کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5784105 | 1638634 | 2017 | 50 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal and metasomatic rejuvenation and dunitization in lithospheric mantle beneath Central Europe - The Grodziec (SW Poland) case study
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
Group A xenoliths from Grodziec record migration of mixed carbonatite-alkaline silicate melts through the subcontinental lithospheric mantle beneath Lower Silesia, which preceded the migration of melts similar to the Grodziec nephelinite. The peridotitic protoliths were dunitized at the direct contacts with the migrating nephelinite melt and are now represented by group B. Group C pyroxenites originated in mantle conditions by crystal settling in places of transient nephelinite melt stagnation. The mantle section beneath Grodziec was reheated to ca 1000-1100 °C. The Grodziec scenario is similar to that of KsiÄginki (northern extension of Eger Rift, SW Poland), which shares a similar age of xenolith entrainment. Both sites show that the processes of mantle metasomatism and thermal rejuvenation of subcontinental lithospheric mantle were more intense during the Lower Oligocene volcanic climax compared to those recorded in younger (ca 20 Ma) xenolith suites from Lower Silesia.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Lithos - Volume 276, 1 April 2017, Pages 15-29
Journal: Lithos - Volume 276, 1 April 2017, Pages 15-29
نویسندگان
Magdalena Matusiak-MaÅek, Mateusz Äwiek, Jacek Puziewicz, Theodoros Ntaflos,