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DOI | 10.1002/2017GL073070 |
Identical activation volumes of dislocation mobility in the [100](010) and [001](010) slip systems in natural olivine | |
Wang, Lin; Blaha, Stephan; Kawazoe, Takaaki; Miyajima, Nobuyoshi; Katsura, Tomoo | |
2017-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Dislocation recovery experiments were performed on predeformed olivine single crystals at pressures of 2, 7 and 12GPa and a constant temperature of 1650K to determine the pressure dependence of the annihilation rate constants for [100](010) edge dislocation (a dislocation) and [001](010) screw dislocation (c dislocation). The constants of both types of dislocations are comparable within 0.3 orders of magnitude. The activation volumes of a and c dislocations are small and identical within error: 2.70.2 and 2.50.9cm(3)/mol, respectively. These values are slightly larger and smaller than those of Si lattice and grain-boundary diffusions in olivine, respectively. The small and identical activation volumes for the a and c dislocations suggest that the pressure-induced fabric transition is unlikely in the asthenosphere. The decrease in seismic anisotropy with depth down in the asthenosphere may be caused by the fabric transition from A type or B type to AG type with decreasing stress with depth. |
英文关键词 | dislocation recovery olivine fabric pressure dependence slip system seismic anisotropy |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399762700009 |
WOS关键词 | UPPER-MANTLE ; SEISMIC ANISOTROPY ; SINGLE-CRYSTALS ; DEEP MANTLE ; PRESSURE ; CREEP ; TEMPERATURE ; FORSTERITE ; DEFORMATION ; DIFFUSION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25804 |
专题 | 气候变化 |
作者单位 | Univ Bayreuth, Bayer Geoinst, Bayreuth, Germany |
推荐引用方式 GB/T 7714 | Wang, Lin,Blaha, Stephan,Kawazoe, Takaaki,et al. Identical activation volumes of dislocation mobility in the [100](010) and [001](010) slip systems in natural olivine[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(6). |
APA | Wang, Lin,Blaha, Stephan,Kawazoe, Takaaki,Miyajima, Nobuyoshi,&Katsura, Tomoo.(2017).Identical activation volumes of dislocation mobility in the [100](010) and [001](010) slip systems in natural olivine.GEOPHYSICAL RESEARCH LETTERS,44(6). |
MLA | Wang, Lin,et al."Identical activation volumes of dislocation mobility in the [100](010) and [001](010) slip systems in natural olivine".GEOPHYSICAL RESEARCH LETTERS 44.6(2017). |
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