Instituto Andaluz de Ciencias de la Tierra, CSIC & Universidad de
Granada, Av. de las Palmeras 4, 18100 Armilla, Granada, Spain
Guillermo Booth-Rea
Departamento de Geodinámica, Facultad de Ciencias, Universidad de
Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain
Claudio Marchesi
Instituto Andaluz de Ciencias de la Tierra, CSIC & Universidad de
Granada, Av. de las Palmeras 4, 18100 Armilla, Granada, Spain
Departamento de Mineralogía y Petrología, Facultad de Ciencias,
Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain
Jean-Louis Bodinier
Géosciences Montpellier, UMR 5243, CNRS & Université de
Montpellier, Place E. Bataillon, 34095 Montpellier, France
Jean-Marie Dautria
Géosciences Montpellier, UMR 5243, CNRS & Université de
Montpellier, Place E. Bataillon, 34095 Montpellier, France
Amina Louni-Hacini
Faculté des Sciences de la Terre, de Géographie et de
l'Aménagement du Territoire – Université des Sciences et de la
Technologie Houari Boumédiène – Laboratoire de Métallogénie
et Magmatisme de l'Algérie, 32, El Alia, 16111, Bab Ezzouar, Algiers,
Algeria
Abla Azzouni-Sekkal
Faculté des Sciences de la Terre, de Géographie et de
l'Aménagement du Territoire – Université des Sciences et de la
Technologie Houari Boumédiène – Laboratoire de Métallogénie
et Magmatisme de l'Algérie, 32, El Alia, 16111, Bab Ezzouar, Algiers,
Algeria
Faculté des Sciences de la Nature et de la Vie et des Sciences de la
Terre et de l'Univers, Université Abou Bekr Belkaïd, BP 119,
13000, Tlemcen, Algeria
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Subduction-transform edge propagator (STEP) faults are the locus of continual lithospheric tearing at the edges of subducted slabs, resulting in sharp changes in the lithospheric thickness and triggering lateral and/or near-vertical mantle flow. Here, we study upper mantle rocks recovered from a STEP fault context by < 4 Ma alkali volcanism. We reconstruct how the microstructure developed during deformation and coupled melt–rock interaction, which are promoted by lithospheric tearing at depth.
Subduction-transform edge propagator (STEP) faults are the locus of continual lithospheric...
