نتایج جستجو برای: kyanite

تعداد نتایج: 177  

2003
Artem Romaevich Oganov

Applications of state-of-the-art computer simulations to important Earthand rock-forming minerals (Al2SiO5 polymorphs, albite (NaAlSi3O8), and MgSiO3 perovskite) are described. Detailed introductions to equations of state and elasticity, phase transitions, computer simulations, and geophysical background are given. A new general classification of phase transitions is proposed, providing a natur...

Journal: :Geodinamika i Tektonofizika 2022

In the Western Sangilen (Tuva–Mongolia microcontinent, Central Asian Orogenic Belt, Russia) rare mineral ferrohögbomite-2S2N, for first time, was found in a deep-seated contact aureole of early Paleozoic Bayan-Kol gabbro-monzodiorite intrusion. The rocks are diatexites roof pendant, where metamorphics gabbronorite. Diatexites formed as result strong melting and desilication quartz-bearing kyani...

2012
GEORGE R. ROSSMAN

Hydrous components in the nominally anhydrous minerals were first of significance for their impact on the mechanical strength of minerals and on the dielectric properties of synthetic materials. They are now known to influence a large number of chemical and physical properties of the host mineral and are thought to be an important contribution to the Earth’s water cycle. Detection, and concentr...

Journal: :Remote Sensing 2021

Clustering methods unequivocally show considerable influence on many recent algorithms and play an important role in hyperspectral data analysis. Here, we challenge the clustering for mineral identification using two different strategies long wave infrared (LWIR, 7.7–11.8 ?m). For that, compare to perform a unique dataset. The first algorithm uses spectral comparison techniques all pixel-spectr...

Journal: :Geoscience frontiers 2021

Spiral garnet porphyroblasts are known to record lengthy periods of deformation and metamorphism by preserving single or multiple FIAs (Foliation Intersection Axis) formed normal tectonic shortening directions. Thanks technological advances in X-ray computed micro-tomography (XCMT), can now be readily determined relatively large samples contrast previous methods that require the preparation a s...

Journal: :Mineralogical Magazine 2022

Abstract Eclogite-facies mineral assemblages are commonly preserved in mafic protoliths within continental terranes. It is widely accepted that the entirety of these terrains must also have been subducted to eclogite-facies conditions. However, evidence felsic material transformed at conditions lacking. Low-strain metagranites ultrahigh-pressure metamorphic Tso Morari Complex Ladakh, Himalaya, ...

2010
Vernon Hodges Kip Vernon Hodges B. C. Burchfiel

The Aefjord-Sitas area (approximately 68*15'N;16*45'E) includes three of the principal tectonic elements of the northern Scandinavian Caledonides: a) a nappe complex, representing the main Caledonian allochthon and consisting of metasedimentary and metaigneous rock sequences that are probably in part of oceanic provenance; b) the Rombak window, a fenster through the nappe complex revealing Balt...

ساکی, عادل,

Microstructural and petrographical features as well as field relations, show that formation of the metapelitic rocks of Bolandparchin and Poshtuk in northwestern Iran was poly-metamorphic. Mineral assemblages in the metapelites of two areas are different. The Bolandparchin schists are graphite-rich and have dark color. Peak metamorphic assemblage is garnet, biotite, staurolite, aluminosilicate ...

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