Results 31 to 40 of about 910 (212)
Magma Plumbing During the 2014–2015 Eruption of Fogo (Cape Verde Islands)
Frontiers in Earth Science, 2020 Phenocrysts in volcanic rocks are recorders of magmatic processes that have occurred at depth before and during a volcanic eruption. Our petrological investigations of stratigraphically controlled tephrite and phonotephrite samples from the latest ...
Andreas Klügel +3 more
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Petrography, geochemistry and mineral chemistry of the Almogholagh intrusive rocks (Hamedan, Iran): Evidences for their shallow-level emplacement [PDF]
پترولوژی, 2018 The Almogholagh plutonic body with about 10 km2 is located 15 km of West of Hamedan city and on the Sanandaj-Sirjan zone. The Almogholagh pluton consists of diorite and gabbroic diorite, monzodiorite, quartz monzodiorite, monzonite, quartz monzonite ...
Hossein Shahbazi +6 more
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Geosciences, 2021 The garnet chemical zoning method (GZM) is a reliable thermodynamic approach for forward modeling pressure-temperature (P-T) paths using observed garnet and bulk rock compositions.
Thomas M. Etzel, Elizabeth J. Catlos
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Геодинамика и тектонофизикаThe thermal history and thickness of the lithospheric mantlebeneath the kimberlite fields of the Eastern Anabar shield and adjacent territories of the Siberian craton were reconstructed based on the composition of clinopyroxene xenocrysts from the ...
А. M. Dymshits +2 more
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Amp-TB2: An Updated Model for Calcic Amphibole Thermobarometry [PDF]
Minerals, 2021 Amphibole (Amp) plays a crucial role in the study of several earth and planetary processes. One of its most common applications is in thermobarometry, especially for volcanic-magmatic systems. However, many thermobarometers require the input of melt composition, which is not always available in volcanic products (e.g., partially crystallized melts or ...
openaire +1 more source
Geochemistry, Geophysics, Geosystems, 2020 Pressure‐temperature (P‐T) conditions and high‐resolution paths from 11 garnet‐bearing rocks collected across Himalayan fault systems exposed along the Bhagirathi River (Uttarakhand, NW India) reveal the tectonic conditions responsible for their growth ...
Elizabeth J. Catlos +5 more
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Journal of Economic Geology, 2020 Introduction The Aliabad area is located in the northwest of Nain. Volcanic rocks of the Aliabad area have andesitic to rhyolitic composition. On the basis of petrographic investigations, porphyritic texture is the main texture of these rocks.
Rezvan Mehvari, Mortaza Sharifi
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Garnet-Amphibolites Mineralogy and thermobarometry in Aliabad-Damagh (south of Hamedan, Sanandaj-Sirjan Zone) [PDF]
پترولوژی, 2017 The garnet-amphibolites in Aliabad-Damagh area, occurs as layers and are enveloped by staurolite-schist. They composed predominantly of garnet, hornblende, feldspar (± muscovite and quartz) with titanite, epidote, ilmenite and graphite as accessory ...
Ali Akbar Baharifar +3 more
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Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.Abstract Subduction initiation often begins with slow, forced convergence, switches “on” catastrophically as the slab collapses into the mantle, and then evolves to steady‐state, self‐sustained sinking that drives global plate movements. Numerical models suggest that the collapse phase implies sudden weakening of the plate interface.
Alissa J. Kotowski +3 more
wiley +1 more source
Литосфера, 2020 Research subject. The article discusses the features of the relationship between biotite and amphibole on the example of magmatogene melanocratic rocks from a number of granitoid massifs of the Urals. These rocks form xenoliths and synplutonic intrusions
S. V. Pribavkin
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