黔北早寒武世缺氧事件：生物标志化合物及有机碳同位素特征
Early Cambrian oceanic anoxic event in northern Guizhou:biomarkers and organic carbon isotope
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摘要: 本文首次报道了黔北早寒武世黑色岩系的生物标志化合物，并结合有机碳同位素组成特征，探讨该时期所发生的重大地质事件。所有样品均检出了丰富的正构烷烃、类异戊二烯烃、萜类化合物以及甾类化舍物。在GC谱图上，正构烷烃显示明显的单峰型分布特征，碳数分布范围为nC14-nC31主峰碳为nC18、nC19或nC20，nC17／nC31为1．15～50．17，显示轻烃组分占绝对优势，OEP值为0．84～1．11，CPI值为0．92～1．16，接近平衡值1．0，无明显的奇偶碳数优势分布。Pr／Ph值为0．24～0．79，具有明显的植烷优势。萜烷化合物以C30藿烷占优势，其相对丰度三环萜烷〉五环三萜烷〉四环萜烷，并且检出少量的γ-蜡烷。规则甾烷C27-C28-C29呈“V”字型分布，∑（C27＋C28）〉∑C29，其比值为1．25～1．99，∑C27／∑C29为0．78～1．22，重排甾烷C27／规则甾烷C27值为0．21～0．47。4-甲基甾烷普遍存在，但丰度相对较低。在地层剖面上，有机碳含量（TOC（％））从0．05～7．91％，平均为2．52％；有机碳同位素组成（δ^13Corg）从-29．49‰～-34．41‰（PDB），发生负偏移，偏移量达到4．3‰，代表该期海平面处于上升阶段，底层水处于严重缺氧状态，底栖生物缺乏。本文根据生物标志化合物特征参数，结合有机碳同位素组成变化，详细分析了黔北早寒武世这套黑色岩系的有机质来源、成熟度、沉积环境以及古海洋意义，将为我国南方早寒武纪古地理重建、地质事件记录提供可靠依据。
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Key words:
- Early Cambrian /
- Black rock series /
- Biomarkers /
- Organic carbon isotope /
- OAE /
- Northern Guizhou
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[1] Bernd Bodiselitsch,Alessandro Montanari,Christian Koeberl and Rodolfo Coccioni.2004. Delayed climate cooling in the Late Eocene caused by multiple impacts:high-resolution geochemical studies at Massignano,Italy.Earth and Planetary Science Letters,223 (3 -4):283-302
[2] Brassell S C,Eglinton G,Maxwell J R,et al.1978. Natural background of alkanes in the aquatic environment.In:Hutzinger O et al.(eds.).Aquatic Pollutanta:Transformation and Biological Effects.Oxford:Pergamon Press,69-86
[3] Clark RC and Blumer M.1967. Distribution of n-paraffins in marine organisms and sediment.Liminology and Oceanography,12 (12):79-87
[4] Curiale J,Lin R,Decker J.2005. Isotopic and molecular characteristics of Miocene-reservoired oils of the Kutei Basin,Indonesia.Organic Geochemistry,36 (3):405-424
[5] Fan P,Li JG,Meng QX,Yu XH and Li ZX.1992. Biomarkers and other hydrocarbons in Upper Sinian stromatolitic dolostones from Southern China.In:Schidlowski et al.(eds).Early organic evolution:Implication for mineral and engery resources.Springer Varlay,228-239
[6] Freeman KH,Wakeham SG and Hayes JM.1994. Predicitive isotopic biogeochemistry:hydrocarbons from anoxic marine basins.Org.Geochem.,21:629-644
[7] Fu JM,Sheng GY and Xu JY,et al.1990. Application of biological markers in the assessment of palaeoenvironments of Chinese nonmarine sediments.Organic Geochemistry,16:769 -779
[8] Golyshev SI,Verkhvskaya NA,Burkova VN,et al.1991. Stable carbon isotopes in sourece-bed organic matter of West and East Siberia.Organic Geochemistry,14:277-291
[9] Grantham PJ,Posthumal J and DeGroot K.1986. Variation and significance of the C27 and C28 triterpane contents of a North Sea core and arious North Sea crude oils.In:Douglas AG,Maxwell JR (eds.).Advances in Organic Geochemistry 1979. New York:Pergamon Press,29-38
[10] Grantham PJ.1986. The occurrence of unusual C27 and C29 sterane predominances in two types of Omm crude oil.Organic Geochemistry,9:1-10
[11] Guo QG,Liu CQ,Harald S and Tatiana G.2004. Isotopic investigation of Late Neoproterozoic and Early Cambrian carbon cycle on the Northern Yangtze Platform,South China.Acta Geoscientica Sinica,25 (2):151-156 (in Chinese with English abstract)
[12] Haas J,Demény A,Hips K and Vennemann TW.2006. Carbon isotope excursions and microfacies changes in marine Permian Triassic boundary sections in Hungary.Palaeogeography,Palaeoclimatology,Palaeoecology,(in press)
[13] Han J and Calvin M.1969. Hydrocarbon distribution of alage and bacteria and microbiological activity in sediments.Nat.Acad.Sci.Proc.,64:436-443
[14] Hu XM and Wang CS.1999. Several major geological events and global climate change since 100Ma.Exploration of Nature,18 (1):53-58(in Chinese with English abstract)
[15] Huang DP,Zhang DJ and Li JC.1989. On origin of 4-methyl steranes and pregnanes.Petroleum Explor.Develop.,16 (3):8-15 (in Chinese with English abstract)
[16] Huang SJ.1994. Carbon isotopes of Permian and Permian-Triassic boundary in upper Yangtze Platform and the mass extinction.Geochimica,23 (1):60-68 (in Chinese with English abstract)
[17] Huang WY and Meinschein WG.1978. Sterols in sediments from Baffin Bay,Texas.Geochem.Cosmochim.Acta,42(9):1391-1396
[18] Jiang YC,Yue WZ and Ye Zhizheng.1994. Anoxic event,black shales and related mineral resources:tahing the Lower Palaeozoic in Southern China as an example.Geological exploration for non-ferrous metals,3 (5):272-278 (in Chinese with English abstract)
[19] Kajiwar Y and Kaiho K.1992. Oceanic anoxic at the Cretaceous/Tertiary boundary supported by the sulfur isotope record.Palaeogeogr.Palaeoclimatol.Palaeoecol.,99:151-162
[20] Kunio Kaiho and Takashi Hasegawa.1994. End-Cenomanian benthic foraminiferal extinctions and oceanic dyaoxic events in the northwestern Pacific Ocean,Palaeogeogr.Palaeoclimatol.Palaeoecol.,111:29-43
[21] Lewan MD.1986. Stable carbon isotopes of amorphous kerogeas from phanerozoic sedimentary rocks.Geochim.Cosmochim.Acta,50:1583-1591
[22] Li RW,Li Z,Wang ZZ and Lin DX.1988. Using molecular fossil indicators for analysis of paleoenvironments of a sedimentary basin,Eastern China.Acta Sedimentologica Sinica,6 (4):108-119 (in Chinese with English abstract)
[23] Li RW,Lu JL,Zhang SK and Lei JJ.1999. Organic carbon isotopes of the Sinian and Early Cambrian black shales on Yangtze platform,China.Science in China,Ser.D,42 (6):595-603
[24] Li SG,Xiao XY,Shen JF,Sun L,Liu B and Yan BL.2003. Rheniumosmium isotope constraints on the age and source of the platinum mineralization in the Lower Cambrian black rock series of HunanGuizhou proveinces,China.Science in China,Ser.D,46(9):919-927
[25] Magaritz M.1989.13C minima follow extinction events,A clue to faunal radiation.Geology,17:337-340
[26] Mao JW,Bernd L,Du AD,et al.2002. Re-Os Dating of Polymetallic Ni-Mo-PGE-Au Mineralization in Lower Cambrian Black Shales of South China and Its Geologic Significance.Economic Geology,72:1051-1061
[27] Moldowan JM,Sundararaman P and Schoell M.1986. Sentivity of biomarker properties to depotional environment and/or source input in the Lower Toarcian of SW-Germany.In:Leythaeuser D and Rul(o)tter JI (eds.).Advances in Organic Geochemistry 1985. Organic Geochemistry,10:915 -926
[28] Peters KE and Moldowan JM.1991. Effects of source,thermal maturity,and biodegradation on the distribution and isomerization of homohopanes in petroleum.Organic Geochemistry,17:47 -61
[29] Pu XC,Zhou HD,Wang XL,et al.1993. Cambrian lithofacies,paleogeography and mineralization in south China.Beijing:Geological Publishing House,61 -77 (in Chinese with English abstract)
[30] Regional Geological Surveying Team,Guizhou Bureau of Geology and Mineral Resources.1992. Atlas of lithofacies and paleogeography of Guizhou:(Mesoproterozoic to Triassic).Guiyang:Science and Technology Publishing House of Guizhou,1-77 (in Chinese)
[31] R(o)hl JH,R(o)hl AS,Oschmann W,Frimmel A and Schwark L.2001. The Posidonia shale(Lower Toarcian) of SW-Germany:An oxygendepleted ecosystem controlled by sea level and palaeoclimate.Palaeogeogr.Palaeoclimatol.Palaeoecol.,165:27-52
[32] Schlanger SO,Arthur MA,Jenkyns HC,et al.1987. The CenomanianTuronian oceanic anoxic event,Ⅰ.Stratigraphy and distribution of organic carbon-rich beds and the marine δ13 Cexcursion.In:Brooks J and Fleet AJ (eds.).Marine Petroleum Source Rocks.Geological Society Special Publication,Blackwell Scientific Publications,26:371-399
[33] Shen Y and Schidlowski M.2000. New C isotope stratigraphy from southwest China:implications for the placement of the PrecambrianCambrian boundary on the Yangtze platform and global correlations.Geology,28:623-626
[34] Shi JY and Xiang MG.1991. Source and evolution of pentacyclotriterpane.Acta Sedimentologica Sinia,9 (sup.):26 -33 (in Chinese with English abstract)
[35] Shi JY,et al.1982. A biological marker investigation of petroleums and shales from the Shengli oilfield,The PRC.Chemical Geology,35:1-31
[36] Stüben D,Kramar U,Harting M,Stinnesbeck W and Keller G.2005. High-resolution geochemical record of Cretaceous-Tertiary boundary sections in Mexico:New constraints on the K/T and Chicxulub events.Geochimica et Cosmochimica Acta,69(10):2559 -2579
[37] Wan XQ,Liu WC,Li GB and Li Yan.2003. Cretaceous black shale and dissolved oxygen content -A case study in southern Tibet.Geology in China,30 (1):36-47 (in Chinese with English abstract)
[38] Wang TG.1990. A contribution to some sedimentary environmental biomarkers in crude oils and source rocks in China.Geochimica,19(3):256 -263 (in Chinese with English abstract)
[39] Wapies DW and Cunningham R.1985. Shipboard organic geochemistry,Leg 80,DSDP.In:Pong W,Graciausky PC,(eds.).Initial Reports Deep Sea Drilling Project.U.S.Government Printing House,Washington,D.C.,80:949-968
[40] Xu WH,Zhang ZY,Sheng P and Meng QX.1997. Biomarkers from the Xiayangao Menber of the Early Ordovician Tonggao Formation in the Sandu Area,Guizhou Provience.Acta Sedimentologica Sinica,15(3):72 -77 (in Chinese with English abstract)
[41] Yang RD,Zhao YL and Guo QJ.1999. Algae and acritarchs and their palaeooceanographic signifiacance from the Early Cambrian black shale in Guizhou,China.Acta Palaeontologica Sinica,38 (Sup.):145 -157 (in Chinese with English abstract)
[42] Zhao YL,Steriner M,Yang RD,Erdtmann BD,Guo QJ,Zhou Z and Wallis E.1999. Discovery and significance of the early metazoan biotas from the Lower Cambrian Niutitang Formation,Zunyi,Guizhou,China.Acta Palaeontologica Sinica,38 (sup.):132 -139(in Chinese with English abstract)
[43] 贵州省地质矿产局区域地质调查大队编著.1992.贵州省岩相古地理图集(中元古代-三叠纪).贵阳:贵州科技出版社,1-77
[44] 胡修棉,王成善.1999.100Ma以来若干重大地质事件与全球气候变化.大自然探索,18(1):53-58
[45] 黄第藩,张大江,李晋超.1989.论4-甲基甾烷和孕甾烷的成因.石油勘探与开发,3:8-15
[46] 黄思静.1994.上扬子二叠系-三叠系初海相碳酸盐岩的碳同位素组成与生物绝灭事件.地球化学,23(1):60-68
[47] 姜月华,岳文浙,业治铮.1994.华南下古生界缺氧事件与黑色页岩及有关矿产.有色金属矿产与勘探,3(5):272-278
[48] 李任伟,李哲,王志珍,林大兴.1988.分子化石指标在中国东部盆地古环境分析中的应用.沉积学报,6(4):108-118
[49] 蒲心纯,周浩达,王熙林等.1993.中国南方寒武纪岩相古地理与成矿作用.北京:地质出版社,61-77
[50] 史继扬,向明菊.1991.五环三萜烷的物源和演化.沉积学报,9(增刊):26-33
[51] 万晓樵,刘文灿,李国彪,李艳.2003.白垩纪黑色页岩与海水含氧量变化-以西藏南部为例.中国地质,30(1):36-47
[52] 王铁冠.1990.试论我国某些原油与生油岩中的沉积环境生物标志化合物.地球化学,19(3):256-263
[53] 许玩宏,张忠英,沈平,孟仟祥.1997.贵州三都早奥陶世同高组下燕高页岩断的生物标志化合物.沉积学报,15(3):72-77
[54] 杨瑞东,赵元龙,郭庆军.1999.贵州早寒武世早期黑色页岩中藻类及其环境意义.古生物学报,38(增刊):145-157
[55] 赵元龙,Steriner M,杨瑞东,Erdtmann BD,郭庆军,周震,Wallis E.1999.贵州遵义下寒武统牛蹄塘组早期后生生物群的发现及重要意义.古生物学报,38(增刊):132-139
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