Manila Trench

Coordinates: 14°42′N 119°00′E / 14.700°N 119.000°E / 14.700; 119.000
From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Gilderien (talk | contribs) at 17:00, 1 June 2012 (typo (amd to and)). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

The Manila Trench is an oceanic trench in the South China Sea, located west of the islands of Luzon and Mindoro in the Philippines. The trench reaches a depth of about 5,400 metres (17,700 ft),[1] in contrast with the average depth of the South China Sea of about 1,500 metres (4,900 ft). It is created by subduction, in which the Sunda Plate (part of Eurasian Plate) is subducting under the Philippine Mobile Belt, producing this almost N-S trending trench. The convergent boundary is terminated to the north by the Taiwan collision zone, and to the south by the Mindoro terrane (Sulu-Palawan block colliding with SW Luzon). It is an area pervaded by negative gravity anomalies.[2]

The Manila Trench is associated with frequent earthquakes, and the subduction zone is responsible for the belt of volcanoes on the west side of the Philippine island of Luzon, which includes Mount Pinatubo.

Convergence between the Philippine Mobile Belt and the Sunda Plate have been estimated using GPS measurements, and this value ranges from ~ 50+ mm/yr in Taiwan, to 100 mm/yr near N. Luzon, and ~ 50 mm/yr near Zambales and ~20+mm/yr near Mindoro island.[3]. Plate locking between the Sunda Plate and Luzon is about 1% coupled, almost unlocked as determined by elastic block models, suggesting that the trench absorbs the Philippine Mobile Belt-Eurasian Plate convergence.[4]

Notes

  1. ^ Liu et al. 2007
  2. ^ Bowin et al. 1978; Hayes & Lewis 1984
  3. ^ Rangin et al. 1999; Galgana et al. 2007
  4. ^ Kreemer & Holt 2001; Galgana et al. 2007

References

  • Bowin, C; Lu, RS; Lee, CS; Schouten, H (1978). "Plate Convergence and Accretion in Taiwan-Luzon Region". Am. Assoc. Pet. Geol. Bull. 62: 1645–1672. doi:10.1306/C1EA5260-16C9-11D7-8645000102C1865D. {{cite journal}}: Invalid |ref=harv (help)
  • Hayes, DE; Lewis, SD (1984). "A geophysical study of the Manila trench, Luzon, Philippines. 1. Crustal structure, gravity and regional tectonic evolution". J. Geophys. Res. 89 (B11): 9171–9195. doi:10.1029/JB089iB11p09171. {{cite journal}}: Invalid |ref=harv (help)
  • Galgana, G; Hamburger, M; McCaffrey, R; Corpuz, E (2007). "Analysis of crustal deformation in Luzon, Philippines using geodetic observations and earthquake focal mechanisms" (PDF). Tectonophysics (432): 63–87. doi:10.1016/j.tecto.2006.12.001. {{cite journal}}: Invalid |ref=harv (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Kreemer, C; Holt, WE (2001). "A no-net-rotation model of present-day surface motions". Geophys Res Lett. 28: 4407–4410. doi:10.1029/2001GL013232. {{cite journal}}: Invalid |ref=harv (help)
  • Liu, Y; Santos, A; Wang, S; Shi, Y (2007). "Tsunami hazards along Chinese coast from potential earthquakes in South China Sea (preprint)" (PDF). Physics of The Earth and Planetary Interiors. 163 (1–4): 233–244. doi:10.1016/j.pepi.2007.02.012. {{cite journal}}: Invalid |ref=harv (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Rangin, C; Le Pichon, X; Mazzotti, S; Pubellier, M (1999). "Plate convergence measured by GPS across the Sundaland/Philippine Sea Plate deformed boundary: the Philippines and eastern Indonesia" (PDF). Geophysical Journal International. 139. Taiwan Geological Survey: 296–316. {{cite journal}}: Invalid |ref=harv (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)

External links

Stub icon

This tectonics article is a stub. You can help Wikipedia by expanding it.

14°42′N 119°00′E / 14.700°N 119.000°E / 14.700; 119.000

Retrieved from "https://en.wikipedia.org/w/index.php?title=Manila_Trench&oldid=495485911"