粤北新洲地区推覆断裂系统中的碎裂钠长石岩型金矿床  

THE CATACLASTIC ALBITE-ROCK TYPED GOLD DEPOSIT IN THE THRUST-NAPPE FAULT SYSTEM IN XINZHOU AREA OF THE NORTHERN GUANGDONG PROVINCE

作　　者：彭少梅[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学开放实验室

出　　处：《地质找矿论丛》1991年第4期40-51,共12页Contributions to Geology and Mineral Resources Research

摘　　要：在粤北新洲褶皱式逆冲推覆构造的断裂系统中,除已完成勘探评价的新洲中型碎裂石英脉型金矿床外,最近发现一种新的金矿床类型——碎裂钠长石岩型金矿床。金矿体直接产于受Ⅱ级逆冲推覆剪切带(尤其是下盘高角度推覆剪切带)控制的钠质蚀变岩脉带的碎裂钠长石岩区段内。它是自加里东期低级绿片岩相变质作用,印支期韧性推覆剪切至燕山期脆性剪切叠加混合岩化作用,使围岩中的金和地壳深部的金反复多次活化、富集而成的中高温热液矿床。这一新的发现,对我国金矿尤其是剪切带型金矿的找矿勘探,具有较重要的启迪和指导意义。After the discovery of the cataclastic quartz vein type of gold deposit a new type of the cataclasticalbite-rock typed gold deposit is recently found in the thrust-nappe fault system in Xinzhou Area,Northern Guangdong Province. Ore bodies directly controled by high angle thrust nappe shear zone isthe commercial ore. This gold beposit is of meso-high temperature deposit. Gold is from the lowercrust and the wall rock, mobilized, remobilized by Caledonian green schist-phased metamorphism, In-dosinian ductile thrust nappe, Yanshanian britlle shearing which is superposed by minmatization, at lastenriched to form gold deposit. The finding will give enlightment to exploration geologist, especyially tosearchimg for gold deposits in shear zone.

关 键 词：粤北 断裂 推覆构造 金矿 纳长石 

分 类 号：P618.510.2[天文地球—矿床学]