Results 1 to 10 of about 6,691 (288)

THERMOBAROMETRY OF DEPLETED PERIDOTITES

open access: diamondГеодинамика и тектонофизика
An assessment was made of the possibility of using olivine thermobarometry for xenoliths of depleted peridotites from the Udachnaya pipe (Yakutia), represented by 76 megacrystalline dunites and 5 megacrystalline harzburgites.
L. N. Pokhilenko   +2 more
doaj   +3 more sources

Thermobar: An open-source Python3 tool for thermobarometry and hygrometry

open access: greenVolcanica, 2022
We present Thermobar, a new open-source Python3 package for calculating pressures, temperatures, and melt compositions from mineral and mineral-melt equilibrium.
Penny Wieser   +6 more
doaj   +5 more sources

meltPT: A Python package for basaltic whole-rock thermobarometric analysis with application to Hawaiʻi

open access: yesVolcanica, 2023
Quantifying the depths and temperatures from which igneous rocks are derived is an important step in understanding volcanic, magmatic and mantle processes.
Fergus McNab, Patrick Ball
doaj   +1 more source

Crystallization conditions of two adjacent epidote + diopside-bearing granitic stocks, northeastern Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2021
The Tamboril and Olho d’Água granitic stocks are part of the abundant calc-alkalic magmatic epidote-bearing granitic rocks in the Cachoeirinha–Salgueiro Terrane (CST) in the Transversal Zone Domain, northeastern Brazil. The equigranular Olho d’Água stock
RENAN SIQUEIRA   +2 more
doaj   +1 more source

Old/New Subduction Zone Paradigms as Seen From the Cascades

open access: yesFrontiers in Earth Science, 2020
This paper briefly reviews the magmatic manifestations of volcanic arcs and aspects of how such magmas form. Common concepts about “how subduction zones work” are reassessed—with particular emphasis on the atypical Cascades volcanic arc.
William P. Leeman
doaj   +1 more source

Variations in the P‐T‐t of Deformation in a Crustal‐Scale Shear Zone in Metagranite

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Deformation in crustal‐scale shear zones occurs over a range of pressure‐temperature‐time (P‐T‐t) conditions, both because they may be vertically extensive structures that simultaneously affect material from the lower crust to the surface, and because ...
T. K. Cawood, J. P. Platt
doaj   +1 more source

Mineralogy and thermobarometry of metamorphic basement from the Kabul Block (Eastern Afghanistan) [PDF]

open access: yesپترولوژی, 2019
The cratonic basement in the Kabul district is dominated by gneiss, migmatite, schist, and amphibolite and is characterized by extensive outcrops.  Orthopyroxene and garnet are the index minerals of some of the gneisse, hence, they are considered as ...
Ali Mohammad Ramezani   +3 more
doaj   +1 more source

Mineral chemistry, Thermobarometry, Geochemistry and tectonic setting of Tertiary andesitic lavas in the Shourestan area (west of Sarbisheh), Southern Khorasan

open access: yesJournal of Economic Geology, 2022
In the Shourestan area, 14 kilometers west of Sarbisheh city, in South Khorasan province, volcanic rocks with pyroxene-andesite composition belonging to Eocene-Oligocene are exposed.
Seyyed Saeid Mohammadi   +3 more
doaj   +1 more source

Determination of P-T and tectonic setting of Ghaleh Yaghmesh plutonic complex (west of Yazd province) by using of mineral chemistry [PDF]

open access: yesپترولوژی, 2017
The Ghaleh Yaghmesh plutonic massif is located the westernmost part of Yazd province and in the central part of the Urumieh – Dokhtar magmatic arc (UDMA).
Bahareh Fazeli   +2 more
doaj   +1 more source

Paleozoic high-temperature metamorphism and deformation related to Proto-Tethys closure and Paleo-Tethys opening in the north of Central-East Iranian Microcontinent, based on the mineralogy of Airakan metagranite [PDF]

open access: yesپترولوژی, 2023
Granites are one of the most abundant rock groups formed the continental crust, and are considered for investigating the temperature conditions of their formation and metamorphism. Thus, they are a unique window to magmatism and tectonic evolution of the
Nargess Shirdashtzadeh
doaj   +1 more source

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