南岭于都——赣县矿集区银坑示范区重磁资料探测花岗岩分布研究
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摘要
银坑示范区位于中国东南部南岭东段于都—赣县矿集区内的银坑镇,具有良好的找矿前景。该区花岗岩与成矿关系密切。因此,系统探查花岗岩体分布是深部找矿的关键问题之一。笔者主要利用重力、磁力平面资料,并结合物性、地质、电法、地震等资料,综合研究了该区花岗岩空间分布特征。首先研究推断了该区6个花岗岩体的平面分布,其中,江背岩体、长潭岩体、高山角岩体为部分隐伏岩体;柳木坑岩体、葛凹圩浅部岩体和葛凹圩深部岩体为完全隐伏岩体。6个岩体总体走向为NE和NNE向。然后利用研究区内4条剖面重(磁)资料反演了花岗岩的空间分布,进一步揭示了上述6个岩体的空间分布特征,其推断成果与利用平面重、磁资料推断成果一致,也与电法、地震剖面解释结果一致。
Located in Yinkeng Town,Yududu-Ganxian ore concentration area,east Nanling Mountains,Southeast China,the Yinkeng Demonstration Area has a good prospect of mineralization,where the granite is closely related to mineralization. Therefore,systematic exploration of granite distribution is one of the key problems in deep prospecting. In this paper,the spatial distribution characteristics of regional granite were comprehensively studied by using gravity and magnetic data,combined with physical,geological,electrical and seismic data. Firstly,the planar distribution of six granite masses in this area was studied and deduced,among which Jiangbei rock mass,Changtan rock mass and Gaoshanjiao rock mass are partially concealed,whereas Liumukeng rock mass and the shallow and deep rock masses of Ge'aowei are completely concealed. It is concluded that the rock mass mainly trends in NE and NNE direction. Then,four gravity( or gravity and magnetic) profiles in the study area were used to invert the spatial distribution of granite,which further revealed the spatial distribution characteristics of the above six rock masses. The inferences are consistent with those obtained by plane gravity and magnetic method as well as the results derived from electrical method and seismic profile interpretation.
Located in Yinkeng Town,Yududu-Ganxian ore concentration area,east Nanling Mountains,Southeast China,the Yinkeng Demonstration Area has a good prospect of mineralization,where the granite is closely related to mineralization. Therefore,systematic exploration of granite distribution is one of the key problems in deep prospecting. In this paper,the spatial distribution characteristics of regional granite were comprehensively studied by using gravity and magnetic data,combined with physical,geological,electrical and seismic data. Firstly,the planar distribution of six granite masses in this area was studied and deduced,among which Jiangbei rock mass,Changtan rock mass and Gaoshanjiao rock mass are partially concealed,whereas Liumukeng rock mass and the shallow and deep rock masses of Ge'aowei are completely concealed. It is concluded that the rock mass mainly trends in NE and NNE direction. Then,four gravity( or gravity and magnetic) profiles in the study area were used to invert the spatial distribution of granite,which further revealed the spatial distribution characteristics of the above six rock masses. The inferences are consistent with those obtained by plane gravity and magnetic method as well as the results derived from electrical method and seismic profile interpretation.
引文
[1]陈毓川,裴荣富,张宏良.南岭地区与中生代花岗岩类有关的有色、稀有金属矿床地质[J].中国地质科学院院报,1990(1):79-85.Chen Y C,Pei R F,Zhang H L,et al. Geology of nonferrous and rare metal deposits related to mesozoic granitoids in the Nanling regions,China[J]. Bulletin of the Chinese Academy of Geological Sciences,1990(1):79-85.
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[4]舒良树,周新民,邓平,等.南岭构造带的基本地质特征[J].地质论评,2006(2):251-265.Shu L S,Zhou X M,Deng P,et al. Principal geological features of Nanling tectonic belt,South China[J]. Geological Review,2006(2):251-265.
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[7]饶家荣,金小燕,曾春芳.南岭中段北缘深部构造—岩浆(岩)控矿规律及找矿方向[J].国土资源导刊,2006(3):31-36.Rao J R,Jin X Y,Zeng C F. Ore-controlling regularity and prospecting direction of deep structure-magma(rock)in the northern margin of the middle Nanling Mountains[J]. Land&Resources Herald,2006(3):31-36.
[8]黄金明.重磁数据处理解释技术在华南地区岩体圈定与形态反演中的应用研究[D].北京:中国地质大学(北京),2013.Huang J M.The study of gravity and magnetic data processing and interpretation method on boundary delineation and shape inversion of rock body in South China[D].Beijing:China University of Geosciences(Beijing),2013.
[9]刘鹏飞,刘天佑,陈国雄.南岭花岗岩重力场特征与找矿意义[J].工程地球物理学报,2013,10(1):1-6.Liu P F,Liu T Y,Chen G X. Characteristics of Nanling granite gravity field and significance of prospecting[J].Chinese Journal of Engineering Geophysics,2013,10(1):1-6.
[10]孙劲松.南岭成矿带重磁场特征研究[D].武汉:中国地质大学(武汉),2013.Sun J S.Study on the characteristics of gravity and magnetic field in Nanling Metallogenic Belt[D].Wuhan:China University of Geosciences(Wuhan),2013.
[11]陈国雄,刘天佑,孙劲松,等.南岭成矿带多尺度重力场及深部构造特征[J].地球科学:中国地质大学学报,2014,39(2):240-250.Chen G X,Liu T Y,Sun J S,et al. Characteristics of multi-scale gravity field and deep structure in Nanling Metallogenic Belt[J].Earth Science:Journal of China University of Geosciences,2014,39(2):240-250.
[12]王万银,王云鹏,李建国,等.利用重、磁资料研究于都—赣县矿集区盘古山地区断裂构造及花岗岩体分布[J].物探与化探,2014,38(4):825-834.Wang W Y,Wang Y P,Li J G,et al. Study on the faults structure and granite body distribution in Pangushan area of Yudu-Ganxian ore district using gravity and magnetic data[J]. Geophysical and Geochemical Exploration,2014,38(4):825-834.
[13]刘金兰,赵斌,王万银,等.利用重磁资料研究南岭于都—赣县矿集区花岗岩与断裂分布特征[J].地质学报,2014,88(4):658-668.Liu J L,Zhao B,Wang W Y,et al.A study of the granite and faults distribution based on gravity and magnetic data obtained in YuduGanxian Ore Concentration Area of Nanling[J]. Acta Geologica Sinica,2014,88(4):658-668.
[14]冯兵,李建国,赵斌,等.音频大地电磁法在南岭于都—赣县矿集区银坑示范区深部矿产资源探测中的应用[J].地质学报,2014,88(4):669-675.Feng B,Li J G,Zhao B,et al.The application of audio magnetotelluric method(AMT)in Nanling Yudu-Gan County Ore-Concentrated Area Yinkeng Demonstration Plot to survey deep mineral resources[J].Acta Geologica Sinica,2014,88(4):669-675.
[15]魏祥荣.遥感在南岭带赣南段构造研究中的应用[J].华东铀矿地质,2001(1):21-30.Wei X R.Application of remote sensing in structural study of Southern Jiangxi Section of Nanling Zone[J].East China Uranium Geology,2001(1):21-30.
[16]姜枚,贾秀敏.南岭花岗岩岩石物理性质的研究[J].中国地质科学院矿床地质研究所所刊,1989(1):145-155.Jiang M,Jia X M.Physical properties of granite rocks in Nanling region[J].Bulletin of the Institite of Mineral Deposits Chinese Academy of Geological Sciences,1989(1):145-155.
[17]李建国,赵斌,孙少伟,等.南岭于都—赣县矿集区的综合物性特征[J].工程地球物理学报,2013,10(3):313-319.Li J G,Zhao B,Sun S W,et al.On comprehensive physical property of mineralization concentrated region in Yudu-Ganxian[J]. Chinese Journal of Engineering Geophysics,2013,10(3):313-319.
[18] Hood P,Mc Clure D J.Gradient measurements in ground magnetic prospecting[J].Geophysics,1965,30(3):403-410.
[19] Bhattacharyya B K.Two-dimensional harmonic analysis as a tool for magnetic interpretation[J].Geophysics,1965,30(5):829-857.
[20]钟清,孟小红,刘士毅.重力资料定位地质体边界问题的探讨[J].物探化探计算技术,2007,29(s):35-38.Zhong Q,Meng X H,Liu S Y.Discussion on the boundary problem of geological body location with gravity data[J]. Computing Techniques for Geophysical and Geochemical Exploration,2007,29(s):35-38.
[21] Cordell L. Gravimetric expression of graben faulting in SantaFe Country and the Espanola Basin[C]//Guidebook,30th Field Conf.,New Mexico:New Mexico Geol. Soc.,1979:59-64.
[22]余钦范,楼海.水平梯度法提取重磁源边界位置[J].物探化探计算技术,1994,16(4):363-367.Yu Q F,Lou H. Locating the boundaries of magnetic or gravity sources using horizontal gradient anomalies[J]. Computing Techniques for Geophysical and Geochemical Exploration,1994,16(4):363-367.
[23]周蒂,王万银,庞雄,等.地球物理资料所揭示的南海东北部中生代俯冲增生带[J].中国科学D辑:地球科学,2006,36(3):209-218.Zhou D,Wang W Y,Pang X,et al. Mesozoic subduction accretion zone in northeastern South China Sea revealed by geophysical data[J].Science in China Ser.D:Earth Sciences,2006,36(3):209-218.
[24] Wang W Y,Pan Y,Qiu Z Y. A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data[J].Applied Geophysics,2009,6(3):226-233.
[25]陈毓川,陈郑辉,曾载淋,等.南岭科学钻探第一孔选址研究[J].中国地质,2013,40(3):659-670.Chen Y C,Chen Z H,Zeng Z L,et al.Research on the site selection of Nanling Scientific Drilling-1[J]. Geology in China,2013,40(3):659-670.
[26]刘申叔,李上卿.东海油气地球物理勘探[M].北京:地质出版社,2001.Liu S S,Li S Q. Geophysical exploration of oil and gas in the East China Sea[M].Beijing:Geological Publishing House,2001.
[27]陈毓川.中国成矿体系与区域成矿评价[M].北京:地质出版社,2007.Chen Y C. Chinese mineralization system and assessment of regional mineralization[M]. Beijing:Geological Publishing Press,2007.
[28]邓晋福,赵国春,赵海玲,等.中国东部燕山期火山岩构造组合与造山—深部过程[J].地质评论,2000,46(1):41-48.Deng J F,Zhao G C,Zhao H L,et al. Yanshanian igneous petrotectonic assemblsge and orogenic-deep pressess in east China[J].Geological Review,46(1):41-48.
[2]王登红,陈振宇,黄凡,等.南岭岩浆岩成矿专属性及相关问题探讨[J].大地构造与成矿学,2014,38(2):230-238.Wang D H,Chen Z Y,Huang F,et al. Discussion on metallogenic specialization of the magmatic rocks and related issues in the nanling region[J]. Geotectonica et Metallogenia,2014,38(2):230-238.
[3]孙涛.新编华南花岗岩分布图及其说明[J].地质通报,2006(3):332-335,426-427.Sun T. A new map showing the distribution of granites in South China and its explanatory notes[J]. Geological Bulletin of China,2006(3):332-335,426-427.
[4]舒良树,周新民,邓平,等.南岭构造带的基本地质特征[J].地质论评,2006(2):251-265.Shu L S,Zhou X M,Deng P,et al. Principal geological features of Nanling tectonic belt,South China[J]. Geological Review,2006(2):251-265.
[5]秦葆瑚.南岭区域重磁异常的地质解释[J].湖南地质,1987(1):1-15.Qin B H. A geological interpretation on the regional gravity and magnetic anomalies in Nanling area[J]. Hunan Geology,1987(1):1-15.
[6]孙德梅,曾青石.华南花岗岩深部构造的地球物理场特征及其找矿意义[J].中国地质科学院矿床地质研究所所刊,1987(2):129-134.Sun D M,Zeng Q S.Deep structures of the granites and characteristics of the geophysical fields in south China and their significance in ore prospecting[J]. Bulletin of the Institite of Mineral Deposits Chinese Academy of Geological Sciences,1987(2):129-134.
[7]饶家荣,金小燕,曾春芳.南岭中段北缘深部构造—岩浆(岩)控矿规律及找矿方向[J].国土资源导刊,2006(3):31-36.Rao J R,Jin X Y,Zeng C F. Ore-controlling regularity and prospecting direction of deep structure-magma(rock)in the northern margin of the middle Nanling Mountains[J]. Land&Resources Herald,2006(3):31-36.
[8]黄金明.重磁数据处理解释技术在华南地区岩体圈定与形态反演中的应用研究[D].北京:中国地质大学(北京),2013.Huang J M.The study of gravity and magnetic data processing and interpretation method on boundary delineation and shape inversion of rock body in South China[D].Beijing:China University of Geosciences(Beijing),2013.
[9]刘鹏飞,刘天佑,陈国雄.南岭花岗岩重力场特征与找矿意义[J].工程地球物理学报,2013,10(1):1-6.Liu P F,Liu T Y,Chen G X. Characteristics of Nanling granite gravity field and significance of prospecting[J].Chinese Journal of Engineering Geophysics,2013,10(1):1-6.
[10]孙劲松.南岭成矿带重磁场特征研究[D].武汉:中国地质大学(武汉),2013.Sun J S.Study on the characteristics of gravity and magnetic field in Nanling Metallogenic Belt[D].Wuhan:China University of Geosciences(Wuhan),2013.
[11]陈国雄,刘天佑,孙劲松,等.南岭成矿带多尺度重力场及深部构造特征[J].地球科学:中国地质大学学报,2014,39(2):240-250.Chen G X,Liu T Y,Sun J S,et al. Characteristics of multi-scale gravity field and deep structure in Nanling Metallogenic Belt[J].Earth Science:Journal of China University of Geosciences,2014,39(2):240-250.
[12]王万银,王云鹏,李建国,等.利用重、磁资料研究于都—赣县矿集区盘古山地区断裂构造及花岗岩体分布[J].物探与化探,2014,38(4):825-834.Wang W Y,Wang Y P,Li J G,et al. Study on the faults structure and granite body distribution in Pangushan area of Yudu-Ganxian ore district using gravity and magnetic data[J]. Geophysical and Geochemical Exploration,2014,38(4):825-834.
[13]刘金兰,赵斌,王万银,等.利用重磁资料研究南岭于都—赣县矿集区花岗岩与断裂分布特征[J].地质学报,2014,88(4):658-668.Liu J L,Zhao B,Wang W Y,et al.A study of the granite and faults distribution based on gravity and magnetic data obtained in YuduGanxian Ore Concentration Area of Nanling[J]. Acta Geologica Sinica,2014,88(4):658-668.
[14]冯兵,李建国,赵斌,等.音频大地电磁法在南岭于都—赣县矿集区银坑示范区深部矿产资源探测中的应用[J].地质学报,2014,88(4):669-675.Feng B,Li J G,Zhao B,et al.The application of audio magnetotelluric method(AMT)in Nanling Yudu-Gan County Ore-Concentrated Area Yinkeng Demonstration Plot to survey deep mineral resources[J].Acta Geologica Sinica,2014,88(4):669-675.
[15]魏祥荣.遥感在南岭带赣南段构造研究中的应用[J].华东铀矿地质,2001(1):21-30.Wei X R.Application of remote sensing in structural study of Southern Jiangxi Section of Nanling Zone[J].East China Uranium Geology,2001(1):21-30.
[16]姜枚,贾秀敏.南岭花岗岩岩石物理性质的研究[J].中国地质科学院矿床地质研究所所刊,1989(1):145-155.Jiang M,Jia X M.Physical properties of granite rocks in Nanling region[J].Bulletin of the Institite of Mineral Deposits Chinese Academy of Geological Sciences,1989(1):145-155.
[17]李建国,赵斌,孙少伟,等.南岭于都—赣县矿集区的综合物性特征[J].工程地球物理学报,2013,10(3):313-319.Li J G,Zhao B,Sun S W,et al.On comprehensive physical property of mineralization concentrated region in Yudu-Ganxian[J]. Chinese Journal of Engineering Geophysics,2013,10(3):313-319.
[18] Hood P,Mc Clure D J.Gradient measurements in ground magnetic prospecting[J].Geophysics,1965,30(3):403-410.
[19] Bhattacharyya B K.Two-dimensional harmonic analysis as a tool for magnetic interpretation[J].Geophysics,1965,30(5):829-857.
[20]钟清,孟小红,刘士毅.重力资料定位地质体边界问题的探讨[J].物探化探计算技术,2007,29(s):35-38.Zhong Q,Meng X H,Liu S Y.Discussion on the boundary problem of geological body location with gravity data[J]. Computing Techniques for Geophysical and Geochemical Exploration,2007,29(s):35-38.
[21] Cordell L. Gravimetric expression of graben faulting in SantaFe Country and the Espanola Basin[C]//Guidebook,30th Field Conf.,New Mexico:New Mexico Geol. Soc.,1979:59-64.
[22]余钦范,楼海.水平梯度法提取重磁源边界位置[J].物探化探计算技术,1994,16(4):363-367.Yu Q F,Lou H. Locating the boundaries of magnetic or gravity sources using horizontal gradient anomalies[J]. Computing Techniques for Geophysical and Geochemical Exploration,1994,16(4):363-367.
[23]周蒂,王万银,庞雄,等.地球物理资料所揭示的南海东北部中生代俯冲增生带[J].中国科学D辑:地球科学,2006,36(3):209-218.Zhou D,Wang W Y,Pang X,et al. Mesozoic subduction accretion zone in northeastern South China Sea revealed by geophysical data[J].Science in China Ser.D:Earth Sciences,2006,36(3):209-218.
[24] Wang W Y,Pan Y,Qiu Z Y. A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data[J].Applied Geophysics,2009,6(3):226-233.
[25]陈毓川,陈郑辉,曾载淋,等.南岭科学钻探第一孔选址研究[J].中国地质,2013,40(3):659-670.Chen Y C,Chen Z H,Zeng Z L,et al.Research on the site selection of Nanling Scientific Drilling-1[J]. Geology in China,2013,40(3):659-670.
[26]刘申叔,李上卿.东海油气地球物理勘探[M].北京:地质出版社,2001.Liu S S,Li S Q. Geophysical exploration of oil and gas in the East China Sea[M].Beijing:Geological Publishing House,2001.
[27]陈毓川.中国成矿体系与区域成矿评价[M].北京:地质出版社,2007.Chen Y C. Chinese mineralization system and assessment of regional mineralization[M]. Beijing:Geological Publishing Press,2007.
[28]邓晋福,赵国春,赵海玲,等.中国东部燕山期火山岩构造组合与造山—深部过程[J].地质评论,2000,46(1):41-48.Deng J F,Zhao G C,Zhao H L,et al. Yanshanian igneous petrotectonic assemblsge and orogenic-deep pressess in east China[J].Geological Review,46(1):41-48.