Low strength of Earth's uppermost mantle inferred from tri-axial deformation experiments on dry olivine crystals
Low strength of Earth's uppermost mantle inferred from tri-axial deformation experiments on dry olivine crystals
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DOI：
10.1016/j.pepi.2013.04.008
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发表时间：
2013-07-01
影响因子：
2.3
通讯作者：
Cordier, Patrick
中科院分区：
文献类型：
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作者：
Demouchy, Sylvie;Tommasi, Andrea;Cordier, Patrick
我们在与上地幔温度相关的800 - 1090 ℃之间对不同取向的San卡洛斯橄榄石单晶进行了三轴压缩实验。实验在300 MPa的围压下在高分辨率气体介质力学测试装置中以各种恒定应变速率（从7 × 10（-6）s（-1）到1 × 10（-4）s（-1））进行;它们产生的差应力范围从88到754 MPa。非偏振红外光谱分析表明，橄榄石晶格中的氢浓度非常低（
We have performed tri-axial compression experiments on single crystals of San Carlos olivine with various orientations at temperatures relevant for the uppermost mantle, between 800 and 1090 degrees C. The experiments were carried out at a confining pressure of 300 MPa in a high-resolution gas-medium mechanical testing apparatus at various constant strain rates (from 7 x 10(-6) s(-1) to 1 x 10(-4) s(-1)); they yield differential stresses ranging from 88 to 754 MPa. Unpolarized infrared spectroscopy analyses indicate that hydrogen concentration in the olivine lattice is very low (