Terrestrial heat flow and geothermal genesis mechanism of geothermal resources in northern Ningdu County, Jiangxi Province

LIU Feng; WANG Guiling; ZHANG Wei; YUE Chen; GAN Haonan; XIAO Zeyou; OU Xiaoke

2020 Vol. 39, No. 12

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LIU Feng, WANG Guiling, ZHANG Wei, YUE Chen, GAN Haonan, XIAO Zeyou, OU Xiaoke. Terrestrial heat flow and geothermal genesis mechanism of geothermal resources in northern Ningdu County, Jiangxi Province[J]. Geological Bulletin of China, 2020, 39(12): 1883-1890.

Citation:

LIU Feng, WANG Guiling, ZHANG Wei, YUE Chen, GAN Haonan, XIAO Zeyou, OU Xiaoke. Terrestrial heat flow and geothermal genesis mechanism of geothermal resources in northern Ningdu County, Jiangxi Province[J]. Geological Bulletin of China, 2020, 39(12): 1883-1890.

Terrestrial heat flow and geothermal genesis mechanism of geothermal resources in northern Ningdu County, Jiangxi Province

1.
Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, Hebei, China
2.
China University of Geosciences(Beijing), Beijing 100083, China
3.
Technological Innovation Center of Geothermal&Hot Dry Rock Exploration and Development, MNR, Shijiazhuang 050061, Hebei, China
4.
South Jiangxi Geological SurveyingParty, Jiangxi Bureau of Exploration and Development of Geology and Minerals, Ganzhou 341000, Jiangxi, China
5.
Shenzhen Municipal Design and Research Institute Co., Ltd., Shenzhen 518000, Guangdong, China

More Information

Corresponding author: WANG Guiling, guilingw@163.com

Received Date: 10 July 2020

Revised Date: 21 September 2020

Publish Date: 25 December 2020

Abstract

Abstract

The northern area of Ningdu Country is rich in geothermal resources; nevertheless, the blank research on terrestrial heat flow and geothermal mineralization background restricts the exploitation and utilization of geothermal resources seriously.Based on previous research and geological survey, the authors analyzed the terrestrial heat flow and geothermal genesis mechanism of the study area.The conclusions are as follows:firstly, based on well temperature measurement and thermal conductivity data, the authors detected that the average terrestrial heat flow is 93.6 mW/m² in this region, which is far higher than the average terrestrial heat flow 62.5 mW/m² in China's continental regions.This area has a relatively strong strength of geothermal background.Secondly, the average radiation heat generation rate of the exposed granite and migmatite in this area is 6.47 W/m³, suggesting a highly radioactive rock mass.The radioactive decay heat generation of the rock is an important reason for high terrestrial heat flow in this area.Besides heating from mantle source, shell source heat generation is added to provide a stable heat source.On the other hand, two deep faults and their secondary faults across this region has provided heat transfer and water flowing channels for deep circulation of hot groundwater.Therefore, it is inferred that the formation mechanism of geothermal resources in the research area could be described as the "high heat flow background + rocks with high heat production +multi-level thermal control and water conducted faults ".This study provides guidance for geothermal prospecting in Gannan area.
- Gannan area /
- terrestrial heat flows /
- high-yielding thermal granite /
- geothermal genesis model

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