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A study of chemical characteristics and water-rock interaction of karstic geothermal reservoir in Wuhan city circle |
Jun-Qiang NIU1, Wei FAN1, Kun GUO1,2 |
1. Geological Environmental Center of Hubei Province,Wuhan 430034,China 2. China University of Geosciences,School of Environmental Studies,Wuhan 430074,China |
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Abstract Based on the geothermal water hydrochemical data of karst geothermal fields of Wuhan urban agglomeration, the authors summarized the hydrochemical type of karst hot mineral water, analyzed the variation characteristics of main components of karst hot mineral water with temperature, studied the relationship between the degree and time of water-rock action, and analyzed the hydrochemical processes of the main ions in hot water. The results show that the content of main components in hot water is controlled by temperature and water-rock interaction process, the total dissolved solids content increases with the increase of water-rock action time. As the total dissolved solids content increases, the water-rock interaction was gradually transformed from carbonate dissolution to sulfate dissolution, at high total dissolved solids, the dissolution of salt rocks is enhanced. the Langkou geothermal field, the Wuhongshan geothermal field and the Shewushan geothermal field belong to the same water flow system, the Tangchi geothermal field and the Makou geothermal well belong to the same water flow system, and other geothermal fields belong to separated water flow systems.
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Received: 02 November 2018
Published: 15 August 2019
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序号 | 地热田 | 补给区 | 相对补给区位置 | 水温/℃ | 热储岩性 | 水质资料/份 | 1 | 咸宁市温泉 | 大幕山区 | 北西9 km | 51 | 奥陶系硅化灰岩 | 79 | 2 | 嘉鱼蛇屋山 | 大幕山区 | 北西50 km | 57 | 奥陶系白云质灰岩 | 5 | 3 | 赤壁五洪山 | 大幕山区 | 北西40 km | 57 | 奥陶系中统硅化灰岩 | 8 | 4 | 黄石市胡家湾煤矿 | 黄荆山 | 北西1.5 km | 35 | 三叠—石炭系灰岩、炭质灰岩 | 1 | 5 | 大冶章山 | | | 37 | 寒武系白云岩、白云质灰岩 | 2 | 6 | 应城汤池 | 大洪山区 | 南东20 km | 55 | 震旦系白云岩、硅质白云岩 | 2 | 7 | 洪湖乌林 | 大药姑山区 | 北西40 km | 60 | 二叠系白云质灰岩 | 10 | 8 | 崇阳浪口 | 大幕山区 | 西15 km | 47 | 寒武系硅化白云岩 | 14 | 9 | 武汉三门湖 | 青龙山 | 南西2 km | 27 | 石炭—二叠系的碳酸盐岩 | 1 | 10 | 通山西坑 | 大幕山区 | 南西0.5 km | 27 | 寒武系和奥陶系灰岩 | 2 | 11 | 汉川马口地热井 | 大洪山区 | 南东70 km | 52 | 寒武—奥陶系碳酸盐岩 | 2 | 12 | 天门张港地热井 | 大洪山区 | 南西40 km | 65 | 震旦—寒武系碳酸盐岩 | 1 | 13 | 武汉武5井 | 封存水 | | 37.5 | 寒武—奥陶系碳酸盐岩 | 1 |
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The basic situation of karst thermal reservoir geothermal fields in Wuhan City Circle
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The piper trilinear diagram of karst hot water and cold spring water(the legends in the following figures are the same as this one)
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The relationship between main components of karst hot water and temperature
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Na-K-Mg equilibrium
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The relationship between 14C apparent age and TDS
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The relationship between main components of karst hot water and TDS
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Comparison of HCO3-, Ca2+ and Mg2+ concentrations in karst hot water
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Comparison of Ca2+ and Mg2+ concentrations in karst hot water
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O42- and Ca2+ concentrations in karst hot water ">
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Comparison of S and Ca2+ concentrations in karst hot water
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Comparison of Cl- and Na+ concentrations in karst hot water
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Comparison of Sr2+ and Ca2+ concentrations in karst hot water
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O3- concentrations in karst hot water ">
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Comparison of F- and HC concentrations in karst hot water
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