对廖家湾地球物理异常的新认识
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摘要
为查明黄沙坪-廖家湾矿集区深部地球物理异常与成矿的关系,以及地下精细结构,本文采用人工地震、AMT、高精度磁测、综合物性研究等探测技术,结合该区的地质资料和前人的物性成果,通过磁、电、震联合反演,探讨了廖家湾成矿地球物理异常的深部地质成因;采用深、浅不同深度的地震反演速度剖面所提供的相对精细、精确的地下介质几何结构与速度变化特征,约束磁性与电性异常的解释,获得了较好的磁-震、电-震的一致性.研究表明:高磁性的矽卡岩与地面和航空磁异常密切相关,成矿地球物理异常与区内多金属矿(化)关系密切,是由深部隐伏钨锡矿(化)矽卡岩体引起.
In order to identify the deep elaborate structure and explore the relation-ship between geophysical anomalies and mineralization in Liaojiawan deposits,a comprehensive exploration was employed,including seismic,AMT,high-precision magnetic survey and physical rock measurement.Under the help of history geological information,the deep geologic origin of Liaojiawan geophysical anomalies was analyzed by means of geophysical joint inversion.Controlled by regional geology,a relatively reasonable interpretation of magnetic and electromagnetic data was deduced at the basis of seismic velocity inversion,since more deep and accurate information can be provided by seismic exploration.The case study of Liaojiawan showed that Liao's geophysical anomalies are closely related to poly-metallic ore deposit,and may be caused by the deep and hidden skarn ores containing tungsten tin.Especially,there is a good relation-ship between the high magnetic subsurface skarn body with the air or surface magnetic anomaly.
In order to identify the deep elaborate structure and explore the relation-ship between geophysical anomalies and mineralization in Liaojiawan deposits,a comprehensive exploration was employed,including seismic,AMT,high-precision magnetic survey and physical rock measurement.Under the help of history geological information,the deep geologic origin of Liaojiawan geophysical anomalies was analyzed by means of geophysical joint inversion.Controlled by regional geology,a relatively reasonable interpretation of magnetic and electromagnetic data was deduced at the basis of seismic velocity inversion,since more deep and accurate information can be provided by seismic exploration.The case study of Liaojiawan showed that Liao's geophysical anomalies are closely related to poly-metallic ore deposit,and may be caused by the deep and hidden skarn ores containing tungsten tin.Especially,there is a good relation-ship between the high magnetic subsurface skarn body with the air or surface magnetic anomaly.
引文
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[2]李晓敏,胡瑞忠,毕献武,等.湘南骑田岭花岗岩岩体地球化学特征及锡成矿潜力[J].吉林大学学报(地球科学版),2010,40(1):80-93.Li X M,Hu R Z,Bi X W,et al.Geochemistry and Tinmetallogenic Potential for Qitianling granite mass in SouthernHuman[J].Journal of Jilin University(Earth Science Edition)(in Chinese),2010,40(1):80-93.
[3]朱金初,王汝成,张佩华,等.南岭中段骑田岭花岗岩基的锆石U-Pb年代学格架[J].中国科学(D辑:地球科学),2009,39(8):1112-1117.Zhu J C,Wang R C,Zhang P H,et al.Zircon U-Pbgeochronological framework of Qitianling granite batholiths,middle part of Nanling Range,South China[J].Sci.ChinaSer.D-Earth Sci.,2009,52(9):1279-1294.
[4]藤吉文.强化第二深度空间金属矿产资源探查,加速发展地球物理勘探新技术与仪器设备的研制及产业化[J].地球物理学进展,2010,25(3):729-748.Teng J W.Strengthening exploration of metallic minerals inthe second depth space of the crust,accelerating developmentand industralization of new geophysical technology andinstrumental equipment[J].Progress in Geophysics(inChinese),2010,25(3):729-748.
[5]陈召曦,孟小红,郭良辉.重磁数据三维物性反演方法进展[J].地球物理学进展,2012,27(2):503-511.Chen Z X,Meng X H,Guo L H.Review of 3D propertyinversion of gravity and magnetic data[J].Progress inGeophysics(in Chinese),2012,27(2):503-511.
[6]曹令敏.隐伏矿床定位预测理论和技术的研究现状及发展趋势[J].地球物理学进展,2010,25(3):1037-1045.Cao L M.The status and trends of researching on the theoryand technique of the location prediction for concealed orebody[J].Progress in Geophysics(in Chinese),2010,25(3):1037-1045.
[7]曹令敏.地球物理方法在金属矿深部找矿中的应用及展望[J].地球物理学进展,2011,26(2):701-708.Cao L M.The application and expectation of the geophysicalmethods to deep metal mine exploration[J].Progress inGeophysics(in Chinese),2011,26(2):701-708.
[8]滕吉文,杨立强,姚敬全,等.金属矿产资源的深部找矿、勘探与成矿的深层动力过程[J].地球物理学进展,2007,22(2):317-334.Teng J W,Yang L Q,Yao J Q,et al.Deep disscover ore,exploration and exploitation for metal mineral resocrces and itsdeep dynamical process of formation[J].Progress inGeophysics(in Chinese),2007,22(2):317-334.
[9]曹一中,邓河华,桂阳幅.1:200000区域重力航磁成果报告[R].湖南:湖南省地矿局物探队,1990.Cao Y Z,Deng H H.1:200000 regional gravity andaeromagnetic report at Guiyang in Hunan Province(inChinese)[R].Hunan:Department of ExplorationGeophysics,Bureau of Geology and Mineral Exploration andDevelopment of Hunan Province,1990.
[10]覃永炎,周金华,黄经明,等.芙蓉锡矿田地球物理地球化学特征及找矿意义[J].华南地质与矿产,2007,(2):71-76.Qin Y Y,Zhou J H,Huang J M,et al.Characteristics andprospecting geophysical and geochemical significance of theFurong Tin ore field[J].Geology and Mineral Resource ofSouth China(in Chinese),2007,(2):71-76.
[11]刘斌,周四春,葛良全,等.湘南千里山-骑田岭矿集区黄沙坪型铅锌矿地气异常特征及找矿意义[J].地球学报,2011,32(4):413-418.Liu B,Zhou S C,Ge L Q,et al.Geogas anomalycharacteristics of the Huangshaping lead-Zinc deposit in theQianlishan-qitianling ore concentration area and theirprospecting significance in the South Hunan[J].Chinese J.Geophys.(in Chinese),2011,32(4):413-418.
[12]郭佑民,赵鸿儒,邓国祥,等.研究岩矿综合物性测定的必要性和可能性的初步探讨[J].地球物理学进展,1989,4(1):17-20.Guo Y M,Zhao H R,Deng G X,et al.Preliminarydiscussion about the necessity and pontential ofcomprehensive measurement on physical properties of rockand mineral[J].Progress in Geophysics(in Chinese),1989,4(1):17-20.
[13]金振民.我国高温高压实验研究进展和展望[J].地球物理学报,1997,40(S1):70-81.Jin Z M.The progresses and perspectives of high-T and high-P experimental study in China[J].Chinese J.Geophys.(inChinese),1997,40(S1):70-81.
[14]叶益信,邓居智,李曼,等.电磁法在深部找矿中的应用现状及展望[J].地球物理学进展,2011,26(1):327-334.Ye Y X,Deng J Z,Li M,et al.Application status and vistasof electromagnetic methods to deep ore prospecting[J].Progress in Geophysics(in Chinese),2011,26(1):327-334.
[15]陈向斌,吕庆田,张昆.大地电磁测深反演方法现状与评述[J].地球物理学进展,2011,26(5):1607-1619.Chen X B,LüQ T,Zhang K.Review of magnetotelluric datainversion methods[J].Progress in Geophysics(in Chinese),2011,26(5):1607-1619.
[16]孙燕,刘建明,曾庆栋,等.综合地球物理方法在某金多金属矿区找矿中的应用[J].地球物理学进展,2010,25(6):2096-2101.Sun Y,Liu J M,Zeng Q D,et al.Application ofcomprehensive geophysical methods in ore prospecting in oneAu polymetallic mineralizing area[J].Progress in Geophysics(in Chinese),2010,25(6):2096-2101.
[17]庄锦良,王书风,林绍华,等.湘南地区锡铅锌隐伏矿床预测研究[M].北京:地质出版社,1993.Zhuang J L,Wang S F,Lin S H,et al.People’s Republic ofChina Ministry of Geology and Mineral Resources GeologicalMemoirs(in Chinese)[M].Beijing:Geological PublishingHouse,1993.
[18]邓碧海,韦循荣,刘启顺,等.宜章幅区域地质调查报告[R].长沙:湖南省地质矿产局,1991.Deng B H,Wei X R,Liu Q S,et al.Yongchun and Yizhangrejional geological survey report in Hunan province(inChinese)[R].Changsha:Bureau of Geology and MineralExploration and Development of Hunan Province,1991.
[19]赵振华,涂光炽.千里山-骑田岭岩(矿)带演化与钨、铋、锡超大型矿床[C].//中国超大型矿床II[M].北京:科学出版社.2003.Zhao Z H,Tu G C.The relations between Qianlishan-Qitianling rock(mineral)belts envolution and superlargedeposit of tungsten,bismuth,tin(in Chinese)[C].//Studies on Superlarge Ore Deposits of China II[M].Beijing:Science Press,2003.
[20]丁正兴,柏道远,马铁球,等.骑田岭岩体成岩与成矿关系研究[J].华南地质与矿产,2007,(3):1-5.Ding Z X,Bai D Y,Ma T Q,et al.Study on the relationshipbetween the rock-forming and ore-forming of Qitianlingpluton[J].Geology and Mineral Resources of South(inChinese),2007,(3):1-5.
[21]邓希光,李献华,刘义茂,等.骑田岭花岗岩体的地球化学特征及其对成矿的制约[J].岩石矿物学杂志,2005,24(2):93-102.Deng X G,Li X H,Liu Y M,et al.Geochemicalcharacteristics of Qitianling granites and their implications formineralization[J].Acta Petrologica et Mineralogic(inChinese),2005,24(2):93-102.
[22]李桃叶,刘家齐.湘南骑田岭芙蓉锡矿田流体包裹体特征和成分[J].华南地质与矿产,2005,(3):44-49.Li T Y,Liu J Q.Characteristics and composition of fluidinclusions in Furong tin orefield,Qitinling area,SouthHunan Province[J].Geology and Mineral Resources of SouthChiese(in Chinese),2005,(3):44-49.
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