新疆柯坪地区早古生代地层的碳同位素变化特征及其意义

新疆柯坪地区早古生代地层的碳同位素变化特征及其意义王宗哲，杨杰东（中国科学院南京地质古生物研究所，江苏南京，２１０００８）（南京大学现代分析中心，江苏南京，２１０００８）柯坪地区位于新疆塔里木盆地西北缘，本次研究的区域涉及阿克苏、乌什、柯坪和巴楚一带...

Features of the carbon isotope changes in the Early Palaeozoic rocks of the Kalpin area, Xinjiang and their significance

It is shown by the assaying of the carbon isotope from the marine Cambrian and Ordovician carbonate samples that there were six periods when the negative fluctuation peaks made their appearance, i. e. early Early Cambrian, late Early Cambrian, late Late Cambrian, Early Ordovician Arenigian, Early Caradocian and Middle to Late Caradocian. They are all generally coincident with the global organism extinction events and regression/transgression events, suggesting that these three events had positive connections with each other. Thus, carbon isotopic assaying may be also used as an important method for the global stratigraphic correlation and division.