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引用本文:刘健,史杰,姚鑫,李钦,常志勇. 帕米尔高原东北缘活动构造对塔什库尔干盆地地热控制作用[J]. 中国地质, 2018, 45(4): 681-692.
LIU Jian,SHI Jie,YAO Xin,Li Qin,CHANG Zhiyong. The control of neo-tectonic activity over geothermal resource in the Taxkorgan Basin on the northeastern margin of the Pamir[J]. Geology in China, 2018, 45(4): 681-692(in Chinese with English abstract).
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帕米尔高原东北缘活动构造对塔什库尔干盆地地热控制作用
刘健1, 史杰2, 姚鑫1, 李钦1, 常志勇2
1.中国地质科学院地质力学研究所, 北京 100081;2.新疆地质矿产局第二水文调查大队, 新疆 昌吉 831100
摘要:
帕米尔东北缘位于青藏高原西北部,是新构造运动最强烈的地区之一。受控于公格尔拉张断裂作用的塔什库尔干盆地,活动构造强烈,高的大地热流值和丰富的地下水,使其具备地热资源形成的地质构造和水文条件。基于塔什库尔干盆地北部的曲曼地区地质构造、湖相地层年代学调查研究,该地区发育晚更新世的NNE向f1和f2正断层以及第四纪沉积物之下存在隐伏的近EW向的断层f3。这3条断层是塔什库尔干断裂在不同构造演化时期形成的次级断层。结合EH-4电磁成像和钻孔及抽水试验等资料表明NNE向f1和f2正断层是地热系统的导水通道,而近EW向f3断层为导热通道。该地区地热模式是大地热流为热源-地下水深循环逐渐加热-构造控水和控热。
关键词:  帕米尔东北缘  塔什库尔干盆地  地热资源  导水通道
DOI:10.12029/gc20180403
分类号:P546;P314.1
基金项目:中国地质调查项目(12120114001401和DD20160060)资助。
The control of neo-tectonic activity over geothermal resource in the Taxkorgan Basin on the northeastern margin of the Pamir
LIU Jian1, SHI Jie2, YAO Xin1, Li Qin1, CHANG Zhiyong2
1.Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;2.No.2 Hydrogeological Investigation Party, Xinjiang Bureau of Geology and Mineral Resources, Changji 831100, Xinjiang, China
Abstract:
The northeastern Pamir on the northwest margin of the Tibetan Plateau is one of the regions with strong neotectonic movement. Located in the northeastern Pamir, the Taxkorgan basin is controlled by regional Kongur tensile faulting. The strong neotectonism, high terrestrial heat and abundant underground water of the basin constitute the regional tectonic and hydrogeological conditions for geothermal resources. Tectonic investigation in Quman area of northern Taxkorgan basin indicates the NNE-striking normal faults of f1 and f2 were active in late Quaternary whereas the subtle EW-striking fault of f3, whose nature was different in different structural stages, was developed only below the Quaternary sediments. These faults are the secondary fractures of Tashkorgan fault formed in different tectonic episodes. Based on the data of geological structure, age model of the section of the lacustrine deposits, EH-4 electromagnetic image and drilling, the authors hold that the NNE-striking normal faults were conduit-pipe and EW-striking thrust fault was heat conduction pathway. The atmospheric precipitation from the surrounding areas of the basin was heated by convection heating along the intersection of the different striking faults. The geothermal model involves heat source from terrestrial heat flow, gradually heating of deep circulated underground water and tectonic control of water and heat.
Key words:  northeastern Pamir  Taxkorgan basin  geothermal resources  tectonic control of underground water and heat