Results 1 to 10 of about 3,320,793 (217)

A re-evaluation of the peak P–T conditions of eclogite-facies metamorphism of the Paleozoic Acatlán Complex (Mexico) reveals deeper subduction [PDF]

open access: yesScientific Reports, 2022
Eclogites in the Acatlán Complex, southern Mexico, record the subduction history of the complex. Previous studies indicate that the proto-Acatlán Complex reached 
D. Hernández-Uribe
doaj   +2 more sources

Regularity and existence of solutions to parabolic equations with nonstandard p(x,t),q(x,t)-growth conditions [PDF]

open access: yesOpuscula Mathematica, 2023
We study the Cauchy-Dirichlet problem for a class of nonlinear parabolic equations driven by nonstandard \(p(x,t),q(x,t)\)-growth condition. We prove theorems of existence and uniqueness of weak solutions in suitable Orlicz-Sobolev spaces, derive global ...
Hamid El Bahja
doaj   +1 more source

Insights into the structural evolution of the pre-Variscan rocks of the Eastern Pyrenees from La Molina quartz veins; constraints on chlorite and fluid inclusion thermometry

open access: yesGeologica Acta, 2020
Quartz veins hosted in the infra and overlying series to the (Sardic) Upper Ordovician Unconformity provide new insights into the structural and thermal evolution of the pre-Variscan rocks of the Eastern Pyrenees.
E. González-Esvertit   +3 more
doaj   +3 more sources

High P-T Calcite-Aragonite Phase Transitions Under Hydrous and Anhydrous Conditions

open access: yesFrontiers in Earth Science, 2022
The subduction of calcite into deep Earth and subsequent phase change are important for global carbon cycle. However, the study of the phase boundary between calcite and aragonite under high P-T conditions is insufficient due to sparse existing phase ...
Xia Zhao   +10 more
doaj   +1 more source

P–T CONDITIONS, U/Pb AND 40Ar/39Ar ISOTOPIC AGES OF UHT GRANULITES FROM CAPE KALTYGEI, WESTERN BAIKAL REGION

open access: yesГеодинамика и тектонофизика, 2021
The study is focused on metapelitic granulites of Cape Kaltygei (Western Baikal region) that contain a diagnostic mineral assemblage of ultrahigh temperature (UHT) metamorphic rocks (orthopyroxene+sillimanite+quartz).
N. I. Volkova   +5 more
doaj   +1 more source

Microstructure and properties degradation of P/T 91, 92 steels weldments in creep conditions [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2012
The studies were performed on dissimilar ferritic/austenitic weldments between 9Cr tempered martensitic steels of the grades either P/T 91 or 92 and unstabilised AISI316H austenitic steel.
Falat L.   +4 more
doaj   +1 more source

PT-conditions of deformation within the Palaeoproterozoic South Finland shear zone: Some geothermobarometric results [PDF]

open access: yesBulletin of the Geological Society of Finland, 2005
Four rock samples were collected from the crustal-scale South Finland shear zone in order to compare PT-conditions of deformation between gneissose and mylonitic rock types.
T. Torvela, H. Annersten
doaj   +1 more source

Genetic aspects of Sn, Li, Be, Nb-Ta pegmatites and Sn-W vein deposits of the Damaran orogeny, Namibia [PDF]

open access: yesBulletin of the Geological Society of Finland, 1987
The pegmatites of the Northern, Central and Southern tin belts of the Damaran orogeny, which contain tin, lithium, beryllium and niobium-tantalum mineralizations, belong to the Abukuma low pressure metamorphic facies series, or to the intermediate-level ...
J.T. Ollila
doaj   +1 more source

Oscillation criteria for nonlinear differential equations with $p(t)$-Laplacian [PDF]

open access: yesMathematica Bohemica, 2016
Recently there has been an increasing interest in studying $p(t)$-Laplacian equations, an example of which is given in the following form (|u'(t)|^{p(t)-2}u'(t))'+c(t)|u(t)|^{q(t)-2}u(t)= 0, \quad t>0.
Yutaka Shoukaku
doaj   +1 more source

Timing of late Palaeoproterozoic metamorphism in the northern Belomorian Belt, White Sea region: Conclusions from U-Pb isotopic data and P-T evidence [PDF]

open access: yesBulletin of the Geological Society of Finland, 2001
Brilliant-looking zircon crystals from a garnet-amphibolitic, metamorphosed mafic dyke at Lyagkomina in the Lake Kovdozero area, northern Belomorian Belt, most probably mark the 1875±4 Ma age of peak late Palaeoproterozoic regional metamorphism which ...
T. Skiöld   +3 more
doaj   +1 more source

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