地震地质 ›› 2000, Vol. 22 ›› Issue (s1): 51-.DOI: ISSN:0253-4967.0.2000-S1-008

• 科研简报 • 上一篇    下一篇

查汗萨拉锑、银矿带成矿时代研究

  

  1. 中国科学院地质与地球物理研究所|中国科学技术大学地球和空间科学系
  • 出版日期:2000-12-21 发布日期:2009-11-25
  • 基金资助:

    国家“九五”重点科技攻关项目! (新疆 30 50 4 0 4 )

STUDY ON THE METALLOGENETIC TIMES OF THE CHAHANSALA Sb-Ag ORE BELT

  • Online:2000-12-21 Published:2009-11-25

摘要:

采用常规的4 0 Ar/39Ar定年技术 ,系统地测定了新疆查汗萨拉锑、银矿带 5个矿床(点 )的成矿时代 ,它们的年龄结果不尽相同 ,整体上其成矿时代为燕山期 ,而并非前人提出的“海西期成矿”。年龄测定还表明 ,矿带中、东部的矿床成矿时代为燕山早期 ,西部矿床为燕山晚期 ,空间上呈东早西晚的变化趋势 ,并显示多期次成矿、多矿种的特征。实验证明 :对石英样品进行一些特殊处理 ,并重视对K ,Ca和Cl干扰同位素的校正 ,可获得客观、理想的年龄结果

关键词: 查汗萨拉, 锑银矿带, 成矿时代, 40Ar-39Ar定年, 石英脉

Abstract:

Using the conventional 40Ar- 39Ar age dating technique, the metallogenetic times of five meneral deposits of the Chahansala Sb-Ag ore belt in Xingjiang are systematically determened. Although all values of their ages are not identical, these metallogenetic times as a whole belong to the Yanshanian time rather than the Hercynian time, as suggested by other researchers. Furthermore, age dating results indicate that the metallogenitic epoch in middle and eastern sections of the ore belt belongs to

Key words: Chahansala, Sb-Ag ore belt, Metallogenetic epoch, 40Ar- 39Ar age dating Quartz reef