中国天山高山冰缘环境中的寒冻风化剥蚀作用及其影响因素

The Denudation Rate of Gelifraction and its Influential Factors in the Periglacial Environment of Tianshan Mountains (in China)

通过量测天山高山冰缘环境中崩落在公路上的寒冻风化碎屑,给出寒冻风化剥蚀速率及其主要影响因素。玉希莫勒盖达坂寒冻风化剥蚀率平均为0.0115m/a,哈希勒根达坂的平均剥蚀率是0.0014m/a,冰达坂的平均剥蚀率是0.0018m/a。对寒冻风化作用的主要影响因素有海拔、坡向、温度和降水、岩性构造及地形条件等。

The gelifraction created debris along the two highways, which pass through the Tianshan Mountains, offers possibility to measure and estimate the frost denudation rate and its main influential factors. The mean rate of gelifraction denudation at Yuximolegai Pass (3 280-3428m above sea level) is 0. 0115 m/a. The mean rate of gelifraction denudation at Haxilegen Pass (3 385-3 510 m) and Bindaban Pass (3 589-4010 m) is 0.0014 m/a and 0.00018 m/a, respectively. The main influential factors are altitude, aspect, temperature and precipitation, lithological characters and structure and relief.