scholarly journals Spatial variations of the 660-km discontinuity in the western Pacific subduction zones observed from CEArray triplication data

2011 ◽  
Vol 24 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Baoshan Wang ◽  
Fenglin Niu
Keyword(s):  
Subduction Zones ◽  
Spatial Variations ◽  
Western Pacific ◽  
The Western Pacific

scholarly journals THE WAVE GEODYNAMIC IMPACT OF TECTONIC PROCESSES ON THE AMURIAN PLATE

2021 ◽  
Vol 40 (4) ◽  
pp. 72-86
Author(s):  
V.G. Bykov ◽  
◽  
T.V. Merkulova ◽  
Keyword(s):  
Subduction Zones ◽  
Western Pacific ◽  
Relative Contribution ◽  
Tectonic Processes ◽  
Time Period ◽  
Amurian Plate ◽  
Recent Geodynamics ◽  
Different Depths ◽  
The Western Pacific ◽  
Migration Of Earthquakes

The analysis of data on the migration of earthquakes and slow deformations from the Indo-Eurasian collision and the Western Pacific subduction zones is given, and the wave “geodynamic impact” of these tectonic processes on the Amurian plate and surrounding structures is shown. The interaction and a relative contribution of collision and subduction to the recent geodynamics of the Amurian plate are discussed. A scheme is constructed showing localizations of the slow strain wave manifestation in the areas of central and eastern Asia. The calculations are performed aimed at revealing a transverse migration of earthquakes (M ≥ 6.5) directed from the Japan and the Kuril-Kamchatka trenches toward the Asian continent during the time period from 1960 to 2015. The migration of earthquakes along the profile crossing Hokkaido Island occurs at velocities of 15 and 23 km/yr, whereas the migration velocity from the Kuril-Kamchatka Trench via Sakhalin Island is evaluated from 20 to 40 km/yr at different depths. We focus on an insufficient study of the influence of the Western Pacific subduction on the formation of the deformation field in continental Asia.

scholarly journals Dynamic phase boundaries of olivine-wadsleyite in subduction zones in the western Pacific

2002 ◽  
Vol 29 (22) ◽  
pp. 2-1-2-4 ◽  
Author(s):  
Zhi-Cheng Jing ◽  
Jie-Yuan Ning ◽  
Shu-Guang Wang ◽  
Shao-Xian Zang
Keyword(s):  
Subduction Zones ◽  
Western Pacific ◽  
Phase Boundaries ◽  
Dynamic Phase ◽  
The Western Pacific

Western Pacific marginal basin plate tectonics: overview, questions, and insights from mantle structure

2020 ◽  
Author(s):  
Jonny Wu ◽  
John Suppe
Keyword(s):  
South China Sea ◽  
South China ◽  
Subduction Zones ◽  
Plate Tectonics ◽  
Western Pacific ◽  
Mantle Structure ◽  
Equatorial Latitude ◽  
China Sea ◽  
Marginal Seas ◽  
The Western Pacific

<p>The western Pacific marginal basins are a collage of plates and marginal seas that primarily formed in the Cenozoic and occupy the complex tectonic area between the converging major Eurasian, Indo-Australian and Pacific plates.  Strongly contrasting plate tectonic reconstructions continue to be proposed for this region.  Here we review current plate models, key questions, and highlight recent insights from mantle structure studies. </p><p>The Philippine Sea plate (PSP) is one of the largest marginal seas in the region.  The plate is currently moving WNW, in a similar orientation to the Pacific and Caroline plates.  Multiple studies show that PSP plate tectonics are key to unravelling the history of the region, for several reasons: (1) the PSP is far-travelled; paleomagnetism indicates relatively rapid (5.5 cm/yr) PSP northward motions since the Eocene from a near-equatorial latitude; (2) PSP tectonic histories imply interactions with many surrounding plates and regions, including the South China Sea (SCS), Taiwan, Japan, the western Pacific, and other smaller plates or fragments (i.e. Luzon or Celebes Sea); (3) the pre-subduction size of the PSP is not well-established because most of the plate is surrounded by subduction zones.  We review recent studies that attempt to ‘unsubduct’ the PSP from tomography and discuss their regional implications.</p><p>Another key but highly controversial topic is South China Sea (PSCS) formation and associated proto-South China Sea (PSCS) disappearance, if such a plate had existed.  The most popular proto-South China Sea plate model invokes southward subduction of the proto-South China Sea beneath NW Borneo during the Cenozoic.  Although southward PSCS subduction is most consistent with our current geological understanding, the regional mantle structure does not easily fit with this model; other scenarios may be possible.  In particular, it has not been straightforward for the southward PSCS model to explain the origin of sub-horizontal slabs under the present SCS at relatively shallow (500 to 800 km) depths.  We show an alternative ‘double-sided’ PSCS subduction model that produces testable hypotheses for future NW Borneo studies. </p><p>Finally, the Caroline Sea plate has an enigmatic history but is important for understanding the southern Marianas, Yap and Palau trenches.  We first review previous evidence for a ‘Caroline hotspot track’ and overlapping LIPs that traverse the northern Caroline plate.  We link these features to an imaged lower mantle plume and show their implications for Caroline-Pacific plate motions since the latest Eocene. </p>

Typhoon Havens Handbook for the Western Pacific and Indian Oceans. Change 3

1993 ◽  
Author(s):  
Dennis C. Perryman ◽  
Richard E. Gilmore ◽  
Ronald E. Englebretson
Keyword(s):  
Western Pacific ◽  
The Western Pacific
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