K-Ar Geochronology of the Caledonian Event in the Xuefeng Uplift
- 责任者：Hu Shaoqi (School of Resource and Environment Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Zhu Guang
- 刊名：Geological Review
- 出版年：2010
- 卷期：56(4)
- 关键词：加里东期 ; Caledonian ; 钾—氩计时 ; K-Ar dating ; 扬子地台 ; Yangtze Platform
- 页码：p.490-500
- 图表：4 illus., 1 table, 44 refs.
- 分类号：0300
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
Detailed structural deformation analyses indicate that the Xuefeng Uplift underwent four phases tectono—thermal events, Caledonian, Indosinian, the end of Late Jurassic to the earliest of Early Cretaceous and the end of Early Cretaceous to the earliest of Late Cretaceous, the orientations of the late three phases folds are NWW, NE—NNE and nearly NS, the orientation of Caledonian deformation can not be identified accurately due to the influence of the late deformation overprinting. XRD analysis of the Banxi Group slate in the northern Xuefeng Uplift suggests a lower green-schist facies metamorphism. Caledonian tectono—thermal event indeed taken place in the uplift showed by the K-Ar geochronology of slate illite of the Banxi Group and it happened as earlier as 419 Ma.