塔里木盆地玉北地区蓬莱坝组白云岩类型及成因
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摘要
塔里木盆地玉北地区蓬莱坝组发育粉-细晶自形白云岩、中晶自形-半自形白云岩、粗晶自形-他形白云岩三种白云岩类型。粉-细晶白云岩具纹层状构造,稀土元素配分模式、总稀土含量与同期灰岩相似,氧同位素组成与同期海水成因的白云岩相近,表明白云岩化流体为同期海水,较高的盐度指数指示了相对浓缩的海水条件,较低的有序度值反应出快速的白云岩化过程,为准同生白云岩化的产物,白云石晶间均匀充填富Fe、富Si及高~(87)Sr/~(86)Sr比值的陆源物质,表明玉北地区在蓬莱坝组粉-细晶白云岩沉积期由于相对海平面较低从而受到陆源物质混入的影响。中晶白云岩和粗晶白云岩的稀土元素配分模式、总稀土含量、~(87)Sr/~(86)Sr比值等与同期海水特征相似,表明白云岩化流体为海水,可见残余颗粒结构,成岩温度较低,埋藏较浅,为埋藏的海水以及沿原始颗粒灰岩的粒间孔及可能存在的裂缝等通道向下运移的海水提供的Mg~(2+)导致的白云岩化,后期重结晶作用破坏了粗晶白云岩中的残余颗粒结构并导致其Fe、Mn含量及成岩温度、有序度值高于中晶白云岩,Sr含量及δ~(18)O值低于中晶白云岩。部分中-粗晶白云石边缘可见加大边,表明后期存在少量他源流体导致的次生加大作用。
The Penglaiba Formation dolomites in the Yubei area can be divided into three types,which are laminated micritic-fine euhedral dolomite,medium euhedral-subhedral dolomite,coarse euhedral-anhedral dolomite respectively.The lamina of penecontemporaneous micritic-fine dolomite can be observed from both the core and the thin section.The REE normalized pattern and∑REE of micritic-fine dolomite resemble the characters of contemporaneous limestone.Theδ~(18)O shows similarity with the dolomite precipitated from the contemporaneous seawater.Those characters indicate that the dolomitization fluid of micritic-fine dolomite is contemporaneous seawater.The high salinity index shows a concentrated fluid character and in such an environment the rapid crystallization process results in less ordered dolomite.The high contents of Fe,Si and high~(87)Sr/~(86)Sr in the intercrystal pores of dolostone demonstrate a relative low sea level and the mix of terrigenous material.The seepage reflux originated medium dolomite and coarse dolomite also have similar REE normalized pattern,∑REE and~(87)Sr/~(86)Sr with the contemporaneous seawater,which show the seawater is still responsible for the dolomitization.The residual particles structure and the low diagenesis temperature calculated from theδ~(18)O show that the reflux of seawater along the intergranular pores and fractures results in the dolomitization.The coarse dolomite experiences stronger recrystallization process than the medium dolomite during which the residual particles are destroyed and the value of Fe,Mn,δ~(18)O are higher while Sr are expelled.The secondary outgrowth can also be recognized from the cathode-luminescence image from which we can figure out an obvious brighter margin in some dolostones.
The Penglaiba Formation dolomites in the Yubei area can be divided into three types,which are laminated micritic-fine euhedral dolomite,medium euhedral-subhedral dolomite,coarse euhedral-anhedral dolomite respectively.The lamina of penecontemporaneous micritic-fine dolomite can be observed from both the core and the thin section.The REE normalized pattern and∑REE of micritic-fine dolomite resemble the characters of contemporaneous limestone.Theδ~(18)O shows similarity with the dolomite precipitated from the contemporaneous seawater.Those characters indicate that the dolomitization fluid of micritic-fine dolomite is contemporaneous seawater.The high salinity index shows a concentrated fluid character and in such an environment the rapid crystallization process results in less ordered dolomite.The high contents of Fe,Si and high~(87)Sr/~(86)Sr in the intercrystal pores of dolostone demonstrate a relative low sea level and the mix of terrigenous material.The seepage reflux originated medium dolomite and coarse dolomite also have similar REE normalized pattern,∑REE and~(87)Sr/~(86)Sr with the contemporaneous seawater,which show the seawater is still responsible for the dolomitization.The residual particles structure and the low diagenesis temperature calculated from theδ~(18)O show that the reflux of seawater along the intergranular pores and fractures results in the dolomitization.The coarse dolomite experiences stronger recrystallization process than the medium dolomite during which the residual particles are destroyed and the value of Fe,Mn,δ~(18)O are higher while Sr are expelled.The secondary outgrowth can also be recognized from the cathode-luminescence image from which we can figure out an obvious brighter margin in some dolostones.
引文
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Ding WL,Qi LX,Yun L,Yu TX,Wu LM,Cao ZC and You SG.2012.The tectonic evolution and its controlling effects on the development of Ordovician reservoir in Bachu-Markit,Tarim Basin.Acta Petrologica Sinica,28(8):2542-2556(in Chinese with English abstract)
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Qiu NS,Wang JY,Mei QH,Jiang G and Tao C.2010.Constraints of(U-Th)/He ages on Early Paleozoic tectonothermal evolution of the Tarim Basin,China.Science China(Earth Sciences),53(7):964-976
Shao LY,He H,Peng SP and Li RJ.2002.Types and origin of dolostones of the Cambrian and Ordovician of Bachu uplift area in Tarim Basin.Journal of Palaeogeography,4(2):19-30(in Chinese with English abstract)
Shields GA,Carden GAF,Veizer J,Meidla T,Rong JY and Li RY.2003.Sr,C,and O isotope geochemistry of Ordovician brachiopods:A major isotopic event around the Middle-Late Ordovician transition.Geochimica et Cosmochimica Acta,67(11):2005-2025
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Wu SQ,Zhu JQ,Wang GX,Hu WX,Zhang JT and Wang XL.2008.Types and origin of Cambrian-Ordovician dolomites in Tarim Basin.Acta Petrologica Sinica,24(6):1390-1400(in Chinese with English abstract)
Wu XN,Si CS,Yu G,Wang XF,Chang SY and Pan WQ.2012.Reconstruction of Ordovician lithofacies palaeogeography and petroleum prospecting significance in Tarim basin.Marine Origin Petroleum Geology,17(3):9-17(in Chinese with English abstract)
Wu ZJ,Yao JX and Chen LQ.2012.Ordovician sequence stratigraphy of Keping area,Northwest Tarim Basin.Acta Petrologica et Mineralogica,31(6):875-884(in Chinese with English abstract)
Ye DS.1993.Petrographic and geochemical characteristics of the SinianOrdovician dolomites in northern Tarim Basin.Geochimica,22(1):1-9(in Chinese with English abstract)
Zhang LJ,Li Y,Zhou CG,Li M,Han J and Zhang B.2007.Lithofacies paleogeographical characteristics and reef-shoal distribution during the Ordovician in the Tarim Basin.Oil&Gas Geology,28(6):731-737(in Chinese with English abstract)
Zhao ZJ,Pan WQ,Zhang LJ,Deng SX and Huang ZB.2009.Sequence stratigraphy in the Ordovician in the Tarim Basin.Geotectonica et Metallogenia,33(1):175-188(in Chinese with English abstract)
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丁文龙,漆立新,云露,余腾孝,吴礼明,曹自成,游声刚.2012.塔里木盆地巴楚-麦盖提地区古构造演化及其对奥陶系储层发育的控制作用.岩石学报,28(8):2542-2556
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方大钧,沈忠悦.2001.塔里木地块各时代视磁极及板块漂移.浙江大学学报(理学版),28(1):100-106
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邱楠生,汪集暘,梅庆华,姜光,陶成.2010.(U-Th)/He年龄约束下的塔里木盆地早古生代构造-热演化.中国科学(地球科学),40(12):1669-1683
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Chen YQ and Zhou XY.2009.Geochemical characteristics of Middle Cambrian-Early Ordovician limestone and paleo-ocean reconstruction based onδ18OSMOW,87Sr/86Sr and rare earth elements,Tarim Basin.Marine Geology&Quaternary Geology,29(1):47-52(in Chinese with English abstract)
Ding WL,Qi LX,Yun L,Yu TX,Wu LM,Cao ZC and You SG.2012.The tectonic evolution and its controlling effects on the development of Ordovician reservoir in Bachu-Markit,Tarim Basin.Acta Petrologica Sinica,28(8):2542-2556(in Chinese with English abstract)
Du YM,Yu TX,Hao JL and Qiu HB.2013.Fracture characteristics and control action on hydrocarbon accumulation in Yubei area of Tarim Basin.Fault-Block Oil&Gas Field,20(2):170-174(in Chinese with English abstract)
Fang DJ and Shen ZY.2001.Phanerozoic apparent polar-wander paths of Tarim and plate motion.Journal of Zhejiang University(Sciences Edition),28(1):100-106(in Chinese with English abstract)
Gao ZQ,Wang HM,Fan TL and Liu ZB.2005.Facies,sedimentary system and assembled sequence in Cambrian-Ordovician of Tarim Basin.Xinjiang Oil&Gas,1(1):30-35(in Chinese with English abstract)
Guo F,Lai SH and Guo L.2010.Ordovician sequence stratigraphy and sedimentology in the Dabantage area,Tarim Basin.Journal of Stratigraphy,34(2):135-144(in Chinese with English abstract)
Huang SJ.1992.Relationship between cathodoluminescence and concentration of iron and manganese in carbonate minerals.Journal of Mineralogy and Petrology,12(4):74-79(in Chinese with English abstract)
Huang SJ.2010.Carbonate Diagenesis.Beijing:Geological Publishing House,1-288(in Chinese)
Kawabe I.1996.Convex tetrad effect variations in REE abundances of“North American shale composite”and“Post-Archean Australian average shale”.Geochemical Journal,30(3):149-153
Keith ML and Weber JN.1964.Carbon and oxygen isotopic composition of selected limestones and fossils.Geochimica et Cosmochimica Acta,28(10-11):1787-1816
Land LS.1980.The isotopic and trace element geochemistry of dolomite:The state of the art.SEPM Special Publication,1980,28:87-110
Li C,Wang LS,Guo SP and Shi XB.2000.Thermal evolution in Tarim basin.Acta Petrolei Sinica,21(3):13-17(in Chinese with English abstract)
Li HL,Qiu NS,Jin ZJ and He ZL.2005.Geothermal history of Tarim Basin.Oil&Gas Geology,26(5):613-617(in Chinese with English abstract)
Liu X,Yao JX and Wang Y.1997.The review of tectonic attribution of the Tarim plate.Geological Review,43(1):1-9(in Chinese with English abstract)
Major RP,Lloyd RM and Lucia FJ.1992.Oxygen isotope composition of Holocene dolomite formed in a humid hypersaline setting.Geology,20(7):586-588
Mc Kenzie JA.1981.Holocene dolomitization of calcium carbonate sediments from the coastal sabkhas of Abu Dhabi,U.A.E.:Astable isotope study.The Journal of Geology,89(2):185-198
Qian GR.1999.The structure characteristics of the rock and alkalicarbonate reaction.Ph.D.Dissertation.Nanjing:Nanjing University of Chemical Technology(in Chinese with English summary)
Qiu NS,Wang JY,Mei QH,Jiang G and Tao C.2010.Constraints of(U-Th)/He ages on Early Paleozoic tectonothermal evolution of the Tarim Basin,China.Science China(Earth Sciences),53(7):964-976
Shao LY,He H,Peng SP and Li RJ.2002.Types and origin of dolostones of the Cambrian and Ordovician of Bachu uplift area in Tarim Basin.Journal of Palaeogeography,4(2):19-30(in Chinese with English abstract)
Shields GA,Carden GAF,Veizer J,Meidla T,Rong JY and Li RY.2003.Sr,C,and O isotope geochemistry of Ordovician brachiopods:A major isotopic event around the Middle-Late Ordovician transition.Geochimica et Cosmochimica Acta,67(11):2005-2025
Veizer J.1989.Strontium isotopes in seawater through time.Annual Review of Earth and Planetary Sciences,17:141-167
Wang BJ,Cai MJ,Lin CM,Zhang X,Cheng YZ,Qu CW and Zhang N.2014.Characteristics and origin of lacustrine dolostone of the Paleogene Shahejie Formation in Tanggu area,Bohai Bay Basin.Journal of Palaeogeography,16(1):65-76(in Chinese with English abstract)
Wu SQ,Zhu JQ,Wang GX,Hu WX,Zhang JT and Wang XL.2008.Types and origin of Cambrian-Ordovician dolomites in Tarim Basin.Acta Petrologica Sinica,24(6):1390-1400(in Chinese with English abstract)
Wu XN,Si CS,Yu G,Wang XF,Chang SY and Pan WQ.2012.Reconstruction of Ordovician lithofacies palaeogeography and petroleum prospecting significance in Tarim basin.Marine Origin Petroleum Geology,17(3):9-17(in Chinese with English abstract)
Wu ZJ,Yao JX and Chen LQ.2012.Ordovician sequence stratigraphy of Keping area,Northwest Tarim Basin.Acta Petrologica et Mineralogica,31(6):875-884(in Chinese with English abstract)
Ye DS.1993.Petrographic and geochemical characteristics of the SinianOrdovician dolomites in northern Tarim Basin.Geochimica,22(1):1-9(in Chinese with English abstract)
Zhang LJ,Li Y,Zhou CG,Li M,Han J and Zhang B.2007.Lithofacies paleogeographical characteristics and reef-shoal distribution during the Ordovician in the Tarim Basin.Oil&Gas Geology,28(6):731-737(in Chinese with English abstract)
Zhao ZJ,Pan WQ,Zhang LJ,Deng SX and Huang ZB.2009.Sequence stratigraphy in the Ordovician in the Tarim Basin.Geotectonica et Metallogenia,33(1):175-188(in Chinese with English abstract)
Zhu RX,Yang ZF,Ma XH,Wu HN,Meng ZF,Fang DJ and Huang BC.1998.Paleomagnetic constraints on the tectonic history of the major blocks of China during the Phanerozoic.Science in China(Series D),41(Suppl.2):1-19
陈永权,周新源.2009.塔里木盆地中寒武统-下奥陶统泥晶灰岩地球化学与古海洋学.海洋地质与第四纪地质,29(1):47-52
丁文龙,漆立新,云露,余腾孝,吴礼明,曹自成,游声刚.2012.塔里木盆地巴楚-麦盖提地区古构造演化及其对奥陶系储层发育的控制作用.岩石学报,28(8):2542-2556
杜永明,余腾孝,郝建龙,邱华标.2013.塔里木盆地玉北地区断裂特征及控制作用.断块油气田,20(2):170-174
方大钧,沈忠悦.2001.塔里木地块各时代视磁极及板块漂移.浙江大学学报(理学版),28(1):100-106
高志前,王惠民,樊太亮,刘忠宝.2005.塔里木盆地寒武-奥陶系沉积相沉积体系及其组合序列.新疆石油天然气,1(1):30-35
郭峰,赖生华,郭岭.2010.塔里木盆地大坂塔格奥陶系地层层序及沉积演化.地层学杂志,34(2):135-144
黄思静.1992.碳酸盐矿物的阴极发光性与其Fe、Mn含量的关系.矿物岩石,12(4):74-79
黄思静.2010.碳酸盐岩的成岩作用.北京:地质出版社,1-288
李成,王良书,郭随平,施小斌.2000.塔里木盆地热演化.石油学报,21(3):13-17
李慧莉,邱楠生,金之钧,何治亮.2005.塔里木盆地的热史.石油与天然气地质,26(5):613-617
刘训,姚建新,王永.1997.再论塔里木板块的归属问题.地质论评,43(1):1-9
钱光人.1999.岩石的结构特征与碱碳酸盐反应.博士学位论文.南京:南京化工大学
邱楠生,汪集暘,梅庆华,姜光,陶成.2010.(U-Th)/He年龄约束下的塔里木盆地早古生代构造-热演化.中国科学(地球科学),40(12):1669-1683
邵龙义,何宏,彭苏萍,李瑞军.2002.塔里木盆地巴楚隆起寒武系及奥陶系白云岩类型及形成机理.古地理学报,4(2):19-30
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