Application of a comprehensive geophysical exploration methods to water exploration in magmatic rock mountainous areas with water shortage in Jiaodong Peninsula
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摘要: 岩浆岩地区富水性整体较弱,地下水匮乏,找水难度较大,资源型缺水是区内普遍存在的问题。本文针对不同找水目标类型,结合勘探靶区地质、物性特征、水文地质条件及现场踏勘,应用视电阻率联合剖面和视电阻率垂向测深综合物探手段解释分析,对莱阳市小水岔村和瓦屋村周边的地层电性结构特征、成井模式及富水机理进行了综合研究。通过确定找水目标、物探解释分析、综合分析定井,最终在两个村庄成功实施两眼钻孔,最大涌水量分别高达247.56 m3/d和620.64 m3/d,并结合侵入—接触带型和岩脉导水型蓄水构造模式详细分析了其富水机理,不仅解决了当地群众用水难题,也对今后在类似地区找水定井有一定的借鉴意义。Abstract: Magmatic rock areas suffer poor water yield property and lack groundwater overall, encounter great difficulties with water exploration, and generally face the problem that available water resources fail to meet the demand. Targeting different types of water exploration targets and combining the geological and physical property characteristics, hydrogeological conditions, and field survey of the exploration target areas, this study comprehensively analyzed the electric structure characteristics, well completion modes, and water yield mechanisms of the strata around Xiaoshuicha and Wawu villages in Laiyang City through interpretation and analysis using comprehensive geophysical exploration method consisting of apparent resistivity profiles and apparent resistivity-based vertical sounding. After determining water exploration targets, conducting interpretation and analysis of geophysical prospecting, and locating wells through comprehensive analysis, this study successfully drilled two wells in the two villages, obtaining maximum water yield of 247.56 m3/d and 620.64 m3/d each. Finally, this study analyzed the water yield mechanisms in detail based on the intrusion-contact zone types and water-storage structural models with dykes conducting water. This study not only solves the difficulty with water use of local people but also provides a certain reference for future water exploration and well locating in similar areas.
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Key words:
- magmatic rock /
- water exploration and well locating /
- survey /
- geophysical exploration
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