北黄海东部次盆地元古宇沉积序列及锆石年代学记录  

PROTEROZOIC SEDIMENTARY SEQUENCES AND ZIRCON U-Pb DATING IN THE EAST SUB-BASIN, NORTH YELLOW SEA

作　　者：王改云[1] 刘金萍[1] 简晓玲[1] WANG Gai Yun;LIU Jin Ping;JIAN XiaoLing(MNR Key Laboratory of Marine Mineral Resources,Guangzhou Marine Geological Survey,Guangzhou 510075)

机构地区：[1]自然资源部海底矿产资源重点实验室,广州海洋地质调查局,广东广州510075

出　　处：《地层学杂志》2021年第1期11-18,共8页Journal of Stratigraphy

基　　金：中国地质调查局(DD20191009、DD20211362)资助。

摘　　要：北黄海东部次盆地是揭示华北克拉通东缘裂谷元古宇地质特征的关键区域。本文通过对关键钻井的地层发育、岩性组合等研究,结合锆石U-Pb年龄测定,分析北黄海东部次盆地元古宇沉积相和古地理环境,解析其年代学及构造属性等信息,为建立华北克拉通东缘元古宇地层框架提供依据。研究表明,北黄海东部次盆地在太古宇结晶基底之上覆盖着厚层元古宇碎屑岩-碳酸盐岩沉积盖层,并伴随辉绿岩的侵入。垂向上,元古宇包括2个构造层序,均为冲积扇-海相沉积。通过钻井沉积层内侵入岩的锆石U-Pb测年数据,推测北黄海东部次盆地结晶基底之上的沉积层发育于古元古代末—新元古代中期,且有不同时期的岩浆侵入。The East Sub-basin of the North Yellow Sea is a key area to reveal the Proterozoic geological history of the eastern margin of the North China Craton. In this paper, stratigraphic sequence and sedimentary facies of the drilling well NYS5 in the East Sub-basin of the North Yellow Sea were analyzed, and LA-ICP-MS zircon U-Pb dating of the intrusive magmatic rocks were conducted. The facies analysis indicates that the Proterozoic strata in the basin can be divided into two tectonic sequences deposited in the alluvial fan-marine facies. The zircon U-Pb dating data from intruded diabase suggest that the thick sedimentary sequence above the crystalline basement in the sub-basin was developed during late Proterozoic to the middle Neoproterozoic with multiple magmatic intrusive events.

关 键 词：元古宇 沉积序列 锆石年代学 东部次盆地 北黄海 

分 类 号：P534.3[天文地球—古生物学与地层学]