Olivine-Ahrensite Phase Relations in the Mg₂SiO₄-Fe₂SiO₄ System as a Function of Temperature

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00009088
URN to cite this document: urn:nbn:de:bvb:703-epub-9088-3

Title data

Chanyshev, Artem ; Bondar, Dmitry ; Wang, Lin ; Fei, Hongzhan ; Tsujino, Noriyoshi ; Song, Yunke ; Martirosyan, Naira ; Chakraborti, Amrita ; Kim, Eun Jeong ; Tang, Hu ; Bhat, Shrikant ; Farla, Robert ; Katsura, Tomoo:
Olivine-Ahrensite Phase Relations in the Mg₂SiO₄-Fe₂SiO₄ System as a Function of Temperature.
In: Journal of Geophysical Research: Solid Earth. Vol. 131 (2026) Issue 1 . - e2025JB032870.
ISSN 2169-9356
DOI der Verlagsversion: https://doi.org/10.1029/2025JB032870

	Format: PDF Name: JGR Solid Earth - 2026 - Chanyshev - Olivine‐Ahrensite Phase Relations in the Mg2SiO4‐Fe2SiO4 System as a Function of.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Abstract

Olivine and ahrensite are the primary components of the interiors of Fe-rich terrestrial planets and meteorites, making their phase relations crucial for planetary science. Moreover, their phase relations can be used for calibrating large-volume high-pressure devices such as multi-anvil apparatus. Here we defined the olivine–ahrensite phase relations in the MgO-FeO-SiO2 system at 7.5–12.0 GPa at 1,530 and 1,950 K using a multi-anvil apparatus. Combining the current results with our previously determined binary loop at 1,740 K, we re-estimated the shock parameters of several L5 and L6-types meteorites. Also, we determined the olivine-ahrensite phase ratio and compositions along cold and warm Mars aerotherms for Mg/(Mg + Fe) ratios of 0.75 and 0.80. Using this mineralogical model, we estimated and compared seismic wave velocity profiles in Mars' interior to data from the InSight geophysical mission.

Further data

Item Type:	Article in a journal
Keywords:	experimental; olivine; ahrensite; phase transition; thermobarometry; meteorites
DDC Subjects:	500 Science > 550 Earth sciences, geology
Institutions of the University:	Research Institutions > Central research institutes > Bavarian Research Institute of Experimental Geochemistry and Geophysics - BGI Research Institutions Research Institutions > Central research institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-9088-3
Date Deposited:	07 Apr 2026 14:37
Last Modified:	07 Apr 2026 14:37
URI:	https://epub.uni-bayreuth.de/id/eprint/9088

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