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引用本文:付光明,黄进调,刘阳,李晓兵,陈国玉,黄艺. 高密度电阻率法与CSAMT法在江西会昌县坝背地热勘查中的综合探测[J]. 中国地质, 2019, 46(4): 927-936.
FU Guangming,HUANG Jintiao,LIU Yang,LI Xiaobing,CHEN Guoyu,HUANG Yi. Multi-electrode resistivity method and CSAMT method in geothermal exploration of Babei area in Huichang County, Jiangxi Province[J]. Geology in China, 2019, 46(4): 927-936(in Chinese with English abstract).
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高密度电阻率法与CSAMT法在江西会昌县坝背地热勘查中的综合探测
付光明1,2,3, 黄进调4, 刘阳4, 李晓兵4, 陈国玉4, 黄艺4
1.东华理工大学地球物理与测控技术学院, 江西 南昌 330013;2.中国地质科学院, 北京 100037;3.中国地质调查局-中国地质科学院地球深部探测中心, 北京 100037;4.江西省煤田地质局普查综合大队, 江西 南昌 330001
摘要:
地热资源是一种绿色低碳、极具竞争力的可再生能源。江西省会昌县坝背地区断裂构造密集,地热异常广泛发育。为了查明勘查区各断裂构造的产状、规模及深部变化特征,为寻找地热水钻孔布置提供依据,项目组首先在已知温泉位置布置3条高密度试验测线,接着在已知温泉位置以南布置4条高密度测线,然后在高密度电阻率法资料初步解释成果的基础上再施工可控源音频大地电磁测深法(CSAMT),得出其中两条深大断裂是温泉主要的导水导热构造、断裂深切至基底界面、基底界面起伏明显的结论。同时圈定了4个低阻异常区,其中低阻异常范围最大的区域长约1000 m,宽约240 m,高约200 m,是含水最为有利区域,亦是寻找地热水的直接依据,建议在其正上方布设钻孔进行验证,孔深约800 m,满足深大断裂和基底对低阻区的深度控制。
关键词:  坝背  地热水  高密度电阻率法  可控源音频大地电磁测深
DOI:10.12029/gc20190421
分类号:P622+.2;P314.1
基金项目:中国地质调查局项目(DD20160082)、国家自然科学基金项目(41574133)、国家重点研发计划(2016YFC0600201)、中国地质科学院基本科研业务费专项经费(YYWF201526)、江西省国土资源厅地质勘查基金项目(20163002)联合资助。
Multi-electrode resistivity method and CSAMT method in geothermal exploration of Babei area in Huichang County, Jiangxi Province
FU Guangming1,2,3, HUANG Jintiao4, LIU Yang4, LI Xiaobing4, CHEN Guoyu4, HUANG Yi4
1.School of Geophysics and Measurement-control Technology, East China Institute of Technology, Nanchang, 330013, Jiangxi, China;2.Chinese Academy of Geological Sciences, Beijing, 100037, China;3.China Deep Exploration Center, China Geological Survey & Chinese Academy of Geological Sciences, Beijing, 100037, China;4.Jiangxi Coal Geology Bureau Comprehensive Survey Party, Nanchang 330001, Jiangxi, China
Abstract:
Geothermal resources are a kind of green, low carbon and highly competitive renewable energy. The Babei area of Huichang County in Jiangxi Province is characterized by dense faults. In order to find out the characteristics of the attitude, scale and deep change of the fault structure in the exploration area so as to provide a basis for finding the layout of geothermal water drilling, the authors arranged three multi-electrode resistivity method test lines at the location of the known hot springs, and determined the validity of the geophysical method and the water guide fault in the survey area according to the principle of the shallow to deep exploration from the known to the unknown. On the basis of the preliminary interpretation results of multielectrode resistivity method, the controllable source audio magnetotelluric sounding method (CSAMT) was constructed according to the preliminary interpretation of multi-electrode resistivity method. It is concluded that two of the deep faults are the main thermal conductive structures in hot springs, that the faults cut deeply into the basement interface, and that the basement interface undulates obviously. At the same time, four low resistivity anomalous zones were delineated, of which the largest one is about 1000m in length, 240m in width and 200 m in height. It is the most advantageous water-bearing area and the direct basis in the search for geothermal water. It is suggested that drilling holes should be laid directly above the anomalous zones for verification. The hole depth is about 800m, which meets the depth control of deep and large faults and the base for low resistivity zones.
Key words:  Babei  geothermal  multi-electrode resistivity method  CSAMT