Early Silurian (Wenlockian) δ13C profiles from the Cape Phillips Formation, Arctic Canada and their relation to biotic events

Content Provider	Semantic Scholar
Author	Noble, P. J. Zimmerman, Matthew K. Holmden, Chris Lenz, Alfred C.
Copyright Year	2005
Abstract	Geochemical data from the Cape Phillips Formation, Arctic Canada, are examined in association with three Silurian biotic crises in the graptolite community; the early Wenlockian Ireviken, mid Wenlockian Cyrtograptus lundgreni, and end Wenlockian Colonograptus ludensis extinction events. Positive δ13Corg excursions are associated with the Ireviken and C. lundgreni events, but not the Co. ludensis Event. The Ireviken and C. lundgreni excursions are recognized worldwide and are herein interpreted to be the result of carbonate weathering in response to eustatic sea-level drop. The C. lundgreni excursion is of greater magnitude in the more proximal basin margin section at Abbott River, Cornwallis Island, and is explained by the amplification of a more strongly positive δ13C signature in shallower parts of an epeiric basin during increased exposure and weathering of the carbonate shelf. Excursion C5, within the C. praedeubeli – C. deubeli Zone, is also of regional significance, as it occurs in both the Abbott R...
Starting Page	1419
Ending Page	1430
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1139/e05-055
Volume Number	42
Alternate Webpage(s)	http://sil.usask.ca/Holmden/list_2/noble_et_al_2005_cjes.pdf
Alternate Webpage(s)	https://doi.org/10.1139/e05-055
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article