华北块体南缘上元古界氧碳同位素特征及其沉积环境意义  

Geochemical character of C/O isotope of the Upper Proterozoic from southern margin of North China Block and implication for its depositional environment

作　　者：高林志[1] 王自强[2] 张传恒[2] 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《古地理学报》2010年第6期639-654,共16页Journal of Palaeogeography：Chinese Edition

基　　金：中国地质调查局重大项目"中国中新元古代地层年代学标定"(编号:1212010911071)资助

摘　　要：完善中国晚前寒武纪地层的标准剖面,使其成为国际地层对比的参考标准,是中国地质学家的追求。华北蓟县剖面和扬子块体三峡剖面一直被视为中国的标准剖面,多学科的研究、特别是生物地层和雪球事件地层学的研究取得了突破性进展。笔者试图通过化学地层学研究手段,对华北块体南缘豫西地区中—新元古代地层中碳酸盐岩进行氧碳同位素地球化学研究,试图建立新的扬子块体与华北块体震旦纪地层对比桥梁。同时,对华北南缘新元古代碳酸盐岩地层的形成环境进行了分析,解释了华北新元古代冰碛岩的时空关系。The Jixian section in the North China Block and the Yangtze Gorge section in the Yangtze Block are as stratotype sections.The comprehensive research has been achieved,specially,in biostratigraphy and glacial-stratigraphy.The authors try to use geochemical method to study the geochemical stable isotope in the Neoproterozoic carbonate rocks in southern margin of western Henan Province in the North China Block and try to set up a correlation bridge between the Yangtze Block and the North China Block.However,according to the analysis of C/O isotope in the Neoproterozoic carbonate rocks,the litho-genesis environments of those carbonate rocks in southern margin of western Henan in the North China Block were discussed. The C/O isotopic data in different areas were discussed and the space-time glaciations in the Neoproterozoic in North China were explained.

关 键 词：华北块体 豫西 同位素地球化学 新元古代 

分 类 号：P531[天文地球—古生物学与地层学]