Microthermometry of fluid inclusions in calcite from Fuerteventura carbonatites: composition and formation conditions
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, corrobora-ting their magmatic origin instead of a late-stage origin. Micro-ther-mometric studies in calcite show a res...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/23772 |
| Acceso en línea: | https://hdl.handle.net/10272/23772 |
| Access Level: | acceso abierto |
| Palabra clave: | Microthermometry Fluid inclusions Fuerteventura Canary Islands Carbonatites Carbonatitas Microtermometría Inclusiones fluidas Canarias |
| Sumario: | 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, corrobora-ting their magmatic origin instead of a late-stage origin. Micro-ther-mometric 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 respecti-vely. Our results suggest the binary NaCl-H2O system as a characte-rizing 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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