综合物探方法在内蒙古敖汉旗林家地地热资源勘查中的应用试验

doi:10.11720/wtyht.2024.1315

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Abstract

In the context of the goals of both peak carbon dioxide emissions and carbon neutrality, scientific and efficient exploration and exploitation of geothermal resources are criticalfor the geothermal industry. To address the commonly concernedtechnical challenges in the exploration of moderately deep geothermal resources, this study investigated the effectiveness of comprehensive geophysical prospecting in the exploration of geothermal resources inthe Linjiadi area, Aohan Banner, Inner Mongolia. Based on the analysis ofthe geological and hydrogeological conditions, this studypreliminarilyascertainedthe geothermal field characteristicsand the hydrochemicalcharacteristics of groundwater in the Linjiadi area. By comprehensively employingcontrolled source audio-frequency magnetotellurics (CSAMT), CSAMT; microtremor survey; radioactive radon survey; this study roughly determined the distribution of strata, magmatic rocks, and fault structures in the study area, inferring the factors controllinggeothermal anomaly areas and hot-water migration.Accordingly, exploration boreholes were arranged, allowing for drilling verificationwith a total length of 960 m. The results show that the comprehensiveapplication of CSAMT and microtremor survey, combined with radioactive radon survey for auxiliary verification, is effective in exploringmoderately deep geothermal resources. This study will provide a methodological reference for geothermal resource exploration in other areas.

Key words： CSAMT microtremor survey radioactive radon survey geothermal resource moderately deep geothermal resources northern margin of the North China block

Received: 25 July 2023 Published: 19 September 2024

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	Articles by authors
	Shu-He HAN
	Qiu-Ming PEI
	Jian XU
	Zhi-Yong SONG
	Hai-Bin MO

Cite this article:

Shu-He HAN,Qiu-Ming PEI,Jian XU, et al. Application of comprehensive geophysical prospecting in the exploration of geothermal resources in the Linjiadi area, Aohan Banner, Inner Mongolia[J]. Geophysical and Geochemical Exploration, 2024, 48(4): 962-970.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1315 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I4/962

Regional geological sketch of Linjiadi area, Aohan Banner

水样编号	取样位置	F^-/ (mg·L^-1)	H₂SiO₃/ (mg·L^-1)	Na⁺/ (mg·L^-1)	$S O 4 2 -$ / (mg·L^-1)
SH3	德力胡同	0.51	19.2	11.16	54.56
SH7	老阳坡	0.42	18.91	10.40	36.86
SH8	汤西沟	0.45	20.37	11.32	48.66
SH9	变电所	1.85	39.57	66.60	122.39
SH10	黑火药库	0.38	19.79	10.11	36.86
SH11	汤北沟	0.27	18.91	11.12	53.09
SH12	热水汤	0.51	18.04	14.79	92.90
SH13	庙房身	0.60	19.20	12.29	60.46
SH14	车杖子	0.64	20.96	9.13	33.93
SH15	小梁前	0.45	16.89	8.55	36.88
SH16	韩家沟	0.36	24.46	8.52	30.98
SH17	彭家沟	0.38	19.22	9.59	41.31
SH18	大西沟	0.31	25.04	8.03	44.26
SH21	热水汤	0.73	19.78	15.62	66.83
SH22	林家地	2.01	36.17	28.42	41.28

Water quality analysis results of geothermal specific components

Inversion resistivity inference of L5

Micro-motion inversion section diagram

Radon gas comprehensive profile of L5

The comparison results of integrated geophysical exploration methods

Stratigraphic structure of ZK1

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