云南金平长安金矿床地质特征及成矿规律  

Geological characteristics and metallogenic regularity of Chang'an gold deposit in Jinping of Yunnan

作　　者：王利东[1] 周云满[1] 余红平[1] 

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：《矿产与地质》2014年第4期466-472,共7页Mineral Resources and Geology

摘　　要：长安金矿是近年来在哀牢山金矿带发现的另一种独特类型的金矿床。通过对前人研究成果和新获得的深边部勘查资料的综合研究,认为长安金矿主矿体呈似层状、透镜状,向NE陡倾产于NNW向的F6断层破碎带东亚带砂泥质构造岩中,矿体走向及倾向上具有膨大缩小、舒缓波状变化特征;F6断裂为最主要的控矿构造;断层破碎带东亚带中砂泥质碎裂岩、角砾岩金矿化较强,西亚带白云质构造岩金矿化微弱;喜山期辉绿岩、煌斑岩、正长斑岩、细晶正长岩等岩浆侵入活动与金成矿关系较为密切,提供了重要成矿流体。砂泥质碎裂岩、角砾岩和侵入岩脉与围岩接触带、断裂交汇处对金成矿有利,受硅化、黄铁矿化、毒砂化等多种蚀变叠加的部位,易形成工业金矿体。The Chang’an gold deposit is another peculiar deposit discovered in Ailaoshan gold metallogenic zone in recent years.Based on a comprehensive study on precedent achievements and the new data collected in depth and edge exploration,the following conclusions are made：the main gold orebodies are in stratoid and lenticular structure and steeply dip to NE,and they occur in the arenaceous politic tectonic rocks of east subzone of NNW-trending F6 shattered fault zone.The alignment and inclination of the orebodies are charac-terized by expansion,contraction and smoothly wave-like variation.F6 fault is the most primary ore-control-ling structure.Gold mineralization of arenaceous politic cataclasite and breccia is intensive in east subzone of shattered fault zone,while gold mineralization of dolomitic tectonic rocks in west subzone is weak.The mag-ma intrusion activities of Himalayan dolerite,lamprophyre,orthophyre and aplite syenite are closely related to gold mineralization,and they provide important ore-forming fluids.Arenaceous politic cataclasite,brecci-a,and contact zone of intrusive rock vein and wall rocks,and fracture intersection are favorable for minerali-zation of gold.In the locations under alteration and superimposition such as silicification,pyritization and ar-senopyritization industrial gold orebodies are easily formed.

关 键 词：长安金矿床 地质特征 控矿因素 成矿规律 

分 类 号：P618.51[天文地球—矿床学]