【作者】 李永森；

【导师】 徐晓春；

【作者基本信息】 合肥工业大学 ， 矿床学， 2002， 硕士

【摘要】 云南澜沧江中南段地处我国云南省西部，青藏高原东部。从构造上看，本区属于特提斯喜-马拉雅构造域，三江褶皱系，澜沧江断裂褶皱带。 研究区内地质构造复杂，铜(多金属)矿床成矿类型多样。本文通过对云南澜沧江中南段火山-侵入岩带东部、兰坪-思茅盆地西侧自兰坪到景洪(自北向南)的科登涧、金满、水泄、宋家坡、大平掌等五个代表性矿床的综合研究，并参考前人勘查和研究成果及资料，概括性地总结了诸矿床的地质地球化学特征，初步得出一些基本的结论：研究区不同地质历史时期处于不同的地质构造背景，所形成的铜矿床类型各不相同；宋家坡铜矿为斑岩型铜矿床，成矿流体和成矿金属元素主要来源于矿区分布的三叠系火山-次火山岩，受后期构造运动的影响和改造；金满、水泄和科登涧矿床属于热液型脉状铜矿床，成矿流体主要来源于盆地卤水或大气降水，部分来源于地壳深部或地幔，成矿金属元素具多源性，成矿受断裂控制，矿床形成较晚，主要为喜山期；而大平掌铜矿床属于典型的块状硫化物型，成矿主要受石炭纪海相火山作用控制。 文章在综合分析、比较各矿床的矿床地质和地球化学特征的基础上，还结合了研究区的地质背景资料，研究了前人的成果和认识，初步分析了区域不同类型铜矿床的形成机制，探索性地提出了各类型铜矿床的成矿模型，以期为该区的找矿勘探和矿产开发提供理论依据。更多还原

【Abstract】 The Lancangjiang river is located in the west of Yunnan province and the southeast of Qingzang plateau. Seen from the structure,this district belongs to the structure region of Tethys-Himalayas,"Sanjiang" fold system,and the fracture-fold zone of Lancangjiang river.The geological structure of this area is complex and the types of the copper (polymetallic) deposits are plentiful. This paper draws conclusions from the studies on five typical deposits which are distributed in the west of Lanping-Simao basin. These conclusions are as follows:the types of copper deposits are different because the geological backgrounds of this area in different period are different;Songjiapo copper deposit belongs to a typical porphyry deposit,its mineral liquid mainly come from the magma that formed the Triassic eruptive rocks and effected by the subsequent geological action;Jinman copper deposit,Shuixie copper deposit and Kedengjian copper deposit are the hydrothermal type. Their mineralization liquids mainly come from the deep of the earth’s crust or from the earth’s mantle,and their mineralizations are constrained by fracture structure,the deposits mainly formed in Himalayanism;but the Dapingzhang deposit is a typical volcanic hosted massive sulfide deposits and its mineralization is manipulated by the Carboniferous eruptive magmatism.This paper makes systematic studies on geochemical characteristics and the geological background. To give a theoretical evidence to better explore and exploit these copper resources in this area,this paper elementarily analyses the mechanic of mineralization and put forward a model of mineralization.更多还原