塔里木盆地塔东1井奥陶纪几丁虫组合划分及地层对比  

ASSEMBLAGE DIVISION OF ORDOVICIAN CHITINOZOAS AND STRATIGRAPHIC CORRELATION FOR TADONG WELL-1 IN TARIM BASIN

作　　者：薛云飞[1] 李倜[1] 万传彪[1] 张君龙[1] 金玉东[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2014年第1期42-47,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目"吉林东部陆生植物对早白垩世大洋缺氧事件的响应"(31270277)资助

摘　　要：为解决塔里木盆地东部奥陶纪地层划分对比问题,选择地层标准井——塔东1井开展了海相几丁虫生物地层学研究。研究认为:奥陶纪的几丁虫有13属33种,自下而上可划分5个组合带,其中Ancyrochitina alaticornis-Cyathochitina dispar组合带分布在突尔沙克塔格群,地质时代为早奥陶世早期;Cyathochitina calix组合带分布在黑土凹组,地质时代为中奥陶世大湾期末期—达瑞威尔期初期;Cyathochitina cf.campanulaeformis组合带分布在却尔却克组—杂土坡组第5段,地质时代为中奥陶世达瑞威尔期;Acanthochitina barbata-Angochitina capillata组合带分布在却尔却克组—杂土坡组第2段底部,地质时代为晚奥陶世艾家山期;Cyathochitina macastyensis组合带分布在却尔却克组—杂土坡组第2段上部,地质时代为晚奥陶世艾家山期。In order to solve the problems of stratigraphic division and correlation for Ordovician formations in East Tarim Basin, the standard well-Tadong Well-1 is chosen for the biostratigraphic researches about the marine chiti- nozoas. The studies show that there are 13 genera and 33 species of Chitinozoa in Ordovician period, and from bot- tom to top, the Chitinozoas can be divided into 5 assemblage belts. Among them, Ancyrochitina alaticornis Cya- thochitina dispar belt is distributed in Tursaktag group, and its geological time is Early Ordovician Epoch; Cyatho- chitina calix belt is located in Heituao Formation and its geological time belongs to Late Dawan stage and Early Dar- rin Weill stage in Middle Ordovician Epoch; Cyathochitina cf. Campanulaeformis belt is in Queerquek Formation and Member 5 of Zatupo Formation, its geological time is Darrin Weill stage in Middle Ordovician Epoch ; Acan- thochitina barbata and Angochitina capillata assemblage belt is distributed in Queerquek Formation and Member 2 at the bottom of Zatupo Formation, its geological time in Aijiashan stage of Late Ordovician Epoch ; Cyathochitina macastyensis assemblage belt is distributed in Queerquek Formation and on the top of Member 2 of Zatupo Formation, its geological time is Aijiashan stage of Late Ordovician Epoch.

关 键 词：塔里木盆地 塔东1井 奥陶纪 几丁虫 组合带 地层对比 

分 类 号：P534.42[天文地球—古生物学与地层学]