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

The mosaic-block structure of the intraplate deformation area in the Central Basin of the Indian Ocean is confirmed by multibeam bathymetry data collected in cruise 42 of RV Akademik Boris Petrov and cruise SO258 of RV Sonne. It consists of a set of isometric deformed tectonic blocks. The linear block at 0.2–0.6°S, which looks in plan like a stairs or branch, is sharply distinguished by its morphology. This block is a system of multi-scale structural elements (folds, flexures, breaks) that constitute a structural paragenesis formed in the mechanical environment of a right-sided simple shift, and can be interpreted within the framework of the Riedel model.