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Absence of geochemical evidence for an impact event at the Bølling-Allerød/Younger Dryas transition

François S Paquay, Steven Goderis UGent, Greg Ravizza, Frank Vanhaecke UGent, Matthew Boyd, Todd A Surovell, Vance T Holliday, C Vance Jr Haynes and Philippe Claeys (2009) PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 106(51). p.21505-21510
abstract
High concentrations of iridium have been reported in terrestrial sediments dated at 12.9 ka and are interpreted to support an extraterrestrial impact event as the cause of the observed extinction in the Rancholabrean fauna, changes in the Paleoindian cultures, and the onset of the Younger Dryas cooling [Firestone RB, et al. (2007) Proc Natl Acad Sci USA 104:16016-16021]. Here, we report platinum group element (PGE: Os, Ir, Ru, Rh, Pt, Pd), gold (Au) concentrations, and Os-187/Os-188 ratios in time-equivalent terrestrial, lacustrine, and marine sections to seek robust evidence of an extraterrestrial contribution. First, our results do not reproduce the previously reported elevated Ir concentrations. Second, Os-187/Os-188 isotopic ratios in the sediment layers investigated are similar to average crustal values, indicating the absence of a significant meteoritic Os contribution to these sediments. Third, no PGE anomalies distinct from crustal signatures are present in the marine record in either the Gulf of California (DSDP 480, Guaymas Basin) or the Cariaco Basin (ODP 1002C). Our data show no evidence of an extraterrestrial (ET)-PGE enrichment anomaly in any of the investigated depositional settings investigated across North America and in one section in Belgium. The lack of a clear ET-PGE signature in this sample suite is inconsistent with the impact of a large chondritic projectile at the Bolling-Allerod/Younger Dryas transition.
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author
organization
alternative title
Absence of geochemical evidence for an impact event at the Bolling-Allerod/Younger Dryas transition
year
type
journalArticle (original)
publication status
published
subject
keyword
YOUNGER DRYAS, K-T BOUNDARY, Os isotopes, platinum group elements, Clovis, Pleistocene extinction, meteorite, MASS-SPECTROMETRY, GREENLAND ICE, CHONDRITIC IMPACTOR, ISOTOPIC COMPOSITION, METEORITIC NANODIAMONDS, PLATINUM-GROUP ELEMENTS, ABRUPT CLIMATE-CHANGE, CRETACEOUS-TERTIARY BOUNDARY
journal title
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Proc. Natl. Acad. Sci. USA
volume
106
issue
51
pages
21505 - 21510
Web of Science type
Article
Web of Science id
000272994200010
JCR category
MULTIDISCIPLINARY SCIENCES
JCR impact factor
9.432 (2009)
JCR rank
3/48 (2009)
JCR quartile
1 (2009)
ISSN
0027-8424
DOI
10.1073/pnas.0908874106
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
917168
handle
http://hdl.handle.net/1854/LU-917168
date created
2010-03-31 15:41:27
date last changed
2012-03-01 09:57:28
@article{917168,
  abstract     = {High concentrations of iridium have been reported in terrestrial sediments dated at 12.9 ka and are interpreted to support an extraterrestrial impact event as the cause of the observed extinction in the Rancholabrean fauna, changes in the Paleoindian cultures, and the onset of the Younger Dryas cooling [Firestone RB, et al. (2007) Proc Natl Acad Sci USA 104:16016-16021]. Here, we report platinum group element (PGE: Os, Ir, Ru, Rh, Pt, Pd), gold (Au) concentrations, and Os-187/Os-188 ratios in time-equivalent terrestrial, lacustrine, and marine sections to seek robust evidence of an extraterrestrial contribution. First, our results do not reproduce the previously reported elevated Ir concentrations. Second, Os-187/Os-188 isotopic ratios in the sediment layers investigated are similar to average crustal values, indicating the absence of a significant meteoritic Os contribution to these sediments. Third, no PGE anomalies distinct from crustal signatures are present in the marine record in either the Gulf of California (DSDP 480, Guaymas Basin) or the Cariaco Basin (ODP 1002C). Our data show no evidence of an extraterrestrial (ET)-PGE enrichment anomaly in any of the investigated depositional settings investigated across North America and in one section in Belgium. The lack of a clear ET-PGE signature in this sample suite is inconsistent with the impact of a large chondritic projectile at the Bolling-Allerod/Younger Dryas transition.},
  author       = {Paquay, Fran\c{c}ois S and Goderis, Steven and Ravizza, Greg and Vanhaecke, Frank and Boyd, Matthew and Surovell, Todd A and Holliday, Vance T and Haynes, C Vance Jr and Claeys, Philippe},
  issn         = {0027-8424},
  journal      = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA},
  keyword      = {YOUNGER DRYAS,K-T BOUNDARY,Os isotopes,platinum group elements,Clovis,Pleistocene extinction,meteorite,MASS-SPECTROMETRY,GREENLAND ICE,CHONDRITIC IMPACTOR,ISOTOPIC COMPOSITION,METEORITIC NANODIAMONDS,PLATINUM-GROUP ELEMENTS,ABRUPT CLIMATE-CHANGE,CRETACEOUS-TERTIARY BOUNDARY},
  language     = {eng},
  number       = {51},
  pages        = {21505--21510},
  title        = {Absence of geochemical evidence for an impact event at the B{\o}lling-Aller{\o}d/Younger Dryas transition},
  url          = {http://dx.doi.org/10.1073/pnas.0908874106},
  volume       = {106},
  year         = {2009},
}

Chicago
Paquay, François S, Steven Goderis, Greg Ravizza, Frank Vanhaecke, Matthew Boyd, Todd A Surovell, Vance T Holliday, C Vance Jr Haynes, and Philippe Claeys. 2009. “Absence of Geochemical Evidence for an Impact Event at the Bølling-Allerød/Younger Dryas Transition.” Proceedings of the National Academy of Sciences of the United States of America 106 (51): 21505–21510.
APA
Paquay, F. S., Goderis, S., Ravizza, G., Vanhaecke, F., Boyd, M., Surovell, T. A., Holliday, V. T., et al. (2009). Absence of geochemical evidence for an impact event at the Bølling-Allerød/Younger Dryas transition. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 106(51), 21505–21510.
Vancouver
1.
Paquay FS, Goderis S, Ravizza G, Vanhaecke F, Boyd M, Surovell TA, et al. Absence of geochemical evidence for an impact event at the Bølling-Allerød/Younger Dryas transition. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2009;106(51):21505–10.
MLA
Paquay, François S, Steven Goderis, Greg Ravizza, et al. “Absence of Geochemical Evidence for an Impact Event at the Bølling-Allerød/Younger Dryas Transition.” PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 106.51 (2009): 21505–21510. Print.