کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4680153 1634911 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diamond-bearing COHS fluids in the mantle beneath Hawaii
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Diamond-bearing COHS fluids in the mantle beneath Hawaii
چکیده انگلیسی

We apply Raman microspectroscopy to exceptionally high-density CO2 (+ H2O + H2S) fluid inclusions containing nanocrystalline diamonds, which are present in garnet pyroxenites from Salt Lake Crater from Oahu (Hawaii), and show for the first time the presence of free diamond-bearing carbonate-rich fluids/melts, originated within the asthenospheric mantle at depths greater than 150 km, in the diamond stability field. We argue that these fluids can migrate, generate compositional and rheological modifications to form small-scale fluid-rich regions beneath Hawaii, which are easily melted to give enriched basaltic magmas at normal mantle temperatures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 262, Issues 1–2, 15 October 2007, Pages 273–283
نویسندگان
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