Sulfur isotope compositions were measured at the Beijing Research Institute of Uranium Geology. Approximately 15 mg of sulfide minerals (<80 mesh) from the early and late-stage veins ( n = 50) or 30 mg of whole-rock powders (<200 mesh) from wall rocks ( n = 6) without...

... for quartz oxygen isotopes and sulfide sulfur isotopes, combined with apatite U-Pb age and fluid inclusion data, to provide insights into the source and evolution of ore fluids of the Poshan Ag-Pb-Zn vein deposit in the Qinling orogen, central China. Quartz-carbonate-sulfide veins at Poshan are hosted...