Hydrocarbons in ferromanganese crusts from Pacific seamounts and their implications for the genesis
文献类型：期刊论文
| 作者 | Zhang, M ; Sun, XM ; Ting, X ; He, GW ; Lu, HF |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2007 |
| 卷号 | 23期号:11页码:3026-3036 |
| 关键词 | ferromanganese crusts hydrocarbons biomarkers carbon isotopic compositions genesis |
| ISSN号 | 1000-0569 |
| 通讯作者 | eessxm@mail.systu.edu.cn |
| 中文摘要 | Trace hydrocarbons in the ferromanganese crusts collected from central and west Pacific seamounts were detected by GC and GC-MS, and abundance, biological source, sedimentary environment and maturity of the soluble hydrocarbons in the crusts were investigated preliminarily. The results indicate that the organic matters are mostly of mature hydrocarbons, excepting one. sample. "A"/C ratios reach as high as 9.81 to 21.15. The ratios of 22S/(22S +22R) to C-31-homohopane are 0.43 similar to 0.46, Tm/(Tm + Ts) are 0.40 similar to 0.59. The ratios of C-29 and C-30 hopanes alpha beta/ (alpha beta +beta alpha) are 0.81 similar to 0.85 and 0.85 similar to 0.89, respectively. Besides, the ratio of C(29)20S/(20S + 20R) rearranged-sterane and C-29 alpha beta beta/(alpha beta beta + alpha alpha alpha) sterane gave values of 0.45 similar to 0.60 and 0.35 similar to 0.42, respectively. Consequently, the calculated vitrinite reflectance, R-sc ( %), varies between 0.73 % to 0.81 %, occasionally 1.06%. Abundance sequence of the measured sterane is C-29-sterane > C-27-sterane > C-28-sterane, pregnane and 4-methy steranes are also identified. The organic matters in ferromanganese crusts are composed predominantly of Type II ones. The pristane/phytane ( Pr/Ph) ratios for the ferromanganese crusts are 0.35 similar to 0.82, indicating that the hydrocarbon were probably deposited in a strong reducing environment. Composition and distribution of n-alkanes, acyclic isopenoid, terpanes and steranes seem to show that the organic matters sourced from algae or microbes and terrestrial plants. Submarine hydrothermal activity might have supplied heat energy for thermal evolution of hydrocarbon in the crusts. It is proposed that the hydrocarbons were generated in a strong reducing submarine environment, transported to the seamounts and finally entered the crusts by pervasion or infiltration. |
| 学科主题 | Geology |
| 收录类别 | SCI |
| 原文出处 | SCIENCE CHINA PRESS |
| WOS记录号 | WOS:000254139500032 |
| 公开日期 | 2011-07-03 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/4448]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, M,Sun, XM,Ting, X,et al. Hydrocarbons in ferromanganese crusts from Pacific seamounts and their implications for the genesis[J]. ACTA PETROLOGICA SINICA,2007,23(11):3026-3036. |
| APA | Zhang, M,Sun, XM,Ting, X,He, GW,&Lu, HF.(2007).Hydrocarbons in ferromanganese crusts from Pacific seamounts and their implications for the genesis.ACTA PETROLOGICA SINICA,23(11),3026-3036. |
| MLA | Zhang, M,et al."Hydrocarbons in ferromanganese crusts from Pacific seamounts and their implications for the genesis".ACTA PETROLOGICA SINICA 23.11(2007):3026-3036. |
入库方式： OAI收割
来源：南海海洋研究所
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