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西藏冈底斯岛弧及其铜多金属矿带的基本特征与远景评估
引用本文:王全海,王保生,等.西藏冈底斯岛弧及其铜多金属矿带的基本特征与远景评估[J].地质通报,2002,21(1):35-40.
作者姓名:王全海  王保生
作者单位:1. 中国地质调查局西南项目办公室,四川成都,610082
2. 西藏地勘局,西藏拉萨,850000
3. 西藏地勘局,西藏拉萨,850000同济大学,上海200092
4. 成都地质矿产研究所,四川成都,610082
5. 同济大学,上海,200092
基金项目:中国地质调查局“西藏一江两河地区成矿规律和找矿方向综合研究”(编号199910200246)
摘    要:冈底斯岛弧带属冈底斯活动大陆边缘的组成部分。带内早自中侏罗世、晚至第三纪的中酸性火山岩以及与雅鲁藏布江结合带有成因联系的Ⅰ型中酸性岛弧陆缘碱性侵入体(40-100Ma)和陆内汇聚造山引起的S型花岗岩体(15-50Ma)广泛发育。研究证实,冈底斯岛弧带属有色金属、贵金属成矿带。主要矿种的矿床类型有:海底火山热液型或火山喷流沉积型(Cu多金属)、海底热水沉积型(Cu、Pb、Zn等)、斑岩型(Cu、Mo)以及接触交代岩浆期后地下水热液充填的复合型(Cu、Pb、Zn)等。这些多期、多阶段复合叠加成矿作用和多种矿床类型的“同带共存”格局,展示了冈底斯岛弧带的巨大找矿潜力。

关 键 词:冈底斯岛弧  成矿远景  铜多金属矿床  成矿作用
文章编号:1671-2552(2002)-01-0035-06
修稿时间:2001年9月28日

Basic features and ore prospect evaluation of the Gangdise island arc,Ti bet,and its copper polymetallic ore belt
WANG Quan-hai,WANG Bao-sheng,LI Jin-gao ? YAO Peng,LI Zhi,ZHOU Zu-yi,CHENG Li-jun,LIU Hong-fei.Basic features and ore prospect evaluation of the Gangdise island arc,Ti bet,and its copper polymetallic ore belt[J].Geologcal Bulletin OF China,2002,21(1):35-40.
Authors:WANG Quan-hai  WANG Bao-sheng  LI Jin-gao ? YAO Peng  LI Zhi  ZHOU Zu-yi  CHENG Li-jun  LIU Hong-fei
Abstract:The Gangdise island-arc belt is parallel to the Yarlung Zangbo suture zone.Middle to Tertiary intermediate-acid volcanic rocks,I-type intermediate-acid,island-arc and continental-margin,calc-alka-line intrusions related genetically to the suture and S-type granite formed by intracontinental convergence-orogeny are extensively developed in the Gangdise island-arc belt.This belt is a nonferrous metal and no-ble metal metallogenic belt.The deposit types of main minerals include the submarine volcanic-hydrother-mal type or volcanic exhalation-sedimentary type(Cu polymetallic ore deposits),submarine hydrothermal-sedimentary type(Cu ,Pb,Zn etc.),porphyry type(Cu and Mo )and contact metasomatic and post-magmatic subsurface hydrothermal fluid filling compound type(Cu ,Pb and Zn ).The pattern of the exis-tence of these polyphase and multi-stage telescoping mineralizations and many deposit types in the same belt shows the great ore potentials in the Gangdise island-arc belt.
Keywords:Gangdise island arc  metallogenic belt  ore prospect evaluation
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