湖北省二叠纪—三叠纪之交牙形石生物地层序列研究进展  

Advances in Permian-Triassic Conodont Bio-stratigraphicSequence of Hubei Province

作　　者：吴奎 邹亚锐 杨良哲 杨波涌 苑金玲 余浩宇 赵璧 Wu Kui;Zou Yarui;Yang Liangzhe;Yang Boyong;Yuan Jinling;Yu Haoyu;Zhao Bi(Hubei Institute of Geosciences,Wuhan,Hubei 430034;State Key Laboratory of Biogeology and Environmental Geology,Wuhan,Hubei 430074;Hubei Key Laboratory of Resource and Ecological Environment Geology,Wuhan,Hubei 430034)

机构地区：[1]湖北省地质科学研究院,湖北武汉430034 [2]生物地质与环境地质国家重点实验室,湖北武汉430074 [3]资源与生态环境地质湖北省重点实验室,湖北武汉430034

出　　处：《资源环境与工程》2023年第5期489-495,共7页Resources Environment & Engineering

基　　金：国家自然科学基金项目——湖北南漳—远安地区下三叠统牙形石研究(42102011);湖北省地质局科技项目——南二叠纪—三叠纪之交微生物岩牙形石生物地层及古氧相研究(KJ2022-5)、湖北省中生代典型生物群研究(KJ2023-2);湖北省自然科学基金项目——鄂西地区中—晚二叠世之交牙形石生物地层及古海水氧化还原状态演化研究(2021CFB276)。

摘　　要：二叠纪—三叠纪之交发生了自显生宙以来最大的生物大灭绝事件,彻底改变了当时的海洋生态系统。牙形石作为二叠纪—三叠纪之交最重要的标准化石,为该时期地层对比提供了重要的基础。在当时属于上中扬子地区的湖北省,由于位于三叠系底界的全球界线层型剖面——浙江长兴煤山D剖面和曾经的层型候选剖面——四川广元上寺剖面之间,同样记录了该时期大量的地层,基于此,对湖北省该时期牙形石带相关研究进行了系统总结和对比。结果表明,湖北省二叠纪—三叠纪之交牙形石序列发育完整,可以识别出与煤山、上寺剖面精确对比的牙形石带,为充分理解二叠纪—三叠纪之交生物与环境协同演化过程提供了有利线索。但不同程度的海退事件对湖北省该时期牙形石带的记录产生了一定的影响。正是因为如此,在牙形石序列研究的基础上,加强对牙形石个体形态、成分组成等其他方向的研究,将会帮助理解区域事件及全球性事件对生物的影响,从而对该时期生物与环境协同演化过程有更深刻的展示。同时,由于鄂西地区大隆组是下一页岩气开采重点层位,对其进行详细的牙形石生物地层研究,也能为未来探索页岩气富集机理提供一定的理论基础。The largest mass extinction event since the Phanerozoic occurred at the turn of Permian-Triassic,which completely changed the marine ecosystem at that time.As the most important standard fossil at the turn of Permian-Triassic,conodont provides an important basis for stratigraphic correlation in this period.Belonging to the middle-upper Yangtze area,Hubei province is now located between the Global Stratotype Section and Point of the Permian-Triassic boundary namely the Meishan section D,and the former candidate section namely the Shangsi section.Hence,abundant similar Permian-Triassic strata were also recorded in Hubei Province.Based on this,a systematic summary and comparison of the research on the conodont belt in Hubei Province during this period are carried out.The result shows that the conodont sequence at the turn of the Permian-Triassic in Hubei Province is well developed,and the conodont belt accurately compared with the Meishan and Shangsi sections can be identified,which provides a favorable clue for fully understanding the co-evolution process of biology and environment at the turn of the Permian-Triassic.However,different regression events might have influenced the conodont zonations of different sections from Hubei Province.Because of this,on the basis of the study of conodont sequence,strengthening the study of other directions of conodont,including its individual morphology and composition,will help people understand the impact of regional events and global events on organisms,so as to have a more profound display of the co-evolution process of organisms and environment in this period.At the same time,because the Dalong Formation in western Hubei is the next key stratum for shale gas exploitation,a detailed study of conodont biostratigraphy can also provide a theoretical basis for exploring the mechanism of shale gas enrichment in the future.

关 键 词：二叠纪—三叠纪之交 牙形石 生物地层序列 湖北 

分 类 号：Q911.26[天文地球—古生物学与地层学] Q911.6[生物学—古生物学]