我国西南岩溶石漠化及其地质影响因素分析

我国西南地区有大面积碳酸盐岩出露,自20世纪50年代末以来,逐渐形成了十多万平方公里的岩溶石漠化.本文在前人岩溶石漠化问题研究的基础上,进一步充实了岩溶石漠化的概念;提出应统一使用"岩溶石漠化"术语的建议;指出以往岩溶石漠化影响因素研究存在有对地质因素重视不够的问题.与此同时,本文还以野外对岩溶石漠化的观察为基础,从碳酸盐岩的矿物成分、化学成分,碳酸盐岩的结构、构造,碳酸盐岩岩层的组合关系,以及碳酸盐岩出露地区的地质构造等角度,分析了地质因素对岩溶石漠化形成、演变的重要影响,结果认为在诸多岩溶石漠化影响因素中,起决定性作用的是自然因素;在诸多的自然因素中,起主导作用的则是地质因素.

KARST ROCKY DESERTIFICATION AND ANALYSIS ON THE GEOLOGICAL FACTORS IN SOUTHWEST CHINA

There is large range of karst area in southwest China.Karst rocky desertification has gradually formed to the extent over 100 thousand square kilometer from 1950s.This paper supplements the concept of karst rocky desertification,and it is put forward that the term of which should be used congruously on the foundation of the former studies,it is also pointed out that geological factors have not been attached importance to.Simultaneously,influence that geological factors imposed on karst rocky desertification in the development and evolution of which was analyzed from such aspects as mineral or chemical ingredients,configuration or structure and combination situation of stratum of carbonate rock through field investigation and so on.As a result,natural factors play an essential role in karst rocky desertification development,and geological factors act as dominance role among natural factors.