کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4742974 | 1641605 | 2006 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Elasticity of polycrystalline pyrope (Mg3Al2Si3O12) to 9 GPa and 1000 °C
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
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چکیده انگلیسی
Acoustic wave velocities for synthetic polycrystalline pyrope (Mg3Al2Si3O12) were measured to 9 GPa and temperatures up to 1000 °C by ultrasonic interferometry combined with energy-dispersive synchrotron X-ray diffraction in a cubic-anvil DIA-type apparatus (SAM-85). Specimen lengths at high pressures (P) and temperatures (T) are directly measured by X-radiographic methods. Elastic wave travel times and X-ray diffraction data were collected after heating and cooling at high pressures to minimize effect of non-hydrostatic stress on the measurements. A linear fit to the high P and T data set yields the elastic bulk and shear moduli [KS = 175 (2) GPa; G = 91 (1) GPa] and their pressure and temperature derivatives [Kâ²S=3.9±0.3; Gâ²Â = 1.7 ± 0.2 and (âKS/âT)P = â18 (2) MPa/K; (âG/âT)P = â10 (1) MPa/K]. In a separate analysis, the pressure-volume-temperature data collected during these acoustic experiments were fit to a high temperature Birch-Murnaghan (HTBM) equation [with Kâ² fixed at 3.9] and to each isothermal P-V-T data yielding (âKT/âT)P = â22 (2) MPa/K and (âKT/âT)P = â20 (5) MPa/K, respectively. Comparison of Py100 data with those other Py-Mj compositions indicates that the thermo elastic properties are insensitive to majorite content in the garnet along the pyrope-majorite join.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics of the Earth and Planetary Interiors - Volume 155, Issues 3â4, 16 May 2006, Pages 179-190
Journal: Physics of the Earth and Planetary Interiors - Volume 155, Issues 3â4, 16 May 2006, Pages 179-190
نویسندگان
Gabriel D. Gwanmesia, Jianzhong Zhang, Kenneth Darling, Jennifer Kung, Baosheng Li, Liping Wang, Daniel Neuville, Robert C. Liebermann,