3D thermal model of the southern Central Andes

Registro completo

Título

3D thermal model of the southern Central Andes

Autor(es)

Rodriguez Piceda, Constanza; Sheck Wenderoth, Magdalena; Bott, Judith; Gómez Dacal, María Laura; Pons, Michael; Prezzi, Claudia Beatriz; Strecker, Manfred Reinhard Karl

Afiliación(es) del/de los autor(es)

Rodriguez Piceda, Constanza. German Research Centre for Geosciences; Alemania
Sheck Wenderoth, Magdalena. German Research Centre for Geosciences; Alemania
Bott, Judith. German Research Centre for Geosciences; Alemania
Gómez Dacal, María Laura. German Research Centre for Geosciences; Alemania
Pons, Michael. German Research Centre for Geosciences; Alemania
Prezzi, Claudia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Strecker, Manfred Reinhard Karl. Universitat Potsdam; Alemania

Resumen

The Central Andean orogen formed as a result of the subduction of the oceanic Nazca plate beneath the continental South-American plate. In the southern segment of the Central Andes (SCA, 29°S-39°S), the oceanic plate subducts beneath the continental plate with distinct dip angles from north to south. Subduction geometry, tectonic deformation, and seismicity at this plate boundary are closely related to lithospheric temperature distribution in the upper plate. Previous studies provided insights into the present-day thermal field with focus on the surface heat flow distribution in the orogen or through modelling of the seismic velocity distribution in restricted regions of the SCA as indirect proxy of the deep thermal field. Despite these recent advances, the information on the temperature distribution at depth of the SCA lithosphere remains scarcely constrained. To gain insight into the present-day thermal state of the lithosphere in the region, we derived the 3D lithospheric temperature distribution from inversion of S-wave velocity to temperature and calculations of the steady state thermal field. The configuration of the region – concerning both, the heterogeneity of the lithosphere and the slab dip – was accounted for by incorporating a 3D data-constrained structural and density model of the SCA into the workflow (Rodriguez Piceda et al. 2020a-b). The model consists on a continental plate with sediments, a two-layer crust and the lithospheric mantle being subducted by an oceanic plate. The model extension covers an area of 700 km x 1100 km, including the orogen (i.e. magmatic arc, main orogenic wedge), the forearc and the foreland, and it extents down to 200 km depth.

Año de publicación

2023

Idioma

inglés

Formato (Tipo MIME)

application/zip

Clasificación temática de acuerdo a la FORD

Ciencias de la tierra y ciencias ambientales relacionadas

Condiciones de uso

Disponible en acceso abierto bajo licencia Creative Commons https://creativecommons.org/licenses/by-nc-sa/2.5/ar/

Repositorio digital

CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas

Identificador de proyecto

Fundación Alemana de Investigación Científica/ITRG 373/34-1

Identificador de proyecto

Consejo Nacional de Investigaciones Científicas y Técnicas/ITRG 373/34-1