威海市温泉汤温泉形成模式

Formation Mode of Wenquantang Hot Spring in Weihai City

摘要:

温泉汤温泉是威海地区一个非常重要的温泉，综合地球化学和地质调查方法，分析温泉汤温泉的形成模式。本文采集温泉汤温泉水样进行了水化学和氢氧稳定同位素测试，通过分析温泉水的水质类型、补给来源，估计水循环深度，结合地热地质条件进一步丰富了地热成因机制。水化学Piper分析图表明温泉水属于NaCl型温泉，水岩作用分析表明温泉水具有浅层水的特征，而氢氧稳定同位素值分布于中国东部大气降水线附近，推测温泉水主要受大气降水、地表水、地下水等浅层水的影响。根据δ2H同位素高程效应,计算得到温泉的补给高程为225~265m之间,根据周边地形地貌特征，南部山区约为240m左右，确定南部山区是主要的补给源。综合分析认为，大气降水从温泉汤温泉南部山区汇聚到盆地中，大气降水、地表水、地下水等通过断裂破碎带在深部进行热交换形成温泉热水，然后运移到地表，出露成温泉汤温泉。通过成因模式分析，为温泉汤温泉的资源评价和开发利用提供科学依据，也为威海地区其他温泉的研究和开发利用提供参考。

Abstract:

Wenquantang hot spring is one of the most important hot spring in Weihai city. Combining with geochemical and geological survey methods, the forming model of Wenquantang hot spring has been analyzed. In this paper, hydrochemistry test and hydrogen and oxygen isotopes test have been carried out by collecting hot spring water samples. Through analyzing water quality type and recharge source of hot spring water, water cycle depth has been estimated, and combining with geothermal geological conditions, the geothermal genetic mechanism has been further enriched. As showed by Piper diagram of water chemistry, the hot spring water belongs to NaCl type. As showed by water rock interaction analysis, hot spring water has the characteristics of shallow water, and the stable isotope values of hydrogen and oxygen are distributed near the atmospheric precipitation line in eastern China. It is speculated that the hot spring water is mainly affected by shallow water, such as atmospheric precipitation, surface water and groundwater. According to the elevation effect of 2H isotope, the recharge elevation of the hot spring is calculated to be 225~265m. According to landform characteristics of the surrounding area, the mountain in the south is about 240m, so it is determined that the mountain in the south is the main supply source. It is regarded that the atmospheric precipitation converges into the basin from the mountain in the south of Wenquantang hot spring. The atmospheric precipitation, surface water and groundwater exchange heat in the deep through the fault fracture zone to form hot spring water, then migrate to the surface to form hot spring. Through analysis of genetic model, it will provide scientific basis for the evaluation and development of hot spring resources, and some references for the research and development of other hot springs in Weihai area.