【摘要】 本文阐述了祁连山北缘地带晚更新世末至全新世黄土的分布持征,并用热释光法测定了其年龄。根据黄土的热释光年龄,推断本区Ⅲ级阶地的形成年代略早于14ka和榆木山断裂在小磁窑口段的平均水平位错速率为1.5mm/a。更多还原

【Abstract】 The distribution feature of Icess along the north boundary of Qilianshan Mountain in the last late-Pleistocene to Holocene and the TL age was described. According to the TL age cf the loess, it is inferred that the formation age of the third terrace is a little more than 14 ka and the holizontal dislocated rate in average is 1.5 mm/a in Xiaociyaokou segment of Yumushan Fault.更多还原