香格里拉雪鸡坪铜矿成矿特征及找矿方向

Metallogenic Characteristics and Prospecting Direction of Xuejiping Copper Deposit in Shangri-La

结合矿区Ⅲ、Ⅳ矿体补充勘探获得的成果和认识,分析总结了雪鸡坪矿区成矿特征:成矿主要受断裂构造控制,并与斑岩体特征、围岩性质及热液蚀变作用关系密切;总体矿化弱,主要金属矿物为黄铜矿、黄铁矿;矿体呈大小不等的透镜状,稳定性和连续性较差;Cu品位低,具斑岩型铜矿典型特征。指出了矿区(矿床)找矿目标和方向:蚀变齐全的中—中酸性超浅成-浅成斑岩体为找矿目标;矿体露头、铁帽、孔雀石、铜兰、铅华、钼华等标型矿物及氧化淋漓带为找矿标志;矿床中深部和边缘为主要找矿方向,Mo、Se等有益组分的研究和综合利用也是"找矿"的重要内容。

On the basis of the results of complementary exploration to III and IV orebodies, the mineralizing characteristics of Xuejiping deposit are summarized. These characteristics are that 1 ） mineralization are mainly controlled by fault structures and closely related with porphyry character, host rock properties and hydrothermal erosion, 2） in general, mineralizing is not strong with main metal minerals of chalcopyrite and pyrite,3） orebodies are long or short lens shapes with poor stability and continuity,4） and the copper grade is low and has typical character of porphyry copper ore. The objectives and direction for exploration is pointed out. The porphyry rocks with intensive intrusion, neutral-to-acid and extraordinary supergene to supergene are the prospecting objectives. Therefore, many minerals and oxidative eluvial horizons, such as slovan, gossan, malachite, covellite, masicotite, molybdite etc. , may be the signs for exploration, and middle- to-deep or peripheral regions may be direction for further exploration. Some useful elements such as Mo, Se etc. , may also be important for exploration.