碳酸—硫酸盐岩建造岩溶水化学场模型和溶蚀量评价理论初探

本文讨论了在完整岩溶泉域内,从灰岩裸露的补给区,至灰岩隐伏于地下的径流区宜至深埋区,可溶岩矿物与水相互作用所发生的不同化学作用和分带性;以及不同化学作用下限确定原则和方法;岩溶水化学类型随深度变化规律;可溶岩矿物溶蚀(解)量的方法。

A PRELIMINARY STUDY ON KARST HYDROCHEMICAL FIELD MODELING AND QUANTITATIVE EVALUATION OF ERROSION OF CARBONATE-SULFATE FORMATION

In a spring basin, interaction occurs between carbonate-sulfate rocks and CO2 in different ways. In intake region and shallow buried karst area, mainly carbonate dissoluing process occurs. In deeply buried karst area gypsum and dolomite are the rocks chiefly undergoing dissolving. The lower limit of depth of chemical reaction can be determined by the carbanate saturation index SIc = 1 and sulfate saturation index SIs = 1 respectively. Under the control of the above-mentioned chemical reaction,the chemical property of the groundwater in a spring basin changes regularly. In the intake region, it is bicarbonate type, and in the thickly covered region it becomes sulfate or chloride types. By using Corbel method and correlation analysis the quantity of solution and precipitation of the respective salts can be caleulated. The principles and methods of calculation are given in this paper.