苏北盆地高邮凹陷第四纪年代地层格架的建立及海侵期次探讨——据兴化钻孔ZKJ43  

QUATERNARY STRATIGRAPHY SEA LEVEL CHANGE IN THE GAOYOU SAG OF THE SUBEI BASIN BASED ON DATA FROM THE DRILL CORE ZKJ43

作　　者：苗巧银[1] 朱志国 陈火根[1] 程渝 MIAO Qiao-yin;ZHU Zhi-guo;CHEN Huo-gen;CHENG Yu(Geological Survey Research Institute-Key Laboratory of geological hazard ofgroundfissures,Nanjing 210048;Jiangsu moisten ring Environmental Technology Co.,Ltd.Nanjing,Jiangsu,Nanjing 213109)

机构地区：[1]江苏省地质调查研究院地裂缝地质灾害重点实验室,江苏南京210048 [2]江苏润环环境科技有限公司,江苏南京213109

出　　处：《地层学杂志》2018年第3期336-343,共8页Journal of Stratigraphy

基　　金：中国地质调查局"长江三角洲地区三维地质调查"(项目编号:1212011220252)资助

摘　　要：中国东部第四纪海侵期次已成为近年研究的热点之一,而苏北盆地(除滨海平原)关于海侵的研究几乎是空白。根据ZKJ43号孔测年、古地磁、岩性特征等资料,建立苏北盆地高邮凹陷第四纪年代地层框架,依照微体古植物和化学元素含量及其比值变化,首次划分出5次海侵:早更新世早期(170 m左右)、中更新世早期(90~110 m)、晚更新世早期(46.8~58 m)、晚更新世晚期(14.5~22.7 m)、全新世中期(0.8~6.6 m)。该年代地层框架的建立和海侵期次的划分,对整个苏北盆地地层对比、海侵期次与海侵范围的判定具有重要意义。通过化学元素含量与浅海、黄河、长江的对比,可知高邮盆地主要为长江与黄海相互作用形成,黄河作用较小。Quaternary sea level change in eastern China is a hot topic of recent research. However, Quaternary stratigraphy of the Subei Basin, with the exception of coastal plain, is poorly understood. On the basis of geo- chronological, paleomagnetic, and lithostratigraphic data from the drill core ZKJ43, we studied the Quaternary stratigraphy of the Gaoyou Say in the Subei Basin. According to palynological and elemental geochemical data, we identified five transgressions in the early Early Pleistocene （about 170 meters）, early Middle Pleistocene （90-110 m）, early Late Pleistocene （46.8-58.0 m）, late Late Pleistocene （14.5-22.7 m）, and middle Holocene （0.8-6.6 m）. The establishment of a stratigraphic framework and the recognition of transgression events have important significance in the stratigraphic correlation and sea level change of the Subei Basin. An elemental geochemical comparison with correlative strata in Yellow Sea, Yellow River, and Yangtze River suggests that the Yellow Sea and Yangtze River had a greater impact on sedimentation in the Gaoyou Sag, with relatively little influence of the Yellow River.

关 键 词：磁性地层 古地磁 ESR测年 微体古生物 化学元素 海侵 第四纪 苏北 

分 类 号：P539.3[天文地球—古生物学与地层学] P534.63[天文地球—地质学]