摘要
大陆壳约75%的地区是沉积岩,沉积岩的15%是由碳酸盐矿物含量超过50%的碳酸岩所构成。碳酸岩与碳酸岩系是岩溶作用的物质基础。水对碳酸岩的溶蚀是使岩体产生各种地表和地下的岩溶现象的主要作用过程。本文将通过碳酸岩的溶蚀试验及溶解试验的成果来进一步说明不同类型碳酸岩的相对溶解速度及在各种水地球化学环境中的溶度,并讨论它们与岩溶发育的关系。
All surface and subsurface karstic features are made by the corrosion of carbonate rocks by natural waters.First,results of corrosion tests made on the relative soluble velocity or relative corrosity of carbonate rocks show that relative corrosity is mainly controlled by the composition of carbonate rocks and that the amount of relative corrosity of limestone is higher than that of dolomite.The corrosional amount of carbonate rocks including both dissolution and disintegration depends on the texture and genesis of carbonate rocks.Next,the solubility tests of carbonate rocks by the natural waters of different hydrogeochemical types generally show that dolomite has a higher solubility than limestone.Dolomite is more soluble in the natural water of sulphate type,but both dolomite and limestone are not soluble in the natural water of chloride type.These results show that development of karst varies with different types of carbonate rocks under different hydrogeochcmical environments.
作者
张寿越
Zhang Shouyue(Institute of Geology,Academia Sinica)
出处
《地质学报》
1979年第3期247-261,共15页
Acta Geologica Sinica
