新疆罗布泊K1孔岩心中有孔虫化石的发现及其意义

The Discovery of Foraminiferal Fossils in Cores from Hole K1 in Lop Nur, Xinjiang

笔者在新疆罗布泊K1孔第四纪沉积物中,首次发现丰富的有孔虫化石(Ammonia)及与其伴生的介形虫和轮藻化石。Ammonia是中新世至现在世界上常见属种,屑海陆过渡相种群。第四纪罗布泊已距海遥远,不可能发生海侵,根据塔里木盆地新生代海侵史,认为罗布泊K1孔第四纪沉积物中的有孔虫来源于残留海。

Abundant foraminiferal fossils (Ammonia) and their associated ostracoda and charophyta fossils were discovered for the first time in Quaternary sediments of hole K1 in Lop Nur, Xinjiang. Ammonia is a common genus occurring from the Miocene to the present, which belongs to paralic species groups. Lop Nur had been far from the sea in the Quaternary; so marine transgression was not able to take place. According to the history of Cenozoic transgression in the Tarim basin, the authors propose that the origin of species of foraminifers in Quaternary sediments of hole Kl in Lop Nur was related to the relic sea.