榴辉岩形成过程中石榴石生长的实验研究

周文戈; 谢鸿森; 赵志丹; 郭捷; 徐济安; 白武明

doi:10.11858/gywlxb.1999.04.001

榴辉岩形成过程中石榴石生长的实验研究

doi: 10.11858/gywlxb.1999.04.001

1.
中国科学院地球化学研究所深部室，贵州贵阳 550002；
2.
中国地质大学（北京）地矿系岩石系，北京 100083；
3.
台北中央研究院地球科学研究所，台湾台北 11529；
4.
中国科学院地球物理研究所地球动力学开放实验室，北京 100101

详细信息

通讯作者:
周文戈

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出版历程
- 收稿日期: 1998-12-11
- 修回日期: 1999-06-03
- 发布日期: 1999-12-05

Experimental Investigation on the Garnet Growth during the Metamorphism of Eclogite Facies

1.
Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
2.
China University of Geosciences (Beijing), Beijing 100083, China;
3.
Institute of Earth Sciences, Academia Sinica, Taipei 11529, China;
4.
Institute of Geophysics, Chinese Academy of Sciences, Beijing 100101, China

More Information

Corresponding author: ZHOU Wen-Ge

摘要

摘要: 在2.0～3.0 GPa、860～980 ℃、加温时间0.57～13.07 h的条件下，研究了粗面玄武岩、安山岩榴辉岩相变过程中的石榴石生长。这一过程中的石榴生长为正常晶体生长。石榴石粒径随时间而增大，其生长速率随粒径增大而减小。粗面玄武岩榴辉岩相变过程中的石榴石生长速率大于安山岩榴辉岩相变过程中的石榴石生长速率，实验样品的初始化学成分及挥发份含量的不同造成了这一差别。在变质作用初期，界面是控制晶体生长的主要因素。
- 粗面玄武岩 /
- 安山岩 /
- 榴辉岩 /
- 变质作用 /
- 石榴石生长
Abstract: The grain growth kinetics of the garnet during the transformation of trachybasalt and andesite to eclogite has been investigated at 2.0～3.0 GPa. The experimental samples were annealed at temperatures of 860 ℃, 870 ℃and 980 ℃ for 0.57 to 13 h. The grain size was determined optically. The normal grain growth of the garnet during the metamorphism of eclogite facies was observed. The grain growth of the garnet increases with increasing annealing time. The rate of the garnet growth decreases with increasing the grain size. However, the rate of the garnet growth during the trachybasalt-eclogite transformation is more rapid than that of the garnet growth during the andesite-eclogite transformation. This phenomenon is attributed to the differences of the chemical compositions and the volatile contents between the trachybasalt and the andesite. In the early stage of the metamorphism of the eclogite facies, the interface-controlled mechanism dominates in the garnet growth.
- trachybasalt /
- adesite /
- eclogite /
- metamorphism /
- garnet growth

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参考文献(26)

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