黄土高原黄土绿泥石风化强度的空间特征与气候梯度

本项目拟运用X射线衍射、扫描电镜和透射电镜等技术手段，对黄土高原代表性黄土-古土壤层中绿泥石风化作用的时空间变化特征进行系统研究，并结合现代表土样品中绿泥石风化作用的气候控制因素，揭示绿泥石风化过程及变化机制，进一步提取对风化成壤强度较为敏感的绿泥石风化强度指标，分析不同间冰期古土壤绿泥石风化作用的空间梯度特征，结合已有研究资料，探讨在不同间冰期东亚夏季风环流行为特征及其驱动机制。

Spatial gradient of East Asian summer monsoon during the interglaical periods is a crucial issues in the field of the past glabal changes.This project aims to examine the temporal and spatial variations of chlorite weathering of the loess and paleosol samples in the Chinese Loess Plateau using the X-ray Diffraction, scanning electron microscopy and transmission electron microscope. Combining with the climate control factors on chlorite weathering of the modern surface samples, we will reveal the chlorite weathering process and its change mechanism,further develop the chlorite weathering index sensitive to paleo-weathering intensity. By using this index, we will analyze the spatial gradient不 characteristics of chlorite weathering in the different interglacial paleosol. Combined with the results of previous researches, characteristics of Asian summer monsoon in the different interglacial periods and its driving mechanism.