Journal ArticleDOI
A siliceous komatiitic source of Bushveld magmas revealed by primary melt inclusions in olivine
I.P. Solovova,Marina A. Yudovskaya,Marina A. Yudovskaya,Judith A. Kinnaird,Allan Wilson,N. G. Zinovieva +5 more
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TLDR
In this article, a thermobarogeochemical study of the primary melt inclusions in olivine (Fo91) from poikilitic harzburgite to dunite of the Uitkomst Complex in the Bushveld Igneous Province revealed a series of melt compositions that are the result of combined fractional crystallization and assimilation.About:
This article is published in Lithos.The article was published on 2021-05-01. It has received 8 citations till now. The article focuses on the topics: Melt inclusions & Fractional crystallization (geology).read more
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Sheared Peridotite and Megacryst Formation Beneath the Kaapvaal Craton: a Snapshot of Tectonomagmatic Processes across the Lithosphere–Asthenosphere Transition
Sebastian Tappe,Malcolm Massuyeau,Malcolm Massuyeau,Katie A. Smart,Alan B. Woodland,Nikolaus Gussone,Sarah Milne,Andreas Stracke +7 more
TL;DR: In this article, a comprehensive petrology and Sr-Nd-Hf-Ca isotope study of sheared peridotite xenoliths and clinopyroxene megacrysts from the ca. 1150 Ma Premier kimberlite pipe on the central Kaapvaal craton in South Africa was conducted.
Journal ArticleDOI
Origin of the J-M Reef and lower banded series, stillwater complex, Montana, USA
M. Christopher Jenkins,M. Christopher Jenkins,James E. Mungall,Michael L. Zientek,Gelu Costin,Zhuosen Yao +5 more
TL;DR: The origin and parental magma for layered cumulates in the Lower Banded series (LBS) and the J-M Reef Pd-Pt deposit of the Stillwater Complex remains poorly constrained.
The Quench Control of Water Estimates in Convergent Margin Magmas
TL;DR: In this article, the quenchability of hydrous mafic melts has been studied via hydrothermal experiments and it was shown that the ability to quench a mfic hydrous melt to a homogeneous glass at cooling rates relevant to natural samples has a limit of no more than 9 ± 1 wt% of dissolved H2O in the melt.
Dissolution and precipitation of forsterite in a thermal gradient: implications for cellular growth of olivine phenocrysts in basalt and melt inclusion formation
TL;DR: In this article, the development of cellular growth requires low degrees of undercooling (a few °C) and large crystal-liquid interfaces (~ 1 mm across or more), and it occurs at a growth rate of the order of 10−9 m/s.
Journal ArticleDOI
Formation of Spinel-Orthopyroxene Symplectites by Reactive Melt Flow: Examples from the Northern Bushveld Complex and Implications for Mineralization in Layered Intrusions
Marina A. Yudovskaya,Judith A. Kinnaird,Gelu Costin,Matthew McCreesh,Vladimir V. Shilovskikh,Elena Kovalchuk,Dmitry Kuzmin +6 more
TL;DR: In this paper , the authors found that spinels in the symplectites vary with host rock and increasing stratigraphic height: in the lower parts of the stratigraphy spinels is represented by Cr-poor chromite, the spinel is Cr magnetite in more evolved rocks, and in the most evolved rocks the spinels are magnetite.
References
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The composition of the Earth
William F. McDonough,Shen-Su Sun +1 more
TL;DR: In this paper, the authors compared the relative abundances of the refractory elements in carbonaceous, ordinary, and enstatite chondritic meteorites and found that the most consistent composition of the Earth's core is derived from the seismic profile and its interpretation, compared with primitive meteorites, and chemical and petrological models of peridotite-basalt melting relationships.
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Trace element and isotopic effects of combined wallrock assimilation and fractional crystallization
TL;DR: In this paper, the mass assimilation rate is an arbitrary fraction(r) of the fractional crystallization rate, where r < 1 is a combination of zone refining and fractional scaling.
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Geothermobarometry in Four-phase Lherzolites II. New Thermobarometers, and Practical Assessment of Existing Thermobarometers
Gerhard P. Brey,T. Köhler +1 more
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IUGS Reclassification of the High-Mg and Picritic Volcanic Rocks
TL;DR: The 1989 IUGS classification of the igneous rocks for the high-Mg and picritic volcanic rocks has been revised in this article, which is applicable only to komatiite and meimechite, and the minimum MgO requirement for picrite is reduced to 12 wt %.