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东沙西南海域表层底栖有孔虫碳同位素对冷泉活动的指示

向荣 方力 陈忠 张兰兰 杜恕环 颜文 陈木宏

向荣, 方力, 陈忠, 张兰兰, 杜恕环, 颜文, 陈木宏. 东沙西南海域表层底栖有孔虫碳同位素对冷泉活动的指示[J]. 海洋地质与第四纪地质, 2012, 32(4): 17-24. doi: 10.3724/SP.J.1140.2012.04017
引用本文: 向荣, 方力, 陈忠, 张兰兰, 杜恕环, 颜文, 陈木宏. 东沙西南海域表层底栖有孔虫碳同位素对冷泉活动的指示[J]. 海洋地质与第四纪地质, 2012, 32(4): 17-24. doi: 10.3724/SP.J.1140.2012.04017
XIANG Rong, FANG Li, CHEN Zhong, ZHANG Lanlan, DU Shuhuan, YAN Wen, CHEN Muhong. CARBON ISOTOPE OF BENTHIC FORAMINIFERA AND ITS IMPLICATIONS FOR COLD SEEPAGE IN THE SOUTHWESTERN AREA OFF DONGSHA ISLANDS, SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2012, 32(4): 17-24. doi: 10.3724/SP.J.1140.2012.04017
Citation: XIANG Rong, FANG Li, CHEN Zhong, ZHANG Lanlan, DU Shuhuan, YAN Wen, CHEN Muhong. CARBON ISOTOPE OF BENTHIC FORAMINIFERA AND ITS IMPLICATIONS FOR COLD SEEPAGE IN THE SOUTHWESTERN AREA OFF DONGSHA ISLANDS, SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2012, 32(4): 17-24. doi: 10.3724/SP.J.1140.2012.04017

东沙西南海域表层底栖有孔虫碳同位素对冷泉活动的指示


doi: 10.3724/SP.J.1140.2012.04017
详细信息
    作者简介:

    向荣(1972-),男,研究员,主要从事微体古生物与海洋沉积古环境研究。E-mail:rxiang@scsio.ac.cn

  • 基金项目:

    中国科学院国际合作项目(KZCX2-YW-GJ03)

    中国科学院知识创新工程重要方向项目(KZCX2-YW-228)

    国家自然科学基金项目(40976031)和国土资源部科技项目(GZH201100311-2)

  • 中图分类号: P736.22

CARBON ISOTOPE OF BENTHIC FORAMINIFERA AND ITS IMPLICATIONS FOR COLD SEEPAGE IN THE SOUTHWESTERN AREA OFF DONGSHA ISLANDS, SOUTH CHINA SEA

More Information
  • 摘要: 底栖有孔虫碳同位素负偏记录是冷泉活动的重要指标之一。对南海北部东沙西南海域4个含碳酸盐结核的表层沉积物样品中的6种底栖有孔虫进行了氧碳同位素分析,结果表明,表生属种Discanomalina semiungulataCibicides wullerstorfiCibicides pseudoungerianusCibicides lobatulus的碳同位素,相对同水深南海现代表生底栖有孔虫有明显的负偏记录,尤其是表生种D.semiungulata基本都偏负;内生种Lenticulina orbicularis也有部分负偏,而Uvigerina auberiana的碳同位素则明显偏正;几种底栖有孔虫的碳同位素波动幅度都明显较大,明显超出了南海最近两个冰期-间冰期旋回中碳同位素的变化幅度。其中生活在蠕虫管壁上的活体底栖有孔虫D.semiungulataC.lobatulus的同位素都呈明显的负偏,认为该区底栖有孔虫碳同位素这种负偏和波动幅度大可能是由于冷泉活动造成的。活体底栖有孔虫碳同位素负偏表明该区可能存在有正在活动的冷泉,其中表生种D.semiungulata的大量出现可以作为南海冷泉活动的一个潜在指示标志。
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  • 收稿日期:  2012-07-06
  • 修回日期:  2012-07-17

东沙西南海域表层底栖有孔虫碳同位素对冷泉活动的指示

doi: 10.3724/SP.J.1140.2012.04017
    作者简介:

    向荣(1972-),男,研究员,主要从事微体古生物与海洋沉积古环境研究。E-mail:rxiang@scsio.ac.cn

基金项目:

中国科学院国际合作项目(KZCX2-YW-GJ03)

中国科学院知识创新工程重要方向项目(KZCX2-YW-228)

国家自然科学基金项目(40976031)和国土资源部科技项目(GZH201100311-2)

  • 中图分类号: P736.22

摘要: 底栖有孔虫碳同位素负偏记录是冷泉活动的重要指标之一。对南海北部东沙西南海域4个含碳酸盐结核的表层沉积物样品中的6种底栖有孔虫进行了氧碳同位素分析,结果表明,表生属种Discanomalina semiungulataCibicides wullerstorfiCibicides pseudoungerianusCibicides lobatulus的碳同位素,相对同水深南海现代表生底栖有孔虫有明显的负偏记录,尤其是表生种D.semiungulata基本都偏负;内生种Lenticulina orbicularis也有部分负偏,而Uvigerina auberiana的碳同位素则明显偏正;几种底栖有孔虫的碳同位素波动幅度都明显较大,明显超出了南海最近两个冰期-间冰期旋回中碳同位素的变化幅度。其中生活在蠕虫管壁上的活体底栖有孔虫D.semiungulataC.lobatulus的同位素都呈明显的负偏,认为该区底栖有孔虫碳同位素这种负偏和波动幅度大可能是由于冷泉活动造成的。活体底栖有孔虫碳同位素负偏表明该区可能存在有正在活动的冷泉,其中表生种D.semiungulata的大量出现可以作为南海冷泉活动的一个潜在指示标志。

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