A Collaborative, Biogeochemical Study of the Jurassic Lower Oxford Clay, England

该项目是对该盆地的同位素地球化学研究， 侏罗纪海相下牛津粘土。 它的目标是了解 沉积微生物过程及其对保存的影响 有机和无机相中的碳、氮和硫， 这些微生物作用与沉积之间的关系 环境. 特定微生物过程的影响以及 将查明它们普遍存在的环境。 这些岩石中有机硫化合物的分析结果 应该提供新的信息，这些化合物的作用， 碳硫铁系统 本研究的样品是从2004年的活跃采石场收集的。 英格兰中部 采石场的暴露允许获得 大而新鲜的未成熟富含有机碳的泥岩样本 代表所有地层层位和生物相的样品， 与脊椎动物专家合作获得， 下牛津粘土的无脊椎动物古生态学。 测量 (i)将包括碳、氧和硫的同位素组成 该单元中广泛且保存完好的生物矿物;（ii） 有机质的碳、氮同位素组成 （三）在法律上的效力和效力; 单个分子化石的同位素组成（即， 生物标志物）;以及（iv）丰度和硫同位素组成 有机硫化合物和黄铁矿。 结果应提供 独特的埋藏信息

The project is detailed isotopic biogeochemical study of the Jurassic marine Lower Oxford Clay. Its goal is to understand sedimentary microbial processes and how they affect preservation of carbon, nitrogen and sulfur in organic and inorganic phases and the relationship between those microbial processes and depositional environments. Effects of specific microbial processes and the environments in which they are prevalent will be identified. Results of analyses of organic-sulfur compounds in these rocks should provide new information on the role of these compounds in the carbon-sulfur-iron system. Samples for this study were collected from active quarries in central England. The quarry exposures allowed acquisition of large, fresh samples of this immature, organic-carbon-rich mudrock. The samples, representing all stratigraphic horizons and biofacies, were obtained in collaboration with experts on the vertebrate and invertebrate paleoecology of the Lower Oxford Clay. Measurements (i) will include carbon, oxygen and sulfur isotopic compositions of the extensive and well preserved biominerals in this unit; (ii) carbon and nitrogen isotopic compositions of the organic materials preserved in the bones and shells; (iii) abundances and carbon- isotopic compositions of individual molecular fossils (i.e., biomarkers); and (iv) abundances and sulfurisotopic compositions of organic sulfur compounds and pyrite. The results should provide unique taphonomic information.