Absence of Extraterrestrial 3He in Permian–Triassic Age Sedimentary Rocks

• Published in: Earth and Planetary Science Letters
• Main Authors: Farley, K. A., Ward, P., Garrison, G., Mukhopadhyay, Sujoy
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier Science BV 2005
• Subjects: fullerene; Permian-Triassic boundary; cosmic dust; extraterrestrial helium; Canada; Graphite Peak; Antarc*; Antarctica
• Online Access: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4725619; https://doi.org/10.1016/j.epsl.2005.09.054

Helium concentration and isotopic composition were measured in a suite of samples across the Permian–Triassic boundary at Opal Creek, Canada, to determine whether high extraterrestrial helium concentrations are associated with a possible extinction-inducing impact event at this time. No extraterrest...