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青藏高原东部边缘及邻区马兰黄土的初步研究表明,以昆仑山—布青山—阿尼玛卿山—南秦岭(摩天岭)为界,马兰黄土大致可分为两大沉积区系,以北为热黄土区,物质主要来源于亚洲内陆干旱地区;以南为冷黄土区,物质主要来源于青藏高原。高原隆起和其特殊的地形效应及由以产生的东亚季风、绕流西风和高原季风的相互作用以及源区物质的差异,可能是导致黄土上述差异的主要原因。
Preliminary studies on the Malan loess at the eastern margin of the Tibetan Plateau and its adjacent areas show that the Malan loess can be broadly divided into two major sedimentary facies based on the Kunlun Mountains - Buqingshan - Animaqing Mountains - Nanqinling (Motianling) For the hot loess region, the material comes mainly from the inland arid regions in Asia; the cold loess region to the south and the material mainly comes from the Qinghai-Tibet Plateau. The plateau uplift and its special topographic effects and the interaction between the East Asian monsoon, the westerly anomaly and the monsoon plateau and the differences of source materials may be the main reason for the above differences of loess.