重庆西部地区地下热水分布规律及水化学特征

本文根据重庆市西部地区天然温泉及人工揭露的温泉资料,应用统计、规律性分析的方法,对重庆市西部地区地下热水的形成及各背斜轴部、翼部、倾没端的分布、埋藏、运移,以及水量、水温、水化学特征规律进行了系统研究。结果表明:本区地下热水的分布、运移严格受本区的地形地质构造条件和上覆盖层的制约,地下热水主要分布于高隆起开启型、半开启型背斜的轴部及翼部,地下热水主要顺背斜构造线作纵向深部运移;地下热水的水量、水温及水化学特征的变化,从背斜轴部向翼部、倾没端水量增大、水温增高,水化学类型由重碳酸盐型水逐渐过渡为硫酸盐型水。在宽缓的向斜构造区,储热水层埋深大,地下热水径流滞缓,水化学类型为氯化物型水。重庆市西部地区地下热水资源丰富,分布规律明显,开发前景广,为重庆市旅游业、浴疗业、养殖业等经济发展提供了丰富的可再生的天然资源。

Distribution Law and the Feature of Water Chemistry of Geothermal Water in Western Area of Chongqing

According to the data about the natural hot springs and artificially exposed hot springs in the western area of Chongqing, this article applied statistics and regularity analysis method to study the formation of underground hot water in the western area of Chongqing, as well as the distribution burial and migration of anticlinal axis department, wing department and pitching end, and the water volume, water temperature and the feature of water chemistry. The results show that the distribution and migration of underground hot water in this area are strictly restricted by the terrain on the geological structure conditions and constraints of the layer: The underground hot water is mainly distributed in high elevation of open type, half open type anticlinal axis department and limb, and it is mainly along anticline structure line for longitudinal deep migration. The water volume is increased and water temperature is risen from anticlinal axis department to wing department and pitching end, and water chemical type is gradually transformed from bicarbonate type of water into sulfate type of water. In the rolling of the syncline structure area, water storing layer is deep, the underground hot water runoff is stagnant, and the chemical type is chloride type of water.The western area of Chongqing is very rich in geothermal resource with obvious law of distribution, and good development prospect. It provides abundant renewable natural resources for Chongqing tourism, balneotherapy industry, aquaculture industry and other economic development.