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| Gomez, O; Briais, Anne; Sauter, D; Mendel, V. |
| We present the analysis of the deformation in the axial valley of two contrasted regions of the very slow spreading Southwest Indian Ridge based on side-scan sonar images. Our objective is to investigate how the obliquity is accommodated along the system. We show that the robust magmatic segments have axial valleys and major faults subperpendicular to spreading. The other sections show fault populations with various degrees of obliquity, often arranged in left-stepping echelons, accommodating part of the strike-slip deformation. Side-scan sonar reveals the presence of a corrugated surface near 59 degrees E interpreted to be an incipient detachment fault. We show that the large width of the SWIR oblique sections, and the difference in tectonic style between... |
| Tipo: Text |
Palavras-chave: Mid-ocean ridges; Side-scan sonar; Tectonics; Discontinuities. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00234/34567/33236.pdf |
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