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Robert A. Creaser
Researcher at University of Alberta
Publications - 290
Citations - 14304
Robert A. Creaser is an academic researcher from University of Alberta. The author has contributed to research in topics: Zircon & Craton. The author has an hindex of 60, co-authored 276 publications receiving 12617 citations. Previous affiliations of Robert A. Creaser include La Trobe University & Durham University.
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Journal ArticleDOI
A Whiff of Oxygen Before the Great Oxidation Event
Ariel D. Anbar,Yun Duan,Timothy W. Lyons,Gail Lee Arnold,Brian Kendall,Robert A. Creaser,Alan J. Kaufman,Gwyneth W. Gordon,C. Scott,Jessica Garvin,Roger Buick +10 more
TL;DR: In this article, high-resolution chemostratigraphy reveals an episode of enrichment of the redox-sensitive transition metals molybdenum and rhenium in the late Archean Mount McRae Shale in Western Australia.
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A-type granites revisited: Assessment of a residual-source model
TL;DR: A residual source model for the origin of A-type granites is assessed by examining the likely mineral content and geochemistry of the residue remaining from generation of an I-type granite.
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Negative thermal ion mass spectrometry of osmium, rhenium, and iridium
TL;DR: In this article, a negative thermal ion mass spectrometer was used to obtain intense ion beams of negatively charged oxides of Os, Re and Ir by thermal ionization, in a conventional surface ionization mass analyzer.
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Cretaceous oceanic anoxic event 2 triggered by a massive magmatic episode
TL;DR: Se seawater osmium isotope ratios in organic-rich sediments from two distant sites are indicative of a widespread magmatic pulse at the onset of OAE2, which may have triggered the subsequent deposition of large amounts of organic matter.
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Isotopic evidence for geochemical decoupling between ancient epeiric seas and bordering oceans: Implications for secular curves
TL;DR: Isotopic analysis of conodonts and their host limestones sampled between two regionally extensive, altered volcanic ash layers in eastern Laurentia shows that a 454 Ma epeiric sea maintained large lateral differences in Nd and C isotope compositions.