Terrestrial heat flow and crustal thermal structure of the Gonghe-Guide area, northeastern Qinghai-Tibetan plateau

doi:10.1016/j.geothennics.2017.11.011

	Terrestrial heat flow and crustal thermal structure of the Gonghe-Guide area, northeastern Qinghai-Tibetan plateau
	Zhang, Chao 1,2; Jiang, Guangzheng 1,2; Shi, Yizuo 1,2; Wang, Zhuting 1,2; Wang, Yi 1,2; Li, Shengtao 3; Jia, Xiaofeng 3; Hu, Shengbiao 1
刊名	GEOTHERMICS
	2018-03-01
卷号	72 页码:182-192
关键词	Heat flow Thermal conductivity Radiogenic heat production Crustal thermal structure Magma chamber Gonghe-Guide area
ISSN号	0375-6505
DOI	10.1016/j.geothennics.2017.11.011
文献子类	Article
英文摘要	The Gonghe-Guide area, which is located at the northeastern edge of the Qinghai-Tibetan Plateau, has the greatest hot dry rock (HDR) geothermal resources exploration and development potential in China. Separated by the Waligong tectonomagmatic belt, the study area includes the Gonghe and Guide basins, which are characterized by distinctly different thermal state and surface thermal manifestations. Although a number of geophysical explorations have been undertaken, studies on fundamental geothermal theory remain scarce, including a lack of high-quality heat flow determinations and thermal structure studies. In this study, we obtained continuous steady-state temperature logs from three deep boreholes (GR2 and DR3 in the Gonghe basin and ZR1 in the Guide basin). The thermal conductivities and radiogenic heat production rates of the outcrop samples gathered from the two basins were measured. The heat-flow values were determined to be 116.3-122.3 mW m(-2) for the Gonghe basin, yielding a mean of 119.3 mW m(-2). Two existed heat flow sites (GR2 and R3 boreholes) gave an average heat flow of 75 mW m(-2) for the Guide basin, which is approximately that of the regional background heat flow level of the northeastern Tibetan Plateau. The 1-D theoretical crustal thermal structures of the Gonghe and Guide basins were constructed by solving steady-state heat conduction equation. The results show that the Moho temperature and mantle heat flow in the Guide basin were 1016 and 27 mW m(-2), respectively. However, the temperature field in the Gonghe basin indicated partial melting in the crust. The high temperatures and thus heat flow in the Gonghe basin may suggest the existence of anomalous heat source body in crust. Successful inversions of vertical and horizontal temperature variations of boreholes in the Gonghe basin were obtained by numerically simulating a cooling rectangular magma chamber with a buried depth of 5-6 km and horizontal dimensions of 12-14 km. The study emphasizes that the anomalous heat flow in the Gonghe basin may be the joint thermal effect of: (1) the high regional background heat flow level of the northeastern Tibetan Plateau, which is mainly due to the radiogenic heat of thickened crust; (2) the cooling of a shallow magma chamber, which may be caused by the uplift and denudation of the plateau.
WOS关键词	CONDUCTIVITY ; TEMPERATURE ; CALDERA ; BASIN ; KTB ; LITHOSPHERE ; GENERATION ; MEXICO ; CHINA ; ROCKS
WOS研究方向	Energy & Fuels ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000424719700016
资助机构	Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704) ; Center for Hydrogeology and Environmental Geology, China Geological Survey(DJS-16-0704)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82924]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, Chao
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100101, Peoples R China 3.China Geol Survery, Ctr Hydrogeol & Environm Geol, Baoding 071051, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Chao,Jiang, Guangzheng,Shi, Yizuo,et al. Terrestrial heat flow and crustal thermal structure of the Gonghe-Guide area, northeastern Qinghai-Tibetan plateau[J]. GEOTHERMICS,2018,72:182-192.
APA	Zhang, Chao.,Jiang, Guangzheng.,Shi, Yizuo.,Wang, Zhuting.,Wang, Yi.,...&Hu, Shengbiao.(2018).Terrestrial heat flow and crustal thermal structure of the Gonghe-Guide area, northeastern Qinghai-Tibetan plateau.GEOTHERMICS,72,182-192.
MLA	Zhang, Chao,et al."Terrestrial heat flow and crustal thermal structure of the Gonghe-Guide area, northeastern Qinghai-Tibetan plateau".GEOTHERMICS 72(2018):182-192.