云南澜沧老厂多金属矿床矿化结构及成矿模式

Mineralizing Texture and Metallogenic Model of the Laochang Polymetallic Deposit in Lancang,Yunnan

危机矿山深部矿是当前我国矿产勘查与研究的重要对象。基于新的综合研究和地质勘查成果,对澜沧老厂矿区的矿化空间结构和成矿系统特征进行研究。结果表明:矿区的矿体可分为六个矿体群,它们由多时代、多成因、多矿化类型的矿体组成,包括三个与早石炭世火山喷流沉积作用有关的层状铅锌银铜矿体群和三个与喜山期隐伏花岗斑岩有关的脉状铅锌银矿体群和细脉-浸染状钼(铜)矿体群,前者形成于大陆裂谷环境,后者形成于陆内碰撞造山环境;六个矿体群在空间上构成特有的"三层叠三带"的矿化结构。根据矿化特征,提出双系统同位叠加成矿模式,指出矿区深部斑岩Mo(Cu)矿的找矿潜力巨大。

In this century,locating potential ores in depth of has become an important object of mineral exploration and research for critical mines in China. Base on the data of the latest synthesize research and exploration, this paper discussed the spatial texture of mineralization and metallogenic system of the Laochang polymetallic deposit in Lancang. This study indicates that ： the orebodies in Laochang mining area have been divided into six ore clusters which are composed of poly - epoch ,poly - genesis and poly - type orebodies. Three of them are stratabound Pb - Zn - Ag - Cu ore clusters which were related to the early Carboniferous volcano - exhalative sedimentary activity and formed in continental rift setting , and the other three are veined Pb - Zn -Ag ore bodies and veint -disseminated Mo（Cu） ore bodies which were related to Himalayan concealed granite -porphyry in genesis and formed in in- tracontinental collision orogenenesis setting. Six ore clusters constituted a special ＂three layers ＋ three zones＂ mineralizing texture in spatial distribution. According to the mineralize feature, syntopogenic - superposition metallogenic model is proposed, and there is a great exploration potential for porphyry Mo （Cu） deposit in the mining area.