کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9532018 | 1638796 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Late Archean high-Mg granitoids (sanukitoids) in the southern Karelian domain, eastern Finland: Pb and Nd isotopic constraints on crustâmantle interactions
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Late Archean high-Mg granitoids (sanukitoids) in the southern Karelian domain, eastern Finland: Pb and Nd isotopic constraints on crustâmantle interactions Late Archean high-Mg granitoids (sanukitoids) in the southern Karelian domain, eastern Finland: Pb and Nd isotopic constraints on crustâmantle interactions](/preview/png/9532018.png)
چکیده انگلیسی
The geochemical and isotopic data suggest that the Nilsiä and Lieksa granitoids originated at ca. 2.73 Ga from a mantle-wedge source enriched in LILE, U, Th and Pb by recycling of continental material in subduction-related slab dehydration processes shortly (up to 200 Ma) before melting. A considerably large amount of crustal lead was contributed from subducting sediments into the overlying mantle wedge. Consequently, the isotopic composition of mantle-wedge lead was overprinted by crustal lead isotope signatures. It is suggested that crustal recycling through subduction zone processes played an important role for the enrichment of the mantle wedge and generation of mantle-derived high-μ granitoids in the Archean.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Lithos - Volume 79, Issues 1â2, January 2005, Pages 161-178
Journal: Lithos - Volume 79, Issues 1â2, January 2005, Pages 161-178
نویسندگان
Jaana Halla,