Search Results - "Ayer, J. A"
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Uranium-lead zircon systematics in the Sudbury impact crater-fill; implications for target lithologies and crater evolution
Published in Journal of the Geological Society (01-01-2016)“…The Sudbury impact structure is one of only a few terrestrial impact craters capable of providing insight into large impact processes. However, despite more…”
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Hume: A Very Short Introduction
Published 2000“…Hume's "naturalist" approach to a variety of philosophical topics resulted in original theories about perception, self-identity, causation, morality, politics,…”
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Spatial and temporal variations in the geochemistry of komatiites and komatiitic basalts in the Abitibi greenstone belt
Published in Precambrian research (15-05-2002)“…Komatiites and komatiitic basalts in the Abitibi greenstone belt exhibit pronounced spatial and temporal variations in major and trace element geochemistry…”
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Niobium-enriched basalts from the Wabigoon subprovince, Canada: evidence for adakitic metasomatism above an Archean subduction zone
Published in Earth and planetary science letters (15-06-2000)“…Late Archean niobium-enriched basalts from the Central Sturgeon Lake assemblage and Neepawa group of the western Wabigoon subprovince have mantle-normalized…”
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Chalcophile element geochemistry and metallogenesis of komatiitic rocks in the Abitibi greenstone belt, Canada
Published in Economic geology and the bulletin of the Society of Economic Geologists (01-10-2005)“…Komatiitic rocks occur in four lithotectonic assemblages in the Abitibi greenstone belt of the Archaean Superior province: the 2750 to 2735 Ma Pacaud…”
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The formation of Neoarchean continental crust in the south-east Superior Craton by two distinct geodynamic processes
Published in Precambrian research (01-05-2021)“…•Large new time–space geochronological, geochemical and isotopic dataset used to analyse crustal evolution in the Archean south-east Superior Craton.•We…”
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MYERSON, A., AYER, J. B., PUTNAM, T. J., KELLER, C. E., and ALEXANDER, L., Eugenical Sterilization (Book Review)
Published in The American journal of psychology (01-01-1937)Get full text
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Depositional gaps in Abitibi greenstone belt stratigraphy; a key to exploration for syngenetic mineralization
Published in Economic geology and the bulletin of the Society of Economic Geologists (01-09-2008)“…Models of greenstone belt development are crucial for exploration. Allochthonous models predict belts to be a collage of unrelated fragments, whereas…”
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Neoarchean evolution of differing convergent margin assemblages in the Wabigoon Subprovince: geochemical and geochronological evidence from the Lake of the Woods greenstone belt, Superior Province, Northwestern Ontario
Published in Precambrian research (01-02-1997)“…The Neoarchean Lake of the Woods greenstone belt is subdivided into three lithostratigraphic assemblages: a lowermost mafic volcanic assemblage: a…”
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Rejoinder to Professor Malcolm
Published in The Journal of philosophy (25-05-1961)Get full text
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Professor Malcolm on Dreams
Published in The Journal of philosophy (04-08-1960)Get full text
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The Timmins-Porcupine gold camp, Ontario; anatomy of an Archean greenstone belt and ontogeny of gold mineralization
Published in Economic geology and the bulletin of the Society of Economic Geologists (01-09-2008)“…New structural and geochronological data and interpretations from the Timmins-Porcupine gold camp, Abitibi subprovince, more precisely define the stratigraphy…”
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Has Austin Refuted the Sense-Datum Theory?
Published in Synthese (Dordrecht) (01-01-1967)Get full text
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Pericontinental crustal growth of the southwestern Abitibi Subprovince, Canada; U-Pb, Hf, and Nd isotope evidence
Published in Economic geology and the bulletin of the Society of Economic Geologists (01-09-2008)“…The Abitibi subprovince is widely regarded as a classic example of Neoarchean continental crust formed in an ensimatic setting. However, sialic crust as old as…”
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