| 氧分压对橄榄石单晶体高温蠕变影响的实验研究 |
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| 引用本文： | 金振民 Bai,Q. 氧分压对橄榄石单晶体高温蠕变影响的实验研究[J]. 地质科学, 1994, 29(1): 19-28 |
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| 作者姓名： | 金振民 Bai Q |
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| 作者单位： | 1. 中国地质大学矿产系 武汉 430074;2. University of Mineasota, Minneapolis, MN55455 |
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| 基金项目： | 美国自然科学基金,中国自然科学基金 |
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| 摘 要： | 在氧分压10-4-10-10atm,温度1250-1500℃和应力21.5-150MPa条件下,对橄榄石单晶高温蠕变速率与氧分压之间关系进行了系统实验研究。实验结果表明,氧分压大小直接控制了橄榄石高温蠕变速率的变化;橄榄石位错攀移是通过氧空位点缺陷扩散作用而完成的;橄榄石[110]69,[101]6和[011]6不同结晶学方向具有不同流变强度和氧分压指数。
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| 关 键 词： | 氧分压 橄榄石 高温蠕变 点缺陷 上地幔 |
| 收稿时间： | 1993-03-01 |
| 修稿时间： | 1993-03-01; |
EXPERIMENTAL STUDY ON THE EFFECT OF OXYGEN PARTIAL PRESSURE ON HIGH-TEMPERATURE CREEP OF SINGLE OLLVINE CRYSTALS |
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| Jin Zhenmin. EXPERIMENTAL STUDY ON THE EFFECT OF OXYGEN PARTIAL PRESSURE ON HIGH-TEMPERATURE CREEP OF SINGLE OLLVINE CRYSTALS[J]. Chinese Journal of Geology, 1994, 29(1): 19-28 |
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| Authors: | Jin Zhenmin |
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| Affiliation: | 1. China University of Geosciences, Wuhan 430074;2. University of Mineasota, Minneapolis, MN55455 |
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| Abstract: | The relationship between high-temperature creep of olivine and oxygen partial pressure has been studied at temperature of 1250-1500℃ and stress range of 21.5-150MPa in controlled buffered enstatites.The experimental result suggests that oxygen partial pressure directly controls variation of creep late of olivine.Dislocation climb of olivine is closely related to diffusion of vacancy-point defects of olivine. Three crystallographic directions of [011]69[101]6and [110]6 have different rheological strength and exponent of oxygen partial pressure. |
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| Keywords: | Oxygen partial pressure Olivine High-temperature creep Pointdefect Upper mantle |
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