黑龙江翠宏山铁多金属矿床控矿因素分析

Ore-control Factors and Prospection of the Cuihongshan Iron-Polymetallic Deposit in Heilongjiang Procince

翠宏山铁多金属矿是小兴安岭多金属成矿带上一个典型的矽卡岩型铁多金属矿床,产于中奥陶世白岗质花岗岩与寒武纪铅山组(?1q)海相碳酸盐岩、砂岩北西向接触带中。以接触带为中心,钼钨矿体基本上赋存于白岗质花岗岩体中,铁矿体/铁锌矿体主要产出于接触带-矽卡岩中,铜锌矿体多以铅山组的层间破碎带为容矿场所。各矿体形态、产状变化与矽卡岩带具有宏观上的一致性。白岗质花岗岩、铅山组地层及其接触带构成了三位一体的控矿、容矿体系。研究认为碳酸盐岩地层、白岗质花岗岩、北西向接触带的有机耦合是区内矽卡岩型铁多金属矿形成的主要条件,同时,三要素控矿的综合运用是矿区深部及外围勘查突破的关键。

Abatract：Cuihongshan iron-polymetallic deposit is one of typical Skam type iron-polymetallic deposit in the Xiaoxing＇ anling metallogenic belt. The deposit occurs only near the inside and outside contact zone be- tween the Ordovician granite and Cambria Qianshan group of marine carbonate rocks and sandstone. In the con- tact zone as the center, Mo-W ore bodies are basically hosted in granitic body, Fe and Fe-Zn ore bodies are main- ly hosted in the Skarn zone, Cu-Zn ore bodies are usually hosted in interlayer fracture zone of Qianshan group. And also, the ore body shape and the change of attitude are consistency with the Skarn zone. The granite, Qian- shan formation and contact zone formed three-in-one system which controls and contains the ore bodies. It is sug- gested that the coupling of carbonate strata, granitic and NW-trending contact zones is the main metallogenic con- ditions of Skarn type Fe-polymetallic deposit in the area. Furthermore, the comprehensive utilization of the three ore control conditions is the key in the deep and periphery of the ore exploration.