新疆土屋斑岩铜矿区地震反射法可行性研究
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摘要
为了解闪长玢岩和斜长花岗斑岩是否有足够的弹性差异,考察形成反射的可能性,选择最具代表性的新疆土屋—延东铜矿区,开展了岩芯标本测量和地球物理测井工作。通过对不同岩矿标本的密度、速度及电性参数分析,结合该区的地质及成矿特点,系统研究了矿区内主要岩性、矿(化)体的物性特征及矿(化)体与主要围岩的物性差异,提出了此类矿床(体)有效的物探找矿方法,为在该区开展金属矿地震提供依据,同时也为西部找矿提供新的方法技术手段。
In order to understand the elasticity difference between diorite porphyrite and plagioclase granite porphyry and to investigate the possibility of forming reflection, the authors carried out rock and ore sample measurement and welllogging in the most representative TuwuYandong porphyry copper deposit. According to the statistics of density, velocity and electrical properties of the specimens in combination with geological characteristics and mineralogical data obtained from cores and welllogging, the physical properties of the main ores and rocks as well as the differences between them are systemically studied. On such a basis, the most effective geophysical prospecting method is proposed for exploration of this kind of deposits and for development of seismic exploration in metallic ore deposits. The technique can also be used as a new means in search for ore deposits in western China.
In order to understand the elasticity difference between diorite porphyrite and plagioclase granite porphyry and to investigate the possibility of forming reflection, the authors carried out rock and ore sample measurement and welllogging in the most representative TuwuYandong porphyry copper deposit. According to the statistics of density, velocity and electrical properties of the specimens in combination with geological characteristics and mineralogical data obtained from cores and welllogging, the physical properties of the main ores and rocks as well as the differences between them are systemically studied. On such a basis, the most effective geophysical prospecting method is proposed for exploration of this kind of deposits and for development of seismic exploration in metallic ore deposits. The technique can also be used as a new means in search for ore deposits in western China.
引文
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[2] BarryJD,BruceRG,OwenAJ,etal.Seismicreflectionimagingofmineralsystems:Threecasehistories[J].Geophysics,2000,65(6):1852-1861.
[3] BasshaliR,RonMC.CaseHistory:Seismicandpotential fieldimagingoftheGuichonCreekbatholith,BritishColumbia,Canada,todelineatestructureshostingporphyrycopperdeposits[J].Geophysics,2000,65(5):1418-1434.
[4] Gervais,AndrewJC.Shallow,high resolusionseismicimagingattheAnsilminingcampintheAbitibigreenstonebelt[J].Geophysics,1998,63(2):379-391.
[5] MatthewHS,BerndM,GrahamA,etal.Physicalpropertiesandseismicimagingofmassivesulfides[J].Geophysics,2000,65(6):1882-1889.
[6] NelsonPH,JohnstonD.Geophysicalandgeochemicallogsfromacopperoxidedeposit,SantaCruzproject,CasaGrande,Arizona[J].Geophysics,1994,59(12):1827-1838.
[7] 孙明,林君.τ p变换去除金属矿地震资料中的线性干扰[J].物探与化探,2001,25(6):432-436.
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