摘要
东准噶尔地区存在与两类花岗岩有关的两个金属成矿系列：与钙碱性花岗岩类有关的铜、金成矿系列和与富碱花岗岩类有关的锡成矿系列。钙碱性花岗岩成因上属造山后陆内断裂深熔型，富碱花岗岩属A型或S型。前者主要形成于华力西中晚期、华力西晚期；后者也主要形成于华力西中晚期、华力西晚期，岩石以富含碱性暗色矿物为特征。与钙碱性花岗岩有关的铜、金成矿系列矿床类型有斑岩型、隐爆角砾岩筒型、夕卡岩型、破碎带碎裂岩型和石英脉型，与富碱花岗岩有关的锡成矿系列矿床类型有锡石-石英脉型、蚀变花岗岩型和富石英云英岩型。斑岩型、隐爆角砾岩筒型铜（金）矿及与A型花岗岩有关的锡矿等新矿床型的存在，为该区钢、金、锡等矿产资源的进一步探寻．提供了重要方向。该区存在十分有利的构造、岩浆成矿条件、广泛发育的蚀变矿化现象和多种多样的矿化类型，地质研究程度和找矿工作程度低．表明该区具有广阔的找矿前景。
There are two granitoid series and two ore--forming metals series closely related to them in eastern Junggar, Xinjiang. The first is the cafe-alkaline granitoid series and the copper and gold ore--forming series closely related to it. The second is the alkali-rich granitoid series and the tin ore--forming series closely related to it. In genetic classification, the calcualkaline granitoid is post-orogenic granite, the alkali--rich granitoid is typical A-type or S-type granite. All of the granites occurred in the Middle-Late or Late Variscan Orogeny. The metals deposits closely related to cafe-alkaline granite are porphyry copper deposit, cryptoexplosion breccia copper deposit, sham or similar--sham copper deposit and cataclastic rock copper deposit as well as porphyry gold deposit and quartz vein gold deposit. The metals deposits related to alkali--rich granite are cassiterite--quartz vein tin deposit, altered granite tin deposit and quartz--rich greisen tin deposit. In the future, it is important to explore the typical copper, gold and tin deposits seriously in eastern Junggar, Xinjiang.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1998年第2期119-127,共9页
Geotectonica et Metallogenia
基金
国家三○五项目!85-902-03-04
96-915-02-06
关键词
花岗岩类
成矿系列
东准噶尔
新疆
Granitoid, ore--forming metals series, eastern Junggar, Xinjiang
