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- W2076854188 abstract "The end Permian marks the greatest extinction in the geological record, but there is no consensus on whether it was caused by terrestrial or extraterrestrial factors. Platinum group elements (PGE) can readily separate extraterrestrial from terrestrial sources and the few studies so far (from China and Europe) indicate terrestrial sources for the PGE. We report here detailed PGE analyses of two expanded sections from the late Permian northern and southern hemispheres that allow separate events to be distinguished and confirm a terrestrial source for the PGE. These sources are either contemporaneous seawater or older basaltic volcanics associated with the sections and the PGE were precipitated by a possible combination of development of anoxia in the oceans and post-depositional redistribution. The PGE content in sections at the Permo–Triassic boundary is the result of geochemical and lithological control on metal precipitation that is found in many other black shales throughout geological time." @default.
- W2076854188 created "2016-06-24" @default.
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- W2076854188 date "2010-04-01" @default.
- W2076854188 modified "2023-09-26" @default.
- W2076854188 title "Platinum element group variations at the Permo–Triassic boundary in Kashmir and British Columbia and their significance" @default.
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- W2076854188 doi "https://doi.org/10.1016/j.chemgeo.2010.01.008" @default.
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