کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6305854 1307326 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stability and crystal chemistry of iron-bearing dense hydrous magnesium silicates
ترجمه فارسی عنوان
پایداری و شیمی کریستالی از سیلیکات منیزیم هیدروژنه متراکم آهن
کلمات کلیدی
سیلیکات منیزیم متراکم هیدروژناسیون، مریخ، چرخه آب، کانی شناسی غلاف، آزمایشات با فشار بالا،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی

Dense hydrous magnesium silicates (DHMS) are supposed to be key phases in planetary water cycles because of their ability to carry water to deep mantle regions in subduction slab environments. In order to understand water cycles in iron-enriched planetary systems such as Mars knowledge of the water content and stability of iron-bearing DHMS is required. Iron-bearing DHMS were synthesized based on two starting compositions, MgFeSiO4 + 9.5 wt% H2O system and a simple hydrous Martian mantle composition containing Fe, Mg, Al and Si + 12.35 wt% H2O (hydrous FMAS system). Compared to literature data on phase D, iron-bearing phase D shows analogous variations in water contents as Mg-phase D but appears to be stable at higher temperatures than Mg-phase D for both starting compositions used in this study. Iron-bearing superhydrous phase B contains up to 7 wt% H2O and shows an extended thermal stability in the hydrous FMAS system. The high-temperature stability of iron-bearing DHMS with a Mars-like bulk composition indicates that these hydrous phases could host significant amounts of water at core-mantle boundary conditions (1500 °C and 23 GPa) in a hydrous Martian mantle.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemie der Erde - Geochemistry - Volume 74, Issue 3, October 2014, Pages 489-496
نویسندگان
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