青藏高原隆升的黄土高原构造侵蚀效应

研究了青藏高原隆升与亚洲大陆强季风气候的耦合效应、黄土高原的阶段性抬升、构造变形及其构造侵蚀效应。结果表明,青藏高原的隆升引起多种黄土地质灾害。黄土高原的构造抬升导致侵蚀基准面下降,为重力侵蚀、沟谷溯源侵蚀和流水侵蚀提供了有利条件;构造变形使黄土产生构造裂隙、节理,增大了黄土的侵蚀速率,促进了黄土的坍塌和滑坡等侵蚀性地质灾害的发生;地形突变带、活动断裂带及地震活动带等稳定性条件差的黄土分布区,是黄土侵蚀性地质灾害最剧烈的地区。

Geological Hazard Effect in Loess Plateau due to Qinghai-Tibet Plateau Uplift

The coupling among the Qinghai-Tibet plateau uplift and strong monsoon effect in East Asia,structure deformation and staggered uplift of the loess plateau and its tectonic erosion is studied.The results indicate that Qinghai-Tibet plateau uplift have arose multi-geological hazards,and the uplift of loess plateau have induced gravitative,trace to the source and water-flow erosion.The structural deformation has resulted in structural crevices and joints in loess,increased the erosional rate of the loess,and accelerated the collapse and landslide of the loess.Soil erosion is the most intense in large tectonic deformation zones,active fault zones and seismic zones.