3D rheological model of the Southern Central Andes

Rodriguez Piceda, Constanza; Scheck-Wenderoth, Magdalena; Cacace, Mauro; Bott, Judith; Strecker, Manfred;

2021 || GFZ Data Services

The southern Central Andes (SCA, 29°S-39°S) are characterized by the subduction of the oceanic Nazca Plate beneath the continental South American Plate. One striking feature of this area is the change of the subduction angle of the Nazca Plate between 33°S and 35°S from the Chilean-Pampean flat-slab zone (< 5° dip) in the north to a steeper sector in the south (~30° dip). Subduction geometry, tectonic deformation, and seismicity at this plate boundary are closely related to the lithospheric strength in the upper plate. Despite recent research focused on the compositional and thermal characteristics of the SCA lithosphere, the lithospheric strength distribution remains largely unknown. Here we calculated the long-term lithospheric strength on the basis of an existing 3D model describing the variation of thickness, density and temperature of geological units forming the lithosphere of the SCA.

The model consists of 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.

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Source http://dx.doi.org/10.5880/gfz.4.5.2021.002
Source publisher GFZ Data Services
DOI 10.5880/gfz.4.5.2021.002
Authors
  • Rodriguez Piceda, Constanza
  • 0000-0002-0785-7600
  • GFZ German Research Centre for Geosciences, Potsdam, Germany; University of Potsdam, Potsdam, Germany;
  • Scheck-Wenderoth, Magdalena
  • 0000-0003-0426-8269
  • GFZ German Research Centre for Geosciences, Potsdam, Germany; RWTH Aachen, Aachen, Germany;
  • Cacace, Mauro
  • 0000-0001-6101-9918
  • CONICET; University of Buenos Aires, Buenos Aires, Argentina;
  • Bott, Judith
  • 0000-0002-2018-4754
  • GFZ German Research Centre for Geosciences, Potsdam, Germany;
Contributors
  • Rodriguez Piceda, Constanza
  • ContactPerson
  • GFZ German Research Centre for Geosciences, Potsdam, Germany;
References
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  • Rodriguez Piceda, C., Scheck Wenderoth, M., Gomez Dacal, M. L., Bott, J., Prezzi, C. B., & Strecker, M. R. (2020). Lithospheric density structure of the southern Central Andes constrained by 3D data-integrative gravity modelling. International Journal of Earth Sciences, 110(7), 2333–2359. https://doi.org/10.1007/s00531-020-01962-1
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Contact
  • Rodriguez Piceda, Constanza
  • GFZ German Research Centre for Geosciences, Potsdam, Germany;
Citation Rodriguez Piceda, C., Scheck-Wenderoth, M., Cacace, M., Bott, J., & Strecker, M. (2021). 3D rheological model of the Southern Central Andes (Version 1.0) [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.4.5.2021.002
Spatial coordinates
  • eLong -64.3973
  • nLat -28.8655
  • sLat -38.8488
  • wLong -72.4543