Paleomagnetism of DSDP Leg 55 Basalts and Implications for the Tectonics of the Pacific Plate

Abstract

We have tried to obtain reliable paleolatitudes of the Ojin, Nintoku and Suiko Seamounts and to reconstruct the movement of the Pacific plate in the period 0-70my with data from various sources. We have enough material to assess the extent of paleosecular variation (PSV) in the N Pacific about 65my ago. The magnitude of PSV obtained from the present seamounts is much larger than the values reported for the recent and U Tertiary volcanics on Hawaiian islands.-from Authors