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Al-free gyrolite from the Lizard, Cornwall, England

Published online by Cambridge University Press:  05 July 2018

N. J. Elton ,
J. J. Hooper  and
V. A. D. Holyer
N. J. Elton
Affiliation:
Tregears, Little Treviscoe, St Austell, Cornwall PL26 7QL
J. J. Hooper
Affiliation:
48 St Julitta, Luxulyan, Bodmin, Cornwall PL30 5ED
V. A. D. Holyer
Affiliation:
The Cornerstone, 7 Tregonning Park, St Keverne, Helston, Cornwall TR12 6QT
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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.

Keywords

zeolitegyroliteLizardCornwall
Type
Research Article
Information
Mineralogical Magazine , Volume 62 , Issue 2 , April 1998 , pp. 271 - 272
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1998

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