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Carbon-isotope stratigraphy of the Furongian Berry Head Formation (Port au Port Group) and Tremadocian Watts Bight Formation (St. George Group), western Newfoundland, and the correlative significance

Sebastian Scorrer, Karem Azmy and Svend Stouge
Carbon-isotope stratigraphy of the Furongian Berry Head Formation (Port au Port Group) and Tremadocian Watts Bight Formation (St. George Group), western Newfoundland, and the correlative significance (in Advances in low-temperature geochemistry, diagenesis, and seawater and climate evolution through the Earth's history; a tribute to Jan Veizer, Ihsan S. Al-Aasm (editor), Karem Azmy (editor) and Thomas Steuber (editor))
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (March 2019) 56 (3): 223-234

Abstract

Carbon-isotope stratigraphy of the Furongian (stage 10; Upper Cambrian) and Tremadocian (lowermost Ordovician) reveals distinct variations from the carbonates of the Berry Head and Watts Bight formations of the East Isthmus Bay section that accumulated in a shallow-marine setting on the eastern Laurentian platform in a passive margin setting in western Newfoundland, Canada. The East Isthmus Bay delta (super 13) C values show insignificant correlation with their Sr (R (super 2) = 0.04), Mn (R (super 2) = 0.001) and Fe (R (super 2) = 0.02) counterparts, implying preservation of at least near-primary C-isotope compositions. The investigated section is largely fossil poor, but the delta (super 13) C profile shows a pattern with distinct variations that can be matched with those of the western Laurentian Lawson Cove Auxiliary Boundary Stratigraphic Section and Point (ASSP) section, Utah, USA. Therefore, it was possible to reconstruct a conodont biozonal scheme by matching the delta (super 13) C profile with its counterpart from the Lawson Cove ASSP section. At the base of the East Isthmus Bay section, the delta (super 13) C profile exhibits a broad excursion (the top of the Herllnmaria - Red Tops Boundary), which can be matched with the base of the Eoconodontus Zone (mid-Furongian), followed by an enrichment trend through the Cordylodus intermedius Zone (top Furongian). A positive excursion (Hirsutodontus simplex spike) is recorded in the Cordylodus intermedius Zone (top Cambrian), and a prominent positive peak characteristic for the ordylodus lindstromi Zone is recorded from the top of the investigated section. The delta (super 13) C values of the Newfoundland carbonates are generally approximately 1 ppm Vienna Pee Dee Belemnite lower than those of Lawson Cove, which is likely attributable to a relatively higher productivity and (or) organic burial in the Utah region.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 56
Serial Issue: 3
Title: Carbon-isotope stratigraphy of the Furongian Berry Head Formation (Port au Port Group) and Tremadocian Watts Bight Formation (St. George Group), western Newfoundland, and the correlative significance
Title: Advances in low-temperature geochemistry, diagenesis, and seawater and climate evolution through the Earth's history; a tribute to Jan Veizer
Author(s): Scorrer, SebastianAzmy, KaremStouge, Svend
Author(s): Al-Aasm, Ihsan S.editor
Author(s): Azmy, Karemeditor
Author(s): Steuber, Thomaseditor
Affiliation: Memorial University of Newfoundland, Department of Earth Sciences, Saint John's, NL, Canada
Affiliation: University of Windsor, Department of Earth and Environmental Sciences, Windsor, ON, Canada
Pages: 223-234
Published: 201903
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 53
Accession Number: 2019-032094
Categories: StratigraphyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendix
Illustration Description: illus. incl. strat. col., 1 table, geol. sketch map
N48°32'60" - N48°32'60", W58°42'00" - W58°42'00"
Secondary Affiliation: University of Copenhagen, DNK, Denmark
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from Canadian Science Publishing, NRC Research Press, Ottawa, ON, Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201917
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