粤北梅子窝钨矿区花岗岩体岩浆动力学特征分析
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摘要
基于梅子窝钨矿床地质特征,以构造地质学、流体力学等为主要研究手段,结合前人对梅子窝钨矿隐伏花岗岩侵入体地球化学特征的研究数据,对矿区岩体形成时的温度、岩浆密度、岩浆粘度、岩浆冷凝速度等岩浆动力学参数进行计算分析岩浆动力学特征,得出有利于梅子窝钨矿形成的岩浆动力学性质,包括岩浆粘度的明显异差促使矿化分带;岩浆密度的不明显变化使岩浆侵位过程中不易发生对流,有利于能量聚;岩浆冷却速度缓慢使其有足够的时间满足矿物晶体生长,有利于成矿元素的充分聚集。通过对花岗岩体侵位机制岩浆动力学方面的深入探讨,查明了岩体侵位与钨矿化的关系,总结矿床的成因的流体动力学依据,为矿床成因探讨和矿山可持续开发利用提供了科学依据。
Based on the geological characteristics of Muiziwo tungsten deposit,and the previous geochemical data of concealed granite bodies in the Meiziwo ore area,with the main research methods of structural geology and fluid dynamics,the temperature,magmatic density,viscosity,condensation velocity and other parameters,of the granite bodies are calculated and the characteristics of magmatic dynamics is also analyzed.It is inferred that the magmatic dynamic properties are favorable to the formation of Muiziwo tungsten deposit.The obvious difference of magmatic viscosity promotes mineralization zoning.The indistinct change of magma density makes it difficult for the amgmatic convection during magma emplacement,which is favorable to energy accumulation,and the slow cooling rate of magma makes it to have enough time for the growth of mineral crystals,which is helpful to the full accumulation of ore-forming elements.In this paper,the magmatic dynamics of emplacement mechanism of the granite body is discussed,the relationship between the emplacement of the granite body and tungsten mineralization is found out.The hydrodynamic basis of deposit genesis is summarized.It provides a scientific basis for the ore genesis discussion and sustainable development and utilization of the deposit.
Based on the geological characteristics of Muiziwo tungsten deposit,and the previous geochemical data of concealed granite bodies in the Meiziwo ore area,with the main research methods of structural geology and fluid dynamics,the temperature,magmatic density,viscosity,condensation velocity and other parameters,of the granite bodies are calculated and the characteristics of magmatic dynamics is also analyzed.It is inferred that the magmatic dynamic properties are favorable to the formation of Muiziwo tungsten deposit.The obvious difference of magmatic viscosity promotes mineralization zoning.The indistinct change of magma density makes it difficult for the amgmatic convection during magma emplacement,which is favorable to energy accumulation,and the slow cooling rate of magma makes it to have enough time for the growth of mineral crystals,which is helpful to the full accumulation of ore-forming elements.In this paper,the magmatic dynamics of emplacement mechanism of the granite body is discussed,the relationship between the emplacement of the granite body and tungsten mineralization is found out.The hydrodynamic basis of deposit genesis is summarized.It provides a scientific basis for the ore genesis discussion and sustainable development and utilization of the deposit.
引文
[1]姜海,李文铅.梅子窝钨矿加里东期花岗闪长岩的地球化学特征及岩石成因探讨[J].中国钨业,2013,28(6):1-7.
[2]马昌前.一门新兴的边缘学科:岩浆动力学[J].世界科学,1987(6):45-47.
[3]李社宏,李文铅,赵凤生,等.瑶岭—石人嶂钨矿构造动力特征探讨[J].中国钨业,2008,23(3):1-6.
[4]李社宏.粤北梅子窝钨矿深部矿脉分布规律研究[D].广州:中国科学院广州地球化学研究所,2010:37-47.
[5]翟伟,孙晓明,邬云山,等.粤北梅子窝钨矿区隐伏花岗闪长岩锆石SHRIMP U-Pb年龄与40 Ar/39 Ar成矿年龄及其地质意义[J].高校地质学报,2010,16(2):177-185.
[6]吴限,江晓龙,韦龙明,等.粤北石人嶂莲花山隐伏花岗岩侵入体岩浆动力学特征分析[J].地质与勘探,2018,54(1):31-40.
[7]华仁民,陈培荣,张文兰,等.华南中、新生代与花岗岩类有关的成矿系统[J].中国科学:D辑地球科学,2003,33(4):335-343.
[8]华仁民.南岭中生代陆壳重熔型花岗岩类成岩-成矿的时间差及其地质意义[J].地质论评,2005,51(6):633-639.
[9]韦龙明,林锦富,李文铅,等.广东梅子窝钨矿“五层楼”叠加现象探讨[J].地质学报,2008,82(7):888-893.
[10]胡世杰.石人嶂钨矿构造应力分析[J].南方金属,2006(4):36-40.
[11]汪洋.南岭燕山早期花岗岩成因类型的进一步探讨[J].地质论评,2008,54(2):162-174.
[12]王德滋.华南花岗岩研究的回顾与展望[J].高校地质学报,2004,10(3):305-314.
[13]付建明,马丽艳,程顺波,等.南岭地区锡(钨)矿成矿规律及找矿[J].高校地质学报,2013,19(2):202-212.
[14]马昌前.岩浆活动中某些动力学参数的估算方法:流体动力学原理的应用[J].地质科技情报,1986(3):47-54.
[15]黄茂新,朱自尊.对中、酸性岩浆岩形成温度计算问题的探讨[J].成都地质学院学报,1980(3):55-65.
[16]翁海姣,粤北梅子窝钨矿床构造叠加晕研究[D].桂林:桂林理工大学,2016.
[17]赵海玲.岩浆物理性质和流体动力学研究[J].地学前缘,1994,1(1/2):104-110.
[18] CLEMENS J D,MAWER C K.Granitic magma traspor tby fracture propagation[J].Tectonophysics,1992,204:339-360.
[19]冯佐海,王春增,王葆华.花岗岩侵位机制与成矿作用[J].桂林工学院学报,2009,29(2):183-194.
[20] SHAW H R.Viscosity of magmatic silicate liquids:an empirical method of prediction[J].American Journal of Science,1972,272(5):870-893.
[21]侯增谦.岩浆密度及其重要意义[J].岩石矿物学杂志,1990,9(4):309-319.
[22]徐晓春,岳书仓,潘成荣,等.河南桐柏老湾花岗岩岩浆动力学与成矿[J].岩石学报,2001,17(2):245-253.
[23] BOTTINGA Y,WEILL D F,RICHET P.Densities calculations for silieate liquids.I.Revised method for aluminosilicate compositions[J].Geochimica et Cosmochimica Acta.1982,46:909-919.
[24]严成文,李文铅,李社宏,等.粤北石人嶂钨矿成矿机理及成矿构造背景[J].中国钨业,2009,24(1):12-15.
[25]芦武长.年代学研究中封闭温度的计算及其应用[J].成都地质学院学报,1980,20(4):29-36.
[2]马昌前.一门新兴的边缘学科:岩浆动力学[J].世界科学,1987(6):45-47.
[3]李社宏,李文铅,赵凤生,等.瑶岭—石人嶂钨矿构造动力特征探讨[J].中国钨业,2008,23(3):1-6.
[4]李社宏.粤北梅子窝钨矿深部矿脉分布规律研究[D].广州:中国科学院广州地球化学研究所,2010:37-47.
[5]翟伟,孙晓明,邬云山,等.粤北梅子窝钨矿区隐伏花岗闪长岩锆石SHRIMP U-Pb年龄与40 Ar/39 Ar成矿年龄及其地质意义[J].高校地质学报,2010,16(2):177-185.
[6]吴限,江晓龙,韦龙明,等.粤北石人嶂莲花山隐伏花岗岩侵入体岩浆动力学特征分析[J].地质与勘探,2018,54(1):31-40.
[7]华仁民,陈培荣,张文兰,等.华南中、新生代与花岗岩类有关的成矿系统[J].中国科学:D辑地球科学,2003,33(4):335-343.
[8]华仁民.南岭中生代陆壳重熔型花岗岩类成岩-成矿的时间差及其地质意义[J].地质论评,2005,51(6):633-639.
[9]韦龙明,林锦富,李文铅,等.广东梅子窝钨矿“五层楼”叠加现象探讨[J].地质学报,2008,82(7):888-893.
[10]胡世杰.石人嶂钨矿构造应力分析[J].南方金属,2006(4):36-40.
[11]汪洋.南岭燕山早期花岗岩成因类型的进一步探讨[J].地质论评,2008,54(2):162-174.
[12]王德滋.华南花岗岩研究的回顾与展望[J].高校地质学报,2004,10(3):305-314.
[13]付建明,马丽艳,程顺波,等.南岭地区锡(钨)矿成矿规律及找矿[J].高校地质学报,2013,19(2):202-212.
[14]马昌前.岩浆活动中某些动力学参数的估算方法:流体动力学原理的应用[J].地质科技情报,1986(3):47-54.
[15]黄茂新,朱自尊.对中、酸性岩浆岩形成温度计算问题的探讨[J].成都地质学院学报,1980(3):55-65.
[16]翁海姣,粤北梅子窝钨矿床构造叠加晕研究[D].桂林:桂林理工大学,2016.
[17]赵海玲.岩浆物理性质和流体动力学研究[J].地学前缘,1994,1(1/2):104-110.
[18] CLEMENS J D,MAWER C K.Granitic magma traspor tby fracture propagation[J].Tectonophysics,1992,204:339-360.
[19]冯佐海,王春增,王葆华.花岗岩侵位机制与成矿作用[J].桂林工学院学报,2009,29(2):183-194.
[20] SHAW H R.Viscosity of magmatic silicate liquids:an empirical method of prediction[J].American Journal of Science,1972,272(5):870-893.
[21]侯增谦.岩浆密度及其重要意义[J].岩石矿物学杂志,1990,9(4):309-319.
[22]徐晓春,岳书仓,潘成荣,等.河南桐柏老湾花岗岩岩浆动力学与成矿[J].岩石学报,2001,17(2):245-253.
[23] BOTTINGA Y,WEILL D F,RICHET P.Densities calculations for silieate liquids.I.Revised method for aluminosilicate compositions[J].Geochimica et Cosmochimica Acta.1982,46:909-919.
[24]严成文,李文铅,李社宏,等.粤北石人嶂钨矿成矿机理及成矿构造背景[J].中国钨业,2009,24(1):12-15.
[25]芦武长.年代学研究中封闭温度的计算及其应用[J].成都地质学院学报,1980,20(4):29-36.
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