济阳坳陷古近纪孢粉与层序地层THE PALEOGENE PALYNOLOGY AND SEQUENCE STRATIGRAPHY IN THE JIYANG DEPRESSION
贺振建,蒋光秀,贾凤华,边雪梅,魏文艳
摘要(Abstract)：
在陆相盆地中,基底沉降、沉积物供给和气候控制着基准面变化和层序发育,而气候的变化造成植被的变化,即造成了植被所产生的孢粉组合的变化,层序地层与孢粉组合有着密切的联系。首先根据孢粉母体植物生长的环境来恢复古气候,然后与综合岩性、电性及地震等资料在济阳坳陷古近系划分出的1个一级层序、4个二级层序、10个三级层序相对照。结果表明,利用孢粉组合特征进行层序地层学研究是可行的;牛38井沙三段中连续取芯井段,根据孢粉可以划分出湖侵体系域和湖退体系域2个三级层序,依据主要孢粉属种的变化,进一步划分出17个次级层序,与高精度层序地层对应。在资料丰富的情况下,可以运用孢粉组合变化进行高精度层序地层学分析,以提高区域地层对比的精度。
关键词(KeyWords)： 孢粉;层序地层;古近纪;济阳坳陷;山东
基金项目(Foundation): 中石化集团公司科技攻关项目“断陷湖盆碎屑岩储层成岩演化与评介”(P06010)资助
作者(Author): 贺振建,蒋光秀,贾凤华,边雪梅,魏文艳
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