甘肃岷县寨上金矿床构造控矿特征及找矿预测

来源期刊：黄金2010年第9期

论文作者：喻万强 刘纲 王建国 王晓军 王治华 牛翠祎

文章页码：15 - 20

关键词：寨上金矿床； 控矿规律； 控矿模式； 找矿预测

Key words：Zhaishang gold deposit； ore-controlling regularity； ore-controlling model； ore-prospecting prediction

摘    要：通过系统的路线调查和详细的矿区地质填图,认为寨上金矿区构造格架是由区域性断裂(F₁、F₁₀)、主干断裂(F₃、F₅、轴面断裂、F₈、F₉)、容矿断裂(矿脉)三者围绕扎麻树背斜核部形成一个规模逐渐降低的断裂构造成矿系统。成矿前为左旋压扭性应力场,背斜发生二次变形,同时配套形成主干断裂和左行斜列分布的容矿断裂;成矿期为右旋张扭性应力场,形成右行斜列矿体和单个矿体向西侧伏。依据构造控矿特征对矿区和外围下一步的找矿提出了明确的方向。

Abstract: Based on the systematically geologic route survey and detailed geologic mapping,it is believed that the structural framework of Zhaishang gold deposit is a scale-diminishing structural ore-forming system,which comprised regional faults(F₁,F₁₀),major faults(F₃,F₅,axial-plane fault,F₈,F₉) and host faults(ore veins) around the core of the Zhamashu anticline.Under the left-hand compression-shear stress field,the anticline deformed again,the major faults and the left-lateral host faults formed simultaneously before mineralization.During the mineralization period,the ore-bodies in dextral array came into being due to dextral compression-shear stress field and the single ore-body pitched westwards.According to the structurally ore-controlling characteristic,the direction for farther prospecting in the mining district and its periphery was put forward clearly.