青海省祁漫塔格地区主要成矿系列与成矿模式  

Main minerogenetic series in the Qimantag area,Qinghai Province and their metallogenic models

作　　者：张爱奎 王建军[2] 刘光莲 马忠元 ZHANG Ai-kui;WANG Jian-jun;LIU Guang-lian;MA Zhong-yuan(The Third Institute of Qinghai Geological Prospecting,Xining 810008,China;Qinghai Geological Survey Institute,Xining 810012,China)

机构地区：[1]青海省第三地质勘查院,青海西宁810008 [2]青海省地质调查院,青海西宁810012

出　　处：《矿物学报》2021年第1期1-22,共22页Acta Mineralogica Sinica

基　　金：青海省科技厅基础研究计划项目(编号:2019-ZJ-7009);青海省科技创新创业人才工程项目(编号:青地三勘[2020]86号)。

摘　　要：祁漫塔格位于青海省东昆仑成矿带西段,区内有色金属、贵金属和非金属矿产资源丰富,矿床类型多样,成矿时代多期,成矿作用复杂,亟需对本区各类矿产进行区域成矿规律总结,厘定成矿系列,建立成矿模式,指导区域找矿再创新突破。为此,本次研究以成矿系列思想为指导,通过系统分析典型矿床特征,将祁漫塔格地区主要矿产划分为4个成矿系列,即中古代沉积变质型铁-石墨矿成矿系列、奥陶纪喷流沉积型钴-金-铋矿成矿系列、晚志留世-中泥盆世岩浆熔离型镍-铜-钴矿成矿系列、三叠纪斑岩型-矽卡岩型-隐爆角砾岩型-热液型铁-多金属-贵金属成矿系列,并建立了4个系列典型矿床成矿模式;揭示了重大构造事件与成矿的关系,深化了中元古代活动大陆边缘、早古生代大陆裂解、早古生代晚期大陆碰撞-伸展、三叠纪碰撞-伸展等构造体制的成矿规律认识,探讨了三叠纪集中成矿的深部过程。The Qimantag area is located in the western part of the Eastern Kunlun metallogenic belt,Qinghai Province.In this area,a large amount of resources including nonferrous metals,precious metals and nonmetallic minerals are distributed,with various types of deposits,multi-stages of metallogenesis,and complicated metallogenic processes.Therefore,it is urgently needed to summarize the regional metallogenic regularities of all kinds of mineral resources in this area,to determine the metallogenic series,and to establish the metallogenic models,in order to guide the regional ore-prospecting for making innovation and breakthrough of mineral exploration in the area.Thus,under the guidance of the metallogenic series theory,4 kinds of metallogenic series in this area have been basically classifiedbased on the systematic analysis of characteristics of typical deposits.They include the Mesoproterozoic sedimentary-metamorphic type of iron-graphite deposits,Ordovician SEDEX type of cobalt-gold-bismuth deposits,Late Silurian-Middle Devonian magmatic segregation type of nickel-copper-cobalt deposits,and Triassic porphyry-skarn-cryptoexplosion breccia-hydrothermal types of iron-polymetallic-noble metal deposits.The metallogenic modes of these four typical series of deposits have been established.In this study,we have revealed the relationships between major tectonic events and mineralizations,deepened understandings on metallogenic regularities in tectonic settings of the Mesoproterozoic continental margin,the early Paleozoic continental breakup,the continental collision-extension in late period of the early Paleozoic,and the Triassic collision-extension,and explored the interior geological processes in depth for Triassic extensive mineralizations.

关 键 词：成矿系列 成矿模式 中元古代 奥陶纪 晚志留世—中泥盆世 三叠纪 祁漫塔格 青海 

分 类 号：P612[天文地球—矿床学] P617[天文地球—地质学]