| 敦煌地块钠长碎裂岩型金矿床的地质特征 |
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| 引用本文： | 李生濂.敦煌地块钠长碎裂岩型金矿床的地质特征[J].铀矿地质,1994(4). |
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| 作者姓名： | 李生濂 |
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| 作者单位： | 甘肃武威核工业西北地勘局２１２大队 |
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| 摘 要： | 敦煌地块东段前长城系敦煌群是该台块最古老的结晶基底，为一套绿岩建造。金矿床赋存于敦煌群顶部第四岩组火山岩和稍晚的基性斜长角门石岩被强烈钠交代而形成的钠长岩体内，并严格受控于脆－韧性剪切带。与金矿化有关的钠交代原岩有基性侵入岩、中酸性火山岩、花岗岩（可能有）等，但其最终交代产物均为钠长岩和石英脉组合，为一种特殊的金矿类型。
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| 关 键 词： | 敦煌群绿岩，钠长岩，脆－韧性剪切带，金矿类型 |
GEOLOGICAL CHARACTERISTICS OF ALBITE CATACLASTIC ROCK-TYPE GOLD DEPOSIT IN DUNHUANG BLOCK |
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| Li Shenglian.GEOLOGICAL CHARACTERISTICS OF ALBITE CATACLASTIC ROCK-TYPE GOLD DEPOSIT IN DUNHUANG BLOCK[J].Uranium Geology,1994(4). |
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| Authors: | Li Shenglian |
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| Abstract: | Pre-Changcheng System Dunhuang Group in the eastern section of Dunhuang Block isthe oldest crystalline basement in that plate form block,which consists of a suit of greestoneformation. Gold deposits occur in albite massif which was formed by the strong soldiummetasomatism of the fourth member of volcanic rocks at the top of Dunhuang Group and thelater basic plagioclase amphibolite and are strictly controlled by brittle-ductile shear zone.The original rocks of the sodium metasomatite associated with gold mineralization comprisebasic intrusive rocks, intermediate-acidic volcanic rocks, perhaps also granites etc.But theirfinal metasomatic products all are represented by the combination of albitite and quartz vein.So this type of gold deposit is considered to be a special one. |
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| Keywords: | Dunhuang Group greenstone Albitite Brittle-ductile shear zone Gold deposit type |
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