کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4716825 1638731 2010 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The heterogeneous nature of the Southern Tyrrhenian mantle: Evidence from olivine-hosted melt inclusions from back-arc magmas of the Marsili seamount
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
The heterogeneous nature of the Southern Tyrrhenian mantle: Evidence from olivine-hosted melt inclusions from back-arc magmas of the Marsili seamount
چکیده انگلیسی
The olivine-hosted melt inclusions with a composition different to that of the host rock reveal two further distinct geochemical signatures. One signature resembles that of the OIB-like lavas from the nearby Ustica Island, and is also alike to that of the few OIB-like lavas so far recovered from the Marsili volcano. However, the Marsili OIB-like melt inclusions are richer in SiO2, TiO2, Na2O, Zr, Y and HREE and depleted in CaO relative to these OIB-like lavas, suggesting an origin by melting of trachyandesitic bodies in the lower lithospheric mantle, which are themselves formed by high pressure fractional crystallization of parental OIB-like melts. The other detected signature is similar to that of the MORB lavas recording the early ocean-formation stage of the Southern Tyrrhenian back-arc basin. Nevertheless, the high CaO contents of these melts suggest that they probably resulted from melting of clinopyroxene-rich veins related to this early ocean-forming stage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Lithos - Volume 118, Issues 1–2, July 2010, Pages 1-16
نویسندگان
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