利用古成熟度方程初步恢复济阳坳陷晚三叠世印支运动剥蚀量  

Restoration of the Thickness Eroded during the Late Triassic Indo-Chinese Tectonic Movement in the Jiyang Depression by Using the Paleo-Maturity-Equation

作　　者：陈中红[1] 查明[1] 宋国奇[2] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061 [2]中石化胜利油田股份有限公司,山东东营257062

出　　处：《地质学报》2008年第8期1036-1045,共10页Acta Geologica Sinica

基　　金：国家“十五”重点科技攻关项目(编号2001BA605A-09-21);中石化胜利油田有限公司“十一五”重点项目资助成果

摘　　要：与新生界镜质组反射率(Ro)值比较,济阳坳陷晚古生界Ro值整体上出现了显著的异常,通过对济阳坳陷大量的晚古生界Ro异常数据点与新生界Ro数据点的分析、比较,建立了济阳坳陷新生界成熟度方程(Ro-H方程)和晚古生界古成熟度方程,利用这些古成熟度方程,对济阳坳陷Mz/Pz间断面剥蚀量进行了初步恢复,研究结果表明东营凹陷、沾化凹陷、车镇凹陷Pz/Mz间断面剥蚀量分别达3.1～4.1km、2.0～4.1km、3.1～4.1km左右,平均在3.5km左右,佐证了华北地台在印支运动开始前是个统一的大型沉积盆地,济阳坳陷部分晚古生界煤系地层在晚三叠世初期之前已经开始热解生烃。Comparative to the vitrinite reflectance （Ro） of the Cenozoic, the value of Ro from the Upper Paleozoic displays distinct anomaly. Based on the analysis and comparison of a number of Ro data, this study established maturity equations （Ro-H） of the Jiyang depression of both the Cenozoic and the Upper Paleozoic, through which the eroded thickness of the discontinuity surface between the Mesozoic and the Paleozoic in the Jiyang depression was restored. The result revealed that the eroded thiekness of the discontinuity surface in the Dongying Sag, Zhanhua Sag and Chezhen Sag are 3.1-4.1 km, 2.0-4.1 km and 3.1-4.1 km, respectively, averaging 3.5 km. This fully suggests that the North China Plate was a unified large-scale sedimentary basin before the Indo-Chinese movement, and part of late-Paleozoic coalbearing strata started to produce hydrocarbon by means of thermolysis.

关 键 词：镜质组反射率 成熟度方程 晚古生代 剥蚀量 济阳坳陷 

分 类 号：P618.13[天文地球—矿床学]