张智礼,李慧莉,谭广辉,岳勇,蔡习尧,李京昌

• 1:中国石油化工股份有限公司石油勘探开发研究院
• 2:中国石油化工股份有限公司西北油田分公司

摘要(Abstract)：

对塔里木板块中央隆起区3口钻井及巴楚露头区南一沟剖面采集的139个碳同位素样品进行分析对比,查明中上奥陶统碳同位素组成及演化特征。鹰山组δ13 CPDB值均<0,分布范围在-2.50‰~-0.5‰之间,平均值约-1.5‰;一间房组δ13 CPDB值均接近0‰,分布范围在-0.40‰~0.6‰之间,平均值约为0;恰尔巴克组—良里塔格组δ13 CPDB值均>0,分布范围在0.40‰~2.9‰之间,一般在1‰上下,平均值不低于1.2‰。三者δ13 CPDB值差异明显,可作为该区地层划分对比依据。中央隆起区中上奥陶世发生过2次大的δ13 C正漂移,第一次正漂移发生于中奥陶世大坪期(O12)末到达瑞威尔期(O22)初期,δ13 CPDB变化幅度在1‰以上;第二次正漂移发生于中奥陶世达瑞威尔期(O22)末到晚奥陶世桑比期(O13)初期,δ13 CPDB变化幅度接近2‰。2次正漂移导致鹰山组、一间房组、恰尔巴克组以及良里塔格组碳同位素值出现明显差异,这一变化特征与达坂塔格一间房露头区相应层位一致,与贵州桐梓红花园剖面也很相似,与柯坪露头区大致相似。

关键词(KeyWords)： 化学地层;碳同位素;δ13 C正漂移;中-上奥陶统;中央隆起区;塔里木板块

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“塔里木盆地中央隆起区海相碳酸盐岩层系尤其藏主控因素与勘探突破目标评价”(2011ZX05005-004-003)资助

作者(Author): 张智礼,李慧莉,谭广辉,岳勇,蔡习尧,李京昌

DOI: 10.19839/j.cnki.dcxzz.2014.02.006

参考文献(References)：

• 蔡习尧,钱一雄,陈跃,尤东华.2007.塔中地区中下奥陶统划分与对比.新疆石油地质,28(3):292-295.
• 蔡习尧,李越.2008.新疆塔中南坡奥陶系的地层缺失和沉积相变化.地层学杂志,32(4):353-362.
• 蔡习尧,钱一雄,陈强路,陈跃,尤东华,杨玉芳,赵丽娜.2011.塔里木盆地古隆1井奥陶系恰尔巴克组与一间房组的发现及意义.石油实验地质,33(4):348-352.
• 樊茹,邓胜徽,张学磊.2010.碳酸盐岩碳同位素地层学研究中数据的有效性.地层学杂志,34(4):445-451.
• 郭福生,彭花明,潘家永,杜杨松,刘林清,罗能辉,饶明辉,王正其.2003.浙江江山寒武系碳酸盐岩碳氧同位素特征及其古环境意义探讨.地层学杂志,27(4):289-296.
• 胡明毅,钱勇,胡忠贵,王延奇,向娟.2010.塔里木柯坪地区奥陶系层序地层与同位素地球化学响应特征.岩石矿物学杂志,29(2):199-205.
• 李越,黄智斌,王建坡,王志浩,薛耀松,张俊明,张元动,樊隽轩,张园园.2009.新疆巴楚中—晚奥陶世牙形刺生物地层和沉积环境研究.地层学杂志,33(2):113-122.
• 邵龙义,Jones T P.1999.桂中晚二叠世碳酸盐岩碳同位素的地层学意义.沉积学报,17(1):84-88.
• 王宗哲,杨杰东.1994.新疆柯坪地区早古生代地层的碳同位素变化特征及其意义.地层学杂志,18(1):45-52.
• 熊剑飞,武涛,叶德胜.2006.新疆巴楚中-晚奥陶世牙形刺研究的新进展.古生物学报,45(3):359-373.
• 赵宗举,潘文庆,张丽娟,邓胜徽,黄智斌.2009.塔里木盆地奥陶系层序地层格架.大地构造与成矿学,33(1):175-188.
• 周传明,张俊明,李国祥,虞子冶.1997.云南永善肖滩早寒武世早期碳氧同位素记录.地质科学,32(2):201-212.
• Buggisch W,Keller M&Lehnert O.2003.Carbon isotope record of Late Cambrian to Early Ordovician carbonates of the Argentine Precordillera.Palaeogeography,Palaeoclimatology,Palaeoecology,195:357-373.
• Derry L A,Kaufman A J&Jacobsen S B.1992.Sedimentary cycling and environmental change in the Late Proterozoic:evidence from stable and radiogenic isotopes.Geochim Cosmochim Acta,56:1317-1329.
• Emrich K,Ehhalt D H&Vogel J C.1970.Carbon isotope fluctuation during the precipitation of calcium carbonate.Earth Planet SciLett,8:363371.
• Kaufman A J,Jacobsen S R&Knoll A H.1993.The Vendian record of Sr and C isotopic variations in seawater:implications for tectonics and paleoclimate.Earth Planet Sci Lett,120:409-430.
• Kaufman A J&Knoll A H.1995.Neoproterozoic variations in the C isotopic composition of seawater:stratigraphy and biogeochemical implications.Precambrian Research,73:27-49.
• Kouchinsky A,Bengtson S,Gallet Y,Korovnikov I,Pavlov V,Runnegar B,Shields G,Veizer G,Young E&Ziegler K.2008.The SPICE carbon isotope excursion in Siberia:a combined study of the upper Middle Cambrian lowermost Ordovician Kulyumbe River section,northwestern Siberian Platform.Geological Magazine,145(5):609-622.
• Lambert I B,Walter M R,Zhang Wen-long,Lu Song-nian&Ma Guo-gan.1987.Paleoenvironment and carbon isotope stratigraphy of Upper Proterozoic carbonates of the Yangtze Platform.Nature,325:140-142.
• Li D,Ling H F,Jiang S Y,Pan J Y,Chen Y Q,Cai Y F&Feng H Z.2009.New carbon isotope stratigraphy of the EdiacaranCambrian boundary interval from SW China:implications for global correlation.Geological Magazine,146(4):465-484.
• McCrea J M.1950.The isotopic chemistry of carbonates and paleotemperature scale.J Chem Phys,18:849-857.
• Scholle P A&Arthur M A.1980.Carbon isotopic fluctuation in Cretaceous pelatic limestones:potential stratigraphic and petroleum exploration tool.AAPG,64:67-87.
• Zhang Tong-gang,Shen Yan-an&Algeo J T.2010.High-resolution carbon isotopic records from the Ordovician of South China:links to climatic cooling and the Great Ordovician Biodiversification Event(GOBE).Palaeogeography,Palaeoclimatology,Palaeoecology,289:102-112.
• Zhu Mao-yan,Zhang Jun-ming,Li Guo-xiang&Yang Ai-hua.2004.Evolution of C isotopes in the Cambrian of China:implications for Cambrian subdivision and trilobite mass extinctions.Geobios,37:287-301.