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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24831

Title: Propagators and ridge jumps in a back-arc basin, the West Philippine Basin
Authors: Anne Deschamps;Ryuichi Shinjo;Takeshi Matsumoto;Chao-Shing Lee;Serge E. Lallemand;Shiguo Wu;Scientific party of KR03-04 and KR04-14 cruises
Contributors: NTOU:Institute of Applied Geosciences
國立臺灣海洋大學:應用地球科學研究所
Date: 2008-08
Issue Date: 2011-10-20T08:17:48Z
Publisher: Terra Nova
Abstract: abstract:We explore the tectono-magmatic processes in the western West Philippine Basin, Philippine Sea Plate, using bathymetric data acquired in 2003 and 2004. The northwestern part of the basin formed through a series of northwestward propagating rifts. We identify at least five sequences of propagating rifts, probably triggered by mantle flow away from the mantle thermal anomaly that is responsible for the origin of the Benham and Urdenata plateaus. Gravitational forces caused by along-axis topographic gradient and a ∼30° ridge reorientation appear to also be driving the rift propagations. The along-axis mantle flow appears to be reduced and deflected along the Luzon-Okinawa fracture zone, because the spreading system remained stable west of this major fault zone. North-east of the Benham plateau, a left-lateral fracture zone has turned into a NE–SW-trending spreading axis. As a result, a microplate developed at the triple junction.
Relation: 20(4), pp.327–332
URI: http://ntour.ntou.edu.tw/handle/987654321/24831
Appears in Collections:[應用地球科學研究所] 期刊論文

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