长白山玄武岩区盆地型地热水特征及成因模式
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本文为吉林省地勘基金资助项目(编号:地勘201413),中国博士后科学基金资助项目(编号:200529),河北省自然科学基金资助项目(编号:2018M631874),河北地质大学博士科研启动基金资助项目(编号:BQ2017011),河北省教育厅自然青年基金资助项目(编号:QN2017026),河北省水利科技计划(编号:201759)的成果。


Characteristics and Genetic Model of the Basin Type Geothermal Water Recourses in Basalt Area of Changbai Mountain
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    摘要:

    利用长白山玄武岩区地热井水化学、同位素数据以及地球物理勘探和地热井钻探资料,对研究区盆地型地热水资源特征及成因模式进行了研究。研究结果表明:研究区盆地型地热水属于低温地热水,漫江地热井和松江河地热井水温分别为31.2℃和29.5℃,化学组分阳离子以Na+为主,依次为Ca2+,阴离子以HCO-3和Cl-为主,水化学类型为HCO3·Cl—Na·Ca;微量组分偏硅酸含量最大,其次为锶和硼酸盐。氚年龄均大于60a;漫江地热井热储层温度平均值为101.91℃,松江河地热井热储层温度平均值为99.71℃;漫江地热井热储循环深度为3.23km,松江河地热井热储循环深度为316km;地热成因模式为:热源为上地幔传导热;盖层为下更新统军舰山组(Qp1j)、中生代侏罗系果松组(J2-3g)、林子头组(J3l)和三叠系长白组(T3c),厚度约2300m;热储层为古生界奥陶系马家沟组(O1m)、冶里组(O1y),亮甲山组(O1l),张夏组(2z)和古元古界老岭群珍珠门组(Pt1z),厚度在400m以上;地热水接受大气降水和少量封存水补给,经深部循环(3.15~3.30km),受大地热流传导热的加热,在浅部发生冷热水的混合,沿断裂通道向上运移。

    Abstract:

    Objectives: Changbai Mountain basalt area is a tectonically and volcanically active area. This region is rich in geothermal water that are different temperature, type and causes. Nowadays, most of the geothermal water are still not developed, and there are many information about the geothermal water is not clear, especially the cause of the basin type geothermal water resources. Therefore, in order to develop, use and protect geothermal water resources, we focus on the characteristics and genetic model of the basin type geothermal water recourses.Methods: Songjianghe and Manjiang geothermal wells were sampled. All samples to be analysed for pH, temperature, EC, major anions (such as carbonate, bicarbonate, chloride and sulphate), cations (such as calcium, magnesium and sodium), metallic elements (such as iron, copper, cadmium and mercury),trace elements (such as silicate, strontium and lithium) were collected in separate polyethylene bottles and hydrogen and oxygen isotope.The pH and EC were measured in situ using a lowrange pH/EC tester. Temperature was measured in situ by thermometer. Majorcations, anions, metallic and trace constituents were determined using the standard analysis methods. The bicarbonate concentration was determined using titration against hydrochloric acid. Sulphate and nitrate concentrations were determined using a spectrophotometer (V1300). Silicate was determined using potassium fluorosilicate. The chloride ion was estimated by titration against a standard solution of AgNO3. Sodium, potassium, calcium and magnesium were determined by flame atomic absorption spectrophotometer (AA6300). Other metallic and trace elements were also determined by flame atomic absorption spectrophotometer (AA6300). δD and δ18O were determined by IRMGC/MS (Agilent 5973). Geophysical method is magnetotelluric (MT) method. Two prospecting lines were placed in Songjianghe basin with the total long of 80 km. And Songjianghe and Manjiang geothermal wells were drilled by geothermal well drilling to get formation lithology and ground temperature data.

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闫佰忠,肖长来,梁秀娟,江海洋.2018.长白山玄武岩区盆地型地热水特征及成因模式[J].地质论评,64(5):1201-1216,[DOI].
YAN Baizhong, XIAO Changlai, LIANG Xiujuan, JIANG Haiyang.2018. Characteristics and Genetic Model of the Basin Type Geothermal Water Recourses in Basalt Area of Changbai Mountain[J]. Geological Review,64(5):1201-1216.

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  • 收稿日期:2017-10-17
  • 最后修改日期:2018-05-05
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  • 在线发布日期: 2018-09-14
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