Studies of Metamorphic Vein in Ultrahigh-Pressure Rocks
详细信息
- 责任者：Sheng Yingming (Key Laboratory of Crust-Mantle Materials and Environments ; CAS ; School of Earth and Space Sciences ; University of Science and Technology of China ; Hefei 230026 ; China) ; Zheng Yongfei
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(2)
- 关键词：岩脉 ; dikes ; 超高压变质作用 ; ultrahigh pressure metamorphism
- 页码：p.490-500
- 图表：10 illus., 96 refs.
- 分类号：0802
- 出版序号：20120186
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Metamorphic veins enclosed in ultrahigh-pressure rocks provide an unique opportunity to trace fluid activity during continental subduction. High-ultrahigh pressure rocks may contain “pure” quartz-vein (quartz content ＞98%), and variably complicated polymineral “impure” vein. Recent studies show that these metamorphic veins can be used to improve the understanding of fluid/melt nature and element transfer in continental collision zones. At present, the main scientific questions include: 1) identifying the fluid/melt nature that formed the variable metamorphic veins; 2) obtaining the ability and scale of major and trace element transfer (especially for the fluid-immobile HREE and HFSE) during veining,and investigating the difference in fluid/melt nature affects on the element geochemical behavior under UHP metamorphic conditions; and 3) acquiring the exact timing of veining.