Paleomagnetic Evidence for Pleistocene Clockwise Rotation in the Oiso Hills: A Possible Record of Interaction Between the Philippine Sea Plate and Northeast Japan

2013 ◽  
pp. 249-265 ◽  
Author(s):  
Masato Koyama ◽  
Hiroshi Kitazato
Keyword(s):  
Philippine Sea Plate ◽  
Clockwise Rotation ◽  
Philippine Sea

scholarly journals Rotation of the Philippine Sea plate inferred from paleomagnetism of oriented cores taken with an ROV-based coring apparatus

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Toshitsugu Yamazaki ◽  
Shun Chiyonobu ◽  
Osamu Ishizuka ◽  
Fumisato Tajima ◽  
Naoki Uto ◽  
...  
Keyword(s):  
Plate Motion ◽  
Philippine Sea Plate ◽  
Late Oligocene ◽  
Clockwise Rotation ◽  
Polar Wander ◽  
Philippine Sea ◽  
Apparent Polar Wander Path ◽  
Paleomagnetic Study ◽  
History Of ◽  
The Mean

AbstractReconstructing the history of Philippine Sea (PHS) plate motion is important for better understanding of the tectonics of the surrounding plates. It is generally considered that the PHS plate migrated northward since Eocene, but its rotation has not been constrained well; some reconstructions incorporated a large clockwise rotation but others did not. This is mainly because the difficulty of collecting oriented rocks from the mostly submerged PHS plate hindered establishing an apparent polar wander path. In this study, we conducted a paleomagnetic study of oriented cores taken using an ROV-based coring apparatus from the Hyuga Seamount on the northern part of the Kyushu-Palau Ridge, a remnant arc in the stable interior of the PHS plate. Stepwise thermal and alternating-field demagnetizations were applied to specimens taken successively from two ~ 30 cm long limestone cores of middle to late Oligocene age, and characteristic remanent magnetization directions could be isolated. Declination and inclination of D = 51.5° and I = 39.8°, respectively, were obtained as the mean of the two cores. The easterly-deflected declination means ~ 50° clockwise rotation of the PHS plate since middle to late Oligocene. In addition, ~ 5° latitudinal change of the site is estimated from the mean inclination. The result implies that the Kyushu-Palau Ridge was located to the southwest of the present position in middle to late Oligocene, and that PHS plate rotation as well as the Shikoku and Parece Vela Basin spreading contributed to the eastward migration of the Izu-Ogasawara (Bonin) Arc to the current position.

scholarly journals Configuration and structure of the Philippine Sea Plate off Boso, Japan: constraints on the shallow subduction kinematics, seismicity, and slow slip events

2019 ◽  
Vol 71 (1) ◽  
Author(s):  
Aki Ito ◽  
Takashi Tonegawa ◽  
Naoki Uchida ◽  
Yojiro Yamamoto ◽  
Daisuke Suetsugu ◽  
...  
Keyword(s):  
Receiver Function ◽  
Function Analysis ◽  
Philippine Sea Plate ◽  
Slow Slip ◽  
Low Velocity ◽  
Slow Slip Events ◽  
Philippine Sea ◽  
Receiver Function Analysis ◽  
Eastern Edge ◽  
Upper Boundary

Abstract We applied tomographic inversion and receiver function analysis to seismic data from ocean-bottom seismometers and land-based stations to understand the structure and its relationship with slow slip events off Boso, Japan. First, we delineated the upper boundary of the Philippine Sea Plate based on both the velocity structure and the locations of the low-angle thrust-faulting earthquakes. The upper boundary of the Philippine Sea Plate is distorted upward by a few kilometers between 140.5 and 141.0°E. We also determined the eastern edge of the Philippine Sea Plate based on the delineated upper boundary and the results of the receiver function analysis. The eastern edge has a northwest–southeast trend between the triple junction and 141.6°E, which changes to a north–south trend north of 34.7°N. The change in the subduction direction at 1–3 Ma might have resulted in the inflection of the eastern edge of the subducted Philippine Sea Plate. Second, we compared the subduction zone structure and hypocenter locations and the area of the Boso slow slip events. Most of the low-angle thrust-faulting earthquakes identified in this study occurred outside the areas of recurrent Boso slow slip events, which indicates that the slow slip area and regular low-angle thrust earthquakes are spatially separated in the offshore area. In addition, the slow slip areas are located only at the contact zone between the crustal parts of the North American Plate and the subducting Philippine Sea Plate. The localization of the slow slip events in the crust–crust contact zone off Boso is examined for the first time in this study. Finally, we detected a relatively low-velocity region in the mantle of the Philippine Sea Plate. The low-velocity mantle can be interpreted as serpentinized peridotite, which is also found in the Philippine Sea Plate prior to subduction. The serpentinized peridotite zone remains after the subduction of the Philippine Sea Plate and is likely distributed over a wide area along the subducted slab.

Contrasting subduction structures within the Philippine Sea plate: Hydrous oceanic crust and anhydrous volcanic arc crust

2014 ◽  
Vol 15 (5) ◽  
pp. 1977-1990 ◽  
Author(s):  
Ryuta Arai ◽  
Takaya Iwasaki ◽  
Hiroshi Sato ◽  
Susumu Abe ◽  
Naoshi Hirata
Keyword(s):  
Oceanic Crust ◽  
Philippine Sea Plate ◽  
Volcanic Arc ◽  
Philippine Sea

scholarly journals Indentation of the Philippine Sea plate by the Eurasia plate in Taiwan: Details from recent marine seismological experiments

2013 ◽  
Vol 594 ◽  
pp. 60-79 ◽  
Author(s):  
Serge Lallemand ◽  
Thomas Theunissen ◽  
Philippe Schnürle ◽  
Chao-Shing Lee ◽  
Char-Shine Liu ◽  
...  
Keyword(s):  
Philippine Sea Plate ◽  
Philippine Sea

Variations in sediment thickness and type along the northern Philippine Sea Plate at the Nankai Trough

Island Arc ◽  
2008 ◽  
Vol 17 (3) ◽  
pp. 342-357 ◽  
Author(s):  
Toshihiro Ike ◽  
Gregory F. Moore ◽  
Shin'ichi Kuramoto ◽  
Jin-Oh Park ◽  
Yoshiyuki Kaneda ◽  
...  
Keyword(s):  
Nankai Trough ◽  
Philippine Sea Plate ◽  
Sediment Thickness ◽  
Philippine Sea

scholarly journals Plate convergence measured by GPS across the Sundaland/Philippine Sea Plate deformed boundary: the Philippines and eastern Indonesia

1999 ◽  
Vol 139 (2) ◽  
pp. 296-316 ◽  
Author(s):  
C. Rangin ◽  
X. Le Pichon ◽  
S. Mazzotti ◽  
M. Pubellier ◽  
N. Chamot-Rooke ◽  
...  
Keyword(s):  
The Philippines ◽  
Philippine Sea Plate ◽  
Plate Convergence ◽  
Philippine Sea ◽  
Eastern Indonesia

A bump on the upper surface of the Philippine Sea plate beneath the Boso Peninsula, Japan inferred from seismic reflection surveys: A possible asperity of the 1703 Genroku earthquake

2009 ◽  
Vol 472 (1-4) ◽  
pp. 39-50 ◽  
Author(s):  
Noriko Tsumura ◽  
Nozomi Komada ◽  
Junpei Sano ◽  
Shinsuke Kikuchi ◽  
Shuji Yamamoto ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Philippine Sea Plate ◽  
Philippine Sea ◽  
Boso Peninsula
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