摘要
对羊拉铜成矿富集区新发现的斑岩体的地质地球化学特征及其相关的铜多金属矿化进行了研究,认为斑岩形成于同碰撞造山期,属成矿斑岩。与斑岩有关的矿化带从岩体向外可分为蚀变斑岩带、隐爆角砾岩带和脉状矿化带,且矿化逐渐增强。各带的矿物、蚀变及成矿元素组合特点反映成矿物质主要来源于斑岩,成矿类型为斑岩型,成矿时代属于燕山早期。
Geological and geochemical studies of newly-found porphyry bodies and related mineralization in Yangla area show that the porphyry bodies are mineralized ones and were formed in the syn-orogenic period. Three mineralized zones related to the porphyry bodies can be distinguished with mineralization weaker and weaker towards the porphyry bodies: the altered porphyry zone, cryp-toexplosive breccia zone and vein zone. Assemblages of minerals and metallogenetic elements and characteristics of alteration show that metallic substances were originated from the porphyry bodies, so the studied copper-polymetallic deposits are porphyry type and were formed during the early Yanshanian Period.
出处
《华南地质与矿产》
CAS
1999年第2期1-8,共8页
Geology and Mineral Resources of South China
基金
地质矿产部"九五"科技与环境攻关项目"金沙江结合带构造演化及铜
金矿成矿规律研究"(95-02-001-03)的部分成果
关键词
斑岩
隐爆角砾岩
脉状矿化带
成矿作用
铜矿床
矿床地质
porphyry bodies cryptoexplosive breccia vein mineralized zone Yangla area western Yunnan
