新疆塔里木盆地中—下奥陶统牙形石新种  

NEW SPECIES OF THE LOWER—MIDDLE ORDOVICIAN CONODONTS FROM THE TARIM BASIN IN XINJIANG

作　　者：赵治信[1] 黄智斌[1] 杜品德[1] 张桂芝[1] 肖继南[1] 谭泽金[1] 

机构地区：[1]塔里木油田公司勘探开发研究院,新疆库尔勒841000

出　　处：《微体古生物学报》2005年第1期29-38,共10页Acta Micropalaeontologica Sinica

摘　　要：本文研究了塔里木盆地中下奥陶统 3 个牙形石新种:Cornuodus ani sp. nov., Erraticodon tarimensis sp.nov.和Trigonodus barnesi sp. nov.,并讨论了Erraticodon Dzik一属的演化。Ordovician sediments in Tarim Basin can be devided into platform, basin and slope sedimentary facies. Platform facies crop out partly along the north-western margin of Tarim Basin, including Keping and Bachu area, but most of them are covered by the Taklamagan desert in Xinjiang, China. The subsurface sequences have been penetrated by numerous petroleum drill holes, such as North Tarim Basin (LN, YM), central Tarim Basin (TZ), Mazhatag area and so on. The lower Lower—Middle Ordovician consists of limestone alternating with dolomite, the middle-upper Lower—Middle Ordovician consists of limestone and argillaceus limestone containing chert gravel with abundant conodont fossils (11 conodont zones). This article restudies previously described conodont fossils and establishes three new species: Cornuodus ani sp. nov., Erraticodon tarimensis sp. nov. and Trigonodus barnesi sp. nov.

关 键 词：牙形石 新种 演化 塔里木盆地 下奥陶统 新疆 

分 类 号：Q911[天文地球—古生物学与地层学]