云南北衙金矿万硐山脉型金矿体特征及成因  

THE FEATURE AND GENESIS OF WANDONGSHAN VEINED AU OREBODY OF BEIYA AU DEPOSIT,YUNNAN

作　　者：王绍波[1] 牛学永 WANG Shao-bo;NlU Xue-shui(Yunnan Au company（Ltd）,Yunnan Au Mining Group,Kunming 65022)

机构地区：[1]云南黄金矿业集团股份有限公司,云南昆明650224

出　　处：《云南地质》2018年第3期298-302,共5页Yunnan Geology

摘　　要：云南北衙金矿,根据其矿体的赋存部位、控矿因素和产出特征可划分为五种类型的矿体,本文仅对分布于万硐山石英正长斑岩体围岩中三叠统北衙组(T2b)碳酸盐岩中的脉型金矿体特征及成因进行讨论。该类型金矿体主要沿中三叠统北衙组碳酸盐岩及岩体内的节理、裂隙带充填,形成脉状、树枝状和不规则囊状矿体;矿体产状与节理、裂隙产状一致,规模小,但品位较高,大多成群出现。由于矿区内富碱岩浆的侵入活动,加之构造作用,导致含矿热液上升运移,在北衙组碳酸盐岩节理、裂隙带中热液充填(交代),形成型脉状金矿床。According to the occurrence position, factor of ore control and occurrence feature, Beiya Au deposit, Yunnan can be divided into 5 types of orebody. In this paper, we ogenesis of veined Au orebody in Middle Triassic Beiya Formation （ T2b） carbonatite in Wandongslian quartz sye-nite porphyry wall rock. It mainly fills in the joint, fissure in vein, branch and irreorebody occurrence is consistent with that of the joint and fissure,in small scale, grade high, mostly in group appearance. Because of the intrusion of alkali-rich magma and structure process in the areheat liquid rise and migration,filling （ metasomatism） and forming the veined Au deposit in joint and fissure of Beiya Formation carbonatite.

关 键 词：构造控矿 充填-交代 热液型脉状矿床 云南北衙 

分 类 号：P618.51[天文地球—矿床学]