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题名: Propagators and ridge jumps in a back-arc basin, the West Philippine Basin
作者: Anne Deschamps;Ryuichi Shinjo;Takeshi Matsumoto;Chao-Shing Lee;Serge E. Lallemand;Shiguo Wu;Scientific party of KR03-04 and KR04-14 cruises
贡献者: NTOU:Institute of Applied Geosciences
國立臺灣海洋大學:應用地球科學研究所
日期: 2008-08
上传时间: 2011-10-20T08:17:48Z
出版者: Terra Nova
摘要: 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.
關聯: 20(4), pp.327–332
URI: http://ntour.ntou.edu.tw/handle/987654321/24831
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