We provide results of a comprehensive mineralogical and microstructural study relict lherzolites the main ore field fresh rocks from deep structural borehole drilled in south-eastern part Kempirsay massif. Olivine orthopyroxene contain numerous pieces evidence material redistribution at different scales caused mainly by solid-state processes, such as plastic flow mantle, syntectonic recrystalli...

Chondrites are undifferentiated meteorites that can provide information on the compositions of materials in early solar System, including building blocks terrestrial planets. While most chondrites belong to well-defined groups based their mineralogy and chemical composition, a minor fraction have unusual characteristics classified as ungrouped chondrites. These reflect diversity chondritic syst...

New mineralogical and geochemical data from a suite of glass ± from the mantle (Deines & Gold, 1973; Nelson et al., 1988). However, controversy remains as to whether such apatite ± amphibole ± phlogopite ± carbonate-bearing spinel magmas represent (1) direct partial melts of carbonatewehrlite, lherzolite and harzburgite xenoliths from the Newer Volbearing mantle peridotite (i.e. primary carbona...

Major element fractionation among chondrites has been discussed for decades as ratios relative to Si or Mg. Expressing ratios relative to Fe leads to a new relationship admitting the possibility that ordinary chondrite meteorites are derived from two components: one is a relatively undifferentiated, primitive component, oxidized like the CI or C1 chondrites; the other is a somewhat differentiat...

Introduction: Whole rocks, chondrules and matrix from the same chondrite group typically have the same or very similar oxygen-isotopic compositions [e.g., 1]. Among the three major clans of chondrites, enstatite chondrites (ECs) have the most uniform oxygen isotopic compositions (Fig. 1). In order to study oxygen-isotopic heterogeneity of ECs in microscale, we carried out SIMS measurements on c...

The atomic structures of magnesium silicate melts are key to understanding processes related to the evolution of the Earth's mantle and represent precursors to the formation of most igneous rocks. Magnesium silicate compositions also represent a major component of many glass ceramics, and depending on their composition can span the entire fragility range of glass formation. The silica rich enst...