东昆仑西段布喀达坂峰地区早更新世河湖相地层的发现及初步研究

Discovery and study of the Early Pleistocene river and lake facies stratum in Bukedaban area of the western segment in the eastern Kunlun Mt.

东昆仑西段布喀达坂峰地区的山间盆地中发现一套早更新世河湖相地层,岩石组合为:泥晶灰岩、砂砾石层、泥岩夹生物碎屑层,未见底,顶部被晚更新世地层覆盖。从获得的电子自旋共振测年资料及古生物显示,其时代相当于早更新世,与柴达木盆地七个泉组以及东昆仑垭口盆地羌塘组时代相当。它的发现对分析本地区以及相邻地区在早更新世时的气候演变及高原隆升具有一定的指示意义。

A suit of the Early Pleistocene river and lake facies stratum is discovered in Bukedaban area of the western segment in the eastern Kunlun Mt. Its rock association is mudstone,sand gravel, mudstone with filling bioclast,not uncovered the fundus, the Last Pleistocene stratum covered its top. The dating of ESR and Pal.show its era correspond to the Early Pleistocene, the era of the Qigequa Formation in the Qaidam basin and the Qiangtang Fromation in the narrow mountain pass the eastern Kunlun Mt. This discovery shows particular direction significance for analysis the Early Pleistocene climate evolvement and uplift in the erea and the border upon erea.