Sulphur isotope signature across the Early-Middle Cambrian boundary interval and its potential for the reconstruction of seawater and climate evolution, and the intercontinental correlation

继续目前非常成功的调查硫同位素的下-中寒武统的继承，但特别是该项目的扩展到多个硫同位素（32 S，33 S，34 S和36 S）的碳酸盐相关的硫酸盐（CAS），铬可还原硫（CRS），和有机结合硫（OBS）的同时代分析提供了一个独特的数据集，为这个时间间隔的创建。这将使发展的硫循环和海洋成分的变化，以及它们对下-中寒武纪的古生态和古气候条件的影响的定性和定量的了解。对西冈瓦纳（西班牙、法国）、东冈瓦纳（澳大利亚）、西伯利亚、劳伦蒂亚和东阿瓦隆尼亚碳酸盐岩和混合碳酸盐-硅质岩序列的硫和碳同位素的系统研究将进一步提供有价值的代用指标，代表下-中寒武统界线层段化学地层对比的重要潜力。

A continuation of the current very successful investigations of sulphur isotopes of Lower–Middle Cambrian successions, but, especially the extension of the project to the coeval analyses of multiple sulphur isotopes (32S, 33S, 34S, and 36S) of carbonate associated sulphate (CAS), chromium reducible sulphur (CRS), and organically bound sulphur (OBS) offers the creation of a unique data set for this time interval. This would allow developing a qualitative and quantitative understanding of changes in the sulphur cycle and in the oceanic composition, and their effects to palaeoecologic and palaeoclimatic conditions of the Lower–Middle Cambrian. The systematic investigation of sulphur and carbon isotopes from carbonate and mixed carbonate-siliciclastic successions of West Gondwana (Spain, France), East Gondwana (Australia), Siberia, Laurentia, and East Avalonia will further deliver valuable proxies, representing an important potential for chemostratigraphic correlation of the Lower–Middle Cambrian boundary interval.