文峪金矿床505脉矿化特征及构造控矿规律

505脉总体走向270~310°,呈透镜体状、扁豆状以尖灭再现或尖灭侧现的形式产出.505脉为一典型的具多金属硫化物含金石英脉.含金矿物主要是黄铁矿,其次为方铅矿和黄铜矿.黄铁绢英岩化是金矿化的重要标志.控矿构造有4次脉动,与其对应,505脉分4个成矿阶段,主要是Ⅰ、Ⅱ阶段及Ⅰ、Ⅱ、Ⅲ阶段叠加的部位成矿最好.505脉受一近东西向脆-韧性剪切带控制.矿体主要产于断裂的85~90°走向段和倾角为小于45~50°的缓倾段.这些部位也是多次矿化叠加、矿体厚度大、矿石品位高的部位,这些地段也是工业矿体产出的地段.

MINERALIZATION FEATURES AND REGULARITIES OF ORE CONTROLLING BY FAULT OF VEIN No505 IN WENYU GOLD DEPOSIT

enyu gold deposit in Henan Province is a large　scale auriferous quartz type gold lead deoposit,of which Vein No.505 is the major mined lodeThe spatial occurence of the vein is strictly controlled by an E W stricking brittle ductile shear beltThe mineralization process can be divided into 4 stages, which are:(Ⅰ)pyrite quartz stage,(Ⅱ)quartz pyrite stage,(Ⅲ)quartz polymetallic sulfide stage and (Ⅳ)quartz carbonate stageThe thickness of ore body and grade ofore are controlled by the distribution of auriferous quartz and the superimposed development of the main mineralization stages of Ⅱand ⅢcollectivelyThe structure controlling on gold mineralization shows as follow:1)Affected by the attitude and moving way of ore controlling fault,the auriferous quartz body mainly occures at the positions where the strike of the fault is less than 90° and the dip angle is less than 50°.2)TheⅡand Ⅲ mineralization stages mainly superimpose at the positions where the strike of the fault is 85～90° and the dip angle is 45～50°.3)The prominent zones by shape of the lying wall of the ore controlling fault are the positions where the ore shoots locateAnd 4)controlled by the extent of the prominent zones of the lying wall of the ore controlling fault,the ore shoots in Vein No505 incline west in space