辽宁本溪小阳沟铁矿深部找矿成果及其意义

ACHIEVEMENT AND SIGNIFICANCE OF THE DEEP PROSPECTING IN THE XIAOYANGGOU IRON DEPOSIT IN BENXI, LIAONING PROVINCE

通过钻探等手段发现小阳沟铁矿为埋藏较深、厚度较大、层位较多、倾斜中等的层状矿体,探获(332)+(333)磁铁矿及低品位矿量1.4×108t.矿体埋深标高-100^+838 m,平均垂厚86 m,呈单斜层状产出,厚度变化稳定,矿化连续,品位均匀.矿石成分简单,矿石矿物主要为磁铁矿,脉石矿物主要是石英、长石.矿物粒度呈中细粒—微细粒不均匀嵌布.矿石结构为粒状变晶结构、氧化交代结构.矿石构造为细条带状构造、柔皱状构造或角砾状构造.矿床类型为火山沉积变质型铁矿.根据研究分析,总结出深部找矿标志.

According to drilling data, the Xiaoyanggou iron deposit is composed of stratified orebodies, which are characterized by deep burial, large thickness, multiple layers and medium dipping angle, with 140 million tons of low grade magnetite reserves. The altitude of buried orebodies ranges from-100 to 838 m above sea level, with monoclinic layered shape, stable thickness, continuous mineralization and even grade. The composition of ore is simply dominated by magnetite with felsic gangue. The ores are in granoblastic and oxidation replacement textures, with fine banded, wrinkle or breccia structures. The genetic type of the Xiaoyanggou deposit belongs to volcanic-sedimentary metamorphic iron deposit. The deep prospecting achievement not only increases the resources in the area, but also provide a reference for the exploration in surrounding areas.