Articles | Volume 10, issue 4
Solid Earth, 10, 1099–1121, 2019
https://doi.org/10.5194/se-10-1099-2019
Solid Earth, 10, 1099–1121, 2019
https://doi.org/10.5194/se-10-1099-2019

Research article 10 Jul 2019

Research article | 10 Jul 2019

Lithosphere tearing along STEP faults and synkinematic formation of lherzolite and wehrlite in the shallow subcontinental mantle

Károly Hidas et al.

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AR by Károly Hidas on behalf of the Authors (31 May 2019)  Author's response    Manuscript
ED: Publish as is (11 Jun 2019) by Florian Fusseis
ED: Publish as is (12 Jun 2019) by Federico Rossetti(Executive Editor)
AR by Károly Hidas on behalf of the Authors (13 Jun 2019)  Author's response    Manuscript
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Short summary
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.