Start |Author Index | View Uploaded Presentations | Meeting Information

Northeastern Section - 48th Annual Meeting (18–20 March 2013)

Paper No. 5
Presentation Time: 8:00 AM-12:00 PM

ACADIAN OROGENESIS IN CENTRAL NEWFOUNDLAND


VALVERDE-VAQUERO, Pablo, Instituto Geológico y Minero de España (IGME), La Calera 1, Tres Cantos (Madrid), 28760, Spain, VAN STAAL, Cees R., Geological Survey of Canada, 625 Robson Street, Vancouver, BC V6B 5J3, Canada, DUNNING, Greg, Department of Earth Sciences, Memorial University of Newfoundland (MUN), St. John's, NF A1B 3X5, Canada and MCNICOLL, V., Geol Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada, p.valverde@igme.es

Early Devonian orogenic activity (Acadian sensu stricto) in the Newfoundland Appalachians produced significant metamorphism and plutonism in the southern and eastern parts of the Central Mobile Belt (Gander Zone and Exploits Subzone). This is marked by the formation of the Meelpaeg metamorphic nappe. U-Pb and Ar-Ar dating in central Newfoundland have revealed that the Meelpaeg Subzone (Gander+Exploits) was part of the Acadian high-grade infrastructure, while the nearby Mount Cormack metamorphic complex was in the superstructure and escaped Siluro-Devonian overprint. Thus, the Acadian event appears to be the result of the formation of this “hot-nappe” at 420-411 Ma, and its final west-directed thrusting at ca. 404-400 Ma.

Session No. 37--Booth# 5

S3. The Northern Appalachians: What Have We Learned in the Past 40 Years? A Symposium in Honor of J. Christopher Hepburn (Posters)
Tuesday, 19 March 2013: 8:00 AM-12:00 PM
Grand Ballroom South (Omni Mount Washington Resort)
Geological Society of America Abstracts with Programs. Vol. 45, No. 1, p.91
© Copyright 2013 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.
Back to: S3. The Northern Appalachians: What Have We Learned in the Past 40 Years? A Symposium in Honor of J. Christopher Hepburn (Posters)
<< Previous Abstract | Next Abstract