Geological Characteristics and Genesis of Dongyang Large Tungsten Deposit in South Qinling,Shaanxi Province
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摘要: 东阳大型钨矿床是近年陕西南秦岭地区地质找矿的重大发现。该矿床与燕山期中酸性侵入体有密切关系，其地质特征具有“一矿三型”特点，即接触交代型、岩浆热液（石英脉）型和残坡积型等3种成因类型共存一体。接触交代型钨矿体受控于燕山期黑云二长花岗岩与白云岩、白云石大理岩接触带及附近断裂带，与矽卡岩化关系密切；岩浆热液（石英脉）型钨矿体则主要沿近南北向及北北东向的断裂带充填；残坡积型钨矿体主要由矽卡岩型钨矿体地表风化、就近堆积而成。该矿床的发现，不仅对陕西南秦岭乃至整个秦岭造山带钨矿勘查工作具有现实意义，而且对深化中国“南钨北扩，东钨西扩”认识，也具有一定的理论价值。Abstract: Dongyang large tungsten deposit in south Qinling of Shaanxi province, is an important discovery of geological prospecting in recent years. The deposit is closely related to the Yanshanian intermediate acid intrusive body, having the geological characteristics of "one ore and three types" i.e. contacting metasomatic type, magmatic hydrothermal (quartz vein) type and residual deluvial type.The contacting metasomatic tungsten ore body is controlled by the Yanshanian biotite monzogranite dolomite marble contact zone and the nearby fault zone,which is closely related to skarnization;the magmatic hydrothermal (quartz vein) type tungsten ore body is mainly filled along the nearly north-south and north-north-east fault zone; the residual deluvial type tungsten ore body mainly formed by the surface weathering and nearby accumulation of skarn type tungsten ore body.The discovery of the deposit is of practical significance for the exploration of tungsten deposits in south Qinling and in Qinling orogenic belt, which deepens the understanding that the regions of the prospecting and exploration of tungsten deposits have been expanded in the whole nation.
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Key words:
- tungsten deposit /
- granite /
- geological characteristics /
- genesis of the deposit /
- south Qinling
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