The significance of mid-Palaeozoic basement in Graham Land, Antarctic Peninsula

Milne, A.J.; Millar, I.L.. 1989 The significance of mid-Palaeozoic basement in Graham Land, Antarctic Peninsula. Journal of the Geological Society, 146 (2). 207-210. https://doi.org/10.1144/gsjgs.146.2.0207

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Official URL: http://dx.doi.org/10.1144/gsjgs.146.2.0207

Abstract/Summary

A mid-Palaeozoic basement to the Antarctic Peninsula is confirmed by a geochronological study of the gneissose country rock of the Mesozoic magmatic arc of eastern Graham Land. Rb–Sr whole-rock ages of 410 ± 15 and 426 ± 12 Ma from samples of orthogneiss indicate a previously unrecognized episode of granitic magmatism in the Antarctic Peninsula during the Silurian. Sm–Nd data on garnet–whole-rock pairs indicate that subsequent amphibolite facies metamorphism occurred in late Carboniferous times, probably as a result of plutonism.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1144/gsjgs.146.2.0207
ISSN:	0016-7649
NORA Subject Terms:	Earth Sciences
Date made live:	17 Oct 2018 11:15 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/521266

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1144/gsjgs.146.2.0207

ISSN:

0016-7649

NORA Subject Terms:

Earth Sciences

Date made live:

17 Oct 2018 11:15 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/521266