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Mineralogies and Stable Isotopic Compositions of Methane-derived Carbonates from the Northeastern South China Sea
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  • 出版年:2010
  • 作者:LU Hongfeng;CHEN Fang;LIU Jian;ZHOU Yang;LIAO Zhiliang
  • 单位1:Guangzhou Marine Geological Survey
  • 出生年:1976
  • 学历:Ph.D.
  • 语种:英文
  • 作者关键词:carbonates;isotopic compositions;methane;South China Sea
  • 起始页:51
  • 总页数:9
  • 刊名:海洋地质与第四纪地质
  • 是否内版:否
  • 刊频:双月刊
  • 创刊时间:1981
  • 主管单位:国土资源部
  • 主办单位:青岛海洋地质研究所
  • 主编:张训华
  • 地址:青岛市福州南路62号;北京东黄城根北街16号
  • 邮编:266071;100717
  • 电子信箱:gwzhang@qd-public.sd.cninfo.net
  • 网址:http://HYDZ.Chinajournal.net.cn
  • 卷:30
  • 期:2
  • 期刊索取号:P226.06 449-29
  • 数据库收录:山东优秀期刊;中国地质学核心期刊;中国自然科学核心期刊;中国科技论文统计源期刊;中国海洋文献库核心海洋科技期刊
  • 核心期刊:中国地质学核心期刊;中国自然科学核心期刊;中国海洋文献库核心海洋科技期刊
摘要
Three authigenic carbonates are retrieved from the seafloor of northeastern South China Sea,showing the morphologies of doughnut,concretion and crust.X-ray results show that carbonates mainly consist of claymin-erals,terrigenous constituents(quartz,feldspar),high-Mg calcite,and ankerite.Except the doughnut,the concre-tion and the crust are characterized by very light δ13C values(—32.83‰PDB and—38.01‰PDB,respectively)and positive values of δ18O(2.19‰PDB and 2.96‰PDB,respectively)in comparison with‘normal carbonates’.These isotopic compositions of the carbonates suggest that methane participated in the formation of carbonates,due to its anaerobic oxidation.The methane-derived carbonates are the recorders of methane-associated seeping,which is ac-tive on the seafloor of northeastern South China Sea in the past.

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