دورية أكاديمية
أعرض في EDS

Melting and density of MgSiO 3 determined by shock compression of bridgmanite to 1254GPa.

التفاصيل البيبلوغرافية
العنوان: Melting and density of MgSiO 3 determined by shock compression of bridgmanite to 1254GPa.
المؤلفون: Fei Y; Earth and Planets Laboratory, Carnegie Institution for Science, Washington, DC, USA. yfei@carnegiescience.edu., Seagle CT; Sandia National Laboratories, Albuquerque, NM, USA., Townsend JP; Sandia National Laboratories, Albuquerque, NM, USA., McCoy CA; Sandia National Laboratories, Albuquerque, NM, USA., Boujibar A; Earth and Planets Laboratory, Carnegie Institution for Science, Washington, DC, USA., Driscoll P; Earth and Planets Laboratory, Carnegie Institution for Science, Washington, DC, USA., Shulenburger L; Sandia National Laboratories, Albuquerque, NM, USA., Furnish MD; Sandia National Laboratories, Albuquerque, NM, USA.
المصدر: Nature communications [Nat Commun] 2021 Feb 09; Vol. 12 (1), pp. 876. Date of Electronic Publication: 2021 Feb 09.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101528555 Publication Model: Electronic Cited Medium: Internet ISSN: 2041-1723 (Electronic) Linking ISSN: 20411723 NLM ISO Abbreviation: Nat Commun Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: [London] : Nature Pub. Group
مستخلص: The essential data for interior and thermal evolution models of the Earth and super-Earths are the density and melting of mantle silicate under extreme conditions. Here, we report an unprecedently high melting temperature of MgSiO 3 at 500 GPa by direct shockwave loading of pre-synthesized dense MgSiO 3 (bridgmanite) using the Z Pulsed Power Facility. We also present the first high-precision density data of crystalline MgSiO 3 to 422 GPa and 7200 K and of silicate melt to 1254 GPa. The experimental density measurements support our density functional theory based molecular dynamics calculations, providing benchmarks for theoretical calculations under extreme conditions. The excellent agreement between experiment and theory provides a reliable reference density profile for super-Earth mantles. Furthermore, the observed upper bound of melting temperature, 9430 K at 500 GPa, provides a critical constraint on the accretion energy required to melt the mantle and the prospect of driving a dynamo in massive rocky planets.
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معلومات مُعتمدة: EAR-1619868 National Science Foundation (NSF)
تواريخ الأحداث: Date Created: 20210210 Latest Revision: 20240330
رمز التحديث: 20240330
مُعرف محوري في PubMed: PMC7873221
DOI: 10.1038/s41467-021-21170-y
PMID: 33563984
قاعدة البيانات: MEDLINE
الوصف
تدمد:2041-1723
DOI:10.1038/s41467-021-21170-y