نتایج جستجو برای: forsterite
تعداد نتایج: 553 فیلتر نتایج به سال:
Some volcanic rocks from Nyiragongo volcano in the Democratic Republic of Congo contain highly oxidized olivine crystals. These olivines crystals are made two phases, dark on backscattered electron images pure forsterite composition and grey Mg-poor areas iron-rich oxides. Calculation initial confirms that they primary with late separation different compositions. Pure is enriched SiO2 but conta...
The response of forsterite, Mg2SiO4, under dynamic compression is fundamental importance for understanding its phase transformations and high-pressure behavior. Here, we have carried out an in situ X-ray diffraction study laser-shocked polycrystalline single-crystal forsterite (a-, b-, c-orientations) from 19 to 122 GPa using the Matter Extreme Conditions end-station Linac Coherent Light Source...
The study area is located in northwest of Birjand, northern part of the Sistan suture zone in eastern Iran. There is well preserved outcrops of an ophiolite mélange in this area. This complex is composed of harzburgite, layered gabbro and spilitic basalt with flysch type rocks. Microprobe analyses of olivine, clinopyroxene, orthopyroxene and spinel in harzburgites show that olivine is forsterit...
We propose a Markov chain Monte Carlo-based deconvolution method designed to estimate the number of peaks in spectral data, along with optimal parameters each radial basis function. Assuming cases where is unknown, and sweep simulation on all candidate models computationally unrealistic, proposed efficiently searches over probable candidates via trans-dimensional moves assisted by annealing eff...
[1] Differential stresses in a cylindrical rock of polycrystalline Mg2SiO4 ringwoodite were measured at room temperature with pressures up to 10 GPa, axial strains in excess of 20%, and strain rates between 5 10 5 and 4 10 6 s , using the deformation-DIA coupled with monochromatic X-rays. The sample exhibited ductile behavior in axial shortening-lengthening cycles with reproducible hysteresis l...
Saturated absorption spectroscopy reveals the narrowest features so far in molecular gas-filled hollow-core photonic crystal fiber. The 48-68 mum core diameter of the kagome-structured fiber used here allows for 8 MHz full-width half-maximum sub-Doppler features, and its wavelength-insensitive transmission is suitable for high-accuracy frequency measurements. A fiber laser is locked to the (12)...
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