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DOI | 10.1029/2019GL085301 |
Sound Velocities in Shock-Synthesized Stishovite to 72 GPa | |
Berryman, Eleanor J.1,2; Winey, J. M.3; Gupta, Yogendra M.3,4; Duffy, Thomas S.1 | |
2019-12-03 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:23页码:13695-13703 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | Stishovite (rutile-type SiO2) is the archetype of dense silicates and may occur in postgarnet eclogitic rocks at lower-mantle conditions. Sound velocities in stishovite are fundamental to understanding its mechanical and thermodynamic behavior at high pressure and temperature. Here, we use plate-impact experiments combined with velocity interferometry to determine the stress, density, and longitudinal sound speed in stishovite formed during shock compression of fused silica at 44 GPa and above. The measured sound speeds range from 12.3(8) km/s at 43.8(8) GPa to 9.8(4) km/s at 72.7(11) GPa. The decrease observed at 64 GPa reflects a decrease in the shear modulus of stishovite, likely due to the onset of melting. By 72 GPa, the measured sound speed agrees with the theoretical bulk sound speed indicating loss of all shear stiffness due to complete melting. Our sound velocity results provide direct evidence for shock-induced melting, in agreement with previous pyrometry data. |
英文关键词 | stishovite fused silica shock sound speed melting plate impact |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000500061600001 |
WOS关键词 | SUBDUCTED BASALTIC CRUST ; HIGH-PRESSURE ; LOWER-MANTLE ; ELASTIC PROPERTIES ; PHASE-TRANSFORMATIONS ; COMPRESSION ; SILICA ; SIO2 ; BOUNDARY ; QUARTZ |
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/225143 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA; 2.Nat Resources Canada, CanmetMINING, Ottawa, ON, Canada; 3.Washington State Univ, Inst Shock Phys, Pullman, WA 99164 USA; 4.Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA |
推荐引用方式 GB/T 7714 | Berryman, Eleanor J.,Winey, J. M.,Gupta, Yogendra M.,et al. Sound Velocities in Shock-Synthesized Stishovite to 72 GPa[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(23):13695-13703. |
APA | Berryman, Eleanor J.,Winey, J. M.,Gupta, Yogendra M.,&Duffy, Thomas S..(2019).Sound Velocities in Shock-Synthesized Stishovite to 72 GPa.GEOPHYSICAL RESEARCH LETTERS,46(23),13695-13703. |
MLA | Berryman, Eleanor J.,et al."Sound Velocities in Shock-Synthesized Stishovite to 72 GPa".GEOPHYSICAL RESEARCH LETTERS 46.23(2019):13695-13703. |
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