Journal ArticleDOI
U-decay series and trace element systematics in the 1978 eruption of Ardoukoba Asal rift : timescale of magma crystallization
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In this paper, the trace element variations can be modeled as a single fractional crystallization series which requires 30% crystallization (49% plagioclase, 39% olivine, 12% clinopyroxene).About:
This article is published in Earth and Planetary Science Letters.The article was published on 1999-12-30. It has received 57 citations till now. The article focuses on the topics: Fractional crystallization (geology) & Plagioclase.read more
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Ultrafast Source-to-Surface Movement of Melt at Island Arcs from 226Ra-230Th Systematics
TL;DR: Island arc lavas have radium-226 excesses that extend to higher values than those observed in mid-ocean ridge or ocean island basalts, and these appear to have been introduced into the base of the mantle melting column by fluids released from the subducting plate.
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Insights into Magma Genesis at Convergent Margins from U-series Isotopes
TL;DR: In this article, the role of high quality U-series isotope data has been discussed in obtaining precise information on time scales and the development of quantitative physical models for convergent margin magmatism.
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U series disequilibria: Insights into mantle melting and the timescales of magma differentiation
TL;DR: In this paper, the basic principles of extracting time information from U series nuclides and summarize variations in (230Th/238U), (226Ra/230Th), and (231Pa/235U) observed in magmas from mid-ocean ridges, within-plate settings, and subduction zones to contrast melt generation processes in different tectonic settings.
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Time scales of magmatic processes
TL;DR: In this article, a relative chronometry based on major, trace element and isotope profiles in crystals that may have been modified by diffusion is used to determine the time scales of magmatic processes.
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Melt extraction in the Earth's mantle: Constraints from U–Th–Pa–Ra studies in oceanic basalts
TL;DR: In this paper, the authors show that U-series systematics in oceanic basalts can indeed be explained by models where melt transport occurs without chemical equilibrium between melt and solid when variations in all three critical melting parameters (residual porosity, upwelling rate of the solid mantle and melt velocity) are taken into account.
References
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Journal ArticleDOI
Prediction of crystal–melt partition coefficients from elastic moduli
Jon D Blundy,Bernard Wood +1 more
TL;DR: In this paper, the size and elasticity of the crystal lattice sites play a critical role in predicting the partitioning behavior of isovalent cations in geochemical processes.
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Mid-ocean ridge magma chambers
John M. Sinton,Robert S. Detrick +1 more
TL;DR: In this paper, it was shown that the composition of the melt lens is mainly moderately fractionated ferrobasalt, which is consistent with a model that effectively separates the processes of magma mixing and fractionation into different parts of a composite magma chamber.
Mid-ocean ridge magna chambers
J. M. Sinton,R. S. Detrick +1 more
TL;DR: In this article, the authors show that the composition of the melt lens is mainly moderately fractionated ferrobasalt with isolated pockets of magma in the transition zone of the East Pacific Rise (EPR).
Journal ArticleDOI
Densities of liquid silicate systems calculated from partial molar volumes of oxide components
Y. Bottinga,D. F. Weill +1 more
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Geochemical evolution during fractional crystallisation of a periodically refilled magma chamber
TL;DR: A realistic model of volcanic plumbing predicts that most of the established major, trace and isotopic chemical features of the common basalts could have been imposed during magma evolution in high level magma chambers, for which process there is extensive independent field and phase equilibria evidence.
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Mineral-Melt Partitioning of Uranium, Thorium and Their Daughters
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