甘肃阳山金矿带矿床地质特征、控矿因素及找矿标志  

Geological characteristics,ore-controlling factors and prospecting indicators in Yangshan gold belt of Gansu

作　　者：许磊[1,2] 刘永团 XU Lei;LIU Yong-tuan(China University ofGeosciences（Beijing） ,Beijing 100083;Inner Mongolia Research Institute of Mineral Resources, Hohhot 010031;The Inner Mongolia Autonomous Region Bureau of Geology and Mineral Exploration and Development, Hohhot 010011)

机构地区：[1]中国地质大学(北京),北京100083 [2]内蒙古自治区矿产实验研究所,呼和浩特010031 [3]内蒙古自治区地质矿产勘查开发局,呼和浩特010011

出　　处：《矿产勘查》2018年第2期266-272,共7页Mineral Exploration

基　　金：中国地质调查局甘肃省文县阳山金矿带深部矿产远景调查(编号:12120114038301)资助

摘　　要：阳山金矿带全长超过30 km,其中安坝矿段为金矿集中区。为了进一步扩大阳山金矿带资源量,通过总结安坝矿段成矿地质背景、矿床地质特征,厘定了阳山金矿带的控矿因素及找矿标志,研究表明:(1)安坝矿段主要含矿地层为中泥盆统三河口群千枚岩。(2)观音坝断裂及其次级断裂为主要的控矿断裂,严格控制矿体的空间展布及产出形态。(3)强烈的硅化、黄铁矿化等围岩蚀变特征是寻找金矿床的直接标志。(4)区内金元素异常明显为矿致异常,为矿区最直接的找矿标志。The Yangshan gold belt strikes more than 30 km in long,on which Anba gold section is a concentrated area of gold deposits. In order to enlarge the resources of Yangshan gold belt,we researched and confirmed the ore-ontrolling factors and prospecting indicators of Yangshan gold section by anglizing and summarizing its geological background,and geological features in this paper.The result of our research shows that：（1） The main ore bearing strata of Anba section locates in the phyllite of Devonian Sanhekou group.（2） Guanyinba fault and its secondary faults are the main ore controlling faults which strictly control the spatial distribution and occurrence of the orebodies.（3） The strong alteration of the surrounding rocks such as silicification and mineralization of pyrite is the direct indicator for finding gold deposits.（4）The gold element anomalies in this section obveriously are mineal anomalies.

关 键 词：阳山金矿带 安坝 找矿标志 甘肃 

分 类 号：P618.51[天文地球—矿床学]