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Al-free gyrolite from the Lizard, Cornwall, England
Published online by Cambridge University Press: 05 July 2018
Abstract
Gyrolite containing no detectable Al (<0.04 wt.%) has been found as aggregates of platey crystals to 6 mm at Dean Quarry, the Lizard, Cornwall. The gyrolite occurs embedded in calcite which fills a fracture vein in gabbro. Paragenetic evidence is inconclusive, but suggests that gyrolite formed relatively early, after prehnite, and possibly around the same time as analcime and natrolite.
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- Copyright © The Mineralogical Society of Great Britain and Ireland 1998
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