气候变化领域集成服务门户(CCPortal): 3D gravity and magnetic inversion reveal geothermal structure dominated by radioactive heat production of granites in the Weihe basin

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DOI	10.1016/j.tecto.2024.230237
	3D gravity and magnetic inversion reveal geothermal structure dominated by radioactive heat production of granites in the Weihe basin
	Feng, Xuliang; Ma, Jiayue; Guo, Ruikun; Zhang, Jinai; Yang, Liu
发表日期	2024
ISSN	0040-1951
EISSN	1879-3266
起始页码	874
卷号	874
英文摘要	The Weihe basin possesses abundant in medium -low temperature geothermal resources. However, the primary source of heat in the basin, whether it stems from the mantle or crust, remains a subject of debate. In this study, we employ three-dimensional inversion of gravity and magnetic anomalies to ascertain the basement depth, Moho depth, Curie point depth, and spatial distribution of magnetic bodies within the Weihe basin. Our findings reveal that there is no correlation between heat flow and mantle uplift and the uplift area of the Moho does not coincide with the depocenter of the basin. These results suggest that the mantle heat brought by lithosphere thinning and stretching is not the predominant heat source in the Weihe basin. Furthermore, we observe a significant discrepancy in Curie point depth between the northern and southern sides of the Weihe fault within this region, indicating its role as a suture zone connecting two structural units throughout geological history. Through three-dimensional susceptibility inversion analysis, we identify a widespread distribution of magnetic bodies (primarily Yanshanian granites) beneath sediments within the Weihe basin which are connected to the granites located in the North Qinling area. This suggests that the granites formation within the Weihe basin may have occurred concurrently with the magmatic activity in the North Qinling area. Since Cenozoic timescale, northeastward compression exerted by the Tibet Plateau has resulted in passive strong fault depression within the Weihe basin while burying the previously intruded granites under thick sedimentary layers on a massive scale. These buried granites release heat through radioactive decay processes making them an essential heat source for the medium -low temperature geothermal fields.
英文关键词	Geothermal resources; Gravity anomaly; Magnetic anomaly; 3D inversion; Weihe basin
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001186934200001
来源期刊	TECTONOPHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303625
作者单位	Xi'an Shiyou University; Xi'an Shiyou University
推荐引用方式 GB/T 7714	Feng, Xuliang,Ma, Jiayue,Guo, Ruikun,et al. 3D gravity and magnetic inversion reveal geothermal structure dominated by radioactive heat production of granites in the Weihe basin[J],2024,874.
APA	Feng, Xuliang,Ma, Jiayue,Guo, Ruikun,Zhang, Jinai,&Yang, Liu.(2024).3D gravity and magnetic inversion reveal geothermal structure dominated by radioactive heat production of granites in the Weihe basin.TECTONOPHYSICS,874.
MLA	Feng, Xuliang,et al."3D gravity and magnetic inversion reveal geothermal structure dominated by radioactive heat production of granites in the Weihe basin".TECTONOPHYSICS 874(2024).