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河西走廊新生代沉积敏感地记录了青藏高原北部的构造隆升过程.酒泉盆地玉门老君庙剖面高分辨率磁性地层研究表明,疏勒河组胳塘沟段和牛胳套段的年龄分别为>13～8.3 Ma和8.3-<4.9 Ma,玉门砾岩、酒泉砾石层和戈壁砾石层的年龄分别为3.66-0.93,0.84-0.14和0.14-0Ma.岩性和岩相变化表明祁连山自约8 Ma起,6.6 Ma略有加速,由较低的高度开始逐步隆起,盆地沉积从细粒的湖相砂岩-泥岩逐步转变成粗粒的洪积扇沉积,至约3.66 Ma后,祁连山开始急剧地整体快速隆升,并经约<2.94-2.58,<1.8-1.23,0.93-0.84和0.14 Ma多次阶段性快速隆升,祁连山最终被抬升到今天的高度.
The Cenozoic sediments of the Hexi Corridor sensitively recorded the tectonic uplift of the northern Qinghai-Tibet Plateau.Research on the high-resolution magnetic strata of the Laojunmiao Section in the Yumen Basin shows that the ages of the Qitanggou and Niujialu sections in the Shulehe Formation are > 13- 8.3 Ma and 8.3- <4.9 Ma, respectively. The ages of Yumen conglomerate, Jiuquan gravel deposit and Gobi gravel deposit are 3.66-0.93, 0.84-0.14 and 0.14-0Ma, respectively. The lithology and lithofacies change indicate that the Qilian Mountains since about After 8 Ma, 6.6 Ma slightly accelerated and gradually began to rise from a lower height. Basin sediments gradually changed from fine-grained lacustrine sandstone-mudstone to coarse-grained alluvial fan sediments. After about 3.66 Ma, the Qilian Mountains started to sharply As a result, the Qilian Mountains were eventually uplifted to today’s altitude.