中国地质2025，Vol.52Issue(2)：399-415,17.DOI:10.12029/gc20240226001
青海共和盆地温度场特征、干热岩成因及资源潜力
Geothermal geological characteristics,genetic model and resource potential of hot dry rocks in the Gonghe Basin,Qinghai
摘要
Abstract
This paper is the result of geothermal geological survey engineering. [Objective]The Gonghe Basin,situated on the northeastern margin of the Qinghai-Tibet Plateau,is a significant experimental area for the exploration and development of hot dry rock(HDR)in China.The formation mechanisms of HDR within the Gonghe Basin remain controversial and have attracted considerable research attention.The current thermal state is of great significance for a deeper understanding the distribution patterns and formation mechanisms of high-temperature geothermal reservoirs.[Methods]In this study,extensive geophysical exploration and drilling data are integrated to describe the geological and geothermal architecture of the Gonghe Basin.A two-dimensional temperature field profile across the east-west axis is established through numerical simulation.Based on these results,the resource potential of HDR is assessed,and the key factors controlling HDR formation are analyzed.[Results]The Gonghe Basin hosts abundant HDR resources,with an estimated 2.48×1021 J within the depth of 5 km.The two-dimensional numerical simulation reveals significant temperature field variations between the eastern and western parts of the basin.The temperature field variations are consistent with the distribution of the basin's basement depth,which decreases from west to east.High-temperature anomalies are observed in the northeastern region,particularly around the Xinjie-Waliguan uplift belt.[Conclusions]On the basis of understanding the knowledge of predecessors,this paper proposes a comprehensive HDR formation mechanism from the perspectives of geological,geothermal,and geophysical backgrounds.The formation of HDR in the Gonghe Basin is controlled by multiple factors,including continuous heating by partial melting,heating and conducting heat by granite,heat controlling by neotectonic uplift and denudation,and heat preservation and accumulation by sedimentary covers.关键词
温度场/干热岩/成因模式/资源潜力评价/地热地质调查工程/共和盆地/青海省Key words
geothermal field/hot dry rock/formation mechanism/potential evaluation of HDR resources/geothermal geological survey engineering/Gonghe Basin/Qinghai Province分类
地球科学引用本文复制引用
张林友,邓志辉,李旭峰,朱贵麟,张盛生,张超,王璜,冯庆达,许文豪,牛兆轩..青海共和盆地温度场特征、干热岩成因及资源潜力[J].中国地质,2025,52(2):399-415,17.基金项目
国家自然科学青年科学基金项目(42202336)和中国地质调查局项目(DD20190131、DD20211336、DD20230018)联合资助. Supported by National Natural Science Foundation of China(No.42202336),the projects of China Geological Survey(No.DD20190131,No.DD20211336,No.DD20230018). （42202336）
