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地下热水的水文地球化学特征研究有利于地下热水的开发,对重庆三叠系碳酸盐岩热储热水的研究可以更好地实现重庆地下热水的可持续开发。通过2009年1月和2009年7月对重庆市三叠系碳酸盐岩热储热水进行野外监测、取样和室内分析,发现重庆三叠系碳酸盐岩热储热水水化学性质相近,pH呈中性,水温30℃~50℃,电导率为1 320μs/cm~3 250μs/cm,水化学类型为SO4-Ca(Mg)型,是典型的碳酸盐岩热储中-低温地下热水。温泉水的主要阳离子为Ca2+和Mg2+,阴离子为SO42-和HCO3-,除青木关温泉外,SO42-和Ca2+、Mg2+随时空变化较小,体现了碳酸盐岩中石膏与地下热水的水-岩作用对地下热水水文地球化学特征的控制。热水中的方解石和白云石都处于饱和与不饱和的临界状态,没有明显钙华沉积的现象;Na-K-Mg-Ca图解显示各个季节地下热水的物质来源基本一致,均没有达到水岩平衡状态。
The study of hydrogeochemical characteristics of underground hot water is beneficial to the development of underground hot water. The study on the hot reservoir water of Triassic carbonate reservoir in Chongqing can better realize the sustainable development of underground hot water in Chongqing. Through the field monitoring, sampling and indoor analysis of the Triassic carbonate thermal storage water in Chongqing in January 2009 and July 2009, the hydrochemical properties of the thermal storage water of the Triassic carbonate reservoir in Chongqing are similar , the pH is neutral, the water temperature is between 30 ℃ and 50 ℃, the conductivity is 1 320μs / cm ~ 3 250μs / cm, and the water chemistry type is SO4-Ca (Mg) Underground hot water. The main cations of hot spring water are Ca2 + and Mg2 +, and the anions are SO42- and HCO3-. Except for Qingmuguan Hot Spring, SO42- and Ca2 +, Mg2 + show little change with time and space, which shows that the water of gypsum and underground hot water HYDROGEOCHEMICAL CHARACTERISTICS CONTROL OF GROUND WATER. The calcite and dolomite in hot water are in a critical state of saturation and unsaturation with no obvious deposition of travertine. The Na-K-Mg-Ca diagram shows that the sources of groundwater in all seasons are basically the same, all of which do not reach the water Rock balance.