摘要
新疆阿勒泰南缘赛都金矿是典型的大型韧性剪切带型金矿。采用原位激光剥蚀同位素质谱(LA-ICP-MS)对赛都金矿含金石英脉中锆石定年,获得含金石英脉的形成年龄为310±3Ma,结合前人报道相关年代学资料,表明赛都金矿经历了三期主要构造-热液活动-成矿作用,发生的时间分别是310Ma、290Ma和270Ma左右。这一研究结果不仅准确地确定了赛都金矿的成矿时代和成矿阶段,而且对阿勒泰南缘额尔其斯构造带的演化提供了重要的新资料。
The Saidu large gold deposit in southern Altai is a typical ductile shear zone - type gold deposit. In this paper, a zircon U - Pb age of the gold - bearing quartz veins from this deposit, 303 ± 3 Ma, is obtained with LA - ICP - MS method, which means gold -bearing quartz veins formed in 303 ± 3 Ma. In combination with previously reported geochronological data, we suggest that there existed three main structure- hydrothermal- mineralization stages for this deposit, i. e. , ca. 310 Ma, ca. 290 Ma and ca. 270 Ma. This study not only clearly determines the mineralization age and stages, but also supplies new data for deciphering the tectonic evolu- tion of the Erqisi suture zone in the southern Altai.
出处
《矿产勘查》
2010年第3期229-233,共5页
Mineral Exploration
基金
国家科技支撑计划项目(编号:2007BAB25B01)资助
关键词
阿勒泰赛都金矿
含金石英脉
锆石U—Pb年龄
成矿时代
成矿阶段
Saidu gold deposit in the southern Ahai
gold - bearing quartz veins
zircon LA - ICP - MS U - Pb age
mineralization age and stage
作者简介
[第一作者简介]陈克强，1962年生，男，1983年毕业于新疆工学院，获学士学位，高级工程师，现主要从事地质项目管理工作。
