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Apophyllite and other zeolite-type minerals from the Whin Sill of the northern Pennines

Published online by Cambridge University Press:  05 July 2018

B. Young ,
A. Dyer ,
N. Hubbard  and
R. E. Starkey
B. Young
Affiliation:
British Geological Survey, Windsor Court, Windsor Terrace, Newcastle upon Tyne NE2 4HB
A. Dyer
Affiliation:
Department of Chemistry and Applied Chemistry, University of Salford, Salford, M5 4WT
N. Hubbard
Affiliation:
122 Cordery Road, Evington, Leicester LE5 6DF
R. E. Starkey
Affiliation:
15 Warwick Avenue, Fringe Green, Bromsgrove, Worcestershire B60 2AH
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Abstract

Apophyllite, analcite, chabazite, prehnite and stilbite are described from pectolite-, chlorite-, calcite- and quartz-bearing veins and joint coatings in the late Carboniferous quartz dolerite of the Whin Sill of the northern Pennines. These veins represent the final hydrothermal stages in the sill's emplacement and are not related to the widespread lead-zinc-barium-fluorite mineralization of the northern Pennine orefield. Thermogravimetric studies of apophyllites from the two Whin Sill occurrences reveal that at one locality the minreal is fluorapophyllite, at the other hydroxyapophyllite.

Keywords

analciteapophyllitechabazitenorthern Penninespectoliteprehnitethermogravimetric analysisWhin Sill
Type
Mineralogy and Geochemistry
Information
Mineralogical Magazine , Volume 55 , Issue 379 , June 1991 , pp. 203 - 207
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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