黄金科学技术 ›› 2021, Vol. 29 ›› Issue (2): 173-183.doi: 10.11872/j.issn.1005-2518.2021.02.039
• 矿产勘查与资源评价 •
摘要:
前红泉金矿位于甘肃北山造山带南部,是新近发现的金矿床,其成矿时代缺乏准确约束。通过对该矿床矿石中蚀变绢云母进行40Ar-39Ar测年工作,获得蚀变绢云母40Ar-39Ar坪年龄为(250.4±1.0)Ma,正等时线年龄为(251.3±1.1)Ma,表明其成矿时代为早三叠世。前红泉金矿与北山南带众多金属矿床成矿时代相当,具相似的成矿地质背景。综合前人研究成果,认为三叠纪是北山地区一次大规模金属矿床成矿期,造山后伸展阶段是大量金属矿产产出的有利大地构造背景。
中图分类号:
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