摘要
额尔齐斯金矿带是我国阿尔泰地区一条重要的金矿带,成矿地质条件优越,通过对多拉纳萨依、赛都、阿克塔斯和科克萨依4处典型金矿床的对比研究,总结了带内金矿床的基本特征并探讨了其成矿环境,认为在晚古生代造山带后碰撞伸展构造环境下,壳幔混源成因的花岗岩类岩脉为金成矿的主要物质来源,韧性—脆韧性构造变形是成矿的必要条件,韧性剪切—岩浆耦合成矿作用是金矿床成矿的关键,控制着金矿体的形成与产出。
The Irtysh gold metallogenic belt,a key gold mineralization belt in the Altay area,northwestern Xinjiang,is characterized with favorable metallogenic geological conditions.By the comparison study of four gold deposits in the belt,i.e.,Doranasai gold deposit,Saidu gold deposit,Aktas gold deposit and kekesayi gold deposit,this paper summarizes the essential characteristics of this type of gold deposits and discusses ore-forming environment.It is proposed that the intermediate and acid granitoid intrusions and dykes with mixed origins of the crust and mantle in the background of post-collision tectonic extension during the Neopaleozoic period,provided the main sources of ore-forming gold and the ductile brittle-ductile structural deformation are essential conditions for forming gold mineralization.The coupled mineralization process by tectonism and magmatism is the key to form the gold deposit,which control the formation of the gold orebodies and spatial distribution.
出处
《矿产勘查》
2014年第4期578-584,共7页
Mineral Exploration
基金
"十二五"国家科技支撑计划项目(编号:2011BAB06B03-5)
中国地质调查局项目(编号:1212011140062)共同资助
关键词
成矿特征
金矿床
构造-岩浆
额尔齐斯金矿带
metallogenic characteristics
gold deposit
tectonic-magmatic process
Irtysh gold metallogenic belt
