摘要
东莞塘厦大钟岭地热系统的形成受NWW向断裂所控制,属隐伏对流型地热系统。该断裂是一条长寿断裂,形成于早白垩世中期—古新世,力学性质为压性,始新世—渐新世出现张性改造,新近纪—早更新世为压扭性改造;中更新世以来是该断裂最后一次构造运动,在NW—SE向压应力场的作用下,断裂出现张扭性改造,所形成的构造岩未完全胶结,从而成为地下水深循环的通道,该次构造运动是地热系统形成的决定性因素。
The formation of the Dazhongling geothermal system in Tangxia,Dongguan is controlled by the NWW-trending fault,which is a hidden convective geothermal system.The fault is a long-lived fault,formed in the mid-Early Cretaceous-Paleocene,the mechanical properties are compressive,the Eocene-Oligocene has a tensile transformation,and the Neogene-Early Pleistocene is a compressive torsional transformation;since the Middle Pleistocene,it was the last tectonic movement of the fault,under the action of the NW-SE compressive stress field,the fracture appears tensile and torsional transformation,the formed tectonic rock is not completely cemented,thus becoming a channel for deep circulation of groundwater,this tectonic movement is the decisive factor in the formation of the geothermal system.
作者
邓高
陈胜男
DENG Gao;CHEN Shengnan(Guangdong Geology Technology Engineering Consultant Corporation,Guangzhou 510080,China)
出处
《中国资源综合利用》
2021年第10期39-43,共5页
China Resources Comprehensive Utilization
关键词
地热系统
控热构造
构造演化
东莞市
geothermal system
thermal control structure
tectonic evolution
Dongguan City
