新疆塔里木板块台地和斜坡相区奥陶系牙形刺生物地层——揭示沉积间断和大坪阶地层之缺失

发布时间：2018-06-12 19:03

本文选题：生物地层 + 牙形刺　；参考：《地层学杂志》2017年04期

【摘要】：新疆塔里木板块台地和斜坡相区,如柯坪、巴楚和塔中井下奥陶系牙形刺序列由下而上可综合为:特马豆克阶的Variabiloconus aff.bassleri生物带,Cordylodus angulatus生物带,Chosonodina herfurthi-Rossodus manitouensis生物带,Glyptoconus quadraplicatus生物带和Tripodus proteus生物带;弗洛阶的Serratognathus diversus生物带和Serratognathoides chuxianensis-Erraticodon tarimensis生物带;达瑞威尔阶的Lenodus variabilis生物带,Yangtzeplacognathus crassus生物带,Dzikodus tablepointensis生物带,Eoplacognathus suecicus生物带和Pygodus serra生物带;桑比阶的P.anserinus-Yangtzeplacognathus jianyeensis生物带,Baltoniodus variabilis生物带和B.alobatus生物带下部,以及凯迪阶的Belodina confluens生物带,Yaoxianognathus neimengguensis生物带,Y.yaoxianensis生物带和Aphelognathus pyramidalis生物带。台地和斜坡相区普遍缺失奥陶系大坪阶的牙形刺生物带,在弗洛阶与达瑞威尔阶之间可能由于海平面的下降事件而未接受沉积。柯坪大湾沟和巴楚一间房剖面仅发育Baltoniodus alobatus生物带下部,在B.alobatus生物带与Belodina confluens生物带之间可能也有间断。
[Abstract]:The Mesa and slope facies of Tarim plate in Xinjiang, such as Keping, Bachu and Tazhong, can be synthesized from the bottom to the top as follows: the variabiloconus aff.bassleri biobelt of Termaduke stage is Chosonodina herfurthi-Rossodus manitouensis belt, Glyptoconus quadraplicatus and Tripodus proteus; The Serratognathus diversus biota and the Serratognathoides chuxianensis-Erraticodon tarimensis biota in the Flor stage; the Lenodus variabilis crassus biobelt in the Daluvir stage, the Eoplacognathus suecicus and Pygodus serra biota in the Dzikodus tablepointensis biota; and the Baltoniodus variabilis and B.alobatus biota in the Sanserinus-Yangtzeplacathus jianyeensis biota, And the Yaoxianognathus neimengguensis biofilm, Y.yaoxianensis and Aphelognathus pyramidalis biota, of the Belodina confluens biota in the Cady stage. The conodont belt of the Ordovician Daping terrace is generally absent in the platform and slope facies regions and may not be deposited between the Frost stage and the Darivier stage due to sea level decline events. Only the lower part of the Baltoniodus alobatus biota is developed in the section of the rooms of Dawanggou and Bachu, and there may be discontinuity between the B. alobatus biosphere and the Belodina confluens biosphere.
【作者单位】：中国科学院南京地质古生物研究所;中国石油化工股份有限公司石油勘探开发研究院;Geological
【基金】：国家基金委创新研究群体项目和基金项目(41521061,41672142,41290260) 中国科学院国际伙伴计划(SAFEA,20140491530)资助 IGCP 653项目“奥陶纪生物大辐射的启动过程”的阶段成果
【分类号】：P534.42;Q911.6

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