摘要
寒武纪生物与古海洋环境演化的成因联系是追溯生命起源、发展及地球环境变迁和两者协同演化的前沿科学问题之一。寒武纪第4期是其中重要的时间节点,华南板块是寒武纪相关问题研究的重要窗口,而古海洋氧化还原条件是分析论证古生物种属及数量巨变地质成因的关键切入点。据此,在大量文献调研基础上,对华南板块寒武纪第4期的沉积古地理背景、古海洋环境条件、生物发育情况、突发性地质事件等进行系统的梳理与总结,认为陆源水体注入、风暴作用等区域性地质作用以及突发性火山活动、海侵等全球性地质事件对古海洋氧化还原条件影响显著,而生物消亡与地质突变事件所引发的海洋缺氧密切相关;但氧化还原条件不同波动阶段的生物丰度差异和不同古生物丰度点位的氧化还原条件差异尚不明确,古海洋氧化还原条件与可诱发其产生波动的地质事件精确时限对应关系仍存在争议,古海洋氧化还原条件波动以何种速度、幅度突破古生态系统耐受阈值仍然未知,难以探索三者之间更深层次的内在联系,可作为后续研究工作重点以进一步揭示寒武纪突发性地质事件、古海洋氧化还原条件和生物演化间的成因联系。
The genetic relationship between the Cambrian Explosion and the evolution of the paleo-marine environment is one of the frontier scientific issues in tracing the origin and development of life,environmental changes,and their co-evolution. The Cambrian Stage 4 is one of the key points during this period,and the South China Plate is a prominent window for the research on Cambrian Explosion related issues. Thus,the redox condition of the paleoocean is a crucial pointcut for analyzing the geological origin of great changes of paleontological species and numbers.Therefore,based on the sufficient survey of previous research,this paper systematically reviews and summarizes the sedimentary paleogeographic background,paleo-marine environment conditions,biological development situation,and cataclysmic geological events,and then explores the genetic relationships among geological events,paleo-marine redox conditions,and biological evolutions during the Cambrian Stage 4 to reveal the co-evolution between paleoocean redox conditions and biology in the Early Cambrian. The results infer that the frequent terrestrial water injection,storm surge,intensively volcanic activity,and transgressive events during the Cambrian Stage 4 affected the paleo-marine redox conditions significantly,and the biological crisis was closely related with the paleo-marine anoxic event caused by geological events. However,the differences in biological abundance among different fluctuation stages of redox conditions and the differences in redox conditions at different paleontological abundance points,as well as the exact temporal correspondences between paleo-marine anoxic and/or oxidation events and the proposed triggering geological events,are still controversial,leading to confusion about the internal relationships among them. Thus,this paper introduces the paleo-marine redox conditions of the Early Cambrian and their co-evolution with biology in order to provide reference for the research on the causal relationships between life and environmental cha
作者
任影
钟大康
邰俊伟
陈聪
刘伟
刘可
王柯
杨子杰
REN Ying;ZHONG DaKang;TAI JunWei;CHEN Cong;LIU Wei;LIU Ke;WANG Ke;YANG ZiJie(College of Geosciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China)
出处
《沉积学报》
CAS
CSCD
北大核心
2022年第3期701-714,共14页
Acta Sedimentologica Sinica
基金
东北石油大学青年科学基金(2018QNL-09)、东北石油大学人才引进科研启动经费资助项目(1305021844)
黑龙江省自然科学基金(LH2021D003)。
关键词
生物消亡
突发性地质事件
协同演化
寒武纪早期
氧化还原条件波动
biological extinction
cataclysmic geological events
co-evolution
Early Cambrian
fluctuation of redox conditions
