Results 11 to 20 of about 293,215 (210)

Petrologic and geochronological constraints on the polymetamorphic evolution of the collisional granites, Araçuaí Orogen (SE Brazil)

Anais da Academia Brasileira de Ciências, 2021
Collisional granites of the Araçuaí Orogen, southeastern Brazil, record petrological and geochronological evidence for multiple crustal melting during the orogeny evolution. U-Pb zircon data indicate that these granites crystallized at 586 ± 2 M.y.
SANDRO MAURI, MARILANE G. MELO, CRISTIANO LANA, RODSON A. MARQUES   +3 more
doaj   +1 more source

Double Power-Law in Leucosome Width Distribution: Implications for Recognizing Melt Movement in Migmatites

Frontiers in Earth Science, 2020
Leucosome sizes in migmatites has been shown to follow power-law distribution, which is indicative of self-organized criticality governing accumulation and transport of partial melts in anatexis.
Anna Saukko, Christian Ahläng, Kaisa Nikkilä, Alvar Soesoo, Olav Eklund   +4 more
doaj   +1 more source

Study of mineral chemistry, thermobarometry and petrogenesis of migmatitic rocks of Hamedan area [PDF]

پترولوژی, 2018
In the Hamedan region, migmatitic rocks occur with various structures. In the Simin area (South Hamedan) stromatic and in the Darreh-Omar (Toyserkan) area ophtalmitic structures are abundant.
Ali Asghar Sepahi Gerow, Seyedeh Razieh Jafari, Mohssen Moazzen, Hossein Shahbazi   +3 more
doaj   +1 more source

Petrogenesis of Neoproterozoic Ultramafic Rocks, Wadi Ibib–Wadi Shani, South Eastern Desert, Egypt: Constraints from Whole Rock and Mineral Chemistry

Applied Sciences, 2021
This contribution deals with new geology, petrography, and bulk-rock/mineral chemistry of the poorly studied ultramafics of Wadi Ibib–Wadi Shani (WI–WS) district, South Eastern Desert, Egypt. These ultramafics are dismembered ophiolitic rocks that can be
El Saeed R. Lasheen, Gehad M. Saleh, Farrage M. Khaleal, Mamdooh Alwetaishi   +3 more
doaj   +1 more source

Spinel harzburgite–derived silicate melts forming sulfide-bearing orthopyroxenite in the lithosphere. Part 2: Sulfide compositions and their chalcophile and highly siderophile trace element signatures

Frontiers in Earth Science, 2022
In the first article, we have reported petrological data for a new, glass-bearing orthopyroxenite vein cutting a sub-arc mantle xenolith from Kamchatka.
A. Bénard
doaj   +1 more source

Machine learning with systematic density-functional theory calculations: Application to melting temperatures of single and binary component solids [PDF]

, 2014
A combination of systematic density functional theory (DFT) calculations and machine learning techniques has a wide range of potential applications.
Maekawa, Tomoya, Seko, Atsuto, Tanaka, Isao, Tsuda, Koji   +3 more
core   +2 more sources

Melting and Crystallization of Ice in Partially Filled Nanopores [PDF]

The Journal of Physical Chemistry B, 2011
We investigate the melting and formation of ice in partially filled hydrophilic and hydrophobic nanopores of 3 nm diameter using molecular dynamics simulations with the mW water model. Above the melting temperature, the partially filled nanopores contain two water phases in coexistence: a condensed liquid plug and a surface-adsorbed phase.
Gonzalez Solveyra, Estefania, de la Llave, Ezequiel Pablo, Scherlis Perel, Damian Ariel, Molinero, Valeria   +3 more
openaire   +4 more sources

Evaluation of the contributions of possible sources to the leucosome of the diatexite of Socorro-Guaxupé Nappe, in the Alfenas Region, MG, Brazil

Brazilian Journal of Geology, 2019
The Socorro-Guaxupé Nappe crops out in southern Minas Gerais and it has an intermediate unit called Metaxite Unit, dominated by diatexites at its base, with large volumes of leucosome and schollen of stromatic garnet-biotite metatexite.
Lizeth Hernandez Tasco, Renato Moraes
doaj   +1 more source

Does Underthrusting Crust Feed Magmatic Flare‐Ups in Continental Arcs?

Geochemistry, Geophysics, Geosystems, 2020
Episodic magmatic flare‐ups are documented in many continental arcs worldwide. Yet, the causes of such episodicity and the sources feeding the flare‐ups are not well‐understood.
Jiaming Yang, Wenrong Cao, Stacia M. Gordon, Xu Chu   +3 more
doaj   +1 more source

Phlogopite-Olivine Nephelinites Erupted During Early Stage Rifting, North Tanzanian Divergence

Frontiers in Earth Science, 2020
The North Tanzanian Divergence (NTD, eastern branch of the East African Rift) corresponds to an early stage of continental breakup. In the southern NTD, two quaternary volcanoes of the Manyara-Balangida rift (Labait, Kwaraha) have erupted primary ...
Céline Baudouin, Fleurice Parat
doaj   +1 more source