K-Ar geochronology of the South Shetland Islands, Lesser Antarctica: apparent lateral migration of Jurassic to Quaternary island arc volcanism

Pankhurst, R.J.; Smellie, John L.. 1983 K-Ar geochronology of the South Shetland Islands, Lesser Antarctica: apparent lateral migration of Jurassic to Quaternary island arc volcanism. Earth and Planetary Science Letters, 66. 214-222. 10.1016/0012-821X(83)90137-1

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Official URL: http://dx.doi.org/10.1016/0012-821X(83)90137-1

Abstract/Summary

Approximately 70 K-Ar whole-rock ages for low-K tholeiitic and andesitic volcanic and intrusive rocks from the South Shetland Islands, Antarctica, including about 50 not previously published, are reviewed. Activity mainly spanned the range 130 to 30 Ma (Jurassic/Cretaceous to Oligocene/Miocene) with a very recent (∼ 2 Ma), more alkaline, renewal. Throughout the main period of activity magmatism (or, perhaps, its cessation) migrated continuously northeastwards along the length of the island chain.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/0012-821X(83)90137-1
ISSN:	0012821X
NORA Subject Terms:	Earth Sciences
Date made live:	09 Jul 2019 07:41 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/524210

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/0012-821X(83)90137-1

ISSN:

0012821X

NORA Subject Terms:

Earth Sciences

Date made live:

09 Jul 2019 07:41 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/524210