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Acid sulphate alteration in a magmatic hydrothermal environment, Barton Peninsula, King George Island, Antarctica

Armstrong, Debbie C.. 1995 Acid sulphate alteration in a magmatic hydrothermal environment, Barton Peninsula, King George Island, Antarctica. Mineralogical Magazine, 59 (3). 429-441. 10.1180/minmag.1995.059.396.05

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Abstract/Summary

Volcanic-hosted advanced argillic alteration on Barton Peninsula comprises an assemblage of chalcedonic silica, alunite family minerals, pyrophyllite, pyrite, native sulphur, zunyite and rutile, characteristic of an acid sulphate-type epithermal system. The minerals minamiite, (Na0.36Ca0.27K0.1□0.27)Al3(SO4)2(OH)6, and zunyite, Al13Si5O20(OH,F)18Cl, are reported at this locality, and in Antarctica, for the first time. The WNW-striking, 1 km-long zone of alteration is hosted by early Tertiary andesitic rocks and contained in a 1.5 km-wide depression, rimmed by an arcuate ridge, probably representing a volcanic crater or small caldera structure.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1180/minmag.1995.059.396.05
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 14718022
Additional Keywords: volcanic -hosted argillic alteration, acid sulphate-type epithermal system, Antarctica
Date made live: 06 Dec 2016 12:01 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/515397

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