黑龙江省英城子金矿床:后韧性剪切型金矿床

来源期刊：黄金2011年第7期

论文作者：唐铭君 杨言辰 杨兆武 叶松青 杨春成

文章页码：19 - 25

关键词：韧性剪切带； 地质特征； 地球化学特征； 矿床成因； 后韧性剪切型金矿床； 英城子金矿床

Key words：ductile shear belt； geological feature； geochemical feature； genesis of deposit； post-ductile-shear gold deposit； Yingchengzi gold deposit

摘    要：英城子金矿床是小兴安岭—张广才岭成矿带极具代表性的矿床。金矿体呈脉状、透镜状产出于叠加在韧性剪切带之上的脆性断裂带内。矿床地球化学分析表明,容矿的二长花岗岩、流纹岩具有钙碱性系列岩石特征,形成于火山弧和同碰撞构造环境,由原始地幔岩浆演化形成。成矿流体具有中低温中低盐度幔源流体特征,金矿成矿与后韧性剪切变形时期的构造—岩浆—热液活动密切相关,属于后韧性剪切型金矿床。

Abstract: Yingchengzi gold deposit is a representative deposit in Xiaoxing’anling-Zhangguangcailing metallogenic belt.With vein or lentiform shape,the gold orebodies locate in brittle fracture belts,superpositioning over ductile shear belts.The geochemical analysis on the deposit reveals that the ore-bearing adamellite and rhyolite possessed the characteristics of calc-alkali series rock,they formed in volcanic arc and collision structural environment,and evoluted from original mantle magma.The ore-forming fluid had the characteristics of medium-low temperature medium-low salinity mantle fluid.The ore-forming was closely related to the structure-magma-hydrothermal fluid activity in the post-ductile-shear deformation period.Yingchengzi gold deposit is a post-ductile-shear type gold deposit.