LAUSR

About LAUSR
Donate
Contact Us

Follow us:

You are not signed in:

Sign Up!


   Articles with "magmas" as a keyword



Photo from wikipedia

Chemical variability in peralkaline magmas and magma reservoirs: insights from the Khaggiar lava flow, Pantelleria, Italy

Sign Up to like & get
recommendations! Published in 2020 at "Contributions to Mineralogy and Petrology"

DOI: 10.1007/s00410-020-01678-0

Abstract: Silicic volcanoes are increasingly understood to be underlain by crystal-rich and vertically extensive magma reservoirs within which disequilibrium is widespread. Observations from ignimbrite deposits demonstrate that silicic magma reservoirs are often compartmentalised and compositionally stratified.… read more here.

Keywords: magmas; magma reservoirs; peralkaline; magma ... See more keywords
Photo by stayandroam from unsplash

Late Neoproterozoic to Carboniferous genesis of A-type magmas in Avalonia of northern Nova Scotia: repeated partial melting of anhydrous lower crust in contrasting tectonic environments

Sign Up to like & get
recommendations! Published in 2017 at "International Journal of Earth Sciences"

DOI: 10.1007/s00531-017-1512-7

Abstract: Avalonian rocks in northern mainland Nova Scotia are characterized by voluminous 640–600 Ma calc-alkalic to tholeiitic mafic to felsic magmas produced in a volcanic arc. However, after the cessation of arc activity, repeated episodes of felsic… read more here.

Keywords: avalonia; magmas; type magmas; nova scotia ... See more keywords
Photo from wikipedia

The evolution of magma during continental rifting : new constraints from the isotopic and trace element signatures of silicic magmas from Ethiopian volcanoes

Sign Up to like & get
recommendations! Published in 2018 at "Earth and Planetary Science Letters"

DOI: 10.1016/j.epsl.2018.02.027

Abstract: Abstract Magma plays a vital role in the break-up of continental lithosphere. However, significant uncertainty remains about how magma-crust interactions and melt evolution vary during the development of a rift system. Ethiopia captures the transition… read more here.

Keywords: magmas; evolution; melt evolution; rift ... See more keywords
Photo from wikipedia

Silica-enriched mantle sources of subalkaline picrite-boninite-andesite island arc magmas

Sign Up to like & get
recommendations! Published in 2017 at "Geochimica et Cosmochimica Acta"

DOI: 10.1016/j.gca.2016.09.030

Abstract: Primary arc melts may form through fluxed or adiabatic decompression melting in the mantle wedge, or via a combination of both processes. Major limitations to our understanding of the formation of primary arc melts stem… read more here.

Keywords: magmas; arc; primary arc; silica ... See more keywords
Photo by glenncarstenspeters from unsplash

Geochemistry and mantle source characteristics of the Itasy volcanic field: Implications for the petrogenesis of basaltic magmas in intra-continental-rifts

Sign Up to like & get
recommendations! Published in 2021 at "Geochimica et Cosmochimica Acta"

DOI: 10.1016/j.gca.2021.02.025

Abstract: Abstract We present new major and trace element and Sr, Nd, Pb, Hf, and Os isotope data for Quaternary basaltic lavas and tephra from the Itasy volcanic field, in order to assess the origin and… read more here.

Keywords: itasy volcanic; field; geochemistry; volcanic field ... See more keywords
Photo from wikipedia

Recycling in the subduction factory: Archaean to Permian zircons in the oceanic Cretaceous Caribbean island-arc (Hispaniola)

Sign Up to like & get
recommendations! Published in 2018 at "Gondwana Research"

DOI: 10.1016/j.gr.2017.09.010

Abstract: Abstract Little mineralogical evidence is left of the recycling of continental and oceanic crust into the mantle at subduction zones. Zircon, because of its exceptional robustness, is probably the only surviving phase and the best… read more here.

Keywords: magmas; island arc; arc; subduction ... See more keywords
Photo from wikipedia

The genetic relationship between andesites and dacites at Tungurahua volcano, Ecuador

Sign Up to like & get
recommendations! Published in 2018 at "Journal of Volcanology and Geothermal Research"

DOI: 10.1016/j.jvolgeores.2017.11.012

Abstract: Abstract Volcanic eruptions of intermediary and silica-rich magmas (andesites, dacites and rhyolites) in convergent arc settings generate voluminous and explosive eruptions that can strongly affect human activity and have significant environmental impacts. It is therefore… read more here.

Keywords: magmas; petrology; relationship andesites; andesites dacites ... See more keywords
Photo from wikipedia

Interaction between mingling mafic and felsic magmas: Its roles in differentiation of a quartz monzonite and MMEs from eastern South China

Sign Up to like & get
recommendations! Published in 2018 at "Lithos"

DOI: 10.1016/j.lithos.2018.07.033

Abstract: Abstract Compositional profiles and mapping of selected mafic microgranular enclaves (MMEs) in Muchen quartz monzonite in eastern South China give constraints on the interaction between mingling mafic and felsic magmas. The intrusion is a typical… read more here.

Keywords: magmas; eastern south; mafic felsic; magma ... See more keywords
Photo from wikipedia

Polybaric/polythermal magma transport and trace element partitioning recorded in single crystals: A case study of a zoned clinopyroxene from Mt. Etna

Sign Up to like & get
recommendations! Published in 2020 at "Lithos"

DOI: 10.1016/j.lithos.2020.105382

Abstract: Abstract We present elemental maps and intra-crystal compositional profiles conducted on a representative clinopyroxene phenocryst from the 1974 eccentric lava flows at Mt. Etna volcano (Sicily, Italy). The eruption was fed by deep-seated and primitive… read more here.

Keywords: magmas; rich core; cats rich; magma ... See more keywords
Photo by samaustin from unsplash

Crystal plasticity as an indicator of the viscous-brittle transition in magmas

Sign Up to like & get
recommendations! Published in 2017 at "Nature Communications"

DOI: 10.1038/s41467-017-01931-4

Abstract: Understanding the flow of multi-phase (melt, crystals and bubbles) magmas is of great importance for interpreting eruption dynamics. Here we report the first observation of crystal plasticity, identified using electron backscatter diffraction, in plagioclase in… read more here.

Keywords: magmas; crystal plasticity; brittle transition; viscous brittle ... See more keywords
Photo from wikipedia

Arc magmas oxidised by water dissociation and hydrogen incorporation in orthopyroxene

Sign Up to like & get
recommendations! Published in 2019 at "Nature geoscience"

DOI: 10.1038/s41561-019-0411-x

Abstract: Elevated H2O concentrations and oxygen fugacities are two fundamental properties that distinguish magmas formed in subduction zones from new crust generated at mid-ocean ridges. However, the mechanism of magma oxidation and how it relates to… read more here.

Keywords: arc magmas; magmas; oxidised water; magmas oxidised ... See more keywords