WebThis model implies that the accumulation of free oxygen in the atmosphere predates 3.5 b.y. ago. SRB were probably more active in Archean oceans than in modern oceans, possibly because the ocean temperatures were about 30–40 °C higher, and more digestible foods were available for SRB. WebWe have studied the oxygen and sulphur isotope geochemistry of sulphides, sulphur, sulphate and water in the field and in experiments to identify sources of oxygen and reaction mechan ...
Multiple Sulfur Isotope Geochemistry of the Precambrian Mafic …
WebSulphur isotope geochemistry of black shale-hosted antimony mineralization, Arnsberg, northern Rhenish Massif, Germany: implications for late-stage fluid flow during the Variscan orogeny ... A detailed sulphur isotope study of the stibnite–sulphosalt mineralization and pyrite from a variety of regional host-rock lithologies has been carried ... WebSulfur isotope ratios of sulfur in a sea shell, sulfides in shallow ocean sediments, sulfate in rain water and in present-day formation of gypsum evaporites from the sea, were … gary shook actuary
Sulphur isotope geochemistry of black shale-hosted antimony ...
Web1 Dec 2024 · Studies of the mineralogy and sulfur isotope composition of sediment-hosted hydrothermal sulfide minerals in cores are important for understanding the seafloor … WebSulfur isotope ratios of sulfur in a sea shell, sulfides in shallow ocean sediments, sulfate in rain water and in present-day formation of gypsum evaporites from the sea, were measured and are compared to the sea water level. The geochemical sulfate cycle is discussed in the light of these results. (auth) Authors: Web11 Apr 2024 · In-situ sulfur isotope analysis of sulfide minerals was performed on polished sections using a Nu Plasma II MC-ICP-MS together with a RESOlution S-155 193-nm excimer ArF laser system hosted at the State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (GPMR-CUG). Pb isotopic compositions of … gary shook realty in twin falls idaho