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Tytuł:
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Globally distributed iridium layer preserved within the Chicxulub impact structure.
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Autorzy:
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Goderis S; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium. .
Sato H; Department of Geosciences, University of Padova, Padova, Italy.; Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan.
Ferrière L; Natural History Museum, Vienna, Austria.
Schmitz B; Astrogeobiology Laboratory, Division of Nuclear Physics, Department of Physics, Lund University, Lund, Sweden.
Burney D; Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN, USA.
Kaskes P; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium.; Laboratoire G-Time, Université Libre de Bruxelles, Brussels, Belgium.
Vellekoop J; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium.; Department of Geology, KU Leuven, Leuven, Belgium.
Wittmann A; Eyring Materials Center, Arizona State University, Tempe, AZ, USA.
Schulz T; Department of Lithospheric Research, University of Vienna, Vienna, Austria.; Institut für Geologie und Mineralogie, Universität zu Köln, Köln, Germany.
Chernonozhkin SM; Atomic and Mass Spectrometry-A&MS research group, Department of Chemistry, Ghent University, Ghent, Belgium.
Claeys P; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium.
de Graaff SJ; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium.; Laboratoire G-Time, Université Libre de Bruxelles, Brussels, Belgium.
Déhais T; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium.; Laboratoire G-Time, Université Libre de Bruxelles, Brussels, Belgium.
de Winter NJ; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium.; Department of Earth Sciences, Utrecht University, Utrecht, Netherlands.
Elfman M; Astrogeobiology Laboratory, Division of Nuclear Physics, Department of Physics, Lund University, Lund, Sweden.
Feignon JG; Department of Lithospheric Research, University of Vienna, Vienna, Austria.
Ishikawa A; Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, Japan.; Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan.
Koeberl C; Department of Lithospheric Research, University of Vienna, Vienna, Austria.
Kristiansson P; Astrogeobiology Laboratory, Division of Nuclear Physics, Department of Physics, Lund University, Lund, Sweden.
Neal CR; Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN, USA.
Owens JD; Department of Earth, Ocean and Atmospheric Science and National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA.
Schmieder M; HNU Neu-Ulm University of Applied Sciences, Neu-Ulm, Germany.; Lunar and Planetary Institute-USRA, Houston, TX, USA.
Sinnesael M; Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium.; Department of Earth Sciences, Durham University, Durham, UK.
Vanhaecke F; Atomic and Mass Spectrometry-A&MS research group, Department of Chemistry, Ghent University, Ghent, Belgium.
Van Malderen SJM; Atomic and Mass Spectrometry-A&MS research group, Department of Chemistry, Ghent University, Ghent, Belgium.
Bralower TJ; Department of Geosciences, Pennsylvania State University, University Park, PA, USA.
Gulick SPS; Institute for Geophysics, University of Texas at Austin, Austin, TX, USA.; Department of Geological Sciences, University of Texas at Austin, Austin, TX, USA.; Center for Planetary Systems Habitability, University of Texas, Austin, TX, USA.
Kring DA; Lunar and Planetary Institute-USRA, Houston, TX, USA.
Lowery CM; Institute for Geophysics, University of Texas at Austin, Austin, TX, USA.
Morgan JV; Department of Earth Science and Engineering, Imperial College London, London, UK.
Smit J; Department of Earth Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.
Whalen MT; Department of Geosciences, University of Alaska Fairbanks, Fairbanks, AK, USA.
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Corporate Authors:
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IODP-ICDP Expedition 364 Scientists
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Źródło:
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Science advances [Sci Adv] 2021 Feb 24; Vol. 7 (9). Date of Electronic Publication: 2021 Feb 24 (Print Publication: 2021).
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Washington, DC : American Association for the Advancement of Science, [2015]-
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Entry Date(s):
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Date Created: 20210225 Latest Revision: 20210312
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Update Code:
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20240105
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PubMed Central ID:
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PMC7904271
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DOI:
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10.1126/sciadv.abe3647
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PMID:
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33627429
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The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail the recovery of life during the succeeding millennia. The iridium layer provides a key temporal horizon precisely linking Chicxulub to K-Pg boundary sections worldwide.
(Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).)
