滇西北衙金多金属矿集区构造控矿作用及深边部找矿潜力--以万硐山矿区为例  

Structural ore control in Beiya gold polymetallic high ore concentration area,West Yunnan,and prospecting potentials in the deep part and peripherals-A case study of Wandongshan District

作　　者：周癸武 李其在 张长青[2] 郑瑜林 周晗星 杨世珍 牛学永 Zhou Guiwu;Li Qizai;Zhang Changqing;Zheng Yulin;Zhou Hanxing;Yang Shizhen;Niu Xueyong(Yunnan Gold Mining Group Co.,Ltd.;Institute of Mineral Resources,Chinese Academy of Geological Sciences)

机构地区：[1]云南黄金矿业集团股份有限公司 [2]中国地质科学院矿产资源研究所

出　　处：《黄金》2022年第8期15-22,26,共9页Gold

基　　金：中国地质调查局项目(DD20160124);云南黄金矿业集团股份有限公司找矿项目(资源202104)。

摘　　要：北衙金多金属矿集区夹持于金沙江—红河断裂、宾川—程海断裂和丽江—木里断裂之间。沿金沙江—红河断裂及其附近侵入大量富碱斑岩,北衙金多金属矿集区位于鹤庆—祥云区富碱斑岩带中。北衙金多金属矿集区构造主应力经历了近东西向→近南北向的转变,近南北向断裂为成矿前构造,近东西向断裂为成矿后构造。万硐山矿区主要断裂有3组,分别为近南北向断裂、近北东向断裂和近东西向断裂。其中,近南北向断裂具有明显的控岩、控矿性质,与万硐山岩体的侵入关系密切。通过对构造与成矿关系的研究,预测沿F_(6)断裂及其他近南北向断裂深部及矿区边部具有寻找矽卡岩型及构造破碎带型矿体的潜力。层间破碎带、褶皱弯曲及虚脱等部位是找矿的有利部位,近南北向构造与其他方向构造交会部位有利于矿体的形成与富集。北衙金多金属矿集区深部及边部具有寻找斑岩型铜多金属矿床的潜力。Beiya gold polymetallic high ore concentration area is located between Jinshajiang-Honghe,Binchuan-Chenghai and Lijiang-Muli fracture zones.A large amount of alkaline-rich porphyry rock intrudes along Jinshajiang-Honghe fracture and its peripherals.Beiya gold polymetallic high ore concentration area is located in the alkaline-rich porphyry rock zone around Heqing-Xiangyun area.The structural main stress has been through near EW-near SN orientation shifts.Near SN facture is the pre-mineralization structure,near EW fracture is the post-mineralization structure.There are mainly 3 groups of fractures in Wandongshan District,namely the near SN fracture,near NE fracture and near EW fracture.Among them,the near SN fracture has obvious rock control and ore control property,and is closely connected with Wandongshan rock intrusions.Based on the study on the relationship between structures and mineralization,the paper predicts that there are potentials in prospecting skarn type and structural broken zone type ore bodies along F_(6) fracture,deep in its near SN fracture and in the peripherals of the district.The interlayer broken zone,fold bending and collapse sections are all favorable parts for prospecting.The intersection of near SN structure and structures trending in other directions are conducive to ore body formation and enrichment.There are potentials in prospecting porphyry copper polymetallic deposits in deep part and the peripherals of Beiya gold polymetallic high ore concentration area.

关 键 词：近南北向断裂 找矿潜力 深部 万硐山矿区 北衙金多金属矿集区 

分 类 号：TD15[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]