نتایج جستجو برای: orthopyroxenite
تعداد نتایج: 29 فیلتر نتایج به سال:
The corundum is found in the rocks of Berit metaophiolite Eastern Anatolia, near Doğanşehir a province Malatya. Metaophiolitic consist mainly garnet metagabbro, granulite, amphibolite, mylonitic amphibole schist, pyroxenite, orthopyroxenite, harzburgite, serpentinized dunite and diorite units. Corundum occurrences are mostly pyroxenites, amphibolites, peridotites granulites. Their colors change...
Abstract Mass transfer between crust and mantle at continental margins is a crucial process in shaping heterogeneity material cycling deep Earth. usually archived by the slab-derived and/or asthenosphere-derived component, which metasomatize cratonic wedge. Clarifying origin temporal sequences of these records fundamental aim yet poorly resolved. Comprehensive petrography, whole-rock mineral co...
The Bushveld Complex in South Africa shows spectacular examples of regional and local magmatic erosion the floor cumulates by new melt batches that replenished evolving magma chamber. Field observations indicate that, at some stratigraphic levels, least, 15–20 m pre-existing cumulates, often nearly monomineralic composition (e.g., anorthosite or orthopyroxenite) were completely removed on a sca...
Introduction: MIL 03346 is a newly discovered clinopyroxenite belonging to the nakhlite class of SNC (martian) meteorites [1]. Although the petrographic and geochemical characteristics of MIL 03346 are broadly similar to those of previously known nakhlites, there are also some differences. In particular, it has the highest abundance of glassy mesostasis among the nakhlites, possibly indicative ...
Introduction: New discoveries in cold (Antarctica) and hot desert areas have significantly increased the number of Martian meteorites (SNC) to more than 50 (unpaired) [1,2]. Martian meteorites are classified in four main groups in terms of their pe-trology and mineralogy, namely Orthopyroxenite (1 published member), Chassignites (dunite, 2), Nakhlites (clinopyroxenite, 7) and Shergottites (42) ...
We have done bulk rock compositional analyses (INAA, ICP-MS) and petrologic study of a suite of diogenite meteorites. Most contain orthopyroxenes with mg#s of 70.6– 79.0. Meteorite Hills (MET) 00425 is magnesian (mg# of 83.9). Lewis Cliff (LEW) 88011 contains orthopyroxene grains of varying mg# (76.3–68.6). Queen Alexandra Range (QUE) 93009 (orthopyroxene mg# 70.6) contains coarse-grained norit...
Introduction: The chemically and mineralogically zoned carbonates within the oldest martian meteorite, ALH84001 (a coarse grained orthopyroxenite) have been the subject of intense study [1-9] since McKay et al [3] suggested that they may contain evidence for life. Whilst these studies have revealed a convoluted history, there remains no consensus on the mechanism and temperature of carbonate fo...
Abstract To characterize the integrated magmatic processes for magma plumbing systems from mantle sources to chambers, we present Mg–Sr–Nd isotopic data a representative mafic–ultramafic intrusion in Xiarihamu, northern Tibetan Plateau, China. The hosts largest Ni–Cu sulfide deposit an orogenic setting world and is composed predominantly of harzburgite, orthopyroxenite, websterite, gabbronorite...
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