云南北衙富碱斑岩体特征与成矿关系  

On characteristics of alkali rich porphyry with relationship of mineralization in Beiya of Yunnan

作　　者：左琼华[1] 朱婉明[1] 杨加庆[1] 赵蓓蕾[1] 徐永全[1] 王文贤[1] 

机构地区：[1]云南国土资源职业学院,云南昆明650217

出　　处：《地质学刊》2013年第1期102-109,共8页Journal of Geology

摘　　要：北衙富碱斑岩体分布在北衙向斜两翼,其展布主要受北北东、北北西及东西向3组断裂控制,绝大部分呈南北走向,平面上呈脉状,剖面上呈钟状、脉状,局部透镜状,向深部有膨大相连趋势,北衙金多金属矿化分布主要与近南北向的富碱斑岩体关系密切,矿化主要发生在岩体与三叠系中统北衙组(T2b3—T2b5)灰岩的接触破碎带及灰岩层间构造破碎带中。通过对大量钻探资料的分析研究认为,北衙金多金属矿床及其成矿物质主要来自于富碱斑岩体中的石英正长斑岩,属于富碱斑岩-热液型金多金属矿床。Beiya alkali rich porphyrite was spread along the two wings of Beiya syncline, controlled by three sets of fractures with NNE, NNW and EW strikes, trending southeastward, showing veined on plane and bell shape, veined and locally lens-shaped on profile and expanding connected in the deep. Beiya gold polymetallie mineralization distribution was mainly closely related with the alkali rich porphyry of near NS strike, mineralization was occurred between the contact fractured zones of porphyrite and T263-T2b5 limestone as well as the structure fractured zones of interbedded limestone. Based on the analyses of abundant drilling data, the authors deemed that the ore materials of Beiya gold polymetallic deposit were mainly derived from quartz syenite porphyry in alkali rich porphyrite, belonging to an alkali rich porphyrite-thermal gold polymetallic deposit.

关 键 词：金矿 富碱斑岩 成矿作用 云南北衙 

分 类 号：P588.12[天文地球—岩石学]