Microthermometry of fluid inclusions in calcite from Fuerteventura carbonatites: composition and formation conditions
DOI:
https://doi.org/10.55407/geogaceta98412Keywords:
carbonatires, microthermometry, fluid inclusions, Fuerteventura, Canary IslandsAbstract
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.
References
Bakker, R.J. (2003). Chemical Geology 194, 3-23. https://doi.org/10.1016/S0009-2541(02)00268-1
Bodnar, R.J. (1993). Geochimica et Cosmochimica Acta 57, 683-684. https://doi.org/10.1016/0016-7037(93)90378-A
Bodnar, R.J. (2003). In: Fluid Inclusions: Analysis and Interpretation (I.Samson, A.Anderson and D.Marshall, Eds.). Mineralogical Association of Canada, Short-Course series 32, 213-230.
Bodnar, R.J. y Vityk, M.O (1994). In: Fluid Inclusions in Minerals: Methods and Applications (B.De Vivo and M.L.Frezzotti, Eds.). Blacksburg, VA, 117-130.
Carnevale, G., Arroyo Rey, X., Correale, A. y Rotolo, S.G. (2020). Geogaceta 69, 23-26.
Carnevale, G., Caracausi, A., Correale, A., Italiano, L. and Rotolo, S.G. (2021). Minerals 11 (2), 203. https://doi.org/10.3390/min11020203
Chi, G., Diamond, L.W., Lu, H., Lai, J. y Chu, H. (2021). Minerals 11 (1), 7. https://doi.org/10.3390/min11010007
Mangas, J., Pérez-Torrado, F.J., Reguilón, R.M. y Martín-Izard, A. (1997). In: Mineral Deposits, Papunen (ed). Balkema, Rotterdam, 475-478.
Randive, K.R., Hari, K.R., Dora, M.L., Malpe, D.B. y Bhondwe, A.A. (2014). Gondwana Geological Magazine 29 (1-2), 19-28
Shu, X. y Liu, Y. (2019). Ore Geology Reviews 107, 41-57. https://doi.org/10.1016/j.oregeorev.2019.02.014
Walter, B.F., Steele-MacInnis, M., Giebel, R.J., Marks, M.A.W. y Markl, G. (2020). Geochimica et Cosmochimica Acta 277, 224-242. https://doi.org/10.1016/j.gca.2020.03.030
Downloads
Published
How to Cite
Issue
Section
License
Until the year 2023 the author assigned the copyright to the Sociedad Geológica de España, but from 2024 the author retains the copyright and grants the Sociedad Geológica de España the right of first publication and non-exclusive distribution of each article in all current or future media, while transferring, also non-exclusively, the commercial rights for the distribution of the printed version of Geogaceta. On the other hand, the articles, from the year 2023, are available simultaneously with their publication, under the Creative Commons CC BY-NC-SA 4.0 license, which allows copying, transforming the work, but if any transformation is distributed, the new work must be distributed under the same license, and never for commercial purposes, while acknowledging the authorship and original publication in GEOGACETA, so that the only role of copyright is to give authors control over the integrity of their works and the right to be properly acknowledged and cited.
