| 南海珠江口盆地深部烃类微渗漏的分子地球化学揭示 |
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| 引用本文： | 茅晟懿,朱小畏,苏明,管红香,孙永革,吴能友.南海珠江口盆地深部烃类微渗漏的分子地球化学揭示[J].海洋学报,2014,36(8):19-29. |
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| 作者姓名： | 茅晟懿 朱小畏 苏明 管红香 孙永革 吴能友 |
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| 作者单位： | 1.中国科学院 广州能源研究所, 广东 广州 510640;中国科学院 广州天然气水合物研究中心, 广东 广州 510640 |
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| 基金项目： | 国家重点基础研究计划（2009CB219506）;国家自然科学基金（41103043,41303067）;中国科学院广州能源研究所所长基金（y107r71001）;有机地球化学国家重点实验室开放基金（OGL-201209）。 |
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| 摘 要： | 对南海珠江口盆地Site4B站位柱状沉积物可溶有机质中正构烷烃进行详细分析,结果显示海底以下65~70cm、80~85cm和85~90cm存在明显的似成熟烃类分布。在气相色谱质谱图上(GCMS),该处存在明显的UCM分布;在烃类分布上,该处以可溶有机质中高碳数正构烷烃奇偶优势趋于消失为特征,CPI为1.15~1.45。同时,整个剖面其他层段沉积有机质中可溶烃类仍以典型的近/现代沉积有机质输入为标志。结合区域地质背景,以及该区域天然气水合物的勘探发现事实,推断Site4B站位海底以下65~70cm、80~85cm和85~90cm烃类异常可能系深部烃类微渗漏所致。
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| 关 键 词： | 珠江口盆地 正构烷烃 UCM 烃渗漏 |
| 收稿时间： | 2013/10/11 0:00:00 |
| 修稿时间： | 2013/11/21 0:00:00 |
Molecular geochemical identification of hydrocarbon microleakage in the Pearl River Mouth Basin of the South China Sea |
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| Mao Shengyi,Zhu Xiaowei,Su Ming,Guan Hongxiang,Sun Yongge and Wu Nengyou.Molecular geochemical identification of hydrocarbon microleakage in the Pearl River Mouth Basin of the South China Sea[J].Acta Oceanologica Sinica (in Chinese),2014,36(8):19-29. |
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| Authors: | Mao Shengyi Zhu Xiaowei Su Ming Guan Hongxiang Sun Yongge and Wu Nengyou |
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| Institution: | 1.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China2.Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China3.Department of Geosciences, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | N-alkane components are studied in Site4B profile sediment from the Pearl River Mouth Basin,northern South China Sea,and the results reveal that "similar mature hydrocarbon" distribution is exhibited from 65 cm to 70 cm,80 to 85 cm and 85 cm to 90 cm below the sea floor. An unresolved complex mixture (UCM) of components dominates the gas chromatography mass spectrum (GC-MS) and high molecular weight n-alkanes trend to show no odd predominace with CPI from 1.15 to 1.45 in these layers. Meanwhile,in other layers,alkanes are characteristic of modern/recent organic matter inputs in the profile. Combined with regional geological background and the exploration of gas hydrate in this area,we may conclude that unusual distribution of alkane from 65 cm to 70 cm,80 to 85 cm and 85 cm to 90 cm below the sea floor is resulted by deep hydrocarbon microleakage. |
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| Keywords: | Pearl River Mouth Basin n-alkanes UCM hydrocarbon seepage |
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