The 580-520 Ma Gondwana suture of Madagascar and its continuation into Antarctica and Africa
U-Pb age data from southwest Madagascar provide a compelling case that the pre-Gondwana Indian plate was stitched with the arc terranes of the Arabian Nubian Shield along a suture that closed between 580. Ma and 520. Ma. The key observations supportive of this interpretation are: (1) metamorphism dated to 630-600. Ma is manifested only on the west side of the suture in rocks that have affinities with the oceanic and island arc terranes of the Arabian Nubian Shield, or which represent...[Show more]
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