吉林省南部震旦系万隆组层序地层格架  

The Sequence Stratigraphic Framework of the Sinian Wanlong Formation in Southern Jilin Province

作　　者：刘燕学[1] 旷红伟[2] 刘常红[3] 蔡国印[4] 孟祥化[5] 葛铭[5] 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]长江大学,湖北荆州434023 [3]中石化石油勘探开发研究院,北京100083 [4]中国科学院遥感应用研究所,北京100101 [5]中国地质大学,北京100083

出　　处：《地球学报》2005年第4期309-314,共6页Acta Geoscientica Sinica

基　　金：国际地质对比计划委员项目IGCP447(批准号:SC/GEO/546/447);国家自然科学基金项目(批准号:40172043);科技部国家重点基础研究项目(001CB711002)资助。

摘　　要：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。The Sinian strata well developed in southern Jilin Province can be divided into Qiaotou Formation. Wanlong Formation, Badaojiang Formation and Qinggouzi Formation in an ascending order. The Wanlong Formation, dominated by all kinds of carbonate rocks in great thickness, is a key sequence that can be correlated with the Sinian strata in southern Liaoning and Xuhui areas. It is therefore necessary to establish the sea level change curve and the sequence stratigraphic framework of the Wanlong Formation. Based on the development of sedimentation, the overlying regulation of meter-scaled cycles, Fisher graphs and the maximum sea rico：ling events, the Wanlong Formation in southern Jilin Province can be divided into nine 3^rd-order sequences. According to Sr and C dating data, the ages of the lower Wanlong Formation and Badaojiang Formation are 850 Ma and 812 Ma, respectively, and the age of every 3^rd-order sequence is about 4.2 Ma.

关 键 词：海平面变化 吉林 万隆组 层序地层格架 震旦系 吉林省 南部 三级层序 绝对年龄 同位素测年 

分 类 号：P539.2[天文地球—古生物学与地层学] P534.31[天文地球—地质学]