Results 31 to 40 of about 19,778 (275)
Shock metamorphism in plagioclase and selective amorphization [PDF]
, 2020 Plagioclase feldspar is one of the most common rock‐forming minerals on the surfaces of the Earth and other terrestrial planetary bodies, where it has been exposed to the ubiquitous process of hypervelocity impact. However, the response of plagioclase to
Ludovic Ferrière +9 more
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Deformation-facilitated melting of plagioclase
, 2022 International audienceGeological processes involving deformation and/or reactions are highly influenced by the rock grain size, especially if diffusion-controlled processes take place such as long-range metamorphic reactions and diffusion creep. Although
Baïsset, Marie +3 more
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APG: An Efficient Software Program for Amp-Pl Thermobarometry Based on Graphical Method [PDF]
Journal of Sciences, Islamic Republic of Iran, 2011 Geothermobarometry equations are based on thermodynamic principles and appear in single or multi-variant functions. The number of variants for a specific composition or reaction usually is reduced into 2 involving temperature (T) and pressure (P).
M. Sayari
doaj
Frontiers in Earth Science, 2020 A multi-disciplinary study, integrating volcanological field observations, petrography, whole rock geochemistry and textural and compositional analyses on plagioclase crystals has been carried out on the products of Monte Luccia, Spiaggia Lunga, and ...
Eugenio Nicotra +3 more
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Frontiers in Earth Science, 2021 Study of melt inclusions (MIs) is a commonly applied method for defining the composition of magmas present at depth prior to mixing, fractionation, and degassing. Our ability to use data from MIs is complicated by post-entrapment processes (PEP) that can
Kristen R. Lewis +4 more
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Deep Underground Science and Engineering, EarlyView.The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza +3 more
wiley +1 more source
Plagioclase as evidence of magmatic evolution in the Zafarqand porphyry copper deposit, NE Isfahan
Journal of Economic Geology, 2018 Introduction Chemical and textural zoning patterns preserved in plagioclase phenocrysts can provide useful information on parameters that constrains the changing melt compositions in the magma systems.
Maryam Aminoroayaei Yamini +3 more
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Rapakivi texture in porphyritic dikes within the Karavanke granitic massif (Slovenia) [PDF]
Bulletin of the Geological Society of Finland, 2002 The northern Karavanke Granitic Massif straddles the Slovenian–Austrian border. The investigated area lies in northern Slovenia, and extends from the western Slovenian–Austrian border to the east for about 30 km, with a maximum width of 2 km.
M. Dobnikar, T. Dolenec, G. Bellieni
doaj +1 more source
Exploring wave propagation behaviors in rock: A grain‐based perspective on mineral structures
Deep Underground Science and Engineering, EarlyView.This study investigates wave propagation in rock at the grain scale using a grain‐based model, revealing that mineral elastic modulus significantly influences wave attenuation while grain size and distribution have limited effects. A novel peak particle velocity attenuation prediction model is proposed and validated for grain‐scale wave propagation ...
Zhiyi Liao +3 more
wiley +1 more source
A Study of Plagioclase Feldspars in Low-Grade Metamorphic Rocks from the Madoc Area of Southeastern Ontario [PDF]
, 1968 A brief description of a low grade regionally metamorphosed region in the Madoc area in Southern Ontario is given. Plagioclase compositions from metamorphosed basic rocks of this region were studied with the intention of finding co-existing ...
White, Michael
core