中国云南易门式铜矿床的主要类型及成因(英文)  

Major deposit types and genesis of Yimen-type copper deposits, Yunnan, China

作　　者：韩润生[1,2] 邹海俊[1] 刘丛强[3] 马更生[1] 

机构地区：[1]昆明理工大学,有色金属矿产地质调查中心西南地质调查所 [2]中国科学院地球化学研究所矿床地球化学国家开放实验室,贵州贵阳550002 [3]中国科学院地球化学研究所

出　　处：《地质通报》2007年第12期1549-1563,共15页Geological Bulletin of China

基　　金：This study is supported jointly by the funds for Supporting Project for State Science and Technology (No.2006BAB01B09);the Natural Science Foundation of Yunnan Province (No.99D0003G);the Collaboration Program sponsored by the colleges and universities of Yunnan Province (No. 2002UBBEA05B004);the funds for Program for New Century Excellent Talents in University (No.NCET- 04- 917).

摘　　要：系统地概括了易门铜矿田的成矿地质背景及2种矿床类型的地质特征,在此基础上论证了火山热水沉积作用、构造改造作用、岩浆叠加作用、地下热水再造作用与成矿密切相关。易门式铜矿床为"裂谷成矿背景-火山热水沉积-构造改造富集-深源岩浆叠加-地下热水再造"型多因复成矿床,建立了新的成矿模式,为该类矿床深部及外围的找矿预测指明了方向。The Yimen copper deposit is a large-scale copper deposit with exploration indicated the basic reserves and pre-mining reserves of economy of about 0.6 million tonnes with Cu averaging 1.0%. There are two major deposit types in the Yimen copper orefield： one is the volcano-hydrothermal sedimentation-reworking type （the Shishan-type）, while the other is the volcano-hydrothermal sedimentation-strong reworking-magmatic superimposition type （the Fengshan-type）. On the basis of the geological setting of metallogenesis of the Yimen copper orefield and the geological characteristics of the Yimen-type copper deposits, the relations between volcano-hydrothermal sedimentation, tectonic transformation, magmatic superimposition, underground hot water reworking and metaUogenesis is discussed in this paper. It is considered that the ore-forming materials are of diverse sources, and are complex in origin. The homogenization temperatures and salinities of mineral fluid inclusions fall mainly within the two ranges： 110-200℃ and 220-320℃; 20.5wt% and 4-10 wt% and 12-18 wt%. The δ^34S values of minerals （Chalcopyrite, Pyrite, bomite and bismuthinite） vary within the range of - 7.2-20.0‰. The metallogenic model of Yimen-type deposits is the ＂rift metaUogenic setting→olcano-hydrothermal sedimentation→tectonic transformation-enrichment→deep-source magmatic superimposition→underground hot water reworking ＂. The ore-forming model has been established for the dynamics of tectonic ore-forming processes and the exploration of Yimen-type copper ore deposits.

关 键 词：多因复成矿床 成矿模式 矿床地球化学 构造成矿作用 易门式铜矿床 云南 

分 类 号：P618.41[天文地球—矿床学] P611[天文地球—地质学]