贵州区域地热成因探讨

doi:10.11720/wtyht.2022.1228

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Abstract

Regarding the genesis of the geothermal resources in Guizhou Province, most researchers tend to think that the geothermal resources were formed from the temperature rise induced by the mechanical energy of the “geothermal gradient” controlled by seismic activities and faults and that the geothermal resources do not possess from magma heat sources nor have the conditions of radioactive heat generation. Based on the research on the previous achievements, the characteristics of geothermal reservoirs and cap rocks, and regional gravity and magnetic data, the inference of the deep faults and intermediate-acid and basic-ultrabasic rock masses, and the analysis of regional distribution characteristics of natural geothermal resources and geothermal wells, this study proposes two possible basic genetic models of the geothermal resources in Guizhou. One is that automatic temperature rise and cyclic heat generation caused by the “geothermal gradient” controlled by deep faults. The groundwater with continuous temperature rise driven by this model is the most developed. The other genesis is the waste heat of magmatic rocks. It is inferred as a new type of heat generation and genesis supplement. As an important regional metallogenic region of uranium and thorium in China, Guizhou Province has only been researched at a low level and on a small scale, with a small amount of available data. Therefore, it is not clear whether there are basic conditions of radioactive heat generation in Guizhou Province. The in-depth study on the genesis of geothermal resources can provide relevant bases for the accurate surveys of geothermal resources and the expansion of prospecting direction in Guizhou Province in the future.

Key words： geothermal resources cap rock deep fault active fault genesis Guizhou

Received: 26 April 2021 Published: 28 June 2022

ZTFLH:	P314.1
	P314.2
	P314.3

Corresponding Authors: ZHANG Jia-Wei E-mail: wangliang62@163.com;25304799@qq.com

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	Liang WANG
	Cong-Liang HU
	Jia-Wei ZHANG
	Guo-Yong CHEN
	Mei-Xue ZHANG
	Wu YANG
	Ying-Wen ZHANG

Cite this article:

Liang WANG,Cong-Liang HU,Jia-Wei ZHANG, et al. Exploration of the genesis of regional geothermal resources in Guizhou Province[J]. Geophysical and Geochemical Exploration, 2022, 46(2): 304-315.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1228 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I2/304

9]
1—layered fractures compound geothermal reservoir;2—banded fractures geothermal reservoir;3—layered karst thermal reservoir;4—others to be determined;5—major faults;6—hot spring at 25~40℃;7—hot spring at 40~60℃;8—hot spring at 60~90℃;9—geothermal well at 25~40℃;10—geothermal well at 40~60℃;11—geothermal well at 60~90℃;12—geothermal well at 90~150℃
">

Distribution of geothermal resources in Guizhou^[9]
1—layered fractures compound geothermal reservoir;2—banded fractures geothermal reservoir;3—layered karst thermal reservoir;4—others to be determined;5—major faults;6—hot spring at 25~40℃;7—hot spring at 40~60℃;8—hot spring at 60~90℃;9—geothermal well at 25~40℃;10—geothermal well at 40~60℃;11—geothermal well at 60~90℃;12—geothermal well at 90~150℃

2,10]
1—natural geotherm spot;2—geothermal well;3—inferred deep first gradeⅠfault;4—inferred deep first grade Ⅱ fault;5—active fault;6—the geothermal area characterized as group of zonation
">

Correlation diagram of active faults and geothermal distribution in Guizhou^[2,10]
1—natural geotherm spot;2—geothermal well;3—inferred deep first gradeⅠfault;4—inferred deep first grade Ⅱ fault;5—active fault;6—the geothermal area characterized as group of zonation

24]
">

Temperature measurement curve and comprehensive anomaly map of a section of SZK1 geothermal well in northern suburb of Zunyi, Guizhou^[24]

u [ 2,1315 ]
1—inferred granite body;2—inferred granite batholith;3—natural geotherm spot;4—geothermal well;5—the geothermal area characterized as group of zonation;6—inferred deep first gradeⅠfault;7—inferred deep first gradeⅡfault
">

Correlation diagram among inferred granite, granite batholith and geothermal distribution in Guizho $u [2,1315]$
1—inferred granite body;2—inferred granite batholith;3—natural geotherm spot;4—geothermal well;5—the geothermal area characterized as group of zonation;6—inferred deep first gradeⅠfault;7—inferred deep first gradeⅡfault

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