Laumontita y Prehnita en la formación submarina del Complejo Basal de La Palma, Islas Canarias
- A. La Iglesia 1
- S. Fernandez Santín 2
- A. Hernandez-Pacheco 2
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1
Instituto de Geología Económica
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Instituto de Geología Económica
Madrid, España
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2
Universidad Complutense de Madrid
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ISSN: 0214-2708
Year of publication: 1996
Volume: 9
Issue: 1-2
Pages: 67-74
Type: Article
More publications in: Revista de la Sociedad Geológica de España
Abstract
A zeolite belonging to the submarine volcanic formation of La Palma, Canary lslands, is studied by means of microprobe analysis, optical microscopy, XR diffraction, differential thermal analysis, thermogravimetry and infrared spectroscopy. The analytical data confirm the identity of this zeolite as laumontite. Also, the mineral prehnite has been found. An activity diagram for three components (aSi04H4, aCa++ and aH+) in the temperature interval of 25-300ºC is constructed, showing the stability fields of heulandite, prehnite, laumontite, calcite and quartz. This diagram as well as that with the solubility of prehnite and laumontite allow us to estimate the formation conditions of both minerals of La Palma.