Zeolitas (clinoptilolita-analcima-filipsita) en depósitos piroclásticos miocenos del borde de la Caldera de Tejeda (Gran Canaria, Islas Canarias)

  1. M.A. García del Cura 1
  2. A. La Iglesia 1
  3. S. Ordóñez 2
  1. 1 Instituto de Geología Económica
    info

    Instituto de Geología Económica

    Madrid, España

  2. 2 Universitat d'Alacant
    info

    Universitat d'Alacant

    Alicante, España

    ROR https://ror.org/05t8bcz72

Revista:
Revista de la Sociedad Geológica de España

ISSN: 0214-2708

Ano de publicación: 1999

Volume: 12

Número: 2

Páxinas: 229-240

Tipo: Artigo

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Outras publicacións en: Revista de la Sociedad Geológica de España

Resumo

This paper deals with the chemical and mineralogical composition of the Miocene blue-green tuffs (regionally called “azulejos”) from the western border of the Caldera de Tejeda (Gran Canaria). Petrographic observation, X ray diffraction, scanning (SEM) and transmission electron microscopy (TEM), thermal analysis and chemical determinations by both X ray fluorescence and EDAX microanalyser adapted to SEM allow identification of the following minerals: feldspars (mainly anorthoclase) , mica, dolomite, quartz, cristobalite, clay minerals (smectite and corrensite), and the zeolites: clinoptilolite, analcime and phillipsite. The arrangement of these minerals along with the Fe-rich dolomite and Ca-poor character of clinoptilolite support a genetic pattern of the zeolites by moderately hot waters (possible convective cells) in which meteoric waters were heated.

Fonte de datos: Dialnet