首页> 中文期刊>河南科学 >韧性剪切带中金成矿地质构造解析方法及找矿预测--以卡拉麦里大断裂带金矿为例

韧性剪切带中金成矿地质构造解析方法及找矿预测--以卡拉麦里大断裂带金矿为例

     

摘要

韧性剪切带是地壳中深层次呈带状展布的高应变的韧性断层。韧性剪切带型金矿是一种非常重要的金矿床类型。以卡拉麦里断裂带附近发现的与韧性剪切带型相关的金矿床(金矿点)为研究对象,解剖了韧性剪切带的成矿特征研究,主要从剪切带的构造成因机制、组构特征、剪切带的变形与成矿的关系、金矿与剪切带的关系、成矿模式与成矿预测做了一个深入的分析。大型深剪切断裂应变特征和构造演化控制着金的成矿作用,成矿流体具有多源性,构造叠加和区域构造转换在剪切带长期演化过程中,使得成矿作用具有多期性和复杂性,多种有利累加效应使得成矿作用规模不断提高,从而形成大型剪切金矿带或金矿集中区。%Ductile shear zone are toughness fault in the crust with deep zonal distribution and high strain. The ductile shear zone gold deposit is an important type of gold deposit. Taking Kalamaili-fault gold deposits(ore point)related to ductile shear zone type as object,we studied the metallogenic characteristics of ductile shear zone, mainly from the structure of shear band formation mechanism,the characteristics of fabric,the relationship between deformation and mineralization of shear zone,and the relationship among shear zone,ore-forming model and metallogenic prediction. The strain characteristics and tectonic evolution of large deep shear fracture controlled the gold mineralization. The ore-forming fluid has the polyphyly,and the structural superposition and regional tectonic transformation in the shear zone long-term evolution process,lead to multiphase mineralization and complexity. The variety of the cumulative effect makes mineralization scale increasing,forming a large shear belt or gold clusters.

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