范庆超^1,2,3, 徐兆凯^1,2,4,5,6
1.中国科学院海洋研究所, 山东 青岛 266071;2.中国科学院海洋地质与环境重点实验室, 山东 青岛 266071;3.中国科学院大学, 北京 100049;4.青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室, 山东 青岛 266061;5.中国科学院海洋大科学研究中心, 山东 青岛 266071;6.中国科学院第四纪科学与全球变化卓越创新中心, 陕西 西安 710061

摘要:
系统总结了白垩纪OAEs的研究进展，重点讨论了OAE1a、OAE1b和OAE2时期的有机碳（TOC）含量、碳同位素、古温度和锶同位素特征及其古环境指示意义，综合分析了白垩纪OAEs的成因机制。结果表明白垩纪OAEs的发生可能与该时期海底大规模的火山活动以及由其引起的气温升高、碳水化合物大量分解、水文循环加快和海洋生物生产力提高等一系列变化有关。对于白垩纪OAEs演化特征和成因机制的深入研究具有重要借鉴意义。通过对白垩纪OAEs的综合分析发现，当前的研究区域主要集中在大西洋/特提斯盆地及其周边陆地，而对南半球高纬度地区的研究报道迄今未见，从而无法对白垩纪OAEs进行全球性对比和系统性研究。今后我们将重点围绕南半球高纬度地区白垩纪OAEs的演化特征、成因机制及其古气候环境效应等进行深入研究。
关键词:白垩纪大洋缺氧事件碳循环古环境
DOI：10.11759/hykx20190303001
分类号:P736.21
基金项目:国家自然科学基金项目（41876034）

A review of Cretaceous ocean anoxia events
FAN Qing-chao^1,2,3, XU Zhao-kai^1,2,4,5,6
1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.CAS Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3.University of Chinese Academy of Sciences, Beijing 100049, China;4.Laboratory for Marine Geology and Environment, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266061, China;5.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;6.CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China
Abstract:
This paper reviews the research progress on Cretaceous oceanic anoxic events (OAEs), focusing on total organic carbon (TOC) content, carbon isotopes, paleotemperature, Sr isotope characteristics, and their potential significance in the paleoenvironment during the periods of OAE1a, OAE1b, and OAE2. The mechanisms of the genesis of Cretaceous OAEs were comprehensively analyzed. The results show that the occurrence of Cretaceous OAEs may be related to large-scale submarine volcanism during these periods and its impacts, which include an increase in atmospheric temperature, massive decomposition of carbohydrates, acceleration of hydrological cycles, and an increase in marine biological productivity. It is of great significance to further study the evolutionary characteristics and genetic mechanisms of Cretaceous OAEs. Moreover, it is found that current research on Cretaceous OAEs mainly focuses on the Atlantic/Tethys Basin and its surrounding lands; a systematic study of Cretaceous OAEs in the high latitudes of the Southern Hemisphere has not yet been conducted. In the future, we will focus on the evolutionary characteristics, genetic mechanisms, and paleoclimatic and environmental effects of the Cretaceous OAEs in the high latitudes of the Southern Hemisphere.
Key words:Cretaceousoceanic anoxic eventscarbon cyclepaleoenvironment





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