Refining 2 km of Ordovician chronostratigraphy beneath Anticosti Island utilizing integrated chemostratigraphy

Patrick I. McLaughlin; Poul Emsbo; Andre Desrochers; Alyssa Bancroft; Carlton E. Brett; John F. Riva; Wayne Premo; Leonid Neymark; Aicha Achab; Esther Asselin; M. Matthew Emmons

doi:10.1139/cjes-2015-0242

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Refining 2 km of Ordovician chronostratigraphy beneath Anticosti Island utilizing integrated chemostratigraphy

Journal article

Peer reviewed

Refining 2 km of Ordovician chronostratigraphy beneath Anticosti Island utilizing integrated chemostratigraphy

Patrick I. McLaughlin, Poul Emsbo, Andre Desrochers, Alyssa Bancroft, Carlton E. Brett, John F. Riva, Wayne Premo, Leonid Neymark, Aicha Achab, Esther Asselin, …

Canadian journal of earth sciences, Vol.53(8), pp.865-874

08/01/2016

DOI: 10.1139/cjes-2015-0242

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Abstract

New high-resolution chemostratigraphy, in combination with updated biostratigraphy, refines the chronostratigraphic resolution of the nearly 2 km thick Ordovician section below Anticosti Island. A total of 1414 horizons, spaced at 1.0-1.5 m intervals, were sampled from the New Associated Consolidated Paper (NACP) drill core and analyzed for major and trace elemental composition by portable X-ray fluorescence analyzer (pXRF). Select micrite and calcareous shale powders were then analyzed for delta C-13(carb) (number of samples, N = 364) and Sr-87/Sr-86 (N = 25). Our results indicate a Floian to early Darriwilian (F3-Dw1) age for the Romaine Formation, a middle Darriwilian to Sandbian (Dw2-Sa1) age for the Mingan Formation, a lower to mid-Katian (Ka1-Ka2) age for the Macasty Formation, an upper Katian (Ka3) age for the lower Vaureal Formation, an uppermost Katian (Ka4) age for the upper Vaureal, and a Hirnantian (H1) age for the Ellis Bay Formation. This integrated chemostratigraphic and biostratigraphic synthesis establishes the position of numerous unconformities, the duration of the intervening depositional sequences, and rates of sedimentation.

Geology

Geosciences, Multidisciplinary

Physical Sciences

Science & Technology

Details

Title: Subtitle: Refining 2 km of Ordovician chronostratigraphy beneath Anticosti Island utilizing integrated chemostratigraphy
Creators: Patrick I. McLaughlin - Indiana Geological and Water Survey
Poul Emsbo - United States Geological Survey
Andre Desrochers - University of Ottawa
Alyssa Bancroft - University of Iowa
Carlton E. Brett - University of Cincinnati
John F. Riva - Institut National de la Recherche Scientifique
Wayne Premo - United States Geological Survey
Leonid Neymark - United States Geological Survey
Aicha Achab - Institut National de la Recherche Scientifique
Esther Asselin - Natural Resources Canada
M. Matthew Emmons - United States Geological Survey
Resource Type: Journal article
Publication Details: Canadian journal of earth sciences, Vol.53(8), pp.865-874
DOI: 10.1139/cjes-2015-0242
ISSN: 0008-4077
eISSN: 1480-3313
Publisher: Canadian Science Publishing
Number of pages: 10
Language: English
Date published: 08/01/2016
Academic Unit: Earth and Environmental Sciences; Iowa Geological Survey; IIHR--Hydroscience and Engineering
Record Identifier: 9984702729402771

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