青海卡巴纽尔多地区上三叠统巴颜喀拉山群牙形石的发现及其意义  

Discovery of the Conodonts in Upper Triassic Bayankalashan Group,Cabanualdo Region,Qinghai Province and Its Significance

作　　者：白国典[1] 王坤 陈泳霖 李伟[1] 谢朝永[1] 何凯[1] BAI Guodian;WANG Kun;CHENG Yonglin;LI Wei;XIE Chaoyong;HE Kai(Key Laboratory of Ore Forming Processes and Resources Utilization o{ Metal Minerals in Henan Province Henan Institute o{ Geological Survey,Zhengzhou 450001,Henan,China)

机构地区：[1]河南省金属矿产成矿地质过程与资源利用重点实验室,河南省地质调查院,河南郑州450001

出　　处：《西北地质》2018年第4期24-32,共9页Northwestern Geology

基　　金：中国地质调查局区域地质调查项目“青海省曲庥莱县卡巴纽尔多地区146E003021、146E004021、146E005021三幅1：5万区域地质矿产调查”(12120113033018)

摘　　要：在青藏高原北部卡巴纽尔多湖—错坎巴昂日东湖一带上三叠统巴颜喀拉山群中首次发现牙形石Epigondolella sp.、Metapolygnathus communisti、Metapolygnathus spp.、Metapolygnathus primitius及有孔虫Gaudryina sp.、Jacullella sp.、Verneulinoides maurtii (Terquem)、Gaudryina triassica Trifonova、Ammodiscus sp.等。其中,Epigondolella与Metapolygnathus均为晚三叠世诺利期典型牙形石和常见类型,有孔虫亦显示为晚三叠世常见分子,从而为厘定该套地层时代提供了重要生物依据,对于该地区巴颜喀拉山群形成于早三叠世和中三叠世早期的观点有待于重新审视。Conodonts （ Epigondolella sp., Metapolygnathus communisti , Metapolygnathus spp. , Metapolygnathus primitius） and foraminifers （Gaudryina sp. , Jacullella sp. , Verneuli noides maurtii （Terquem） , Gaudryina triassica Trifonova, Ammodiscus sp. ） are firstly discov ered in Upper Triassic Bayankalashan Group, Cabanualdo Lake Khampat Kardong Lake region, northern Qinghai Tibet Plateau. In which, Epigondolella and Metapolygnathus are typical and vary common conodonts in Norian Stage of Late Triassic Period. The foraminifers are also show as common elements of Late Triassic Period. Thus, on the basis of these important biological da ta, the strata age in this area can be determined. The traditional opinion of Bayankalashan Group Group formed from Early Triassic to Middle Triassic in this area needs to be reviewed.

关 键 词：牙形石 诺利期 巴颜喀拉山群 卡巴纽尔多 青海 

分 类 号：Q911[天文地球—古生物学与地层学]