Lithospheric Thinning Beneath Rifted Regions of Southern California

Autor:	Karen M. Fischer, S. W. French, Vedran Lekic
Rok vydání:	2011
Předmět:	Simple shear Plate tectonics Multidisciplinary Rift Lithosphere Lithospheric flexure Crust Shear zone Geology Mantle (geology) Seismology
Zdroj:	Science. 334:783-787
ISSN:	1095-9203 0036-8075
DOI:	10.1126/science.1208898
Popis:	The stretching and break-up of tectonic plates by rifting control the evolution of continents and oceans, but the processes by which lithosphere deforms and accommodates strain during rifting remain enigmatic. Using scattering of teleseismic shear waves beneath rifted zones and adjacent areas in Southern California, we resolve the lithosphere-asthenosphere boundary and lithospheric thickness variations to directly constrain this deformation. Substantial and laterally abrupt lithospheric thinning beneath rifted regions suggests efficient strain localization. In the Salton Trough, either the mantle lithosphere has experienced more thinning than the crust, or large volumes of new lithosphere have been created. Lack of a systematic offset between surface and deep lithospheric deformation rules out simple shear along throughgoing unidirectional shallow-dipping shear zones, but is consistent with symmetric extension of the lithosphere.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::408d6b2e8e544fe647a539f6c2dc1e4a https://doi.org/10.1126/science.1208898 Zobrazit plný text záznamu Plný text ve formátu PDF