کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1780967 | 1523929 | 2015 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Delamination in super-Earths extrapolated from the Earth model
ترجمه فارسی عنوان
خلع سلاح در ابرهای زمین از مدل زمین خارج شده است
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کلمات کلیدی
لایه لایه شدگی، فوق العاده زمین، دینامیک داخلی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
چکیده انگلیسی
It is suggested that the delamination process, in which the mantle lithosphere is peeled into the asthenosphere, contributes to the topographies and magmatism of the Earth. We investigated the vigorousness of the delamination in super-Earths by applying the Earth model to planets of heavy mass. Delamination is induced in planets of mass 5Mâ by the negative buoyancy of the mantle lithosphere. However, assuming pressure dependent rheology, the thermal Rayleigh number decreases due to the high pressure in super-Earths and thus the magnitude of convection in the Moho decreases. Because reduced convection in the Moho weakens the peeling of the mantle lithosphere, the delaminated area is narrower. The magnitude of the heat flux caused by the delamination process is also reduced in planets large in size compared with Earth. Although further work is needed, our model indicates that delamination can transfer more heat than the conduction of the lithosphere if the planet׳s mass is less than 5Mâ.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volumes 109â110, May 2015, Pages 38-45
Journal: Planetary and Space Science - Volumes 109â110, May 2015, Pages 38-45
نویسندگان
D. Shoji, K. Kurita,