Early Holocene High Magnitude Debris Flow Events and Environmental Change as Illustrated by the Moxi Platform, Hengduan Mountains, SW China  

作　　者：ZHANG Junyan CHENG Genwei LI Yongfei 

机构地区：[1]Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada B4P 2R6 [4]Department of Geography, Shangrao Normal College, Shangrao 334001, Jiangxi, China

出　　处：《Journal of Mountain Science》2006年第2期125-130,共6页山地科学学报（英文）

摘　　要：Thick debris flow deposits in the Hengduan Mountains of southwestern China record landscape instability at the close of the last glaciation and in the early Holocene. The deposits, ranging in thickness from 100 to 200 m, are common and in high magnitude in the valleys of this region. They are products of large debris flows induced by glacier and enabled by the presence of large amount of glacial debris on the landscape. The carbon 14 dating from Moxi Platform indicates that a period of catastrophic debris flows occurred at c. 7 kyr B.P., and was concurrent with other glacial-fluvial fans and terraces which tied to regional climatic oscillations elsewhere in the Himalaya. The comparable events suggest a strong climatic control on earth surface processes for the dynamics, magnitude, and frequency in this region.

关 键 词：Debris flows environment change HOLOCENE Hengduan Mountains China 

分 类 号：P542[天文地球—构造地质学]