Articles | Volume 15, issue 6
https://doi.org/10.5194/se-15-671-2024
https://doi.org/10.5194/se-15-671-2024
Research article
 | 
18 Jun 2024
Research article |  | 18 Jun 2024

Cretaceous–Paleocene extension at the southwestern continental margin of India and opening of the Laccadive basin: constraints from geophysical data

Mathews George Gilbert, Parakkal Unnikrishnan, and Munukutla Radhakrishna

Related subject area

Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Structural geology and tectonics, paleoseismology, rock physics, experimental deformation | Discipline: Tectonics
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Cited articles

Bhattacharya, G. C. and Yatheesh, V.: Plate-tectonic evolution of the deep ocean basins adjoining the western continental margin of India – a proposed model for the early opening scenario, Petroleum geosciences: Indian contexts, Springer, 61 pp., https://doi.org/10.1007/978-3-319-03119-4_1, 2015. a, b, c, d, e, f, g
Bijesh, C., Kurian, P. J., Yatheesh, V., Tyagi, A., and Twinkle, D.: Morphotectonic characteristics, distribution and probable genesis of bathymetric highs off southwest coast of India, Geomorphology, 315, 33–44, 2018. a, b, c
Bonini, M., Souriot, T., Boccaletti, M., and Brun, J. P.: Successive orthogonal and oblique extension episodes in a rift zone: Laboratory experiments with application to the Ethiopian Rift, Tectonics, 16, 347–362, 1997. a, b
Chaubey, A., Dyment, J., Bhattacharya, G. C., Royer, J.-Y., Srinivas, K., and Yatheesh, V.: Paleogene magnetic isochrons and palaeo-propagators in the Arabian and Eastern Somali basins, NW Indian Ocean, Geological Society, London, Special Publications, 195, 71–85, 2002. a
Collier, J., Sansom, V., Ishizuka, O., Taylor, R., Minshull, T., and Whitmarsh, R.: Age of Seychelles–India break-up, Earth Planet. Sc. Lett., 272, 264–277, 2008. a
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Short summary
The study identifies evidence for extension south of Tellicherry Arch along the southwestern continental margin of India through the integrated analysis of multichannel seismic and gravity data. The sediment deposition pattern indicates that this extension occurred after the Eocene. We further propose that the anticlockwise rotation of India and the passage of the Réunion plume have facilitated the opening of the Laccadive basin.