古地理学报 ›› 2023, Vol. 25 ›› Issue (6): 1421-1436. doi: 10.7605/gdlxb.2023.04.049

• 中国石油大学70周年校庆专辑(Ⅱ) • 上一篇    下一篇

黔西水城长兴期晚期生物与环境突变响应: 基于古生物学和地球化学证据*

党志英1,2, 沈玉林1,2, 杨天洋1,2, 金军1,2,3, 赵勇4   

  1. 1 中国矿业大学资源与地球科学学院,江苏徐州 221008;
    2 煤层气资源与成藏过程教育部重点实验室,江苏徐州 221008;
    3 贵州省煤层气页岩气工程技术研究中心,贵州贵阳 550081;
    4 中国石化新疆新春石油开发有限责任公司,山东东营 257000
  • 收稿日期:2023-01-15 修回日期:2023-03-13 出版日期:2023-12-01 发布日期:2023-09-28
  • 通讯作者: 沈玉林,男,1981年生,教授,主要从事沉积学和煤、油气地质学的教学和科研工作。E-mail: yulinsh@163.com。
  • 作者简介:党志英,女,1994年生,博士研究生,研究方向为沉积学、古生物地层学。E-mail: zydanghpu@126.com。
  • 基金资助:
    *国家自然科学基金项目(编号: 42172186,41872168),国家重点研发计划项目(编号: 2021YFC2902002)联合资助

Response of biological and environmental catastrophe in the late Changhsingian in Shuicheng area,western Guizhou,China: evidence based on paleontology and geochemistry

DANG Zhiying1,2, SHEN Yulin1,2, YANG Tianyang1,2, JIN Jun1,2,3, ZHAO Yong4   

  1. 1 School of Resources and Geosciences,China University of Mining and Technology,Jiangsu Xuzhou 221008,China;
    2 Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process,Ministry of Education,Jiangsu Xuzhou 221008, China;
    3 Guizhou Engineering Technology Research Center for Coalbed Methane and Shale Gas,Guiyang 550081,China;
    4 Sinopec Xinjiang Xinchun Petroleum Development Co.,Ltd,Shandong Dongying 257000,China
  • Received:2023-01-15 Revised:2023-03-13 Online:2023-12-01 Published:2023-09-28
  • Contact: SHEN Yulin,born in 1981,professor, is mainly engaged in teaching and scientific research on sedimentology and coal, oil and gas geology. E-mail: yulinsh@163.com.
  • About author:DANG Zhiying,born in 1994,Ph.D.candidate, is currently engaged in sedimentology and paleobiostratigraphy. E-mail: zydanghpu@126.com.
  • Supported by:
    National Natural Science Foundation of China(Nos. 42172186,41872168)and the National Key Research and Development of China(No.2021YFC2902002)

摘要: 微体化石和地球化学数据的综合应用在重建古环境的研究中发挥着重要的作用。黔西水城地区上二叠统长兴组可见钙质藻类、有孔虫、腕足类、腹足类、双壳类、海百合、介形虫和海胆等化石,以钙质藻类和浮游有孔虫最为丰富多样。基于古生物分布特征,结合全岩微量元素(Rb、Cu、Sr/Ba、V/(V+Ni)、Ni/Co、V/Cr、Zr/Rb、(Zr+Rb)/Sr和Rb/Sr)和生物壳体的微量元素(Mg/Ca、Sr/Ca、B/Ca、Fe/Mn和87Sr/86Sr)分析结果,发现研究区长兴期晚期生物对环境演化较为敏感,Hindeodus changxingensis-Clarkina zhejiangensis带(长兴期晚期,约251.9 Ma)的古气候和生物演化快速变化,短时间内发生了生物数量锐减至消失、水体盐度剧增、气温突然升高以及从海退转为快速海侵的一系列变化。推测在二叠纪末生物大灭绝事件中,短期的、快速的和极端的多重相互作用(盐度、温度和快速的海侵事件等)产生的环境突变可能是当时海洋生物遭受沉重打击的主要诱因。

关键词: 古生物, 古盐度, 古气候, 二叠纪末, 长兴组

Abstract: The comprehensive application of microfossils and geochemistry plays an important role in the reconstruction of paleoenvironments. Abundant biological fossils,such as calcareous algae,foraminifers,brachiopods,gastropods,bivalves,crinoids,ostracods,and echinoids,were developed in the marine carbonates of the Late Permian Changhsingian in the Shuicheng area of western Guizhou,and calcareous algae and foraminifers are the most abundant species. In this paper,the distribution characteristics of fossils,whole-rock trace elements(Rb,Cu,Sr/Ba,V/(V+Ni),Ni/Co,V/Cr,Zr/Rb,(Zr+Rb)/Sr,and Rb/Sr)and trace element analysis of biogenic shells(Mg/Ca,Sr/Ca,B/Ca,Fe/Mn and 87Sr/86Sr)were studied. It was found that biological evolution was sensitive to paleoclimate variation. During the Hindeodus changxingensis-Clarkina zhejiangensis(ca. 251.9 Ma),there was a rapid variation in paleoclimate and marine organisms,and biotic groups declined sharply to disappear in a short time. Meanwhile,a series of variations occurred,including a dramatic increase in water salinity,sudden warming,and a shift from regression to a rapid transgression process. It was speculated that the interactions among salinity,temperature and rapid transgression-regression events led to climate change,which was the main reason for the extinction of marine life in the Late Permian.

Key words: palaeontology, palaeosalinity, palaeoclimate, end-Permian, Changxing Formation

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