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The Manila Trench was formed by the subduction of the Eurasian Plate underneath the Philippine Sea Plate, which initiated during the Middle Miocene (22-25 million years ago). A characteristic feature of this plate boundary is the gradual change from normal subduction (on the southern margin) to a collisional regime (on the northern margin ...
Subduction of Late Oligocene to Early Miocene South China sea oceanic crust occurs at the Manila Trench. Subduction of Eocene Philippine Sea oceanic crust occurs at the East Luzon Trough – Philippine Trench system. The strike-slip, left lateral fault, Philippine fault system is associated with the northward movement of the belt. [14]
The Manila Trench results from eastward subduction of the Eurasian plate (Sundaland Block) beneath the western side of the Philippine Mobile Belt. Subduction along the north-trending trench started in late Oligocene to early Miocene. [4] [23] [24] It has an average subduction rate at 1–2 cm (0.39–0.79 in) per year, slowing towards the north ...
The Eurasian plate is subducting under the Philippine Mobile Belt at the Manila Trench. The Sunda plate is subducting under the Philippine Mobile Belt at the Negros Trench and the Cotobato Trench. The oceanic Australian plate is subducted beneath the continental Sunda plate along the Sunda Trench.
These two tectonic features thus correlate to a similar time of development. The formation of the PFZ was a result of two stages. The first stage began at ~10 Ma, when the northern segments of the PFZ developed due to the convergence of the China Sea Crust underneath the nearby Manila Trench. The lack of accretionary prism at the Philippine ...
The subduction zones that surround most of the archipelago are the source of many of the larger earthquakes that strike the Philippines. This includes both faulting along the plate interfaces and within the subducting slabs. For the Philippine Trench, examples of those on the plate interface are the 1988 M w 7.3 and the 2023 M7.6 events.
The Philippine Sea plate or the Philippine plate is a tectonic plate comprising oceanic lithosphere that lies beneath the Philippine Sea, to the east of the Philippines.Most segments of the Philippines, including northern Luzon, are part of the Philippine Mobile Belt, which is geologically and tectonically separate from the Philippine Sea plate.
The trough is a well-developed basin with active subduction into the Manila Trench system with complexities stemming from the offshore extension of the Philippine Fault System into the trough. Multi-channel seismic data suggests that the basin's sedimentary deposits resulted from multiple periods of emplacement and erosion .