地学前缘 ›› 2011, Vol. 18 ›› Issue (2): 151-157.

• 论文 • 上一篇    下一篇

柴北缘沙柳河地区洋壳超高压变质单元中异剥钙榴岩的发现及其地质意义

张贵宾，张立飞   

  1. 造山带与地壳演化教育部重点实验室; 北京大学 地球与空间科学学院， 北京 100871
  • 收稿日期:2011-02-11 修回日期:2011-03-01 出版日期:2011-03-15 发布日期:2011-04-15
  • 作者简介:张贵宾（1979—），男，博士，讲师，岩石地球化学专业。E-mail：gbzhang@pku.edu.cn
  • 基金资助:

    国家重点基础研究发展计划“973”项目（2009CB825007）；国家自然科学基金项目（40802016，41090371）

Rodingite from oceanic lithology of Shaliuhe terrane in North Qaidam UHPM belt and its geological implication

  1. Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education; School of Earth and Space Sciences, Peking University, Beijing 100871, China
  • Received:2011-02-11 Revised:2011-03-01 Online:2011-03-15 Published:2011-04-15

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摘要：

在柴北缘超高压变质带东端的沙柳河地区蛇绿岩剖面中，首次发现了与蛇纹石化方辉橄榄岩共生的异剥钙榴岩。该异剥钙榴岩主要由钙铝榴石、透辉石、绿泥石、碳酸盐及少量葡萄石和黝帘石组成。异剥钙榴岩通常被认为是洋底变质作用的标志性产物。因此，此异剥钙榴岩的确定，为柴北缘超高压变质带曾经存在过洋壳俯冲提供了又一证据。

关键词: 关键词：异剥钙榴岩, 洋壳俯冲, 柴北缘超高压变质带

Abstract:

Rodingite, coexisting with serpentinized harzburgite, was found in the Shaliuhe ophiolite sequence, North Qaidam UHPM belt. It is mainly composed of grossular, dioposide, chlorite, carbonate and minor prehnite, zoisite. Rodingite is a typical product of oceanfloor metamorphism. The Shaliuhe rodingite is the second evidence for the oceanic subduction in North Qaidam UHPM belt.

Key words:  rodingite, oceanic subduction, North Qaidam UHPM belt

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