Age of magnetization of the Axelgold Gabbro, north-central British Columbia

Saved in:
Online Access: Get full text
doi: 10.1139/e85-123
Authors:Armstrong, Richard Lee; Monger, James W. H.; Irving, E.
Author Affiliations:Primary:
Univ. B.C., Dep. Geol. Sci., Vancouver, BC, Canada
Other:
Geol. Surv. Can., Canada
Pac. Geosci. Cent., Canada
Volume Title:Canadian Journal of Earth Sciences Revue Canadienne des Sciences de la Terre
Source:Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre, 22(8), p.1217-1222. Publisher: National Research Council of Canada, Ottawa, ON, Canada. ISSN: 0008-4077
Publication Date:1985
Note:In English with French summary. 21 refs.; illus. incl. 3 tables, geol. sketch map
Summary:K/Ar and Rb/Sr dates ranging from 101 + or - 2 to 158 + or - 6 m.y. are reviewed to arrive at an absolute minimum age of 115 + or - 119 m.y. and probable age of 125 + or - 5 m.y. for the Axelgold gabbro, consistent with geological evidence. The magnetization with blocking T of 500-600°C, was almost certainly acquired between these limits. The results provide an important constraint on the determination of the palaeolatitudinal displacement of the Axelgold gabbro with respect to the craton, and supports the earlier contention of Monger & Irving that post-mid-Cretaceous displacement from the south was >1000 km. [J.M.H.]
Subjects:Cretaceous; Gabbros; Geochronology; Igneous rocks; K/Ar; Lower Cretaceous; Magnetic properties; Mesozoic; Paleolatitude; Paleomagnetism; Plutonic rocks; Rb/Sr; British Columbia; Canada; Western Canada; Axelgold Gabbro; North-central British Columbia
Coordinates:N560000 N563000 W1260000 W1263000
Abstract Numbers:86M/1245
Record ID:1985083937
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Tags: Add Tag
No Tags, Be the first to tag this record!