摘要
甲马铜多金属矿床各类矿石中金含量普遍较高。层状主矿体中金主要以细小的自然金形式包裹于斑铜矿和黝铜矿中。矿区多底沟组大理岩 (层状主矿体顶板 )中的构造破碎带内有独立金矿(化 )体产出。喜山期中酸性、酸性岩脉也有不同程度的金矿化。不同产状金矿化特征、矿石w(Au) /w(Ag)比值等综合分析后认为 :甲马矿区存在两期金矿化 。
Gold content in various types of ores is high in Jiama deposit, Tibet. Gold in stratiform major orebody is mainly included in bornite and tetrahedrite as fine grain of native gold. Independent gold orebody or mineralization can be found in structural fracture zones in marble of the Duodigou formation, which overlies stratiform major orebody. Acid and middle-acid dykes of Himalaya period are mineralized. The evidence both from gold mineralization in different occurrence and value of Au/Ag in various ores indicate that Jiama deposit was undergone two stages of gold mineralization. One was caused by submarine sedimentation-exhalation in the Yanshania period. The other is closely relative to magmatism in the Himalaya period.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2002年第3期225-228,共4页
Journal of Jilin University：Earth Science Edition
基金
吉林大学青年教师基金资助项目 (2 0 0 0 )
