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Research on the characteristics and influencing factors of terrestrial heat flow in Guizhou Province

Journal of Groundwater Science and Engineering 2022年第2期10卷 166-183页

作者： Shuai-chao Wei Feng Liu Wei Zhang Gui-ling Wang Ruo-xi Yuan Yu-zhong Liao Xiao-xue Yan Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Technology Innovation Center of Geothermal&Hot Dry Rock Exploration and Development Ministry of Natural ResourcesShijiazhuang 050061China China University of Geosciences(Beijing) Beijing 100083China

terrestrial heat flow is an important physical parameter in the study of heat transfer and thermal structure of the earth and it has great significance in the genesis and development and utilization potential of regional geothermal *** several breakthroughs in geothermal exploration have been made in Guizhou *** terrestrial heat flow in this area has not been properly measured,restricting the development of geothermal resources in the *** this reason,the terrestrial heat flow in Guizhou was measured in this study,during which the characteristics of heat flow were determined using borehole thermometry,geothermal monitoring and thermal property ***,the influencing factors of the terrestrial heat flow were *** results show that the thermal conductivity of rocks ranges from 2.0W/(m·K)to 5.0 W/(m·K),with an average of 3.399 W/(m·K);the heat flow varies from 30.27 mW/m^(2) to 157.55 mW/m^(2),with an average of 65.26±20.93 mW/m^(2),which is slightly higher than that of the average heat flow in entire land area in *** heat flow in Guizhou generally follows a dumbbell-shaped distribution,with high values present in the east and west and low values occurring in the north and *** terrestrial heat flow is related to the burial depths of the Moho and Curie *** basaltic eruptions in the Emeishan led to a thinner lithosphere,thicker crust and lateral emplacement,which dominated the basic pattern of heat flow distribution in *** addition,the dichotomous structure of regional active faults and concealed deep faults jointly control the heat transfer channels and thus influence the terrestrial heat flow.

关键词： Thermal conductivity terrestrial heat flow Moho Curie surface Emeishan basaltic

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Quantitative Expression of heat flow versus Tectonic Deformation in the China Continent: The Effects of Plastic-flow Network and Stable Block

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Acta Geologica Sinica(English Edition) 2006年第1期80卷 97-109页

作者： WANG Sheng-zu Institute of Geology and State Key Laboratory of Earthquake Dynamics China Earthquake Administration Beijing 100029

Based on the heat flow data published in 1990 and 2001, a study of the factors influencing the terrestrial heat flow distribution in the China continent and its quantitative expression is carried out using the ＂Netlike Plastic-flow＂ continental dynamics model and the methods of statistic analysis and optimum fitting. The result indicates that the factors influencing the heat flow distribution is classified into two groups, i.e. background and tectonic ones, in which the former mainly involves the non- uniform distribution of mantle heat flow, heat production of radioactive dements in the crust, heattransfer media and hydrothermal circulation, while the latter mainly involves plastic-flow networks and relatively-stable blocks. The plastic-flow network is a manifestation of shear localization in the netlike plastic-flow process in the lower lithosphere, which is composed of two sets of plastic-flow belts （PFBs） intersecting each other and, as one of the basic action regimes, controls the intraplate tectonic deformation. Relatively stable blocks （RSBs）, which are the tectonic units with relatively-high viscosities existing in the netlike plastic-flow field, as one of the principal origins, result in the development of large-seale compressional basins. PFB and RSB, as the active and quiet states of tectonic deformation, give rise to the higher and lower heat flow values, respectivdy. The provincial average heat flow in continent can be estimated using the expression qav = q0 ＋ a Pbt-c Pbk, where the three terms of the right side are background heat flow, PFB-positive contribution and RSB-negative contribution, Pbt and Pbk are the PFB- and RSB-coverage ratios, respectively, a is the coefficient of PFB- positive contribution depending mainly on the strain in the lower lithosphere, and c is the coefficient of RSB-negative contribution related mainly to the thickness of the lithosphere, the aseismic-area ratio and the tectonic age. For the major portion of the China contine

关键词： continental lithosphere terrestrial heat flow plastic-flow network relatively stable block,heat-flow expression

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Geothermal anomalies in the Xianshuihe area: Implications for tunnel construction along the Sichuan-Tibet Railway, China

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Journal of Groundwater Science and Engineering 2023年第3期11卷 237-248页

作者： Feng Liu Wei Zhang Gui-ling Wang Shuai-chao Wei Chen Yue Guang-zheng Jiang Yu-zhong Liao Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological ScienceShijiazhuang 050061China China University of Geosciences(Beijing) Beijing 100083China Technology Innovation Center of Geothermal&Hot Dry Rock Exploration and Development Ministry of Natural ResourcesShijiazhuang 050061China Chengdu University of Technology Chengdu 610059China

This study presents a comprehensively analysis of geothermal characteristics in the Xianshuihe geothermal area along the Sichuan-Tibet Railway,using temperature logging,temperature monitoring and thermal conductivity measurement,and regional geothermal geological survey *** research focuses on the geothermal background,geothermal field,and their potential impact on the surrounding *** investigation reveals that the average heat flow value in the study area is approximately 73.0 mW/m^(2),significantly higher than the average terrestrial heat flow in China's Mainland(62.5 mW/m^(2)).This high terrestrial heat flow signifies a distinct thermal background in the *** addition,geothermal anomalies in the area are found to be closely associated with the distribution of hot springs along NW faults,indicating a strong control by the Xianshuihe fault *** study concludes that the region's favorable conditions for geothermal resources are attributed to the combination of high terrestrial heatflow background and water-conducting ***,these conditions also pose a potential threat of heat damage to the tunnels along the Sichuan-Tibet *** evaluate the risk,the research takes into account the terrestrial heat flow,thermal conductivity of the tunnel surrounding rocks,characteristics of the regional constant temperature layer,as well as the distribution of hot springs and *** analysis specifically focuses on the thermal damage risk of Kangding 1# tunnel and 2# tunnel passing through the study *** on the findings,it is determined that Kangding 1# tunnel and 2# tunnel have relatively low risk of heat damage,as they have avoided most of the high temperature anomaly ***,several sections of the tunnels do traverse zones with low to medium temperatures,where surface rock temperatures can reach up to 45℃.Therefore,these regions should not be neglected during the construction and operation of the tunnel project,and mitigation measu

关键词： Xianshuihe geothermal zone terrestrial heat flow Hot spring Tunnel heat damage

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A research on the geothermal structure in Yanqing-Huailai Basin and its neighbouring region

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Acta Seismologica Sinica(English Edition) 1997年第4期10卷 115-118页

作者：祖金华吴乾蕃廉雨方

ＡｒｅｓｅａｒｃｈｏｎｔｈｅｇｅｏｔｈｅｒｍａｌｓｔｒｕｃｔｕｒｅｉｎＹａｎｑｉｎｇ┐ＨｕａｉｌａｉＢａｓｉｎａｎｄｉｔｓｎｅｉｇｈｂｏｕｒｉｎｇｒｅｇｉｏｎＪＩＮ－ＨＵＡＺＵ（祖金华）ＱＩＡＮ－ＦＡＮＷＵ（吴乾蕃... 详细信息

ＡｒｅｓｅａｒｃｈｏｎｔｈｅｇｅｏｔｈｅｒｍａｌｓｔｒｕｃｔｕｒｅｉｎＹａｎｑｉｎｇ┐ＨｕａｉｌａｉＢａｓｉｎａｎｄｉｔｓｎｅｉｇｈｂｏｕｒｉｎｇｒｅｇｉｏｎＪＩＮ－ＨＵＡＺＵ（祖金华）ＱＩＡＮ－ＦＡＮＷＵ（吴乾蕃）ＹＵ－ＦＡＮＧＬＩＡＮ（廉雨方）...

关键词： terrestrial heat flow two dimensional temperature structure Yanqing Huailai Basin and its neighbouring regions

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Relationship between crustal magnetic anomalies and strong earthquake activity in the south segment of the China North-South Seismic Belt

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Applied Geophysics 2021年第3期18卷 408-419,434页

作者： Wen Li-Min Kang Guo-Fa Bai Chun-Hua Gao Guo-Ming Department of Geophysics Yunnan UniversityKunming 650091China

The south segment of the China North-South Seismic Belt is located in the southeast margin of the Qinghai Tibet *** region is characterized by the frequent seismic activity in Chinese *** this paper,the geomagnetic field model NGDC-720 and the data of terrestrial heat flow are used to investigate the distribution of crustal magnetic anomalies,the depth of Curie surface,and the characteristics of the crustal thermal structure in the south segment of the North-South Seismic *** distribution characteristics of the vertical component AZ and the magnetic declination AD in the area with earthquakes over a magnitude of 6 and their aftershocks since 1970 are focused *** results show that the earthquakes are mainly observed in the area of negative magnetic anomaly or the strong and weak transition *** especially shows in the *** Curie surface in the study area varies significantly,ranging from 20.8 to 31 *** uplift area of the Curie surface is consistent with the high-value area of terrestrial heat *** high geothermal area corresponds to the strong earthquake activity *** focal depth of most strong earthquakes is shallower than the depth of the Curie *** strong earthquakes mainly occur in the deep-shallow transition zones of the Curie *** results can be used as a reference for strong earthquake prediction in this area.

关键词： crustal magnetic anomalies Curie point depth terrestrial heat flow strong earthquake activity North-South Seismic Belt

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