Towards linking slab window geodynamics with the geophysical and geochemical signature of the upper mantle

dc.contributor.authorSanhueza, Jorge
dc.contributor.authorYanez, Gonzalo
dc.contributor.authorBuck, W. Roger
dc.contributor.authorSawant, Amol Dayanand
dc.contributor.authorVargas, Jaime Araya
dc.contributor.authorLloyd, Andrew J.
dc.date.accessioned2025-01-20T17:23:28Z
dc.date.available2025-01-20T17:23:28Z
dc.date.issued2023
dc.description.abstractSlab windows have clear consequences for surface observations that are the manifestations of asthenospheric upwelling and uppermost mantle temperature anomalies. In this contribution we link geophysical and geochemical observations from modern slab windows to the asthenospheric flow, temperature field and extent of melting using different geometries. We use an analytical solution for the slab window geometry and implement this solution in 3D steady-state thermomechanical models to calculate the temperature and velocity field. Our results show that upwelling (>1 cm/yr) and temperature anomalies (>1400 C-degrees) are controlled by the ratio between the half-spreading rate and velocity of the overriding plate. The extent of melting depends on both the ratio of these velocities and ridge obliquity while flow patterns are controlled only by ridge obliquity. Finally, we construct ternary diagrams to estimate the efficiency of matrix/melt upwelling and maximum mean mantle temperatures based on plate kinematics and ridge obliquity. This novel approach was used to investigate the slab windows in Antarctica, South America and western North America.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.epsl.2023.118435
dc.identifier.eissn1385-013X
dc.identifier.issn0012-821X
dc.identifier.urihttps://doi.org/10.1016/j.epsl.2023.118435
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91502
dc.identifier.wosidWOS:001101057700001
dc.language.isoen
dc.revistaEarth and planetary science letters
dc.rightsacceso restringido
dc.subjectSlab window
dc.subjectMid -ocean ridge subduction
dc.subjectNumerical modeling
dc.subjectSubduction zones
dc.subjectGeodynamics
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleTowards linking slab window geodynamics with the geophysical and geochemical signature of the upper mantle
dc.typeartículo
dc.volumen623
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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