塔里木盆地覆盖区奥陶纪生物地层
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摘要
塔里木盆地奥陶系出露于盆地周缘并在覆盖区主要构造单元钻遇。覆盖区奥陶系包括台地相、斜坡相和槽盆相三大类型；含有冷水型和暖水型牙形石化石及珊瑚、笔石、三叶虫和几丁虫等化石，共划分出57个带或组合。根据多门类化石将盆地奥陶系诸多岩石地层单元的时代、中-上奥陶统和寒武系界线进行标定；分别对各构造单元内部及全盆地奥陶系各地层单元进行对比；指出盆地内存在相带变化、奥陶系内部地层间断等问题。
The ordovician is outcropped in peripheral of Tarim basin and was encountered in drilling of main structure of the cover area. The ordovician in cover area includes platform facies, slope facies and trough basin facies in which there exist fossils such as cold water and warm water condont, anthozoa, graptolite, trilobita and chitinozoa etc., and 57 fossil belts or combinations can be divided. Moreover, the age of stratigraphic unit and the boundary between Middle-Upper Ordovician and Cambrian was demarcated, and the stratigraphic unit of Ordovician in each structure and basin were correlated. It is pointed out that there exist the facies changes, rock unit diachroneity and discontinuity of interior formations in Ordovician.
The ordovician is outcropped in peripheral of Tarim basin and was encountered in drilling of main structure of the cover area. The ordovician in cover area includes platform facies, slope facies and trough basin facies in which there exist fossils such as cold water and warm water condont, anthozoa, graptolite, trilobita and chitinozoa etc., and 57 fossil belts or combinations can be divided. Moreover, the age of stratigraphic unit and the boundary between Middle-Upper Ordovician and Cambrian was demarcated, and the stratigraphic unit of Ordovician in each structure and basin were correlated. It is pointed out that there exist the facies changes, rock unit diachroneity and discontinuity of interior formations in Ordovician.
引文
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[14] Webby B D. Towards on Ordovician time scale[C].In: CooperJ D, et al.Ordovician.Odyssey Shortpapers for the seventh international symposium on theOrdovician syatem,1995. 1-10.
[2]安太庠,张放,向维达,等.华北及邻区牙形石[M].北京:科学出版社,1983.
[3]安太庠,郑昭昌.鄂尔多斯盆地周缘的牙形石[M].北京:科学出版社, 1990.
[4]全国地层委员会.《中国地质年代表》(推荐方案)[J].地层学杂志,1998,22(4):299-303
[5]周志毅,陈丕基.塔里木生物地层和地质演化[M].北京:科学出版社,1990.
[6]新疆地质矿产局地质矿产研究所,新疆地质矿产局第一区测大队.新疆古生界(新疆地层总结之二)(上)[M].乌鲁木齐:新疆人民出版社,1990.
[7]新疆石油管理局南疆勘探公司,滇黔桂石油勘探局石油地质勘探所著.塔里木盆地震旦纪至二叠纪地层古生物(Ⅰ),库鲁克塔格分册[M].南京:南京大学出版社,1990.
[8]新疆石油管理局南疆勘探公司,江汉石油管理局勘探开发研究院著.塔里木盆地震旦纪至二叠纪地层古生物(Ⅱ),柯坪-巴楚地区分册[M].北京:石油工业出版社, 1991
[9]葛梅钰,郑昭昌,李玉玲.宁夏及其邻近地区奥陶纪、志留纪笔石地层及笔五带[M].南京:南京大学出版社,1990.
[10]卢衍豪.中国的三叶虫[M].北京:科学出版社,1965.
[11]赵治信,雍天寿,贾承造,等.塔里木盆地地层[M].北京:石油工业出版社,1997.
[12] Chen Xu,Rong Jiayu,Wang Xiaofeng et al. Correlationof the Ordovician rocks of China[M].InternationalUnion of Geological Sciences Publication,1995.31.
[13] Bergstrom S M. Biostratigraphi and BiogeographicSignificance of Middle and Upper Ordovician Conodontsin the Girvan Succession,South-West Scotland [M].Courier Forsch. Inst.Senckenberg,1990.1-43.
[14] Webby B D. Towards on Ordovician time scale[C].In: CooperJ D, et al.Ordovician.Odyssey Shortpapers for the seventh international symposium on theOrdovician syatem,1995. 1-10.
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