Early Diagenesis Records and Pore Water Composition of Methane-Seep Sediments from the Southeast Hainan Basin, South China Sea
Early Diagenesis Records and Pore Water Composition of Methane-Seep Sediments from the Southeast Hainan Basin, South China Sea
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DOI：
10.1155/2011/592703
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发表时间：
2011-10
期刊：
影响因子：
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通讯作者：
Daidai Wu;N. Wu;Y. Ye;Mei Zhang;Lihua Liu;H. Guan;X. Cong
中科院分区：
文献类型：
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作者：
Daidai Wu;N. Wu;Y. Ye;Mei Zhang;Lihua Liu;H. Guan;X. Cong
通过对南海北方陆坡海南盆地东南部浅层沉积物中几种自生矿物的X射线衍射和扫描电镜分析，确定了它们的主要成分。这些矿物包括各种碳酸盐、硫酸盐和草莓状黄铁矿，这种矿物组合表明存在天然气水合物和甲烷渗漏。矿物的组合和组构特征与冷泉沉积物中的矿物相似，被认为与溶解甲烷培养的微生物有关。孔隙水化学成分分析表明，孔隙水中SO 42-、Ca 2+、Ca ~（2+）、Ca ~（2 +
Several authigenic minerals were identified by XRD and SEM analyses in shallow sediments from the Southeast Hainan Basin, on the northern slope of South China Sea. These minerals include miscellaneous carbonates, sulphates, and framboidal pyrite, and this mineral assemblage indicates the existence of gas hydrates and a methane seep. The assemblage and fabric features of the minerals are similar to those identified in cold-seep sediments, which are thought to be related to microorganisms fostered by dissolved methane. Chemical composition of pore water shows that the concentrations of SO42-, Ca2