滇东南弥勒盆地蓄水构造特征分析及找水方向

Analysis of the Characteristics of Groundwater Storage Structure and Groundwater Exploration in Mile Basin,Southeast Yunnan Province

蓄水构造是富集地下水的地质构造形式,它是地下水形成、运动和蓄存的场所。在干旱地区寻找地下水主要是寻找有利的蓄水构造。通过分析弥勒盆地及其周边蓄水构造的特征,能为今后弥勒地区干旱年份寻找地下水提供水文地质依据。该文在对区域地质条件、地下水系统资料进行详尽分析并结合野外现场调查的基础上,基于蓄水构造的三要素,对滇东南弥勒盆地蓄水构造类型及其特征进行了分析,认为区内主要有汇水型蓄水构造、阻水型蓄水构造和风化带型蓄水构造三类,在干旱年份岩性分界面阻水型蓄水构造、断裂型蓄水构造和风化带型蓄水构造中的地下水具有供水意义。

Geological structure is important for controlling the formation,movement and accumulation of groundwater.Analysis of water storage structure is an useful method for groundwater exploration in arid area.Analyzing characteristics of water storage structure in Mile basin and its peripheral area can provide hydrogeological basis for groundwater exploration of Mile in future drought year.Base on the regional geological conditions,groundwater system data were analyzed in detailed,and this paper analyzed the type and characteristics of water storage structure in Mile basin according to the field survey and the critically examination of the three elements of water storage structure.According to the geological analysis,the main water storage structure types were catchment,water resisting structure and weathered zone in Mile basin,suggesting that the main direction of groundwater exploration in drought year was to find the water in the lithologic boundary as water resisting structure,as well as in fault and weathered zone.