Origen de escapolitas asociadas a doleritas triásicas del Norte de la provincia de Cádiz.

• D. Morata ^[1] ; S. Domínguez-Bella ^[1] ; S. Morales ^[2]
  1. [1] Universidad de Cádiz

     Universidad de Cádiz

     Cádiz, España

     
  2. [2] I.A.C.T. y Dpto. Mineralogía y Petrología. Facultad de Ciencias. C SIC-Universidad de Granada. Avda. Fuentenueva s/n. 18002 Granada.
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 7, 1996, págs. 1527-1530
• Idioma: español
• Títulos paralelos:
  • Scapolites origin associated to Triassic dolerites from North of Cádiz province.
• Enlaces
  • Texto Completo Ejemplar
• Resumen

  • Scapolites are present in sorne doleritic tectonic blocks ("ophites" )in the External Zones of the Betic Cordilleras, in Northern of Cádiz province. These scapolites fill veinlets and replace plagioclases from the dolerites in the proximity off fissures. Scapolites (Me 26-29) are partial or totally replaced by low-iron prehnites (Xfe3+ = 0.13-0. 66). Fluid inclusions found in scapolites show high salinity (40-55% wt. eq.) multications (Na-Ca-K.?) aqueous fluids. No volatil phases has been detected in microthermometric runs. Temperatures of homogeneization range from 380 to 540ºC. These scapolites filling dolerite veinlets are interpreted as a result of magma-evaporite interactions during dolerite emplacement intó the Triassic evaporitic formations.