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Indian Ocean Plate Reconstructions Since the Late Jurassic


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 © 1992 American Geophysical Union.

DOI: doi:10.1029/GM070p0471


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
UTAS 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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