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    浙江煤山P/T之交碳同位素对有机碳埋藏的指示意义

    黄俊华 罗根明 白晓 汤新燕

    黄俊华, 罗根明, 白晓, 汤新燕, 2007. 浙江煤山P/T之交碳同位素对有机碳埋藏的指示意义. 地球科学, 32(6): 767-773.
    引用本文: 黄俊华, 罗根明, 白晓, 汤新燕, 2007. 浙江煤山P/T之交碳同位素对有机碳埋藏的指示意义. 地球科学, 32(6): 767-773.
    HUANG Jun-hua, LUO Gen-ming, BAI Xiao, TANG Xin-yan, 2007. The Organic Fraction of the Total Carbon Burial Flux Deduced from Carbon Isotopes across the Permo-Triassic Boundary at Meishan, Zhejiang Province. Earth Science, 32(6): 767-773.
    Citation: HUANG Jun-hua, LUO Gen-ming, BAI Xiao, TANG Xin-yan, 2007. The Organic Fraction of the Total Carbon Burial Flux Deduced from Carbon Isotopes across the Permo-Triassic Boundary at Meishan, Zhejiang Province. Earth Science, 32(6): 767-773.

    浙江煤山P/T之交碳同位素对有机碳埋藏的指示意义

    基金项目: 

    中国石油化工股份有限公司海相油气勘探前瞻性项目 G0800-06-ZS-319

    详细信息
      作者简介:

      黄俊华(1964-), 男, 高工, 主要从事同位素地球化学、第四纪与环境研究.E-mail: jhhuang@cug.edu.cn

    • 中图分类号: P736

    The Organic Fraction of the Total Carbon Burial Flux Deduced from Carbon Isotopes across the Permo-Triassic Boundary at Meishan, Zhejiang Province

    • 摘要: 根据碳酸盐碳同位素和有机(干酪根) 碳同位素记录, 结合碳循环模式, 计算得到了浙江煤山全球二叠系-三叠系界线层型剖面第23-40层的有机碳埋藏分数forg.在第23-24层和第27-29层下部出现forg的两个高峰值, 与绿硫细菌反映的两个缺氧环境条件相对应.在第25-26层和第32-34层出现两个forg低谷值, 与2-甲基藿烷指示的两次蓝细菌繁盛(第26层和第29层上部到第34层) 基本吻合.这些结果反映了forg与埋藏时的氧化还原条件密切相关.forg与总有机碳含量TOC的关系比较复杂, 一些TOC较高的层位(如第26层) forg却较低, 而一些TOC较低的层位(如第27层) forg却较高, 反映了原始生产力对TOC的重要贡献.根据原始生产力和forg得到的原始有机埋藏量, 可以校正现今测得的残余TOC.本次研究结果说明, 同步有机-无机碳同位素分析, 在建立一定碳循环模型的基础上, 计算有机碳埋藏分数, 可有效指示有机质埋藏状态, 进而为建立生物-环境-有机碳埋藏的耦合关系模型提供基础.

       

    • 图  1  煤山B剖面δ13Corgδ13Ccarbforg及TOC随时间变化曲线(年代据Bowring et al., 1998)

      CB.蓝细菌繁盛; GSB.绿硫细菌繁盛

      Fig.  1.  The variation trends of δ13Corg, δ13Ccarb and TOC at Meishan Section B

      图  2  煤山B剖面δ13Corg随剖面深度变化曲线

      Fig.  2.  The δ13Corg variation with depth at Meishan Section B

      图  3  Kump and Arthur (1999)提出的碳同位素循环模式

      Fig.  3.  The carbon cycle model proposed by Kump and Arthur (1999)

      表  1  煤山B剖面样品δ13Corgδ13Ccarb分析结果

      Table  1.   The δ13Corg and the δ13Ccarb data of the samples analyzed at Meishan section B

      表  2  一些层位的有机碳埋藏分数forg、原始生产力P和总有机碳含量TOC

      Table  2.   The fraction of the organic carbon burial (forg), the primary production (P) and the TOC content in some beds in Meishan section B

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    • 收稿日期:  2007-08-25
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