新疆东昆仑卡尔瓦西地区马尔争组牙形石的发现及地质意义

通过分析新疆东昆仑卡尔瓦西地区马尔争组中上段地层,揭示该套地层的沉积旋回及韵律特征。沉积标志和微量元素分析表明,该区马尔争组地层为浅海至半深海碳酸盐台地相沉积。对研究区马尔争组采集的牙形石标本进行研究和分析,10件样品中采集到2枚Neogondolella regale化石标本,该牙形石广泛分布于早三叠世斯派斯特期末期—中三叠世安尼期早期。因此,该区原定为二叠系马尔争组的形成时代可能是早中三叠世。

The discovery of conodonts from the Maerzheng Formation in Kaerwaxi of East Kunlun of Xinjiang and its geological significance

This paper describes and analyzes the middle and upper parts of Maerzheng Formation in Kaerwaxi of East Kunlun of Xinjiang, and reveals their characteristics of sedimentary cycles and rhythms. Depositional marks and trace element analysis indicate that the Maerzheng Formation belongs to neritic-bathyal carbonate platform facies. It also analyzes 10 conodont specimens collected from this formation, among which 2 fossil specimens named Neogondolella regale were discovered. This conodont is widespread from Spathian end of Early Triassic to early Anisian of Middle Triassic. Thus, the formation time of the Maerzheng Formation should be Early and Middle Triassic rather than Permian epoch.