Waveform inversion of the S reflector west of Spain: Fine structure of a detachment fault.

Leythaeuser, T., Reston, Timothy J. and Minshull, T. A. (2005) Waveform inversion of the S reflector west of Spain: Fine structure of a detachment fault. Open Access Geophysical Research Letters, 32 (22). L22304. DOI 10.1029/2005GL024026.

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Abstract

The S reflection west of Iberia has been interpreted as a low‐angle detachment fault separating crustal fault blocks from partially serpentinized mantle. We apply full waveform inversion to investigate the fine structure of S. Our results confirm that S is largely a step increase in velocity (and density), probably from crustal rocks to partially serpentinized mantle peridotites. A ∼50 m thick low velocity zone above S might represent a main fault zone of highly serpentinized peridotites or hydrofractured and altered crustal rocks above the main fault zone. Both interpretations imply focused fluid flow along S, raising the possibility that low‐angle movement along S was aided by the development of local, transient high fluid pressures.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2005GL024026
ISSN: 0094-8276
Date Deposited: 05 Dec 2008 12:01
Last Modified: 28 Mar 2018 09:55
URI: http://oceanrep.geomar.de/id/eprint/5438

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