云南省镇沅县秀山村地热水特征与成因

Characteristics and Causes of Geothermal Water in Xiushan Village,Zhenyuan County,Yunnan Province

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(γ_(5)^(1))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SiO_(2)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。

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(γ_(5)^(1)),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 com⁃municate 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 SiO_(2) 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.