摘要
本文详细分析了西宁黄土的粒度组成特征和粒度组成统计参数特征.得出如下结论:1.小于6(?)的粒度含量55％,大于8(?)的粒度含量22％,K(?)2.5、SKI、M(?)6.1(?)均可作为黄土、古土壤的分界指标.2.黄土的物质来源:一是青藏高原内部,其二是亚洲内陆干旱区.
In this paper,the characteristics of grain composition and its statistical par- ameter of Xining loess have been thoroughly analysed. The main conclusions are as follows: 1.Content of <6(?)grains 55%,<8(?)grains 22%,K(?) 2.5、SK1、M(?)6.1 can be used as index of dividing limit between paleosoil and loess layer. 2.There are two sources of loess substance:one is in the inner of Qinghai XiZang plateau,the ether is arid inland regions of MiddleAsia.
出处
《青海师范大学学报（自然科学版）》
1992年第2期58-64,共7页
Journal of Qinghai Normal University(Natural Science Edition)
基金
国家自然科学基金
关键词
黄土
粒度
物质来源
Loess
grain
Substance source
