西藏帮浦斑岩—矽卡岩型铜钼铅锌矿床地质特征分析

西藏帮浦铜钼多金属矿床是冈底斯带重要的多金属矿床之一,根据野外调查以及室内分析工作总结,从矿区相关地层、岩浆岩、断裂构造及控矿构造、围岩蚀变等方面分析该矿床地质特征。西藏帮浦矿床属斑岩型—矽卡岩型复合矿床,由斑岩体内接触带细脉浸染型铜钼矿化体和接触带外侧灰岩地层中脉状铜铅锌矿化体构成。中二叠统洛巴堆组地层(P1l)是矿区内的主要赋矿层位。F1断裂是矿区的主要控矿容矿构造。在中新世后碰撞伸展构造环境下,帮浦一带大量的二长花岗斑岩、闪长玢岩侵入及后期构造作用和岩浆期后含矿热液作用是成矿关键。

Geologic Characteristic Analysis Of Porphyry-Skarn Copper Molybdenum Pb-Zn Deposits In BangPu Region Of Tibet

Tibet BangPu copper molybdenum polymetallic deposit is one of the most important polymetallic deposit in Gangdisi belt,Based on field surveys and laboratory analysis ,this paper detailed analysis the geology of the ore deposit from the aspect of related stratigraphy , Magmatite, fracture structure and ore controlling structure, wall rock alteration.This work is significant for ore prospecting in the future. Tibet BangPu deposit is Porphyry-Skarn composite deposit,which constitutes of Cu-Mo mineralization body of veinlet disseminated type body in porphyry body contact zone and vein Cu- Pb -Zn mineralization body in limestone Strata on the outside of contact zone. The Luobadui group of middle permian is a major host strata within the mining area. The F1 is the main ore controlling structures in this mining area. It is the key factors that a lot of monzonitic granite-porphyry and dioritic porphyrite intrude Tibet BangPu zone and the structural effect in the late stage and post-magmatic hydrothermal ore-deposit in the environment of collisional extensional tectonic after Miocene.