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ABSTRACT: Submarine Limestones as Natural Tiltmeter of Subducting Plate

Kantaro Fujioka, Atsuko Yasue

Banks on the subducting plate offer a good control of the in situ rate of subduction of the downgoing slab. We know the age of the truncation of the banks by wave cutting by using 14C method of the calcareous materials that cover the surface of the banks. At the northern portion of the Philippine Sea plate are many shallow banks, some of which are suitable for measuring the in situ subduction rate. Kurose bank consists of Paleogene volcanogenic materials on which surface was truncated by wave action and was covered with calcareous algae. We propose here a tilting bank model to evaluate the in situ subduction rate of the Phillipine Sea Plate.

AAPG Search and Discovery Article #90097©1990 Fifth Circum-Pacific Energy and Mineral Resources Conference, Honolulu, Hawaii, July 29-August 3, 1990