Results 21 to 30 of about 2,520 (206)
Geochemistry, Geophysics, Geosystems, 2021 The Earth's upper mantle is isotopically heterogeneous over large lengthscales, but the lower limit of these heterogeneities is not well quantified. Grain scale trace elemental variability has been observed in mantle peridotites, which suggests that ...
Benjamin L. Byerly +2 more
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Pyroxene chemistry of xenoliths related to volcanic rocks in the Eslamieh Peninsula (Saray volcano): Implications for geothermobarometry and tectonic setting [PDF]
علوم زمین خوارزمی, 2023 The high K-volcanic rocks of the Eslamieh Peninsula (Saray) are exposed in the northwestern Urumieh-Dokhtar magmatic belt. They mainly include phonolitic lavas and related xenoliths.
Pouya Besharati +2 more
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Геодинамика и тектонофизика, 2023 The results of different-extension geological survey, exploration and thematic work methods show that the Vilyui syneclise is relatively amagmatic. However, the recent factual evidence in this region indicates the occurrence of magmatism of a different ...
V. V. Baranov +7 more
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How is carbonate crust digested by magma?
Frontiers in Earth Science, 2023 Magma’s volatile budget depends on deep magmatic sources, the degree of differentiation and degassing conditions, and volatile input from the assimilated crust.
Anastassia Y. Borisova, Wendy A. Bohrson
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Transport and eruption of mantle xenoliths creates a lagging problem
Communications Earth & Environment, 2023 Mantle-derived xenoliths entrained by low viscosity magmas indicate transport through great thicknesses of orogenic (≲50-80 km) and cratonic ( $$\lesssim$$ ≲ 20 km) mantle lithosphere.
James K. Russell, Thomas J. Jones
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THE NATURE OF ULTRAMAFIC XENOLITHS IN THE BASALTS OF LANZAROTE ISLAND (CANARY ARCHIPELAGO)
Геодинамика и тектонофизика, 2022 Mineralogical and geochemical study was performed on peridotite xenolith hosted by amygdaline basalts of Lanzarote Island (Canary archipelago). Their modal composition corresponds to harzburgite.
V. A. Krylova +2 more
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A quantitative analysis of xenolith fragmentation and incorporation in magma [PDF]
, 2015 A comparative analysis of xenolith size and shape versus frequency was conducted on datasets collected from four granodioritic plutons: 1) Jackass Lakes pluton, CA (n=104 metavolcanic/metasedimentary xenoliths, 0.001-1.0 km2); 2) Andalshatten batholith ...
Gates, Katie
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Geochemistry, Geophysics, Geosystems, 2013 Rejuvenated volcanism refers to the reemergence of volcanism after a hiatus of 0.5–2 Ma following the voluminous shield building stage of Hawaiian volcanoes.
Michael Bizimis +3 more
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Comptes Rendus. Géoscience, 2021 An alkaline volcanic activity with a relative Plio-Quaternary age (based on the succession of layers on the field) occurred in the northern part of Uromieh Dokhatar magmatic belt, Iran.
Khezerlou, Ali Akbar +5 more
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Journal of Asian Earth Sciences: X, 2022 This study focuses on the ability of spinel crystals in ultramafic xenoliths, like zircon, to store the primary composition and structure when exposed to magma fluid flows or the thermal heating of ultramafic fragments in magma flows during volcanic ...
Viktor Sharapov +3 more
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