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现代地质 ›› 2007, Vol. 21 ›› Issue (1): 163-169.

• 环境工程 • 上一篇    下一篇

青海西宁城南新区杜家庄地热田地下水的地球化学特征

张森琦1,李惠娣2,许国成3,石维栋1,周金元1,尚小刚1   

  1. 1青海省地质调查院,青海  西宁810012;2中国地质科学院 地质力学研究所,北京100081;
    3青海省西宁市城南新区管理委员会,青海  西宁810000
  • 收稿日期:2006-03-16 修回日期:2006-10-25 出版日期:2007-01-20 发布日期:2007-01-20
  • 作者简介:张森琦,男,高级工程师,1962年出生,水文地质、工程地质、环境地质专业,主要从事水文地质、工程地质、环境地质的应用研究工作。Email:qhsddy@126.com。
  • 基金资助:

    青海省国土资源厅科技项目(2004-69)

Geochemical Characteristics of Groundwater in the Dujiazhuang Geothermal Field in the South of Xining,Qinghai

ZHANG Sen-qi1,LI Hui-di2,XU Guo-cheng3,SHI Wei-dong1,ZHOU Jin-yuan1,SHANG Xiao-gang1   

  1. 1Geological Survey of Qinghai, Xining, Qinghai810012, China;2Institute of Geomechanics, Chinese Academy of Geological Sciences,
    Beijing100081, China;3South Xining New District Administrative Committee,Xining,Qinghai810000, China
  • Received:2006-03-16 Revised:2006-10-25 Online:2007-01-20 Published:2007-01-20

摘要:

依据青海省西宁市城南新区杜家庄地热田DR2005地热井地下热水的水化学资料,采用兰格利厄—路德维金图解法、同位素水文学方法、地球化学温标法等,对杜家庄地热田地下热水的补给机制、地下热水年龄、地热资源潜力等关键问题进行分析。分析结果表明杜家庄地热田地下热水源于大气降水入渗补给,但仍有现代冷水补给,地热田下部还存在着远高于DR2005地热井开采段温度的热储。依据研究区地热地质条件具可比性的地热生产井水化学动态观测资料推断,随着DR2005地热井开采时间的延续,地下热水水质将向淡化的方向发展。研究结果为杜家庄地热田的开发利用提供水文地球化学依据。

关键词: 杜家庄地热田, 地热资源, 水化学特征, 青海西宁

Abstract:

According to the chemical composition of thermal water from well DR2005 located at the Dujiazhuang geothermal field in the south of Xining,Qinghai, the groundwater recharge, age and geothermal resource potential of the thermal water are discussed by the use of Langelier-Ludwig diagram, isotopic hydrology and geothermometer methods. These results show that geothermal water from Dujiazhuang geothermal field is meteoric origin, and has modern water recharge. Based on geothermometer, the temperature of Dujiazhuang geothermal field is far higher than that of well DR2005. Hydrochemical variation of the thermal water at the area with the same geological structure suggests that the water has a trend towards bicarbonate water. The above results provide the hydrogeochemical evidence for geothermal field exploitation of Dujiazhuang.

Key words: Dujiazhuang geothermal field, geothermal resource, hydrochemical characteristic, Xining, Qinghai

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