RB-SR AGES OF LAMPROPHYRE DYKES FROM SCHIRMACHER OASIS, QUEEN-MAUD-LAND, EAST ANTARCTICA

Authors
DAYAL AM HUSSAIN SM
Citation
Am. Dayal et Sm. Hussain, RB-SR AGES OF LAMPROPHYRE DYKES FROM SCHIRMACHER OASIS, QUEEN-MAUD-LAND, EAST ANTARCTICA, Journal of the Geological Society of India, 50(4), 1997, pp. 457-460
Citations number
12
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Journal of the Geological Society of India → ACNP
ISSN journal
00167622
Volume
50
Issue
4
Year of publication
1997
Pages
457 - 460
Database
ISI
SICI code
0016-7622(1997)50:4<457:RAOLDF>2.0.ZU;2-2
Abstract
Lamprophyre dykes intrude the late Proterozoic metamorphic terrain of Schirmacher Oasis, Queen Maud Land, East Antarctica. Rb-Sr whole-rock/ mineral isochron ages of two lamprophyre dykes are 455 +/- 12 Ma (Sr-i = 0.70886 +/- 5) and 458 +/- 6 Ma (Sr-i = 0.71388 +/- 98). This lampr ophyre dyke activity of Schirmacher Oasis, may be interpreted as a man ifestation of post orogenic alkaline magmatism related to the Ross oro geny of the Transantarctic mountains.