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南海北部浅表层沉积底栖有孔虫碳同位素及其对富甲烷环境的指示

陈芳 苏新 陆红锋 陈超云 周洋 程思海 刘广虎

陈芳, 苏新, 陆红锋, 陈超云, 周洋, 程思海, 刘广虎. 南海北部浅表层沉积底栖有孔虫碳同位素及其对富甲烷环境的指示[J]. 海洋地质与第四纪地质, 2007, 27(4): 1-7.
引用本文: 陈芳, 苏新, 陆红锋, 陈超云, 周洋, 程思海, 刘广虎. 南海北部浅表层沉积底栖有孔虫碳同位素及其对富甲烷环境的指示[J]. 海洋地质与第四纪地质, 2007, 27(4): 1-7.
CHEN Fang, SU Xin, LU Hong-feng, CHEN Chao-yun, ZHOU Yang, CHENG Si-hai, LIU Guang-hu. CARBON STABLE ISOTOPIC COMPOSITION OF BENTHIC FORAMINIFERS FROM THE NORTH OF THE SOUTH CHINA SEA: INDICATOR OF METHANE-RICH ENVIRONMENT[J]. Marine Geology & Quaternary Geology, 2007, 27(4): 1-7.
Citation: CHEN Fang, SU Xin, LU Hong-feng, CHEN Chao-yun, ZHOU Yang, CHENG Si-hai, LIU Guang-hu. CARBON STABLE ISOTOPIC COMPOSITION OF BENTHIC FORAMINIFERS FROM THE NORTH OF THE SOUTH CHINA SEA: INDICATOR OF METHANE-RICH ENVIRONMENT[J]. Marine Geology & Quaternary Geology, 2007, 27(4): 1-7.

南海北部浅表层沉积底栖有孔虫碳同位素及其对富甲烷环境的指示

详细信息
    作者简介:

    陈芳(1966-),女,教授级高级工程师,主要从事微体古生物学研究

  • 基金项目:

    中国地质调查局"天然气水合物资源评价及勘探开发战略研究"项目(GZH200200203-02-01)

  • 中图分类号: P736.4

CARBON STABLE ISOTOPIC COMPOSITION OF BENTHIC FORAMINIFERS FROM THE NORTH OF THE SOUTH CHINA SEA: INDICATOR OF METHANE-RICH ENVIRONMENT

More Information
  • 摘要: 对南海北部陆坡东沙海域、神狐海域及西沙海槽甲烷渗漏环境和无甲烷渗漏环境87个浅表层沉积物中的底栖有孔虫Uvigerina spp.进行碳同位素分析研究,结果表明,东沙海域δ13C值为-0.52‰~-5.68‰,平均值为-1.41‰,出现明显的负偏移;神狐海域δ13C值介于-0.36‰~-1.10‰,平均值为-0.75‰,未见明显的δ13C值负偏移;西沙海槽δ13C值介于-0.01%~-0.89‰,平均值为-0.45‰;对Uvigerina spp.碳同位素组成与沉积物有机碳(TOC)、甲烷(CH4)间的关系进行探讨,发现δ13C负偏移主要出现在甲烷渗漏环境,发生在末次盛冰期,与溶解无机碳负偏移以及沉积物全样的δ13C值负偏移层位相吻合,有可能作为富甲烷环境的替代指标。
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    [12] Rathburn A E, Pérez M E, Martin J B,et al.Relationships between the distribution and stable isotopic composition of living benthic foraminifera and cold methane seep biogeochemistry in Monterey Bay, California[J]. Geochemistry, Geophysics, Geosystems,2003, 4(12):1106.
    [13] Sen Gupta B K, Platon E, Bernhard J M,et al.Foraminiferal colonization of hydrocarbon-seep bacterial mats and underlying sediment, Gulf of Mexico slope[J]. Journal of Foraminiferal Research,1997,27:292-300.
    [14] 成鑫荣,汪品先,黄宝琦,等,南海表层沉积中有孔虫壳体的碳同位素研究及其意义[J].科学通报,2005, 50(1):48-52.

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    ;-jiang.Late Quaternary surface productivity and East Asian monsoon changes in the South China Sea[J].Quaternary Sciences,1999,1:32-40.]
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  • 收稿日期:  2007-04-05
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南海北部浅表层沉积底栖有孔虫碳同位素及其对富甲烷环境的指示

    作者简介:

    陈芳(1966-),女,教授级高级工程师,主要从事微体古生物学研究

基金项目:

中国地质调查局"天然气水合物资源评价及勘探开发战略研究"项目(GZH200200203-02-01)

  • 中图分类号: P736.4

摘要: 对南海北部陆坡东沙海域、神狐海域及西沙海槽甲烷渗漏环境和无甲烷渗漏环境87个浅表层沉积物中的底栖有孔虫Uvigerina spp.进行碳同位素分析研究,结果表明,东沙海域δ13C值为-0.52‰~-5.68‰,平均值为-1.41‰,出现明显的负偏移;神狐海域δ13C值介于-0.36‰~-1.10‰,平均值为-0.75‰,未见明显的δ13C值负偏移;西沙海槽δ13C值介于-0.01%~-0.89‰,平均值为-0.45‰;对Uvigerina spp.碳同位素组成与沉积物有机碳(TOC)、甲烷(CH4)间的关系进行探讨,发现δ13C负偏移主要出现在甲烷渗漏环境,发生在末次盛冰期,与溶解无机碳负偏移以及沉积物全样的δ13C值负偏移层位相吻合,有可能作为富甲烷环境的替代指标。

English Abstract

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