کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5780009 1634698 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen and carbon fractionation during core-mantle differentiation at shallow depth
ترجمه فارسی عنوان
تجزیه نیتروژن و کربنات در طی تمایز قدام-گوشته در عمق کم عمق
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
At modestly reduced conditions (ΔIW−0.4 to −2.2), N is more compatible in core-forming metal than in molten silicate (1≤DNmetal/silicate≤24), while at more reduced conditions (ΔIW−2.2 to ΔIW−3.5), N becomes more compatible in the magma ocean than in the metal phase. In contrast, C is highly siderophile at all conditions investigated (100≤DCmetal/silicate≤700). Therefore, sequestration of volatiles in the core affects C more than N, and lowers the C:N ratio of the BSE. Consequently, the N depletion and the high C:N ratio of the BSE cannot be explained by core formation. Mass balance modeling suggests that core formation combined with atmosphere blow-off also cannot produce a non-metallic Earth with a C:N ratio similar to the BSE, but that the accretion of a C-rich late veneer can account for the observed high BSE C:N ratio.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 458, 15 January 2017, Pages 141-151
نویسندگان
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