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Pyroxene megacrysts in Proterozoic anorthosites: Implications for tectonic setting, magma source and magmatic processes at the Moho
Abstract Proterozoic anorthosites from the 1630–1650 Ma Mealy Mountains Intrusive Suite (Grenville Province, Canada), the 1289–1363 Ma Nain Plutonic Suite (Nain–Churchill Provinces, Canada) and theExpand
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Crustal evolution and the temporality of anorthosites
Abstract Types of rock, such as komatiite, which formed entirely or dominantly during restricted time periods in solar system history, are important indicators of how planetary bodies evolved in deepExpand
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On the development of the calc-alkaline and tholeiitic magma series: A deep crustal cumulate perspective
Abstract Two distinct igneous differentiation trends – the tholeiitic and calc-alkaline – give rise to Earth's oceanic and continental crust, respectively. Mantle melting at mid-ocean ridges producesExpand
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New evidence for a volcanic arc on the western margin of a rifting Rodinia from ultramafic intrusions in the Andriamena region, north-central Madagascar
Abstract Ultramafic–mafic complexes that intruded into Archaean ortho- and paragneisses in the Andriamena region of north-central Madagascar fall within the domain of a 900-km-long belt consisting ofExpand
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Fluoride concentrations in the arid Namaqualand and the Waterberg groundwater, South Africa: Understanding the controls of mobilization through hydrogeochemical and environmental isotopic approaches
Abstract A comprehensive survey was conducted to understand the high concentration of fluoride in the groundwater systems of Namaqualand and Waterberg regions, as well as its association with theExpand
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Magma-driven, high-grade metamorphism in the Sveconorwegian Province, southwest Norway, during the terminal stages of Fennoscandian Shield evolution
Recently it has been argued that the Sveconorwegian orogeny in southwest Fennoscandia comprised a series of accretionary events between 1140 and 920 Ma, behind a long-lived, active continental marginExpand
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Isotopic disequilibrium and lower crustal contamination in slowly ascending magmas: Insights from Proterozoic anorthosites
Abstract Many Proterozoic anorthosite massifs show crustal isotopic signatures that have, for decades, fuelled debate regarding the source of these temporally-restricted magmas. Are these signaturesExpand
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Large-scale magmatic layering in the Main Zone of the Bushveld Complex and episodic downward magma infiltration
The Bellevue drillcore intersects ~3 km of Main and Upper Zone cumulates in the Northern Limb of the Bushveld Complex. Main Zone cumulates are predominately gabbronorites, with localized layers ofExpand
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Proterozoic massif-type anorthosites as the archetypes of long-lived (≥100 Myr) magmatic systems—New evidence from the Kunene Anorthosite Complex (Angola)
Abstract Proterozoic massif-type anorthosites are voluminous, plagioclase-dominated plutonic suites with characteristic intermediate compositions (An50±10) that represent mantle-derived magmas pondedExpand
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Pegmatitic Pods in the Mealy Mountains Intrusive Suite, Canada: Clues to the Origin of the Olivine-Orthopyroxene Dichotomy in Proterozoic Anorthosites
The anorthositic members of the Mealy Mountains Intrusive Suite (MMIS; Labrador, Canada) are host to 0� 5–5 m diameter pegmatitic, pod-like segregations, originally described as graphic granite pods.Expand
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