AGE AND PALEOMAGNETIC STUDIES FOR INTRUSIVE AND METAMORPHIC ROCKS FROM THE SØR RONDANE MOUNTAINS, ANTARCTICA

Two ^<40>Ar-^<39>Ar and five K-Ar ages and the virtual geomagnetic pole (VGP) were obtained for metadolerite dikes and gneiss at three sites, 1550 Nunatak, Brattnipane and Austkampane of the Sør Rondane Mountains, Antarctica. The radiometric age of 1550 Nunatak was determined to be 440-4...

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Bibliographic Details
Main Authors: Yutaka TAKIGAMI, Ichiro KANEOKA, Minoru FUNAKI
Format: Report
Language:English
Published: Geophysical Institute, Faculty of Science, University of Tokyo 1987
Subjects:
Sør-Rondane
Sør Rondane Mountains
Austkampane
Brattnipane
Antarc*
Antarctica
Geomagnetic Pole
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2540
http://id.nii.ac.jp/1291/00002540/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2540&item_no=1&attribute_id=18&file_no=1
Description
Summary:Two ^<40>Ar-^<39>Ar and five K-Ar ages and the virtual geomagnetic pole (VGP) were obtained for metadolerite dikes and gneiss at three sites, 1550 Nunatak, Brattnipane and Austkampane of the Sør Rondane Mountains, Antarctica. The radiometric age of 1550 Nunatak was determined to be 440-450 Ma, which is the youngest one so far reported in this area. The obtained VGP is similar to those estimated from rocks of the other area in Antarctica in Cambrian-Ordovician age, but is different from that reported by J.D.A. ZIJDERVELD (J. Geophys. Res., 73,3773,1968).

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