【摘要】 根据Sr、C同位素地层学原理,利用胶辽徐淮地区晚前寒武纪地层Sr、C同位素数据,与国际上已有的Sr、C同位素演化曲线对比,结果表明,胶辽徐淮地区晚前寒武纪地层是同一时期的沉积物,沉积主体之间Sr、C同位素比值的对比性很好,沉积时限约在750~860Ma之间,并延续到震旦纪,为北方青白口纪及其后的沉积。同时也表明,Sr、C同位素演化相结合是解决缺乏大化石的晚前寒武纪地层对比的有效方法。更多还原

【Abstract】 Based on Sr and C isotopic sequence stratigraphy, this paper has made a comparison between the Pre-Cambrian Sr and C isotopic data from the Jiao-Liao-Xu-Huai area and the variation curves of Sr and C isotopes available abroad. It is shown that the Precambrian strata in the Jiao-Liao-Xu-Huai area were accumulated in the same period. The Sr and C isotopic ratios show good correlation in this area. The accumulation of the strata occurred from 750 to 860 Ma, and continued to the Sinian. These strata are sediments accumulated after Qingbai- kou period. It is also shown from the comparison that dating with Sr and C isotopes is an effective way to solve the problem of Precambrian stratigraphic correlation in the case of lack of fossils.更多还原