Structural Paragenesis of a Shear Zone within the Intraplate Deformation of the Central Indian Ocean Basin

The mosaic-block structure of the intraplate deformation zone in the Central Indian Ocean Basin is confirmed by multibeam bathymetry data collected on cruise 42 of R/V Akademik Boris Petrov and cruise SO258/2 of the R/V Sonne. It consists of a set of isometric deformed tectonic blocks. The linear block at 0.2°–0.6° S, which looks in plan view like stairs or a branch, is sharply distinguished by its morphology. This block is a system of multiscale structural elements (folds, faults) that constitute a structural paragenesis formed in the mechanical environment of dextral transpression and can be interpreted using the Riedel model.