Electrical Resistivity Anomalies Offshore a Carbonate Coastline: Evidence for Freshened Groundwater?
| Autor: | Francesco Chidichimo, Lorenzo Petronio, Jens Karstens, Chibuzo Valeria Ahaneku, Enzo Rizzo, Christian Berndt, Katrin Schwalenberg, Nicoletta Fusi, Michele De Biase, Michel Kühn, Zahra Faghih, Bradley A. Weymer, Amir Haroon, Xavier Garcia, Aaron Micallef, Marion Jegen |
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| Přispěvatelé: | Haroon, A, Micallef, A, Jegen, M, Schwalenberg, K, Karstens, J, Berndt, C, Garcia, X, Kuhn, M, Rizzo, E, Fusi, N, Ahaneku, C, Petronio, L, Faghih, Z, Weymer, B, De Biase, M, Chidichimo, F, European Commission, Agencia Estatal de Investigación (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Submarine topography
010504 meteorology & atmospheric sciences Ocean bottom Marine resources development Geochemistry Hydrogeology Ambientale Environmental mapping 010502 geochemistry & geophysics 01 natural sciences Data availability chemistry.chemical_compound Geophysics chemistry Electrical resistivity and conductivity Geophysics Malta Hydrogeological model electrical resistivity anomalies General Earth and Planetary Sciences Carbonate Table (landform) Submarine pipeline 14. Life underwater Groundwater Geology 0105 earth and related environmental sciences |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Digital.CSIC: Repositorio Institucional del CSIC Consejo Superior de Investigaciones Científicas (CSIC) |
| Popis: | 10 pages, 3 figures, 1 table, supporting information https://doi.org/10.1029/2020GL091909.-- Data Availability Statement: Data for this research are available at http://doi.org/10.5281/zenodo.4304549 Carbonate lithologies host considerable quantities of the Earth¿s freshwater resources and partially supply a quarter of the global population with drinkable water. Carbonates constitute substantial amounts of the global coastlines, yet it is not known if and how they can sustain freshened groundwater offshore. Here, we use controlled source electromagnetic, seismic reflection, and core sample data to derive a lithological model for the eastern margin of the Maltese Islands and identify four distinct resistivity anomalies within the Upper Coralline Limestone, Globigerina Limestone, and Blue Clay formations. The anomalies hosted in the former are likely associated to low porosities, whereas the anomaly within the latter is indicative of pore fluid freshening. Hydrogeological modeling suggests that freshened pore fluids, emplaced during sea-level lowstands and preserved in low permeability units, are potentially still found within carbonate shelves. However, resource potential is low due to its relict nature and low permeability host environment This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Program (grant agreement no 677898; MARCAN). [...] Open access funding enabled and organized by Projekt DEAL. [...] With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S) |
| Databáze: | OpenAIRE |
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