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. 10.1144/gsjgs.146.2.0207
Full text not available from this repository. (Request a copy)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): | 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 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year