汝阳竹园沟钼矿床地质特征及找矿方向

Geological Characteristic and Ore Prospecting for Zhuyuangou Molybdenum Deposit in Ruyang County,Hena Province

汝阳竹园沟钼矿床位于河南省汝阳县南部的太山庙复式花岗岩体北东侧第二次侵入的细粒花岗岩(γ53-2)岩体内接触带。在讨论成矿地质背景基础上,对矿区构造、岩体、围岩蚀变及地球化学特征进行了研究。矿体呈似层状分布,其形态、产状受第二次侵入的细粒花岗岩(γ53-2)岩体形态、产状影响较大,说明竹园沟钼矿床无论在空间上、时间上、成因上均与深部同熔型花岗岩浆有关,矿床成因为斑岩型钼矿。找矿标志和找矿方向的提出,对以后区域上花岗岩基分布区的找钼工作有一定的指导意义。

Zhuyuangou molybdenum deposit is located within the inner contact zone of the second invasive fine-grained granite body,which is in the north-east side of Taishanmiao composite granite mass.Based on the study of the metallogenic background,geologic structure,rock mass,wall-rock alteration and geochemical features,it is suggested that the orebody is stratiform-like,and its shape and occurrence is seriously affected by the second invasive fine-grained granite body（γ53-2）,which shows that the deposit is related to the deep syntexis-type granite no matter the space,time and genesis.And the deposit belongs to the porphyry molybdenum type.Meanwhile,the proposl of the ore prospecting indicators and direction have a certain guidance significance for the following ore-search work in granitic batholith distribution region of this area.