塔里木盆地奥陶系苔虫生物地层学意义  

BIOSTRATIGRAPHIC SIGNIFICANCE OF THE ORDOVICIAN BRYOZOANS FROM THE TARIM BASIN,XINJIANG,NW CHINA

作　　者：黄智斌[1] 昌新玲 杨芝林[1] 吴亚生[3] 姜红霞[3] 

机构地区：[1]中国石油天然气股份有限公司塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [2]联合能源集团有限公司United Energy Group Limited,北京100102 [3]中国科学院地质与地球物理研究所,北京100029

出　　处：《微体古生物学报》2015年第2期136-146,共11页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金项目(编号40802001,41372121)资助

摘　　要：塔里木盆地奥陶系地层的苔虫化石丰富,保存良好,可以根据苔虫组合带进行生物地层的划分和对比。由下至上的6个苔虫化石组合带如下:(1)隐口目未定属组合带,(2)Eridotrypasp.-Bythopora sp.组合带,(3)Amplexopora minnesotensis-Rhinidictya nicholsoni组合带,(4)Prasopora grayae-Moorephylloporina sp.组合带,(5)Hallopora elegantula-Trigonodictya acuta组合带,(6)Atactoporella declivis-Lunaferamita nevadensis-Stictoporellasp.组合带。这6个组合带与各个地层单元对应关系为:鹰山组偶见隐口目未定属组合带,一间房组含Eridotrypasp.-Bythopora sp.组合带的分子,吐木休克组含Amplexopora minnesotensis-Rhinidictya nicholsoni组合带的分子,良里塔格组良五—良四段含Prasopora grayae-Moorephylloporina sp.组合带的分子,良里塔格组良三段含Hallopora elegantula-Trigonodictya acuta组合带的分子,良里塔格组良二—良一段含Atactoporella declivis-Lunaferamita nevadensis-Stictoporella sp.组合带的分子。The bryozoan fossils were abundant and well preserved in the Ordovician in the Tarim Basin,Xinjiang,NW China.Based on the study of their stratigraphic distribution in the Tarim Basin,we found that the bryozoans could be used to subdivide and correlate Ordovician deposits.In this paper,six bryozoan assemblage zones are recognized.They include（in ascending order）：an unidentified cryptostome Assemblage Zone,Eridotrypasp.-Bythopora sp.Assemblage Zone,Amplexopora minnesotensis-Rhinidictya nicholsoni Assemblage Zone,Prasopora grayaeMoorephylloporina sp.Assemblage Zone,Hallopora elegantula-Trigonodictya acuta Assemblage Zone,Atactoporella-Lunaferamita-Stictoporella Assemblage Zone.Their stratigraphic occurrences are in the Yingshan Formation,Yijianfang Formation,Tumuxiuke Formation,Member 4—5 of the Lianglitag Formation,Member 3 of the Lianglitag Formation,and Member 1—2 of the Lianglitag Formation,respectively.

关 键 词：苔虫 苔虫组合带 生物地层 奥陶系 塔里木盆地 新疆 

分 类 号：Q915[天文地球—古生物学与地层学]