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地球科学进展  2013, Vol. 28 Issue (3): 357-365    DOI: 10.11867/j.issn.1001-8166.2013.03.0357
综述与评述     
早三叠世海相碳酸盐碳同位素研究进展
黄可可,黄思静,兰叶芳,胡作维
成都理工大学油气藏地质及开发工程国家重点实验室,沉积地质研究院,四川 成都 610059
Review of the Carbon Isotope of Early Triassic Carbonates
Huang Keke, Huang Sijing, Lan Yefang, Hu Zuowei
State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation, Institute of Sedimentary Geology, Chengdu University of Technology,  Chengdu 610059, China)
 全文: PDF(1293 KB)  
摘要:

早三叠世是地球发展史上的特殊时期,代表了古、中生代过渡时期的生态重建与复苏。随着各种“异常环境事件”信息在近年陆续被揭示,早三叠世地质学研究成为地学界新的热点领域。海相碳酸盐碳同位素组成记录了碳循环的变化,是理解重大突变期的生态环境事件和地球过程的重要切入点。最近10年的研究表明,过去集中在二叠纪/三叠纪界线附近发现的“负漂移”现象只能代表海洋化学持续了约5 Ma的动荡局面的开始,直到中三叠世才趋于平稳,高频率、大幅度的整体演变型式已很难用过去提出的机制进行解释。全球范围内缺乏可精确对比性以及高达+8‰的正向极值的成因等,都是值得深入思考的问题。

关键词: 早三叠世碳同位素波动特征    
Abstract:

The Early Triassic is a critical period in earth history, representing the ecosystem reconstruction and recovery after the endPermian biotic crisis. As a result of recent discoveries about a series of unusual environmental and evolutionary events, the research of the Early Triassic has become a focus topic in the geological fields. Variations in the carbon isotopic compositions of marine carbonate record the fluctuation of carbon cycle, and give information about ecosystem function and environmental change through the transitional period. The new carbon isotope data indicate that the P/T δ13C decline was just a start of a series of large fluctuations that continued throughout the Early Triassic before the early Middle Triassic. The high frequency and large amplitude of the δ13C excursions demonstrate that the catastrophic mechanisms proposed in the past become less attractive to explain the Early Triassic carbon isotopic record as a whole. The lack of comparability of δ13C curve globally and the genesis for the usually 8‰ positive shift are the problems worthy   further consideration.

Key words: Early Triassic    Carbon isotope    Perturbation
收稿日期: 2012-07-31 出版日期: 2013-03-10
:  P736.4  
基金资助:

国家自然科学基金重点项目“四川盆地东北部三叠系飞仙关组优质白云岩储层形成的成岩机制”(编号:40839908);国家自然科学基金面上项目“川渝地区早三叠世海相碳酸盐岩的碳同位素研究”(编号:41272130)资助.

作者简介: 黄可可(1983-),女,重庆人,博士研究生,主要从事沉积地球化学研究.E-mail:h-k-k@yeah.net
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引用本文:

黄可可,黄思静,兰叶芳,胡作维. 早三叠世海相碳酸盐碳同位素研究进展[J]. 地球科学进展, 2013, 28(3): 357-365.

Huang Keke, Huang Sijing, Lan Yefang, Hu Zuowei. Review of the Carbon Isotope of Early Triassic Carbonates. Advances in Earth Science, 2013, 28(3): 357-365.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2013.03.0357        http://www.adearth.ac.cn/CN/Y2013/V28/I3/357

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