Microthermometry of fluid inclusions in calcite from Fuerteventura carbonatites: composition and formation conditions

Authors

  • Gabriele Carnevale Dipartimento di Scienze della Terra e del Mare, Università degli Studi di Palermo (Italia)
  • Vittorio Zanon Instituto de Investigação em Vulcanologia e Avaliação de Riscos, Universidade dos Açores (Portugal)
  • Ramón Casillas-Ruiz Dpto. Biología Animal, Edafología y Geología, Universidad de La Laguna, Santa Cruz de Tenerife.
  • Agustina Ahijado-Quintanilla Dpto. Biología Animal, Edafología y Geología, Universidad de La Laguna, Santa Cruz de Tenerife.

DOI:

https://doi.org/10.55407/geogaceta98412

Keywords:

carbonatires, microthermometry, fluid inclusions, Fuerteventura, Canary Islands

Abstract

The petrographic analysis in calcite minerals in carbonatitic dykes from Fuerteventura Basal Complex (Ajuy, Punta de la Nao) shows the presence of isolated primary fluid inclusions, corroborating their magmatic origin instead of a late-stage origin. Micro-thermometric studies in calcite show a restricted range of apparent eutectic temperature (Te*= -21.7 – -21.0 °C) and final ice melting temperatures (Tim= -3.2 – -2.1. °C). Homogenization temperatures and pressures are in the range of 140-210 °C and 4-16 bars respectively. Our results suggest the binary NaCl-H2O system as a characterizing chemical system in studied fluid inclusions, with the presence of low salinity fluids (≈5 wt. % NaCleq), probably related with fluid/ rock interactions.

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Published

2022-12-11

How to Cite

Carnevale, G., Zanon, V., Casillas-Ruiz, R., & Ahijado-Quintanilla, A. (2022). Microthermometry of fluid inclusions in calcite from Fuerteventura carbonatites: composition and formation conditions . GEOGACETA, 72, 31–34. https://doi.org/10.55407/geogaceta98412

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Vol. 72 (2022): July_December

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Artículos

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