新疆塔里木盆地奥陶纪冷水型胞石(英文)  

COLD-WATER CHITINOZOAN SPECIES FROM THE ORDOVICIAN SEDIMENTS IN TARIM BASIN, XINJIANG, CHINA

作　　者：唐鹏[1] 耿良玉[1] 张师本[2] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]塔里木石油勘探开发指挥部勘探开发研究院,新疆库尔勒841000

出　　处：《古生物学报》2003年第1期104-110,共7页Acta Palaeontologica Sinica

基　　金：Project supported by the National Natural Science Foundation of China(NNSFC)(grant no.40072005)

摘　　要：文内描述了在新疆塔里木盆地覆盖区QB-1井(黑土凹组)和TZ-32井(却尔却克组)中发现的3种奥陶纪冷水型胞石,即Tanuchitina sp.cf.achabae Paris,Linochitina pissotensis Paris和Siphonochitina bella sp.nov.,时代为中到晚奥陶世。冷水型胞石在奥陶纪主要分布于冈瓦纳大陆北缘和英国等中高纬度地区,沿冈瓦纳大陆边缘向北的洋流将这些中高纬度的表层冷水型胞石带入低纬度的塔里木板块内,热带下沉作用能使它们在深水的盆地相中获得适宜的环境温度而得以生存。Ordovician cold-water chitinozoan species, viz. Tanuchitina sp. cf. achabae Paris, Linochitina pissotensis Paris and Siphonochitina bella sp. nov., are discovered from the TZ-32 Well (the Charchaq Formation) and QB-1 Well (the Heituao Formation) in the Tarim Basin, Xinjiang, China. Species of Linochitina and Siphonochitina were mainly found from high latitude areas. The findings of these species in the Tarim Basin confirms that these cold-water origin genera can be obtained outside the Gondwanaland margin. The age of those fossils is Middle to Late Ordovician. Three species are described and illustrated in the present paper.

关 键 词：新疆塔里木盆地 奥陶纪 冷水型胞石 环境温度 

分 类 号：Q914.2[天文地球—古生物学与地层学]