DISTRIBUTION AND ORIGIN OF CYCLOALKANE AND MONOCYCLICAROMATIC IN SEEP-CARBONATES FROM LOWER SLOPES OF GULF OF MEXICO
-
摘要: 研究了墨西哥湾水深约2 200 m的下陆坡Alaminos Canyon 645区块(AC 645区)冷泉碳酸盐岩中含量较高的烷基环戊烷、烷基环己烷、直链烷基苯及苯基烷烃化合物的组成和分布特征。烷基环戊烷和烷基环己烷以低碳数烃占绝对优势,主峰碳分别为C14和C15,目前发现的烷基环己烷主要来源于嗜热嗜酸的细菌或藻类直链脂肪酸经环化作用的产物。烷基苯碳数分布范围为C13-C23,以C13-C20的低碳数烷基苯为主,主峰碳为C16,具有明显偶碳优势,很可能来源于冷泉渗漏环境中的喜盐细菌。Abstract: Reported in this paper are the composition and distribution of alkyl cyclopentanes, alkyl cyclohexanes, linear alkylbenzenes and phenylalkanes in the seep carbonate from AC 645 (Sample AC-E) at the lower slope of Gulf of Mexico, where the water depth is 2 200 m. The distribution of alkyl cyclopentanes and alkyl cyclohexanes is similar to normal alkanes, which are dominated by low molecular weight compounds and maximized at C14,C15, respectively, suggesting that the alkyl cyclopentanes and alkyl cyclohexanes are mainly originated from bacteria and phytoplankton. The carbon number of alkylbenzenes are C13-C23, obviously dominated by even-numbered carbon and maximized at C16, which are probably originated from halophilic bacteria or bacterium or sulfate-reducing bacteria in seep site, and the three group phenylalkanes are likely originated from blue green microalgae and planktonic organisms.
-
Key words:
- alkyl cyclopentanes /
- alkyl cyclohexanes /
- alkylbenzenes /
- seep carbonate /
-
[1] 谢树成,黄成雨,黄俊华.重大地质突变期生物与环境事件的分子化石记录[J].地学前缘,2006,13(6):208-217.
[XIE Shucheng,HUANG Xianyu,HUANG Junhua,et al.Molecular fossil records as a proxy of the biotic and environmental events during critical geological periods[J].Earth Science Frontiers,2006,13(6):208-217.]
[2] 谢树成,梁斌,郭建秋,等.生物标志化合物与相关的全球变化[J].第四纪研究,2003,23(5):521-528.
[XIE Shucheng,LIANG Bin,GUO Jianqiu,et al.Biomarkers and the related global change[J].Quaternary Sciences,2003,23(5):521-528.]
[3] Roberts H H,Aharon P.Hydrocarbon-derived carbonate buildups of the northern Gulf of Mexico continental slope:a review of submersible investigations[J].Geo-Marine Letters,1994,14:135-148.
[4] MacDonald I R,Guinasso J N L,Sassen R,et al.Gas hydrate that breaches the sea floor on the continental slope of the Gulf of Mexico[J].Geology,1994,8(22):699-702.
[5] Pancost R D.Lipid biomarkers preserved in hydrate-associated authigenic carbonate rocks of the Gulf of Mexico[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2005,227:48-66.
[6] Zhang C L,Li Y,Wal J D,et al.Lipid and carbon isotopic evidence of methane-oxidizing and sulfate-reducing bacteria in association with gas hydrates from the Gulf of Mexico[J].Geology,2002,30:239-242.
[7] Zhang C L,Pancost D,Sassen R,et al.Archaeal lipid biomarkers and isotopic evidence of anaerobic methane oxidation associated with gas hydrates in the Gulf of Mexico[J].Organic Geochemistry,2003,34:827-836.
[8] Lanoil B D,Sassen R,La Duc M T,et al.Bacteria and Archaea physically associated with Gulf of Mexico gas hydrates[J].Applied and Environmental Microbiology,2001,67:5143-5153.
[9] Mills H J,Hodges C,Wilson K,et al.Microbial diversity in sediments associated with surface-breaching gas hydrate mounds in the Gulf of Mexico[J].FEMS Microbiology,Ecology,2003,46:39-52
[10] Feng D,Chen D F,Qi L,et al.Petrographic and geochemical characterization of seep carbonate from Alaminos Canyon,Gulf of Mexico[J].Chinese Science Bulletin,2008,53(11):1716-1724.
[11] Roberts H H,Fisher C R,Bernard B J M,et al.ALVIN explores the deep northern Gulf of Mexico slope[J].EOS Transactions,American Geophysical Union,2007,88:341-342.
[12] Coffin R L,Hamdan,et al.Analysis of methane and sulfate flux in methane-charged sediments from the Mississippi Canyon,Gulf of Mexico.[J]Marine and Petroleum Geology,2008,25(9):977-987.
[13] Birgel D,Thiel V,Hinrichs K U,et al.Lipid biomarker patterns of methane-seep microbialites from the Mesozoic convergent margin of California[J].Organic Geochemistry,2006,37(10):1289-1302.
[14] Pape T,Blumenberg M,Seifert R,et al.Lipid geochemistry of methane-seep-related Black Sea carbonates[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2005,227:31-47.
[15] 宋之光,王翠萍.墨西哥湾沉积物中PMIA系列生物标记物及其碳同位素组成[J].科学通报,2005,50(24):2769-2773.
[SONG Zhiguang,WANG Cuiping.The biomarkers of 2,6,10,15,19-pentamethylicosenes and their carbon isotopic composition in the sediments from the Gulf of Mexico[J].Chinese Science Bulletin,2006,51(14):1736-1740.]
[16] Connan J,Bouroullec J,Dessort D,et al.The microbial input in carbonate-anhydrite facies of a sabkha paleenviroment from Guatemala:A molecular approach[J].Organic Geochemistry,1986,10:29-50.
[17] 王翠萍.墨西哥湾-南海海底表层沉积物中有机质组成与分布特征研究[D].中国科学院广州地球化学研究所,2006.[WANG Cuiping.A study on the organic composition and distribution in surface sediments from the Gulf of Mexico and South China Sea[D].Guangzhou Institute of Geochemistry Chinese Academy of sciences,2006.]
[18] Oshima M,Ariga T.Cyclohexyl fatty acids in acidophilic thermophilic bacteria[J].Biological Chemistry,1975,250:6963-6968.
[19] Rubinstein I,Strausz O P.Geochemistry of the thiourea adduct fraction from an Alberta petroleum[J].Geochimica et Cosmochimica Acta,1979,43:1387-1392.
[20] Ishiwatari R,Fukushima K.Generation of unsaturated and aromatic hydrocarbons thermal alteration of young kerogen[J].Geochimica et Cosmochimica Acta,1979,43:1343-1349.
[21] 唐运千,卢冰,厉善华.南海沉积物中烷基环己烷、烷基苯、胡萝卜烷和萜烷等化合物[J].东海海洋,1997,15(3):37-46.
[TANG Yunqian,LU Bing,LI Shanhua.Alkyl-cyclohexane,alkylbenzene,carotane,sterane and terpane compounds in core from the South China Sea[J].Donghai Marine Science,1997,15(3):37-46.]
[22] Gallegos E J.Alkylbenzenes derived from carotenes in coals by GC/MS[J].Journal of Chromatography,1981,19:177-182.
[23] Holzer G,Oro J,Tornabene T G.Gas chromatographic-mass spectrometric analysis of neutral lipids from methanogenic and thermoacidophilic bacteria[J].Journal of Chromatography,1979,186:795-809.
[24] 包建平,王铁冠,王金渝,等.新苯基烷烃系列的色谱质谱特征及地球化学意义[J].江汉石油学院学报,1996,18(1):37-41.
[BAO Jianping,WANG Tieguan,WANG Jinyu,et al.Identification and geochemistry of a novel phenyl alkane series[J].Journal of Jianghan Petroleum Institute,1996,18(1):37-41.]
计量
- 文章访问数: 834
- PDF下载数: 3
- 施引文献: 0