天山和阿尔泰山冰碛物孔隙分析  

Void Properties of Till from the Altay Mountains and the Tianshan Mountains,Xinjiang,China

作　　者：易朝露[1] 崔之久[1] 

机构地区：[1]北京大学地理系,中国科学院武汉测量与地球物理研究所

出　　处：《冰川冻土》1994年第3期265-273,共9页Journal of Glaciology and Geocryology

摘　　要：本文采用薄片法对新疆阿尔泰山哈纳斯河流域和天山乌鲁木齐河源区冰上融出碛、冰下融出碛和滞碛的孔隙特征进行了分析。冰上融出碛以不规则大孔隙为主，孔隙的孔径分布范围广，而受到静冰压力和冰川剪切的冰下融出碛和滞碛则以规则的圆孔隙和扁孔隙为主，视孔径主要集中于３—４处。Void features of three types of till from the Halasi River Catchment of the Altay Moun－tains and the source of the Urumqi River of the Tianshan Mountains，Xinjiang， China wereanalysed with the method of thin－section．A　large number of irregular large voids are presentin superglacial meltout till and the visible void－size distributes in wide range．Their origin isascribed mainly to the deposition without cryostatic pressure and iee shearing． Regular voids，such as circular and elliptical voids，prevail in subglacial meltout till and lodgement till．Thevisible void－size concentrates at 3—4．Their origin is attributed to the static pressure of iceload and the ice shearing．

关 键 词：孔隙特征 冰碛 阿尔泰山 天山 河流 

分 类 号：P343.6[天文地球—水文科学]