کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1781248 1523947 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ancient primary crust beneath the Aristarchus plateau: Constraints from gravity and topography data
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
Ancient primary crust beneath the Aristarchus plateau: Constraints from gravity and topography data
چکیده انگلیسی


• Crustal and load densities are calculated from localized admittance analyses.
• This area has insufficient subsurface loads and a thin elastic lithosphere.
• The subsurface crust is supposed to be a block of ancient highland crust.

The Moon's Aristarchus Plateau, proposed to be a complex proto-shield volcano, has relatively well-localized gravity and topography in the northwestern region, where homogenous pyroclastic deposits occur on the surface. We applied a localized admittance analysis in this region to constrain its subsurface structure. A thin lithospheric flexure model that considers both surface and subsurface loads is used to predict the gravity signal. Our results indicate no obvious dense materials in the subsurface and a thin elastic lithosphere of this region. The best-fit crustal density is 2590 kg m−3 with 1−σ limits of 2400 and 2690 kg m−3, and the best-fit density of the load is constrained to be 2480 kg m−3, ranging from 2430 to 2530 kg m−3. Both the crustal and load densities are consistent with the bulk density of lunar highlands crust, suggesting a possible ancient primary crust beneath this northwestern area. Our results indicate that ancient primary crusts existed at some locations contemporarily with the emplacement of mare basalts in Oceanus Procellarum.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volume 89, December 2013, Pages 188–193
نویسندگان
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