Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions
As a proxy for long-term lithospheric strength, the effective elastic thickness (Te) can be used to understand the relationship between lithospheric rheology and geodynamic evolution of complex tectonic settings. Here we present, for the first time, high-resolution maps of spatial variations of Te i...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Science BV
2014
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/34235 |
| _version_ | 1848754167453057024 |
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| author | Jiménez-Díaz, Alberto Ruiz, Javier Pérez-Gussinyé, Marta Kirby, Jon Álvarez-Gómez, Jose Tejero, Rosa Capote, Ramon |
| author_facet | Jiménez-Díaz, Alberto Ruiz, Javier Pérez-Gussinyé, Marta Kirby, Jon Álvarez-Gómez, Jose Tejero, Rosa Capote, Ramon |
| author_sort | Jiménez-Díaz, Alberto |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | As a proxy for long-term lithospheric strength, the effective elastic thickness (Te) can be used to understand the relationship between lithospheric rheology and geodynamic evolution of complex tectonic settings. Here we present, for the first time, high-resolution maps of spatial variations of Te in Central America and surrounding regions from the analysis of the coherence between topography and Bouguer gravity anomaly using multitaper and wavelet methods. Regardless of the technical differences between the two methods, there is a good overall agreement in the spatial variations of Te recovered from both methods. Although absolute Te values can vary in both maps, the qualitative Te structure and location of the main Te gradients are very similar. The pattern of the Te variations in Central America and surrounding regions agrees well with the tectonic provinces in the region, and it is closely related to major tectonic boundaries, where the Middle American and Lesser Antilles subduction zones are characterized by a band of high Te on the downgoing slab seaward of the trenches. These high Te values are related to internal loads (and in the case of the southernmost tip of the Lesser Antilles subduction zone also associated with a large amount of sediments) and should be interpreted with caution. Finally, there is a relatively good correlation, despite some uncertainties, between surface heat flow and our Te results for the study area. These results suggest that although this area is geologically complex, the thermal state of the lithosphere has profound influence on its strength, such that Te is strongly governed by thermal structure. |
| first_indexed | 2025-11-14T08:36:06Z |
| format | Journal Article |
| id | curtin-20.500.11937-34235 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:36:06Z |
| publishDate | 2014 |
| publisher | Elsevier Science BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-342352019-02-19T04:27:57Z Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions Jiménez-Díaz, Alberto Ruiz, Javier Pérez-Gussinyé, Marta Kirby, Jon Álvarez-Gómez, Jose Tejero, Rosa Capote, Ramon Caribbean Plate Effective elastic thickness Lithosphere structure Central America Spectral methods As a proxy for long-term lithospheric strength, the effective elastic thickness (Te) can be used to understand the relationship between lithospheric rheology and geodynamic evolution of complex tectonic settings. Here we present, for the first time, high-resolution maps of spatial variations of Te in Central America and surrounding regions from the analysis of the coherence between topography and Bouguer gravity anomaly using multitaper and wavelet methods. Regardless of the technical differences between the two methods, there is a good overall agreement in the spatial variations of Te recovered from both methods. Although absolute Te values can vary in both maps, the qualitative Te structure and location of the main Te gradients are very similar. The pattern of the Te variations in Central America and surrounding regions agrees well with the tectonic provinces in the region, and it is closely related to major tectonic boundaries, where the Middle American and Lesser Antilles subduction zones are characterized by a band of high Te on the downgoing slab seaward of the trenches. These high Te values are related to internal loads (and in the case of the southernmost tip of the Lesser Antilles subduction zone also associated with a large amount of sediments) and should be interpreted with caution. Finally, there is a relatively good correlation, despite some uncertainties, between surface heat flow and our Te results for the study area. These results suggest that although this area is geologically complex, the thermal state of the lithosphere has profound influence on its strength, such that Te is strongly governed by thermal structure. 2014 Journal Article http://hdl.handle.net/20.500.11937/34235 10.1016/j.epsl.2014.01.042 Elsevier Science BV fulltext |
| spellingShingle | Caribbean Plate Effective elastic thickness Lithosphere structure Central America Spectral methods Jiménez-Díaz, Alberto Ruiz, Javier Pérez-Gussinyé, Marta Kirby, Jon Álvarez-Gómez, Jose Tejero, Rosa Capote, Ramon Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions |
| title | Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions |
| title_full | Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions |
| title_fullStr | Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions |
| title_full_unstemmed | Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions |
| title_short | Spatial variations of effective elastic thickness of the lithosphere in Central America and surrounding regions |
| title_sort | spatial variations of effective elastic thickness of the lithosphere in central america and surrounding regions |
| topic | Caribbean Plate Effective elastic thickness Lithosphere structure Central America Spectral methods |
| url | http://hdl.handle.net/20.500.11937/34235 |