کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8911505 1638616 2018 60 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Zircon and apatite-bearing pyroxene hornblendite mantle xenolith from Hungary, Carpathian-Pannonian region
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Zircon and apatite-bearing pyroxene hornblendite mantle xenolith from Hungary, Carpathian-Pannonian region
چکیده انگلیسی
A composite xenolith composed of a zircon-bearing, apatite-rich olivine-pyroxene hornblendite and an amphibole harzburgite part was found in an outcrop of Neogene alkali basalt at Szigliget, Bakony-Balaton Highland Volcanic Field, Western Hungary. The hornblendite is composed dominantly of amphibole that is strongly enriched in incompatible trace elements along with apatite, orthopyroxene and olivine. Zircon, rutile, ilmenite and sulphide occur as inclusions in the silicate minerals as accessory phases. On the basis of the chemical composition of the minerals, we estimate that the hornblendite crystallized at ~1000-1015 °C and 1.2-1.4 GPa pressure in the uppermost mantle under oxidising conditions (ΔlogfO2(FMQ)~ + 1.3). The hornblendite precipitated from a volatile and incompatible element-rich silicate melt with trachyte or phonolite composition, which might be derived from an alkali basalt melt by high-degree (>70%) fractional crystallisation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Lithos - Volumes 316–317, September 2018, Pages 19-32
نویسندگان
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