Melt addition to mid-ocean ridge peridotites increases spinel Cr# with no significant effect on recorded oxygen fugacity
نویسندگان
چکیده
منابع مشابه
کاربرد شیمی کروم‌اسپینل در مطالعه سنگ‌زایی و محیط زمین‌ساختی پریدوتیت‌های مجموعه افیولیتی شمال شرق کامیاران
Northeast Kamyaran ophiolitic complex is mainly composed of harzburgite along with small outcrops of lherzolite. Harzburgites are extensively altered to serpentinite. Small lenses of chromite mineralization are observed in harzburgites. The mineral assemblage present in the study harzburgite and lherzolite are olivine, orthopyroxene and clinopyroxene along with minor amount of spinel. Microprob...
متن کاملکانی شناسی و سنگ‌زائی کروم‌اسپینل‌های توده‌ی فراقلیایی رودان، استان هرمزگان
The studied area is located in the north of Rudan city and is a part of Kahnuj - Rudan - Minab ophiolite belt. The studied rock are harzburgite and lherzolite and are composed of olivine, orthopyroxene, clinopyroxene and chrome – spinel (as a minor). According to microprobe data, the amount of MgO in the olivines ranges between %50.17 to %50.55, so these olivines are forsterite. Clinopyroxenes ...
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The Mantle Electromagnetic and Tomography (MELT ) Experiment was designed to distinguish between competing models of magma generation beneath mid-ocean ridges. Seismological observations demonstrate that basaltic melt is present beneath the East Pacific Rise spreading center in a broad region several hundred kilometers across and extending to depths greater than 100 kilometers, not just in a na...
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At most mid-ocean ridges, a wide region of decompression melting must be reconciled with a narrow neovolcanic zone and the establishment of full oceanic crustal thickness close to the rift axis. Two competing paradigms have been proposed to explain melt focusing: narrow mantle upwelling due to dynamic effects related to in situ melt or wide mantle upwelling with lateral melt transport in inclin...
متن کاملImaging the deep seismic structure beneath a mid-ocean ridge: the MELT experiment
The Mantle Electromagnetic and Tomography (MELT) Experiment was designed to distinguish between competing models of magma generation beneath mid-ocean ridges. Seismological observations demonstrate that basaltic melt is present beneath the East Pacific Rise spreading center in a broad region several hundred kilometers across and extending to depths greater than 100 kilometers, not just in a nar...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2021
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2021.116951