黄金科学技术 ›› 2022, Vol. 30 ›› Issue (4): 483-497.doi: 10.11872/j.issn.1005-2518.2022.04.177
• 矿产勘查与资源评价 • 下一篇
刘永乐(),张爱奎,刘智刚,孙非非,何书跃,张大明,奎明娟,张建平
Yongle LIU(),Aikui ZHANG,Zhigang LIU,Feifei SUN,Shuyue HE,Daming ZHANG,Mingjuan KUI,Jianping ZHANG
摘要:
青海东昆仑西段地质构造复杂,岩浆活动频繁,成矿条件极为优越。在梳理国内外金矿分类的基础上,开展了东昆仑西段金矿成因类型厘定和主要类型金矿成矿模式的研究。结果表明:研究区金矿成因类型有造山型、接触交代型、岩浆期后中低温热液型和机械沉积型,造山型金矿是区内最为重要的矿床类型。金矿成矿模式表现为:三叠纪碰撞—后碰撞阶段,区域壳幔相互作用强烈,形成幔壳源花岗岩及与其有关的金矿成矿系统。主要金矿类型有接触交代型和岩浆期后中低温热液型,分别产于岩体外接触带和岩体顶部;在造山作用下,早期形成的韧性剪切带重复活动,控制了造山型金矿的形成,经历晚古生代—早中生代造山作用以后,区域持续处于陆内发展(盆山转换),山脉强烈隆升,在新生代形成砂金矿。
中图分类号:
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