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首页> 外文期刊>Journal of Asian earth sciences >A lacustrine record of the early Aptian climate change by oceanic anoxic event (OAE) la in the Jiaolai Basin, Eastern China
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A lacustrine record of the early Aptian climate change by oceanic anoxic event (OAE) la in the Jiaolai Basin, Eastern China

机译：中国东部嘉玉盆地海洋缺氧事件（OAE）La的早期Aptian气候变化的湖泊记录

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摘要

The early Aptian climate change resulted in changes in both the ocean and terrestrial ecosystems. This global climate change is well documented in marine sediments in the form of the oceanic anoxic event (OAE) 1a, but it has rarely been reported from the inland lakes in the East Asian continent. In this study, carbon and oxygen isotopes, quantitative palaeosalinity, clay mineral composition and contents, organic matter content, and detrital zircon ages from the Shuinan and Zhifengzhuang Formations in the Jiaolai Basin were determined to examine whether this global climate change was recorded in inland lakes. This study showed that in the early depositional stage of the Shuinan Formation, the paleo-lake in the Jiaolai Basin was a saline lake with long detention and strong sealing. The climate of the Jiaolai Basin became hotter and drier in the early Aptian (similar to 120 Ma) and the evaporation increased, which increased the palaeosalinity of the Shuinan Formation. High-salinity water, high temperatures, and strong evaporation led to a positive migration of the delta C-13 values. The extreme dry and hot climate documented in the black shale of the Shuinan Formation might serve as a response of inland lakes to OAE 1a. This study provided not only a lacustrine record of an Early Aptian global climate change event but also a new perspective to deepen the understanding of the effects of the Cretaceous climate change in terrestrial ecosystems.
机译：早期的APTIAN气候变化导致海洋和陆地生态系统的变化。这种全球气候变化在海洋缺氧事件（OAE）1A的形式中有充分的沉积物，但很少从内陆湖南大陆的内陆湖中报道。在本研究中，确定了焦利盆地中蜀和志前庄形成的碳和氧同位素，定量甘蔗，粘土矿物质，含量，有机物质含量和脱嘴锆末，审查该全球气候变化是否在内陆湖区记录。这项研究表明，在舒南地层的早期沉积阶段，焦井盆地的古湖是一种盐水湖，拘留长期密封。焦井盆地的气候变得更热，早期的安提尼（类似于120 mA），蒸发增加，增加了蜀南地层的古角质地区。高盐水，高温，强烈的蒸发导致δC-13值的正迁移。在舒南形成的黑色页岩中记录的极端干燥和热的气候可能是内陆湖到OAE 1A的反应。本研究不仅提供了早期安提尼亚全球气候变化事件的湖泊记录，也是深化对陆地生态系统中白垩纪气候变化的影响的新视角。

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  • 来源
    《Journal of Asian earth sciences》 |2020年第11期|104537.1-104537.21|共21页
  • 作者

    Zhang Xiangyu; Li Shoujun;

  • 作者单位

    Shandong Univ Sci & Technol Coll Earth Sci & Engn Qingdao 266590 Shandong Peoples R China|Minist Nat Resources Key Lab Stratig & Palaeontol Beijing 100037 Peoples R China;

    Shandong Univ Sci & Technol Coll Earth Sci & Engn Qingdao 266590 Shandong Peoples R China|Chinese Acad Sci State Key Lab Palaeobiol & Stratig Nanjing Inst Geol & Palaeontol Nanjing 210008 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Jiaolai basin; Early aptian; Climate change; Lacustrine record; Oceanic anoxic event (OAE) 1a;

    机译：嘉玉盆地;早期安提尼亚;气候变化;湖泊记录;海洋缺氧事件（OAE）1A;

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