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.

Gabriele Carnevale, Vittorio Zanon, Ramón Casillas Ruiz, Agustina Ahijado Quintillán (2022). Microthermometry of fluid inclusions in calcite from Fuerteventura carbonatites: composition and formation conditions. GEOGACETA, 72, 31-34.

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

Gabriele Carnevale
Primo
;
2022-05-27

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.
Settore GEO/07 - Petrologia E Petrografia
https://sociedadgeologica.org/publicaciones/geogaceta/geogaceta-72-2022/
Gabriele Carnevale, Vittorio Zanon, Ramón Casillas Ruiz, Agustina Ahijado Quintillán (2022). Microthermometry of fluid inclusions in calcite from Fuerteventura carbonatites: composition and formation conditions. GEOGACETA, 72, 31-34.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/578652
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