نتایج جستجو برای: peridotite
تعداد نتایج: 891 فیلتر نتایج به سال:
Geologic and pedologic controls are the main factors determining the behavior of elements in natural soil environments. In order to assess the role of these factors on content and distribution of selected major and trace elements in soil, six parent materials including: phyllite, tonalite, periditite, dolerite, shale and limestone were selected in Fuman-Masule region. Soil genesis and developme...
The investigated area is a part of Sabzevar ophiolite melang of North Eastern Iran which is important from two points of view, geology and its potential of Economic Mineral deposits. The main geological units in both Chah Yabu and Cheshmeh Palang areas are serpentinized peridotite, gabbro, diabasic dykes of Upper Cretaceous and Tertiary volcanic rocks which are mainly altered. Cheshmeh Palang a...
Mineralogical and geochemical study was performed on peridotite xenolith hosted by amygdaline basalts of Lanzarote Island (Canary archipelago). Their modal composition corresponds to harzburgite. Remarkably, the petrographic rocks is marked presence plagioclase. The isochron shows age 267±35 Ma, which might be initial stage opening a fragment Atlantic Ocean. peridotites were apparently derived ...
Earth’s mantle, whose bulk composition is broadly peridotitic, likely experienced periods of extensive melting in its early history that formed magma oceans and led to differentiation formation an atmosphere. However, the physical behaviour poorly understood, as high liquidus temperatures rapid quench rates required preserve peridotite liquids glasses have so far limited their investigation. In...
Abstract This study presents new secondary ion mass spectrometry (SIMS) reference materials (RMs) for measuring water contents in nominally anhydrous orthopyroxenes from upper mantle peridotites. The enstatitic spinel peridotite xenoliths have Mg#s between 0.83 and 0.86, Al 2 O 3 ranges 4.02 5.56 wt%, Cr 0.21 0.69 wt%. Based on Fourier-transform infrared spectroscopy (FTIR) characterizations, t...
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