湖北兴山大峡口中-上二叠统沉积与演化特征
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摘要
湖北省兴山大峡口地区,中-上二叠统出露良好,特征明显,详细的野外剖面测量和室内微相分析表明,此剖面岩相主要由生物碎屑颗粒灰岩、泥晶灰岩、砂屑灰岩、砾屑灰岩、硅质岩等组成,文章就岩相与沉积相的关系做了详细论述。沉积相分析表明,中二叠统主要为碳酸盐斜坡沉积,上二叠统主要为台地沉积,其次为滨岸和盆地沉积,中二叠世和晚二叠世分别构成2个大的海侵海退旋回,呈现出持续稳定沉降的局面。
Middle and Upper Permian in Daxiakou section of Xingshan County,Hubei Province is well exposed and has obvious characteristics.According to the strata study of the field outcrops and the laboratory microfacies study of marine carbonate,five kinds of lithofacies can be recognized including bioclastic grainstone,mudstone,micrite calcisiltite,bcalcirud and silica.The relationship between lithofacies and sedimentary facies is also studied.The results of sedimentary facies analysis show that Middle Permian mainly deposits on the carbonate slope,and Upper Permian mainly on the carbonate platform.The coastal and basin sediments are in the second place.The sedimentary evolution indicates that two sedimentary cycles of transgression and regression occur in the Middle Permian and Upper Permian respectively,and the subsidence is continued,widespread and stable.
Middle and Upper Permian in Daxiakou section of Xingshan County,Hubei Province is well exposed and has obvious characteristics.According to the strata study of the field outcrops and the laboratory microfacies study of marine carbonate,five kinds of lithofacies can be recognized including bioclastic grainstone,mudstone,micrite calcisiltite,bcalcirud and silica.The relationship between lithofacies and sedimentary facies is also studied.The results of sedimentary facies analysis show that Middle Permian mainly deposits on the carbonate slope,and Upper Permian mainly on the carbonate platform.The coastal and basin sediments are in the second place.The sedimentary evolution indicates that two sedimentary cycles of transgression and regression occur in the Middle Permian and Upper Permian respectively,and the subsidence is continued,widespread and stable.
引文
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[14]Mullins H T.Modern carbonate slopes and basins of theBahamas[M]//Plateform Margin and Deep Water Car-bonates,Vol 12.SEPM Short Course Notes,1983:4-1-4-138.
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[2]王正允.湖北兴山大峡口二叠系沉积相及层序地层特征[J].江汉石油学院学报,1998,20(3):4-10.
[3]王辉,胡明毅,王延奇,等.湖北兴山大峡口二叠系剖面沉积相分析[J].海洋石油,2008,28(3):36-41.
[4]罗进雄,何幼斌,王丹,等.湖北兴山大峡口剖面二叠系岩石特征及沉积环境分析[J].古地理学报,2009,11(4):393-404.
[5]陈洪德,王成善,刘文均,等.华南二叠纪层序地层与盆地演化[J].沉积学报,1999,17(4):529-535.
[6]张克信,刘金华,何卫红,等.中下扬子区二叠系露头层序地层研究[J].地球科学:中国地质大学学报,2000,27(4):357-365.
[7]周雁,陈洪德,王成善,等.中扬子区中二叠统层序地层研究[J].地层学杂志,2005,29(3):270-274.
[8]田望学,张汉金,雄伟,等.鄂西南二叠系层序地层与盆地演化[J].资源环境与工程,2007,21(2):95-100.
[9]王小娟,廖卓庭,严惠君.鄂西香溪地区中二叠世地层新观察[J].地层学杂志,2003,27(4):352-357.
[10]王立亭,陆彦邦,赵时九,等.中国南方二叠纪岩相古地理与成矿作用[M].北京:地质出版社,1994:42-86.
[11]李双应,岳书仓.安徽巢湖二叠系栖霞组碳酸盐岩斜坡沉积[J].沉积学报,2002,20(1):7-12.
[12]李双应,孟庆任,万秋,等.长江中下游地区二叠纪碳酸盐斜坡沉积及其成矿意义[J].岩石学报,2008,24(8):1733-1744.
[13]Molina J M,Vera J A.Resedimented carbonate and vol-canic rocks in the Berriasian Hauterivian of the Subbetic(Alamedilla,Betic Cordillera,southern Spain)[J].Creta-ceous Research,2008,29(5/6):781-789.
[14]Mullins H T.Modern carbonate slopes and basins of theBahamas[M]//Plateform Margin and Deep Water Car-bonates,Vol 12.SEPM Short Course Notes,1983:4-1-4-138.
[15]Mullins H T,Cook H E.Carbonate apron models:alterna-tives to the submarine fan model for paleoenvironmental a-nalysis and hydrocarbon exploration[J].Sedimentary Ge-ology,1986,48(1/2):37-79.
[16]牟传龙,丘东洲.湘鄂赣二叠系层序岩相古地理与油气生储盖空间配置[J].海相油气地质,1999,4(3):13-19.
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