Distribution of Palygorskite in the Zhaojiachuan Section of Chinese Loess Plateau and Its Paleoclimate Significance

• 责任者：Yue Tongbo (School of Natural Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Chen Tianhu
• 刊名：Geological Journal of China Universities
• 出版年：2010
• 卷期：16(3)
• 关键词：坡缕石 ; palygorskite ; 古气候 ; paleoclimate ; 甘肃 ; Gansu Province
• 页码：p.383-387
• 图表：4 illus., 29 refs.
• 分类号：1200
• issnNo：ISSN1006-7493
• isbnNo：CN32-1440/P

Palygorskite is an important environmental and climate change indicator mineral. The formation of autogenic palygorskite may indicate a dry, high-evaporation environment. Using field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD), the authors investigated the palygorskite content and palygorskite distribution in the Zhaojiachuan section, Xifeng, Gansu Province. The results showed that palygorskite began to appear at 2.04 Ma.  The authors proposed that the palygorskite changes are correlated with the uplift of the Qinghai-Tibetan Plateau during the Late Miocene and coupled with the development of the Asian inland drought. It evidenced the important control of the Qinghai-Tibetan Plateau uplift over the East Asian monsoon and the eolian deposits.