塔中地区上奥陶统恰尔巴克组存在依据

The Existence Basis of the Upper Ordovician Qrebake Formation in Tazhong Area

以塔里木盆地奥陶纪构造研究为基础,结合岩性、电性特征和古生物(包括微量元素)分析,认为塔中地区恰尔巴克组沉积在加里东中期运动Ⅰ幕之后,沉积较连续,无较长时间沉积间断;古生物及微量元素均指示恰尔巴克组为较深水沉积环境。通过与塔北地区恰尔巴克组岩性、电性特征对比分析,认为塔中地区存在能够与塔北相对比的恰尔巴克组。

Based on the study of tectonic setting in Tarim Basin and combined with lithology, logging and paleontologi- cal data（microelement）, this article believes that Qrebake Formation deposits after the first episode of Middle Caledo- nian Orogeny and the deposition is continuous without long time sediments hiatus;Paleontological data and microele- ment of Qrebake Formation can indicate deep-water environment;Compared with the lithology and logging of TaBei＇ s Qrebake formation, it is believed that there exists a Qrebake Formation in Tazhong,which could compared with the Qre- bake Formation in Tabei area.