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Indian Ocean Plate Reconstructions Since the Late Jurassic

Citation

Royer, JY and Sclater, JG and Sandwell, DT and Cande, SC and Schlich, R and Munschy, M and Dyment, J and Fisher, RL and Mueller, RD and Coffin, MF and Patriat, P and Bergh, HW, Indian Ocean Plate Reconstructions Since the Late Jurassic, Synthesis of Results From Scientific Drilling in the Indian Ocean, American Geophysical Union, Duncan, RA.; Ria, DK.; Kidd, RB.; von Rad, U; Weissel, JK (ed), Washington DC, pp. 471-475. ISBN 0875908225 (1992) [Research Book Chapter]


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Copyright Statement

Copyright © 1992 American Geophysical Union.

DOI: doi:10.1029/GM070p0471

Abstract

The evolution of the Indian Ocean (Figure 1) since the Late Jurassic can be summarized in three main periods of seafloor spreading separated by two major plate boundary reorganizations [Royer, 1992]. From breakup of Gondwana at about 160 Ma (Figure 2) to the Late Cretaceous (-90/95 Ma), the opening of the Indian Ocean coincided with divergence of two superblocks, Africa-South America and Madagascar-Seychelles-India-Australia-Antarctica, which further fragmented in the Early Cretaceous (ˇ­chron M0; Figure 3) into Africa-Madagascar-India and Australia-Antarctica. This two-plate system broke into a five-plate system during the Late Cretaceous with seafloor spreading between Madagascar and India-Seychelles and between Australia and Antarctica (Figures 4 to 8). The second major plate boundary reorganization occurred during the middle Eocene and coincided with the collision of India with Eurasia (Figures 8 and 9). The resulting plate boundary system has prevailed until present (Figures 8 to 12, and 1). The final events of this last phase were opening of the Gulf of Aden at about Chron 5 (10 Ma) and onset of the intraplate deformation in the Central Indian Basin between India and Australia (ˇ­7 Ma). Evolution of the plate geometry is summarized in Figure 13.

Item Details

Item Type:Research Book Chapter
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine Geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Coffin, MF (Professor Mike Coffin)
ID Code:73788
Year Published:1992
Deposited By:Research Division
Deposited On:2011-10-26
Last Modified:2011-11-01
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