Results 51 to 60 of about 6,694 (263)

Oxygen Thermobarometry of Orogenic Lherzolite Massifs

open access: yesJournal of Petrology, 1992
The oxidation state has been determined for spinel peridotites from 13 orogenic lherzolite massifs including Beni Bousera, Ronda, and 11 smaller massifs in the French Pyrenees. The oxygen fugacity (f o2) was calculated for 67 samples from microprobe analyses using a set of secondary spinel standards to correct the ferric iron content in the spinels ...
Woodland, AB, Kornprobst, J, Wood, B
openaire   +3 more sources

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

Table Cape vent xenolith suite, northwest Tasmania: Mineralogy and implications for crust-mantle lithology and Miocene geotherms in Tasmania. [PDF]

open access: yes, 2005
The Miocene Table Cape vent erupted a diverse mantle-crust xenolith suite within its fractionated nephelinitic matrix. Assemblages include mantle metaperidotites, garnet-metawebsterites and rarer garnet-metadinopyroxenitcs, garnct-mctawehrlites ...
Pogson, RE, Raynor, LR, Sutherland, FL
core   +3 more sources

MORB-derived amphibolites in the Paleozoic basement of the Aluminé Igneous-Metamorphic Complex, Neuquén, Argentina: Decoding its genesis, P-T evolution and pre-Andean regional correlations

open access: yesGeologica Acta, 2019
Amphibolites included in the metapelitic sequence and as xenoliths in intrusive magmatic rocks outcropping in the southern sector of the Aluminé Igneous-Metamorphic Complex (AIMC), Neuquén, Argentina, are studied in detail in order to determine their ...
I. URRAZA, S. DELPINO, L. GRECCO
doaj   +1 more source

Magmatic evolution of the La Huerta Plutonic Complex, Jalisco: A 80–70 Ma record of arc magmatism along the Mexican Cordillera

open access: yesRevista Mexicana de Ciencias Geológicas, 2023
The La Huerta Plutonic Complex (LHPC) forms part of the Cretaceous Mexican Cordillera, located between the well-documented ~80 Ma Puerto Vallarta Batholith (PVB) and the ~65 Ma Manzanillo Plutonic Complex (MPC).
Guillermo A. Ortiz-Joya   +5 more
doaj   +1 more source

Deep lithospheric dynamics beneath the Sierra Nevada during the Mesozoic and Cenozoic as inferred from xenolith petrology [PDF]

open access: yes, 2001
Peridotite xenoliths erupted in late Miocene basalts (~8 Ma) in the central Sierra Nevada sample a lithosphere that is vertically stratified in terms of age and thermal history.
Brimhall, George H., Jr.   +2 more
core   +1 more source

Interaction between protokimberlite melts and mantle lithosphere: evidence from mantle xenoliths from the Dalnyaya kimberlite pipe, Yakutia (Russia) [PDF]

open access: yes, 2017
The Dalnyaya kimberlite pipe (Yakutia, Russia) contains mantle peridotite xenoliths (mostly lherzolites and harzburgites) that show both sheared porphyroclastic (deformed) and coarse granular textures, together with ilmenite and clinopyroxene megacrysts.
Afanasiev   +101 more
core   +2 more sources

A new clinopyroxene thermobarometer for mafic to intermediate magmatic systems [PDF]

open access: yesEuropean Journal of Mineralogy, 2021
Clinopyroxene-only thermobarometry is one of the most practical tools to reconstruct crystallization pressures and temperatures of clinopyroxenes. Because it does not require any information of coexisting silicate melt or other co-crystallized mineral ...
X. Wang   +8 more
doaj   +1 more source

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