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Garnet Growth in the Early Stage of Trachybasalt-Eclogite Transformation |
| ZHOU Wen-Ge1;XIE Hong-Sen1;ZHAO Zhi-Dan2;GUO Jie1 |
| 1Laboratory of Geodynamic under High Temperature and Pressure, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002
2Department of Geology, China University of Geosciences, Beijing 100083 |
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| Cite this article: |
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ZHOU Wen-Ge, XIE Hong-Sen, ZHAO Zhi-Dan et al 2001 Chin. Phys. Lett. 18 1500-1503 |
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Abstract Garnet growth in the early stage of trachybasalt-eclogite transformation was observed at 2.0GPa and temperature of 860°C, 940°C and 1020°C for annealing times of 0.66-13.6h. The grain size was determined optically to be increased with increasing annealing time. The growth rate decreased with increasing grain size. The garnet growth law was: G2.46 = 5.65 x 10-15 t exp[-27.40 x 103/RT], where G represents the average grain size after annealing time t, R is gas constant and T is absolute temperature.
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| Keywords:
61.50.Ks
81.30.Hd
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Published: 01 November 2001
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| PACS: |
61.50.Ks
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(Crystallographic aspects of phase transformations; pressure effects)
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81.30.Hd
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(Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder)
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