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云南省镇沅县秀山村地热水特征与成因

2021-08-26徐剑波李仕斌

河南科技 2021年9期

徐剑波 李仕斌

摘 要:秀山温泉位于澜沧江褶断带与子马-景谷复向斜交接部位的澜沧江热水带中,出露于北西向与北东向两组断裂之间,并且与印支期花岗岩体([γ51])相关联,是多重作用下的产物。热源主要为下伏岩体余热释放,其次是派生断裂沟通了它们之间的联系,加强了热对流。温泉有多种有益元素存在,属中温砷+偏硅酸温矿(泉)水、锂+锶天然矿泉水。用无蒸气损失的SiO2温标估算的热储温度为122.8 ℃,估算的温泉水循环深度为2.26 km。区内具有进一步寻找中、高温热水资源的可能。

关键词:温泉;澜沧江;断裂

中图分类号:P314.1文献标识码:A文章编号:1003-5168(2021)09-0141-03

Abstract: Xiushan Hot Spring is located in the Lancang River hot water zone at the junction of the Lancang River fold fault zone and the Zima-Jinggu complex syncline, which is exposed between two sets of NW-trending and NE-trending faults, and is associated with the Indosinian granite body ([γ51]), which is the product of multiple actions. The main heat source is the release of residual heat from the underlying rock mass, followed by derivative faults that communicate the connection between them and strengthen heat convection. There are a variety of beneficial elements in the hot springs, including medium-temperature arsenic + metasilicate warm mineral (spring) water, and lithium + strontium natural mineral water. The thermal storage temperature estimated with the SiO2 temperature scale without vapor loss is 122.8 ℃, and the estimated hot spring water circulation depth is 2.26 km. The zone has the possibility of further searching for medium and high temperature hot water resources.

Keywords: hot spring;Lancang River;fault

地热资源是集热、水、矿于一体的综合性矿产资源。地热资源的开发利用对节约能源、保护环境、提高居民生活质量和医疗保健水平有着重大的作用。

秀山温泉位于滇西褶皱区超岩石圈的澜沧江深大断裂、澜沧江地热带内,区内地质构造极为复杂,岩浆活动强烈,活跃的地壳运动为本区高温地热水的形成提供了良好的地质背景[1]。由于位置偏隅,交通不便,秀山温泉一直未得到开发利用。随着国家整体乡村扶贫攻坚战的深入与建设美丽新农村的战略构建,新近开通的墨(江)临(沧)高速公路从秀山村近傍通过,为加速当地热水资源开发、助力农村经济的快速发展提供了机遇[2]。

1 区域地质背景

研究区处于澜沧江褶断带与兰坪-思茅上叠坳陷交接处。澜沧江深大断裂从北往南呈S形-反S形弯曲,总体近南北向延伸,兩端被北西、北东后期断裂所切。……

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