کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8911563 1638617 2018 49 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase relations and melting of nominally 'dry' residual eclogites with variable CaO/Na2O from 3 to 5 GPa and 1250 to 1500 °C; implications for refertilisation of upwelling heterogeneous mantle
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Phase relations and melting of nominally 'dry' residual eclogites with variable CaO/Na2O from 3 to 5 GPa and 1250 to 1500 °C; implications for refertilisation of upwelling heterogeneous mantle
چکیده انگلیسی
In upwelling heterogenous mantle domains, the siliceous eclogitic melts formed within a body of eclogite will react with encapsulating mantle peridotite, effectively refertilising it and producing hybrid pyroxene- and garnet-rich rocks. Subsequent melting of these sources may lead to compositionaly diverse primitive mantle-derived magmas, with high Ca/Al and low Na/Ca signatures indicators of preferential melting of a heterogeneous mantle, previously refertilised by recycled Ca-rich oceanic crustal material, and primitive magmas with low Ca/Al and high Na/Ca derived from melting of mantle with a 'normal recycled crustal material signature'. Thus, compositional magma diversity may directly reflect precursor compositions of the mantle source region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Lithos - Volumes 314–315, August 2018, Pages 506-519
نویسندگان
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