鄂东南地区控岩构造及隐伏岩体特征的地球物理解释
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摘要
利用小波多尺度分析、边界识别、连续复小波频谱分析、3D磁化强度反演等方法处理解释鄂东南地区重磁资料得出:(1)山坡-枫林超壳断裂北倾,由于印支期与燕山期的改造,浅部断裂在平面上呈"S"形,中西段向南偏移,东段向北偏移.它控制了印支期与燕山期岩体的形成与分布.断裂北盘的鄂城、铁山、金山店及灵乡岩体主要以铁矿为主,而南盘的阳新、殷祖、郭家桥等岩体则以铜多金属为主.(2)深部存在岩浆房,深度约5km.岩浆通过构造薄弱位置上侵就位,以岩株、岩枝和岩墙的形式构成中浅部和出露岩体.(3)鄂城岩体南、铁山岩体北、金山店岩体南缘东段可能存在隐伏矿体.陈家湾隐伏岩体、金牛-肖家边隐伏岩体、灵乡西段隐伏岩体与碳酸盐地层接触的位置是成矿的有利位置.
In this paper,wavelet multi-scale analysis/boundary identification method/continuous complex wavelet time-frequency analysis/3 Dmagnetization inversion are used to process and interpret gravity and magnetic data in the southeast Hubei Province.It is found the follows.(1)The Shanpo-Fenglin deeply-penetrating fault is north dipping and shallow part shows shape of"S",of which middlewestern section deviates to south and east section deviates to north as a result of transformation in Indo-Chinese epoch and Yanshanian.It has controlled the formation and distribution of rock mass in Indo-Chinese epoch and Yanshanian.Echeng/Tieshan/Jinshandian/Lingxiang rock masses are dominated by iron ore on the north.Yangxin/Yinzu/Guojiaqiao rock masses are dominated by copper polymetallic ore on the south.(2)Magma chamber is located in deep,with a depth of about 5 km.Magma intruded upward and emplaced through weakness structure,which formed mid-shallow and exposed rock mass in the shape of bead/apophyses/dike.(3)There may exist concealed ore body in south of Echeng rock mass/north of Tieshan rock mass/east part of the south margin of Jinshandian rock mass.The areas where Chenjiawan exposed rock mass/Jinniu-Xiaojiabian exposed rock mass/west of Lingxiang exposed rock mass are in contact with carbonate beds are favourable for mineralization.
In this paper,wavelet multi-scale analysis/boundary identification method/continuous complex wavelet time-frequency analysis/3 Dmagnetization inversion are used to process and interpret gravity and magnetic data in the southeast Hubei Province.It is found the follows.(1)The Shanpo-Fenglin deeply-penetrating fault is north dipping and shallow part shows shape of"S",of which middlewestern section deviates to south and east section deviates to north as a result of transformation in Indo-Chinese epoch and Yanshanian.It has controlled the formation and distribution of rock mass in Indo-Chinese epoch and Yanshanian.Echeng/Tieshan/Jinshandian/Lingxiang rock masses are dominated by iron ore on the north.Yangxin/Yinzu/Guojiaqiao rock masses are dominated by copper polymetallic ore on the south.(2)Magma chamber is located in deep,with a depth of about 5 km.Magma intruded upward and emplaced through weakness structure,which formed mid-shallow and exposed rock mass in the shape of bead/apophyses/dike.(3)There may exist concealed ore body in south of Echeng rock mass/north of Tieshan rock mass/east part of the south margin of Jinshandian rock mass.The areas where Chenjiawan exposed rock mass/Jinniu-Xiaojiabian exposed rock mass/west of Lingxiang exposed rock mass are in contact with carbonate beds are favourable for mineralization.
引文
Bhattacharyya,B.K.,1964.Magnetic Anomalies Due to Prism-Shaped Bodies with Arbitrary Polarization.Geophysics,29(4):517-531.https://doi.org/10.1190/1.1439386
Bhattacharyya,B.K.,Leu,L.,1975.Spectral Analysis of Gravity and Magnetic Anomalies Due to TwoDimensional Structures.Geophysics,40(6):993-1013.https://doi.org/10.1190/1.1440593
Bhattacharyya,B.K.,Leu,L.,1977.Spectral Analysis of Gravity and Magnetic Anomalies Due to Rectangulor Prismatic Bodies.Geophysics,42(1):41-50.https://doi.org/10.1190/1.1440712
Hu,Q.L.,2014.The Mesozoic Diagenetic&Metallogenic Tectonic Background and the Temporal&Spatial Distribution in the Southeast of Hubei Province.Resources Environment&Engineering,28(6):767-776(in Chinese with English abstract).
Miller,H.G.,Singh,V.,1994.Potential Field Tilt-A New Concept for Location of Potential Field Sources.Journal of Applied Geophysics,32(2-3):213-217.doi:10.1016/0926-9851(94)90022-1
Sailhac,P.,Galdeano,A.,Gibert,D.,et al.,2000.Identification of Sources of Potential Fields with the Continuous Wavelet Transform:Complex Wavelets and Application to Aeromagnetic Profiles in French Guiana.Journal of Geophysical Research:Solid Earth,105(B8):19455-19475.doi:10.1029/2000jb900090
Spector,A.,Grant,F.S.,1970.Statistical Models for Interpreting Aeromagnetic Data.Geophysics,35(2):293-302.https://doi.org/10.1190/1.1440092
Su,X.D.,1995.Crust-Mantle Structure and Characteristics of Southeast Hubei Metallogenic Province.Geology and Prospecting,31(1):18-25(in Chinese with English abstract).
Wang,Y.,Li,L.T.,Su,S.M.,2007.Geological Features and Mineralization Forecast of Iron Deposits in the Eastern Hubei.Geology and Prospecting,43(1):17-25(in Chinese with English abstract).
Yang,Y.S.,Li,Y.Y.,Liu,T.Y.,2010.Continuous Wavelet Transform,Theoretical Aspects and Application to Aeromagnetic Data at the Huanghua Depression,Dagang Oilfield,China.Geophysical Prospecting,58(4):669-684.doi:10.1111/j.1365-2478.2009.00847.x
Zhang,G.S.,1992.Structural Characteristics of Yanshan Period of Southeastern Hubei and Its Rock Control and Ore Control.Geology of Hubei,6(2):16-29(in Chinese with English abstract).
Zhang,G.S.,1998.Characteristics of the Structures and Their Rock and Ore Control Low.Hubei Geology&Mincral Resources,12(2):16-23(in Chinese with English abstract).
Zhang,P.Q.,1990.Statistical Analysis of Power Spectrum of Potential Field Anomalies.Computing Techniques for Geophysical and Geochemical Exploration,12(3):191-194(in Chinese with English abstract).
Zhang,P.Q.,1991.Statistical Analysis of the Frequency Spectrum and Power Spectrum of Potential Field Anomalies.Computing Techniques for Geophysical and Geochemical Exploration,13(1):7-12(in Chinese with English abstract).
Zhou,A.B.,Zhang,G.S.,Xu,L.,et al.,2013.The Inference and Prospecting Prospect of Concealed Rock Mass in Southeastern Hubei.Resources Environment&Engineering,27(Suppl.):81-85(in Chinese).
Zhou,T.F.,Fan,Y.,Yuan,F.,2008.Advances on Petrogenesis and Metallogeny Stady of the Mineralization Belt of the Middle and Lower Reaches of the Yangtze River Area.Acta Petrologica Sinica,24(8):1665-1678(in Chinese with English abstract).
胡清乐,2014.鄂东南地区中生代成岩成矿构造背景与时空分布规律.资源环境与工程,28(6):767-776.
苏欣栋,1995.鄂东南成矿区壳幔结构及其特征.地质与勘探,31(1):18-25.
王瑜,李朗田,苏绍明,2007.鄂东铁矿成矿地质特征与找矿预测.地质与勘探,43(1):17-25.
张国胜,1992.鄂东南燕山期构造特征及其控岩控矿作用.湖北地质,6(2):16-29.
张国胜,1998.鄂东南地区构造特征及其控岩控矿规律.湖北地矿,12(2):16-23.
张培琴,1990.位场异常功率谱的统计分析.物探化探计算技术,12(3):191-194.
张培琴,1991.位场异常频谱与功率谱的统计分析.物探化探计算技术,13(1):7-12.
周安保,张国胜,徐磊,等,2013.鄂东南隐伏岩体的推断及其找矿前景.资源环境与工程,27(增刊):81-85.
周涛发,范裕,袁峰,2008.长江中下游成矿带成岩成矿作用研究进展.岩石学报,24(8):1665-1678.
Bhattacharyya,B.K.,Leu,L.,1975.Spectral Analysis of Gravity and Magnetic Anomalies Due to TwoDimensional Structures.Geophysics,40(6):993-1013.https://doi.org/10.1190/1.1440593
Bhattacharyya,B.K.,Leu,L.,1977.Spectral Analysis of Gravity and Magnetic Anomalies Due to Rectangulor Prismatic Bodies.Geophysics,42(1):41-50.https://doi.org/10.1190/1.1440712
Hu,Q.L.,2014.The Mesozoic Diagenetic&Metallogenic Tectonic Background and the Temporal&Spatial Distribution in the Southeast of Hubei Province.Resources Environment&Engineering,28(6):767-776(in Chinese with English abstract).
Miller,H.G.,Singh,V.,1994.Potential Field Tilt-A New Concept for Location of Potential Field Sources.Journal of Applied Geophysics,32(2-3):213-217.doi:10.1016/0926-9851(94)90022-1
Sailhac,P.,Galdeano,A.,Gibert,D.,et al.,2000.Identification of Sources of Potential Fields with the Continuous Wavelet Transform:Complex Wavelets and Application to Aeromagnetic Profiles in French Guiana.Journal of Geophysical Research:Solid Earth,105(B8):19455-19475.doi:10.1029/2000jb900090
Spector,A.,Grant,F.S.,1970.Statistical Models for Interpreting Aeromagnetic Data.Geophysics,35(2):293-302.https://doi.org/10.1190/1.1440092
Su,X.D.,1995.Crust-Mantle Structure and Characteristics of Southeast Hubei Metallogenic Province.Geology and Prospecting,31(1):18-25(in Chinese with English abstract).
Wang,Y.,Li,L.T.,Su,S.M.,2007.Geological Features and Mineralization Forecast of Iron Deposits in the Eastern Hubei.Geology and Prospecting,43(1):17-25(in Chinese with English abstract).
Yang,Y.S.,Li,Y.Y.,Liu,T.Y.,2010.Continuous Wavelet Transform,Theoretical Aspects and Application to Aeromagnetic Data at the Huanghua Depression,Dagang Oilfield,China.Geophysical Prospecting,58(4):669-684.doi:10.1111/j.1365-2478.2009.00847.x
Zhang,G.S.,1992.Structural Characteristics of Yanshan Period of Southeastern Hubei and Its Rock Control and Ore Control.Geology of Hubei,6(2):16-29(in Chinese with English abstract).
Zhang,G.S.,1998.Characteristics of the Structures and Their Rock and Ore Control Low.Hubei Geology&Mincral Resources,12(2):16-23(in Chinese with English abstract).
Zhang,P.Q.,1990.Statistical Analysis of Power Spectrum of Potential Field Anomalies.Computing Techniques for Geophysical and Geochemical Exploration,12(3):191-194(in Chinese with English abstract).
Zhang,P.Q.,1991.Statistical Analysis of the Frequency Spectrum and Power Spectrum of Potential Field Anomalies.Computing Techniques for Geophysical and Geochemical Exploration,13(1):7-12(in Chinese with English abstract).
Zhou,A.B.,Zhang,G.S.,Xu,L.,et al.,2013.The Inference and Prospecting Prospect of Concealed Rock Mass in Southeastern Hubei.Resources Environment&Engineering,27(Suppl.):81-85(in Chinese).
Zhou,T.F.,Fan,Y.,Yuan,F.,2008.Advances on Petrogenesis and Metallogeny Stady of the Mineralization Belt of the Middle and Lower Reaches of the Yangtze River Area.Acta Petrologica Sinica,24(8):1665-1678(in Chinese with English abstract).
胡清乐,2014.鄂东南地区中生代成岩成矿构造背景与时空分布规律.资源环境与工程,28(6):767-776.
苏欣栋,1995.鄂东南成矿区壳幔结构及其特征.地质与勘探,31(1):18-25.
王瑜,李朗田,苏绍明,2007.鄂东铁矿成矿地质特征与找矿预测.地质与勘探,43(1):17-25.
张国胜,1992.鄂东南燕山期构造特征及其控岩控矿作用.湖北地质,6(2):16-29.
张国胜,1998.鄂东南地区构造特征及其控岩控矿规律.湖北地矿,12(2):16-23.
张培琴,1990.位场异常功率谱的统计分析.物探化探计算技术,12(3):191-194.
张培琴,1991.位场异常频谱与功率谱的统计分析.物探化探计算技术,13(1):7-12.
周安保,张国胜,徐磊,等,2013.鄂东南隐伏岩体的推断及其找矿前景.资源环境与工程,27(增刊):81-85.
周涛发,范裕,袁峰,2008.长江中下游成矿带成岩成矿作用研究进展.岩石学报,24(8):1665-1678.