摘要
"错时相"作为一种地质历史时期的特殊沉积类型,在扬子地区下三叠统广泛发育,是良好的海相碳酸盐岩油气储层之一。通过岩心和野外剖面资料,结合前人已有的研究,分析并总结了下扬子-南黄海地区"错时相"的特征及其分布规律,并探讨了其成因。研究结果表明,"错时相"出现在二叠纪末生物大灭绝后,类型包括薄层灰岩和条带灰岩、微生物岩、蠕虫状灰岩、扁平砾石砾岩等,其发育与特定的古构造、古海洋环境、古生物环境以及海平面的变化密切相关,并伴随着中生代古海洋生态的恢复而消失。研究"错时相"对于进一步认识下扬子-南黄海地区早三叠世古海洋环境和油气储层具有重要意义。
As a special type of sediments in geological history, anachronistic facies developed widely of the Lower Triassic in the Yangtze region as a high quality carbonate reservoir. Based on the data from drilling cores and field sections, combined with previous studies, this paper analyzes and summarizes the characteristics and distribution pattern of the anachronistic facies in the lower Yangtze-South Yellow Sea region, and discussion its genesis. The results show that the anachronistic facies including thin-bedded limestone and zebra limestone,microbialite, wormlike limestone and flat pebble conglomerates, appeared right after the biological mass extinction by the end of Permian and disappeared immediately with the restoration of Mesozoic palaeoceanic ecosystem.The development of anachronistic facies is closely related to the paleostructure, palaeo-marine environment,palaeontological environment and sea level change, so the study of anachronistic facies is of great significance for further understanding of the palaeo-environment and oil and gas reservoirs of Early Triassic in the lower YangtzeSouth Yellow Sea region.
作者
张玉玺
陈建文
张银国
ZHANG Yuxi;CHEN Jianwen;ZHANG Yinguo(Qingdao Institute of Marine Geology,CGS,Qingdao 266071,China;Laboratory for Marine Mineral Resources,Pilot National Laboratory for Marine Science and Technology,Qingdao 266237,China;Shandong University of Science and Technology,Qingdao 266590,China;Hohai University,Nanjing 210098,China;China University of Petroleum(East China),Qingdao 266580,China)
出处
《海洋地质前沿》
CSCD
北大核心
2021年第4期68-76,共9页
Marine Geology Frontiers
基金
国家地质调查专项“崂山隆起构造沉积条件地质调查”(DD20190818)。
关键词
下扬子
早三叠世
错时相
碳酸盐岩
古海洋环境
Lower Yangtze region
Early Triassic
anachronistic facies
carbonate rocks
palaeo-marine environment
