赣南地区含氮温泉水文地球化学特征研究

发布时间：2018-03-22 00:35

  本文选题：温泉　切入点：同位素　出处：《东华理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：中国是世界上地热资源非常丰富的国家之一,广泛分布着高温、中低温地热。相较于高温地热资源而言,中低温地热资源有着分布范围更广、区域面积更大,开发利用条件较高的特点。随着近些年我国经济的发展,传统能源的日趋短缺导致对清洁能源的需求量日益迫切,因而中低温地热资源的开发和利用受到了愈来愈多的关注。而开展中低温地热资源中地下热水组分含量和分布特点以及演化特征和热水围岩之间的相互作用等基础性研究,对中低温地热系统的成因和地热资源的开发利用具有重要的指导作用。本文对赣南地区氮气型温泉水化学组分和氢氧同位素特征进行了分析,简要探讨了温泉水化学组分特征,计算了温泉的补给高程,海拔范围在840m-1100m之间。着重研究了氮气型温泉的较高pH值和硫酸盐、碳酸盐之间的复杂关系,并使用水文地球化学模拟软件PHREEQC2.15及数据库wateq4f.dat计算了热水中部分次生矿物饱和指数,探究了氮气型温泉与次生矿物组分(如碳酸盐,氟化物等)之间的平衡状态。初步探讨了温泉热水系统中存在强烈而持续的水-岩相互作用,但地下热水TDS仍较低的原因,即地下热水系统保持着‘沉淀-溶解’的相对动态平衡。计算并估算了温泉的热储温度。结果表明,氮气型温泉热储温度范围为80℃—120℃,温泉具有较大的热储深度,范围在2800m-4400m之间。最后,以研究区内水温最高的汝城热水温泉为典型特例,从“点”的角度初步探讨了赣南地区温泉成因模式。为江西省赣南地区含氮温泉和地热资源的未来规划和利用提供参考依据。
[Abstract]:China is one of the countries with abundant geothermal resources in the world. It is widely distributed with high temperature and moderate and low temperature geothermal resources. Compared with high temperature geothermal resources, medium and low temperature geothermal resources have a wider distribution range and larger regional area. With the development of our economy in recent years, the shortage of traditional energy sources leads to the increasingly urgent demand for clean energy. Therefore, more and more attention has been paid to the exploitation and utilization of medium-low temperature geothermal resources. In this paper, the chemical composition and hydrogen oxygen isotope characteristics of nitrogen type hot spring water in south Jiangxi are analyzed, and the chemical composition characteristics of hot spring water are discussed briefly. The recharge elevation of the hot spring is calculated, and the elevation range is between 840m-1100m. The complex relationship between the higher pH value of the nitrogen hot spring and the sulfate and carbonate is studied. The saturation index of some secondary minerals in hot water is calculated by using hydrogeochemical simulation software PHREEQC2.15 and database wateq4f.dat, and the composition of nitrogen type hot springs and secondary minerals (such as carbonate) is explored. The reason why there is strong and continuous water-rock interaction in hot spring hot water system is discussed, but the TDS of underground hot water is still low. The thermal storage temperature of hot spring is calculated and estimated. The results show that the thermal storage temperature of nitrogen type hot spring is between 80 鈩，

本文编号：1646300