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地球学报  2005 

吉林省南部震旦系万隆组层序地层格架

DOI: 10.3975/cagsb.2005.04.03

Keywords: 海平面变化吉林万隆组层序地层格架震旦系

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Abstract:

吉林省南部震旦系地层发育,从下至上可分为桥头组、万隆组、八道江组、青沟子组,其中万隆组沉积以各类碳酸盐岩为主,厚度巨大,且是与辽宁南部和徐淮地区震旦系地层对比的关键层位,因此建立吉南万隆组海平面变化曲线和对比格架是十分必要的。依据沉积发育过程和米级旋回的叠置规律、费希尔图解、最大海泛事件等层序划分对比方法,吉南万隆组可划分出9个三级层序,根据Sr、C同位素测年资料,万隆组底部绝对年龄为850Ma、八道江组底部绝对年龄为812Ma,每个三级层序的年限约为4.2Ma。

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