Globally distributed iridium layer preserved within the Chicxulub impact structure

IODP-ICDP Expedition 364 Scientists

doi:10.1126/sciadv.abe3647

Globally distributed iridium layer preserved within the Chicxulub impact structure

IODP-ICDP Expedition 364 Scientists

Earth Sciences

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

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.

Original language	English
Article number	eabe3647
Pages (from-to)	1-13
Number of pages	13
Journal	Science advances
Volume	7
Issue number	9
DOIs	https://doi.org/10.1126/sciadv.abe3647 https://doi.org/10.1126/sciadv.abe3647
Publication status	Published - 24 Feb 2021

Bibliographical note

Publisher Copyright:
Copyright © 2021 The Authors, some rights reserved.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Funding

Financial support was provided by the Belgian Federal Science Policy Office (BELSPO) project Chicxulub and Research Foundation-Flanders (FWO) project G0A6517. S.G., P.C., S.C., and F.V. thank FWO and the Fonds de la Recherche Scientifique (FNRS) for financial support through the EOS-Excellence of Science program (ET-HoME ID 30442502). S.G., P.C., P.K., J.V., S.J.d.G., and T.D. were also supported by the VUB strategic program. B.S. acknowledges the support by the K&A Wallenberg Foundation and ERC Advanced Grant ASTROGEOBIOSPHERE 213000. J.D.O. is supported by NASA Exobiology (80NSSC18K1532) and the National High Magnetic Field Laboratory (Tallahassee, Florida), which is funded by the National Science Foundation Cooperative Agreement No. DMR1644779 and the State of Florida. F.V. acknowledges BOF-UGent for financial support. Funding also came from FWO grants 11E6619N (to P.K.), 12Z6618N (to J.V.), and 12S5718N (to S.J.M.V.M.), NSF-OCE-1737087 (to A.W.), NSF-OCE-1736826 (to D.A.K. and M.Sc.), NSF-OCE-1736951 (to T.J.B.), NSF-OCE-1737199 (to M.T.W.) and NSF-OCE-1737351 (to S.P.S.G. and C.M.L.), NSF-OCE-1737155 (to C.R.N. and D.B.), and NERC NE/P005217/1 (to J.V.M.);

Funders	Funder number
Horizon 2020 Framework Programme	843011

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Globally distributed iridium layer preserved within the Chicxulub impact structure",

abstract = "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.",

author = "Steven Goderis and Honami Sato and Ludovic Ferri{\`e}re and Birger Schmitz and David Burney and Pim Kaskes and Johan Vellekoop and Axel Wittmann and Toni Schulz and Chernonozhkin, {Stepan M.} and Philippe Claeys and {de Graaff}, {Sietze J.} and Thomas D{\'e}hais and {de Winter}, {Niels J.} and Mikael Elfman and Feignon, {Jean Guillaume} and Akira Ishikawa and Christian Koeberl and Per Kristiansson and Neal, {Clive R.} and Owens, {Jeremy D.} and Martin Schmieder and Matthias Sinnesael and Frank Vanhaecke and {van Malderen}, {Stijn J.M.} and Bralower, {Timothy J.} and Gulick, {Sean P.S.} and Kring, {David A.} and Lowery, {Christopher M.} and Morgan, {Joanna V.} and Jan Smit and Whalen, {Michael T.} and {IODP-ICDP Expedition 364 Scientists}",

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AU - Goderis, Steven

AU - Sato, Honami

AU - Ferrière, Ludovic

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AU - Burney, David

AU - Kaskes, Pim

AU - Vellekoop, Johan

AU - Wittmann, Axel

AU - Schulz, Toni

AU - Chernonozhkin, Stepan M.

AU - Claeys, Philippe

AU - de Graaff, Sietze J.

AU - Déhais, Thomas

AU - de Winter, Niels J.

AU - Elfman, Mikael

AU - Feignon, Jean Guillaume

AU - Ishikawa, Akira

AU - Koeberl, Christian

AU - Kristiansson, Per

AU - Neal, Clive R.

AU - Owens, Jeremy D.

AU - Schmieder, Martin

AU - Sinnesael, Matthias

AU - Vanhaecke, Frank

AU - van Malderen, Stijn J.M.

AU - Bralower, Timothy J.

AU - Gulick, Sean P.S.

AU - Kring, David A.

AU - Lowery, Christopher M.

AU - Morgan, Joanna V.

AU - Smit, Jan

AU - Whalen, Michael T.

AU - IODP-ICDP Expedition 364 Scientists

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N2 - 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.

AB - 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.

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Globally distributed iridium layer preserved within the Chicxulub impact structure

Abstract

Bibliographical note

Funding

UN SDGs

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