Sulphur isotope data for TeaSe Project (NERC grant NE/L001764/1)

Pyrite samples from selected sedimentary organic-rich formations or associated igneous and metamorphic rocks were analysed by conventional S isotopic analysis. Pyrites were measured in order to provide insights into their origin. Light and variable S isotope compositions in pyrite have been used to infer the influence of sulphate-reducing bacteria (and subsequent Se precipitation by sulphate-reducing microbes), whereas heavier S isotope compositions indicate a non-biological origin (i.e. physical and chemical diagenesis).

精选的富含有机质沉积岩层或其相关的火成岩和变质岩中的黄铁矿样本，经传统硫同位素分析进行检测。通过测量黄铁矿，旨在揭示其起源。黄铁矿中的轻硫同位素组成及其变化，已被用于推断硫酸盐还原菌（及其后续通过硫酸盐还原微生物的硒沉淀）的影响，而较重的硫同位素组成则表明其非生物起源（即物理和化学成岩作用）。