Hydrochemistry and stable isotopes in a coastal lagoon affected by evaporation, Cabo de Gata (Almería)
DOI:
https://doi.org/10.21701/bolgeomin/133.1/004Keywords:
Seawater, Halite, Precipitation, Salt pan, GypsumAbstract
The Salinas de Cabo de Gata are a natural coastal lagoon that has been anthropically transformed to favor the entry of seawater and its evaporation until saturation in sodium chloride. For this, it is compartmentalized in a series of ponds in which the seawater is guided by a circuit along which the salinity increases. Sediment samples have been taken at the bottom of these ponds and water samples to recognize which hydrogeochemical processes occur along the route. In the first ponds (evaporators) the suspended solids are decanted and carbonate precipitation occurs, along with the formation of pyrite linked to the high concentration of organic matter. On the other hand, in the last ponds (crystallizers) gypsum precipitation occurs when 70% evaporation is reached and, finally, halite when it reaches 90%. This precipitation notably changes the chemical composition of the waters, reducing the concentration of the ions present in the minerals that precipitate. From the isotopic point of view, gypsum precipitation also has its mark, reducing the proportions of 18O/16O and 2H/1H in the pond water. The study of these processes, in a mesoscale system, has great advantages for making palaeoenvironmental inferences at the basin scale, such as knowing what percentage of seawater must be evaporated so that gypsum or halite can precipitate in a basin.
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References
Boorsma, L. J. (1992). Syn-tectonic sedimentation in a Neogene strike-slip basin containing a stacked Gilbert-type delta (SE Spain). Sedimentary Geology, 81(1-2), 105-123. https://doi.org/10.1016/0037-0738(92)90059-Z
Cifuentes, G. R., Jiménez-Millán, J., Quevedo, C. P., and Jiménez-Espinosa, R. (2020). Transformation of s-bearing minerals in organic matter-rich sediments from a saline lake with hydrothermal inputs. Minerals, 10(6), 525, 1-14. https://doi.org/10.3390/min10060525
Daniele, L., Vallejos, A., Sola, F., Corbellá, M., and Pulido-Bosch, A. (2011). Hydrogeochemical processes in the vicinity of a desalination plant (Cabo de Gata, SE Spain). Desalination, 277, 338-347. https://doi.org/10.1016/j.desal.2011.04.052
Evans, N. P., Turchyn, A. V., Gázquez, F., Bontognali, T. R. R., Chapman, H. J., and Hodell, D. A. (2015). Coupled measurements of δ18O and δD of hydration water and salinity of fluid inclusions in gypsum from the Messinian Yesares Member, Sorbas Basin (SE Spain). Earth Planetary Science Letters, 430, 499-510. https://doi.org/10.1016/j.epsl.2015.07.071
Gràcia, E., Pallàs, R., Soto, J. I., Comas, M., Moreno, X., Masana, E., Santanach, P., Diez, S., García, M., and Dañobeitia, J. (2006). Active faulting offshore SE Spain (Alboran Sea): Implications for earthquake hazard assessment in the Southern Iberian Margin. Earth and Planetary Science Letters, 241, 735-749. https://doi.org/10.1016/j.epsl.2005.11.009
Harvey, A. M., Silva, P. G., Mather, A. E., Goy, J. L., Stokes, M., and Zazo, C. (1999). The impact of Quaternary sea-level and climatic change on coastal alluvial fans in the Cabo de Gata ranges, southeast Spain. Geomorphology, 28, 1-22. https://doi.org/10.1016/S0169-555X(98)00100-7
Levy, E. J., Yechieli, Y., Gavrieli, I., Lazar, B., Kiro, Y., Stein, M., and Sivan, O. (2018). Salt precipitation and dissolution in the late Quaternary Dead Sea: evidence from chemical and δ37Cl composition of pore-fluids and halites. Earth and Planetary Science Letters, 487, 127-137. https://doi.org/10.1016/j.epsl.2018.02.003
Lowenstein, T. K., and Hardie, L. A. (1985). Criteria for the recognition of salt-pan evaporites. Sedimentology, 32, 627-644. https://doi.org/10.1111/j.1365-3091.1985.tb00478.x
Lowenstein, T. K., Timofeeff, M. N., Brennan, S. T., Hardie, L. A., and Demicco, R. V. (2001). Oscillations in Phaneroizoic seawater chemistry: evidence from fluid inclusions. Science, 294, 1086-1088. https://doi.org/10.1126/science.1064280
Menció, A., Casamitjana, X., Mas-Pla, J., Coll, N., Compte, J., Martinoy, M., Pascual, J., and Quintana, X. D. (2017). Groundwater dependence of coastal lagoons: The case of La Pletera salt marshes (NE Catalonia). Journal of Hydrology, 552, 793-806. https://doi.org/10.1016/j.jhydrol.2017.07.034
Parkhurst, D. L., and Appelo, C. A. J. (1999). User's guide to PHREEQC (version 2) - a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations. U.S. Geological Survey Water-Resources Investigations Report, 99-4259. 312 p.
Reicherter, K., and Becker-Heidmann, P. (2009). Tsunami deposits in the western Mediterranean: Remains of the 1522 Almería earthquake? Geological Society Special Publication, 316, 217-235. https://doi.org/10.1144/SP316.14
Rutter, E. H., Burgess, R., and Faulkner, D. R. (2014). Constraints on the movement history of the carboneras fault zone (SE Spain) from stratigraphy and 40 Ar-39 Ar dating of neogene volcanic rocks. Geological Society Special Publication, 394(1), 79-99. https://doi.org/10.1144/SP394.5
Sanchez Martos, F., Molina-Sánchez, L., and Gisbert-Gallego, J. (2014). Groundwater-wetlands interaction in coastal lagoon of Almería (SE Spain). Environmental Earth Sciences, 71(1), 67-76. https://doi.org/10.1007/s12665-013-2695-2
Scotney, P., Burgess, R., and Rutter, E. H. (2000). 40 Ar/ 39 Ar age of the Cabo de Gata volcanic series and displacements on the Carboneras fault zone, SE Spain. Journal of the Geological Society, 157(5), 1003-1008. https://doi.org/10.1144/jgs.157.5.1003
Sofer, Z., and Gat, J.R. (1975). The isotope composition of evaporating brines: Effect of the isotopic activity ratio in saline solutions. Earth and Planetary Science Letters, 26, 179-186. https://doi.org/10.1016/0012-821X(75)90085-0
Sola, F., Vallejos, A., Daniele, L., and Pulido-Bosch, A. (2014). Identification of a Holocene aquifer-lagoon system using hydrogeochemical data. Quaternary Research, 82, 121-131. https://doi.org/10.1016/j.yqres.2014.04.012
Vallejos, A., Sola, F., Yechieli, Y., and Pulido-Bosch, A. (2018). Influence of the paleogeographic evolution on the groundwater salinity in a coastal aquifer. Cabo de Gata aquifer, SE Spain. Journal of Hydrology, 557, 55-66. https://doi.org/10.1016/j.jhydrol.2017.12.027
Yechieli, Y., and Wood, W.W. (2002). Hydrogeologic processes in saline systems: playas, sabkhas and saline lakes. Earth-Science Reviews, 58(3-4), 343-365. https://doi.org/10.1016/S0012-8252(02)00067-3
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Ministerio de Ciencia e Innovación
Grant numbers PID2019-108832GB-I00
