| 滇西陇川断陷盆地地热水化学特征及循环过程 |
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| 引用本文： | 黄琴辉,张华,康晓波,王波,刘海峰,柴金龙,黄钊,王燕.滇西陇川断陷盆地地热水化学特征及循环过程[J].中国岩溶,2020,39(6):793-801. |
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| 作者姓名： | 黄琴辉 张华 康晓波 王波 刘海峰 柴金龙 黄钊 王燕 |
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| 作者单位： | 1.云南国土资源职业学院 |
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| 基金项目： | 云南省地质勘查基金项目(D201709) |
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| 摘 要： | 通过对陇川盆地开展地热地质调查，查清其地热资源分布:盆地内共出露地热点11处，热储结构类型为带状型和层状型，盆地中部为层状型，两侧盆地边缘为带状型，其中北西部受断裂控制明显，南东部受节理裂隙控制明显。其储热层为变质岩及新近系芒棒组的花岗质砂砾岩、细砂岩；地热水受大气降水影响明显，循环深度都在1 600 m以上，大部分在1 800~2 400 m之间，主要来源于深部热源，通过断裂、裂隙及砂砾石孔隙作为导水、储水上涌通道，接收来自山区补给的地下水混合出露于地表，补给距离在1.5 km以上，如南宛河温泉温度最高，地下水循环深度最深，补给距离最远，达10 km；盆地北东和西部水温高，循环深度深。
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| 关 键 词： | 滇西 陇川盆地 地热地质条件 化学特征 成因分析 |
Chemical characteristics and circulation process of geothermal water beneath Longchuan basin, western Yunnan |
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| HUANG Qinhui,ZHANG Hu,KANG Xiaobo,WANG Bo,LIU Haifeng,CHAI Jinlong,HUANG Zhao,WANG Yan.Chemical characteristics and circulation process of geothermal water beneath Longchuan basin, western Yunnan[J].Carsologica Sinica,2020,39(6):793-801. |
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| Authors: | HUANG Qinhui ZHANG Hu KANG Xiaobo WANG Bo LIU Haifeng CHAI Jinlong HUANG Zhao WANG Yan |
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| Institution: | 1.Yunnan Land and Resources Vocational College2.Yunnan Institute of Geological Environment Monitoring3.Yunnan Geological Survey4.Yunnan Institute of Geological Survey |
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| Abstract: | A survey of geothermic geology has been conducted to clarify the distribution of geothermal resources beneath the Longchuan basin. Results show that geothermal sources are exposed at 11 sites in this basin, in which heat reservoirs are zonal and layered type structures. Of them, the layered type appears in the central part of the basin, and the edges of each side of the basin are of zonal type. In the northwest of the basin, the heat reservoirs are obviously controlled by faults, while in the southeast joints and cracks have profound influence on the geothermal sources. The host rocks of these thermal reservoirs include metamorphic rocks, granitic glutenite and fine sandstone of Neogene Manban formation. Hydrochemical analysis suggests that geothermal water is obviously affected by atmospheric precipitation, and its circulation depth is above 1，600 m, mostly between 1，800 and 2，400 m, mainly from the surrounding mountains, with recharge distance over 1.5 km. The Nanwanhe hot spring has the highest temperature and the deepest groundwater circulation, with the longest recharge distance up to 10 km. Overall the water temperature is relatively high and water circulation is deep in the northeast and west of the basin. The heat of the geothermal water comes from the deep thermal source. It is a mixed type of geothermal water that receives groundwater recharge from mountainous areas and surface water through faults, fissures and sand and gravel pores as upwelling channels for water diversion and storage. |
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| Keywords: | western Yunnan Longchuan basin geological conditions of geotherm chemical characteristics genetic analysis |
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