SCSIO OpenIR  > 中科院边缘海地质重点实验室
Hydrocarbons in ferromanganese crusts from Pacific seamounts and their implications for the genesis
Zhang, M; Sun, XM; Ting, X; He, GW; Lu, HF; eessxm@mail.systu.edu.cn
2007
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume23Issue:11Pages:3026-3036
AbstractTrace 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.
Department[Zhang Mei; Sun XiaoMing; Xue Ting; He GaoWen; Lu HongFeng] Sun Yat Sen Univ, Dept Earth Sci, Guangzhou 510275, Peoples R China; [Sun XiaoMing] Sun Yatsen Univ, Hidden Deposits Res Inst, Nanjing 210007, Peoples R China; [Sun XiaoMing] Eastern China Geol & Mining Org Non Ferrous Metal, Nanjing 210007, Peoples R China; [Sun XiaoMing] Chinese Acad Sci, Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China; [Sun XiaoMing] Chinese Acad Sci, Key Lab Marginal Sea Geol, S China Sea Inst Oceanol, Guangzhou 510640, Peoples R China; [He GaoWen; Lu HongFeng] Minist Land & Resoures, Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China
KeywordFerromanganese Crusts Hydrocarbons Biomarkers Carbon Isotopic Compositions Genesis
Subject AreaGeology
URL查看原文
Indexed Bysci
Funding Project海洋地质
WOS IDWOS:000254139500032
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/4448
Collection中科院边缘海地质重点实验室
Corresponding Authoreessxm@mail.systu.edu.cn
Recommended Citation
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,&eessxm@mail.systu.edu.cn.(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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.