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新疆塔里木盆地塔中中2井上奥陶统牙形刺化石及生物礁发育时代

CONODONTS FROM THE UPPER ORDOVICIAN IN WELL Z2 OF THE CENTRAL TARIM BASIN AND THE AGE OF CONODONT-BEARING REEFAL BEDS

【Author in Chinese】 蔡习尧袁晓红吴亚生

【Author】 CAI Xiyao;YUAN Xiaohong;WU Yasheng;Research Institute of Exploration & Production,SINOPEC;Exploration and Development Research Institute of Huabei Oilfield Branch Company;Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences;

【Institution】 中国石油化工股份有限公司 石油勘探开发研究院中国石油华北油田分公司勘探开发研究院中国科学院地质与地球物理研究所中国科学院油气资源研究重点实验室

【Abstract in Chinese】 首次在新疆塔里木盆地塔中地区中2井上奥陶统良里塔格组礁岩中发现保存精美的牙形刺化石,包括6属13种和未定种,含一个新亚种Belodina longxianensis minor subsp.nov.。根据牙形刺化石确定,良里塔格组上部属于上奥陶统中部的Belodina confluens带。中2井良里塔格组第2—4层生物礁发育的精确时代是Belodina confluens带。

【Abstract】 Conodonts including 13 species in 6genera are described from the Lianglitag Formation in Well Z2 of the central Tarim Basin,which ranges from 5 474 to 6 284 m.They are Aphelognathus pyramidalis?,Aphelognathus divergens?,Belodina confluens,Belodina baiyanhuaensis,Belodina longxianensis,Belodina longxianensis minor subsp.nov.,Belodinasp.A,Belodinasp.B,?Microzarkodinasp.,Panderodus gracilis postoscrobus,Plectodinacf.bidentata,Plectodinasp.,Yaoxianognathus lijiapoensis?and Yaoxianognathus yaoxianensis?.Occurrence of Belodina confluens at 5 522—5 531.6mindicates that this interval belong to the Belodina confluens Zone.Depth of5 531.6—6 197.3mprobably belongs to the Belodina confluens Zone,and this needs more study to confirm.Five beds of reef-facies occur in the Lianglitag Formation.The reefal beds 2to 5belong to the Belodina confluens Zone.

【Keywords in Chinese】 牙形刺生物礁良里塔格组上奥陶统塔里木塔中新疆
【Key words】 ConodontsLianglitag FormationUpper OrdovicianTarim BasinXinjiangChina
【Fund】 国家自然科学基金项目(编号40802001,41372121);973项目(2012CB214806)资助
  • 【Source】 微体古生物学报 ,Acta Micropalaeontologica Sinica , Editorial E-mail ,2014(03)
  • 【CLC code】Q913.2;P618.13
  • 【Downloads】109
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