地质科学2011，Vol.46Issue(2)：466-474,9.
塔里木盆地古隆1井中上奥陶统牙形石生物地层界线研究
Research of the biostratigraphy boundary on the Middle and Upper Ordovocoan in well GL1 of Tarim Basin
摘要
Abstract
The Gulong-1 well lies in the platform margin slope in Middle and Late Ordovician, the sequence of strata of the Ordovician growth completely. They are divided into three series and six formations. The Upper Ordovician includes Queerqueke Formation and Qaerbake Formation,from top to bottom, the middle is consist of Yijianfang Formation and the upper of Yinshan Formation, the lower comprise the lower of Yinshan Formation and Penglaiba Formation. The sequence of strata is unique, the Middle and Lower Ordovician is identical with that of the Tazhang low uplift, the Upper Ordovician is similar to that of the Tadong region. There are a lot of conodont in the Qaerbake Formation and Yijianfang Formation, they belong to three fossil zone :Pygouds anserinus, P. serrus and Eoplacognathus suecicus. The boundary of Upper and Middle Ordocivian is place in 5 875 m. There is not any lacuna or unconformity. The Lianglitag Formation in the carbonate platform had a phase transformation to the mudstone and calcareous mudstone of 191 m in Gulong-1 well,It display a blank space reflection in the seismic section and is easily followed the trail in the landscape. There are synchronization on the distribution of Qaerbake Formation and Yijianfang Formation, they are hiatus in the main port of Tazheng low uplift and has a distribution in the low-lying of the platform margin or slope.关键词
塔里木盆地/古隆1井/牙形石/中上奥陶统Key words
Tarim Basin/ Gulong-1 well/ Conodont/ Upper and Lower Ordovician分类
天文与地球科学引用本文复制引用
蔡习尧,祁玉平,钱一雄,陈跃..塔里木盆地古隆1井中上奥陶统牙形石生物地层界线研究[J].地质科学,2011,46(2):466-474,9.基金项目
中国石化重点科技攻关项目(编号:P06079)资助. （编号:P06079）
