Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction
The aseismic Nazca Ridge produces localized flat-slab subduction beneath the South American margin at latitudes 10° to 15° S. The geological evolution and the spatio-temporal pattern of deformation of the upper plate have been strongly influenced by the presence of the flat slab. In this study, we i...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/23/7697 |
| _version_ | 1827592407090200576 |
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| author | Sara Ciattoni Stefano Mazzoli Antonella Megna Matteo Basilici Stefano Santini |
| author_facet | Sara Ciattoni Stefano Mazzoli Antonella Megna Matteo Basilici Stefano Santini |
| author_sort | Sara Ciattoni |
| collection | DOAJ |
| description | The aseismic Nazca Ridge produces localized flat-slab subduction beneath the South American margin at latitudes 10° to 15° S. The geological evolution and the spatio-temporal pattern of deformation of the upper plate have been strongly influenced by the presence of the flat slab. In this study, we investigated the lithospheric thermal structure of this region by elaborating a 2D geothermal model along a section across the top of the Nazca Ridge, the Peru–Chile trench, the Andean Cordillera, and the Amazonian Basin, for a total length of 1000 km. For the sake of modelling, the crust of the overriding plate was subdivided into two parts, i.e., a sedimentary cover (including the entire lithostratigraphic sequence) and a crystalline basement. Applying an analytical methodology, we calculated geotherms and isotherms by setting (i) thickness, (ii) density, (iii) heat production, and (iv) thermal conductivity for each geological unit and considering (v) heat flux at the Moho, (vi) frictional heating produced by faults, and (vii) plate convergence rate. The resulting model could make a significant advance in our understanding of how flat slab geometry associated with the Nazca Ridge subduction affects the thermal structure and hence the tectonic evolution of the region. |
| first_indexed | 2024-03-09T01:53:09Z |
| format | Article |
| id | doaj.art-ad6e926d658247b2aa770d4cf9867cd4 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T01:53:09Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ad6e926d658247b2aa770d4cf9867cd42023-12-08T15:14:24ZengMDPI AGEnergies1996-10732023-11-011623769710.3390/en16237697Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge SubductionSara Ciattoni0Stefano Mazzoli1Antonella Megna2Matteo Basilici3Stefano Santini4Dipartimento di Scienze Pure e Applicate (DiSPeA), Università di Urbino “Carlo Bo”, Via Aurelio Saffi, 2, 61029 Urbino, ItalyScuola di Scienze e Tecnologie, Sezione di Geologia, Università degli Studi di Camerino, Via Gentile III da Varano, 7, 62032 Camerino, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata, 605, 00143 Rome, ItalyDepartment of Geosciences, University of Fribourg, 1700 Fribourg, SwitzerlandDipartimento di Scienze Pure e Applicate (DiSPeA), Università di Urbino “Carlo Bo”, Via Aurelio Saffi, 2, 61029 Urbino, ItalyThe aseismic Nazca Ridge produces localized flat-slab subduction beneath the South American margin at latitudes 10° to 15° S. The geological evolution and the spatio-temporal pattern of deformation of the upper plate have been strongly influenced by the presence of the flat slab. In this study, we investigated the lithospheric thermal structure of this region by elaborating a 2D geothermal model along a section across the top of the Nazca Ridge, the Peru–Chile trench, the Andean Cordillera, and the Amazonian Basin, for a total length of 1000 km. For the sake of modelling, the crust of the overriding plate was subdivided into two parts, i.e., a sedimentary cover (including the entire lithostratigraphic sequence) and a crystalline basement. Applying an analytical methodology, we calculated geotherms and isotherms by setting (i) thickness, (ii) density, (iii) heat production, and (iv) thermal conductivity for each geological unit and considering (v) heat flux at the Moho, (vi) frictional heating produced by faults, and (vii) plate convergence rate. The resulting model could make a significant advance in our understanding of how flat slab geometry associated with the Nazca Ridge subduction affects the thermal structure and hence the tectonic evolution of the region.https://www.mdpi.com/1996-1073/16/23/7697subduction zonesslab geometrythermal structureheat flowisotherms |
| spellingShingle | Sara Ciattoni Stefano Mazzoli Antonella Megna Matteo Basilici Stefano Santini Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction Energies subduction zones slab geometry thermal structure heat flow isotherms |
| title | Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction |
| title_full | Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction |
| title_fullStr | Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction |
| title_full_unstemmed | Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction |
| title_short | Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction |
| title_sort | two dimensional geothermal model of the peruvian andes above the nazca ridge subduction |
| topic | subduction zones slab geometry thermal structure heat flow isotherms |
| url | https://www.mdpi.com/1996-1073/16/23/7697 |
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