甘肃小柳沟钨钼铜铁多金属矿集区成矿规律及找矿方向

摘要

小柳沟钨钼铜铁多金属矿集区由祁青、小柳沟、贵山、世纪、祁宝5个钨钼铜多金属矿床和小柳沟、贵山、朱龙关、龙阿过陇4个铁矿床组成,除小柳沟和龙阿过陇铁矿沟产于蓟县系镜铁山群下岩组炭质绢云千枚岩和绿泥绢云千枚岩外,其余矿体均产于长城系朱龙关群上下岩组及其过渡带的矽卡岩化云母角闪片岩、矽卡岩化灰岩和石英脉中.矿床成因类型为火山喷流(气)沉积改(再)造型矿床,矿床工业类型主要为石英脉型、矽卡岩型、破碎带型、斑岩型,矿石主要为浸染状-稠密浸染状白钨矿矿石和稠密浸染状白钨矿-黄铜矿矿石,矿床形成和分布与地层、构造、岩体关系密切,隐伏岩浆(体)侵位构造控制了矿床(点)类型与分布,背斜层间滑动虚脱构造控制了矿体的规模、产状和形态,岩性层间构造裂隙控制了成矿元素的富集.下步勘查中,应当充分地重视不同矿床的整体性研究,把攻深找盲作为勘查第一要务,将矿床交接带与矿床外围作为重点找矿空间,加强寻伴生组分和其他新类型矿体的研究与查找.%Xiaoliugou tungsten-molybdenum-copper-iron polymetallic ore deposit area consists of five tungsten-molybdenum-copper polymetallic deposits such as Yanqing, Xiaoliugou, Guishan, Shiji and Yubao, and four iron deposits such as Xiaoliugou, Guishan, Zhulongguan and Long'a. The composition of the iron ore deposit, except for the Xiaoliugou and Long' ayu iron ore mines, is produced in the Carboniferous Qianyun Qianyan and the Green Mudyun Qianyan, which are produced in the Xiayan Formation of the Jingtaishan Group in the Jixian County. The diagenetic mica volcanic schist, skarnized limestone and quartz veins of the upper and lower rock formations of the Zhulongguan group and their transition zones in the Great Wall. The genetic type of the deposit is a volcanic jet (gas) sedimentary (re) modeling deposit. The industrial type of the deposit is mainly quartz vein type, skarn type, fracture zone type, porphyry type, and the ore is mainly disseminated-densely disseminated white. Tungsten ore and densely disseminated scheelite-chalcopyrite ore. The formation and distribution of deposits are closely related to strata, structure and rock mass. The concealed magmatic (body) emplacement structure controls the type and distribution of deposits (points), and the sliding dislocation structure between the anticlines controls the scale, occurrence and morphology of the ore bodies. The lithologic interlayer structural fissures control the enrichment of ore-forming elements. In the next step of exploration, we should pay full attention to the overall study of different deposits, and find the blindness of the deep-seated as the first priority of exploration, and use the deposit and the periphery of the deposit as the key prospecting space to strengthen the matching components and other new types of mines.