کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6347814 1313464 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Petrology, Geochemistry (Isotopic Geochemistry)Evidence of heterogeneous crustal origin for the Pan-African Mbengwi granitoids and the associated mafic intrusions (northwestern Cameroon, central Africa)
ترجمه فارسی عنوان
پترولوژی، ژئوشیمی (ژئوشیمی ایزوتوپی) شواهد مبدا پوسته ناهمگن برای گرانیتوییدهای مگنگوی پان-آفریقایی و نفوذهای مافی آن (شمال غرب آمریکا، مرکزی آفریقای جنوبی)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی

The Mbengwi plutonics consist of intermediate to felsic granitoids forming a continuous magmatic series from monzonite to granite and mafic intrusions. Their mineralogical composition consists of quartz, plagioclases, K-feldspars, biotite, muscovite, and amphibole. The accessory phase includes opaque minerals + titanite ± apatite ± zircon, while secondary minerals are pyrite, phengite, chlorite, epidote, and rarely calcite. These plutonics are assigned high-K calc-alkaline to shoshonitic series, metaluminous to weakly peraluminous and mostly belong to an I-type suite (A/CNK = 0.63-1.2). They are typically post-collisional, with a subduction signature probably being inherited from their protoliths emplaced during the subduction phase. The Sr and Nd isotopic data evidence that these plutonics result from melting of the lower continental crust with variable contribution of the oceanic crust. Their geochemical features are similar to those of western Cameroon granitoids related to the Pan-African D1 event in Cameroon.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comptes Rendus Geoscience - Volume 348, Issue 2, February–March 2016, Pages 116-126
نویسندگان
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