巴楚隆起与阿瓦提凹陷寒武系及奥陶系沉积古地理分析

根据野外露头、钻井资料分析,对塔里木盆地巴楚隆起东部和阿瓦提凹陷东南部寒武系和奥陶系进行了沉积与古地理分析。研究表明,该区寒武系和奥陶系总体上表现为从深—浅—深的沉积环境演化过程。早寒武世早期经历了短暂的深水盆地环境后,自早寒武世中晚期至中寒武世演变为局限台地——蒸发盐台地环境;晚寒武世至早奥陶世海平面开始逐渐上升,以开阔台地环境为主,至晚奥陶世中期演变为台地边缘斜坡环境。 

Sedimentology and palaeogeography of the Cambrian-Ordovician in Bachu uplift and Awati depression,the Tarim Basin

Based on outcrop observation and drilling data analysis,it is carried out that the research on the sedimentology and palaeogeography of the Cambrian and Ordovician in the east of Bachu uplift and southeast of Awati depression.During the period of Cambrian-Ordovician,the sedimentary environments developed from deep to shallow water,then to deep water again.The study area was a deep-sea trough in the early stage of early Cambrian,and then evolved to a restricted platform and evaporated platform from middle-late stage of early Cambrian to middle Cambrian.From late Cambrian to middle Ordovician,the sea level began to raise gradually,the area was dominated by an open platform,and evolved to a platform marginal slope in the middle stage of late Ordovician.