North Luzon and the Philippine Sea Plate motion model: insights following paleomagnetic, structural, and age-dating investigations

Queano, Karlo L., Ali, Jason R., Millsom, John, Aitchison, Jonathan C. and Pubellier, Manuel (2007) North Luzon and the Philippine Sea Plate motion model: insights following paleomagnetic, structural, and age-dating investigations. Journal of Geophysical Research, 112 B05101.1-B05101.44. doi:10.1029/2006JB004506


Author Queano, Karlo L.
Ali, Jason R.
Millsom, John
Aitchison, Jonathan C.
Pubellier, Manuel
Title North Luzon and the Philippine Sea Plate motion model: insights following paleomagnetic, structural, and age-dating investigations
Journal name Journal of Geophysical Research   Check publisher's open access policy
ISSN 2169-9313
2169-9356
Publication date 2007
Sub-type Article (original research)
DOI 10.1029/2006JB004506
Volume 112
Start page B05101.1
End page B05101.44
Total pages 44
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell
Language eng
Abstract Results of one of the most comprehensive paleomagnetic and supporting geological programs ever carried out in offshore SE Asia on North Luzon, northern Philippines, are reported. Six new results, based on 66 sites, are reported from a total collection of 243 individual sites. Declinations in the data subset are sometimes scattered, likely reflecting combinations of major plate and local rotations in both clockwise and counterclockwise directions, and thus have a somewhat limited value for tectonic modeling. The inclination data are, however, much more valuable and can be best explained if North Luzon traveled as part of the Philippine Sea Plate for most of its history, a scenario which is compatible with the known geology of the eastern Philippines and broader region. In the proposed model, for all of its Eocene-Pliocene history, North Luzon is placed on the western edge of the Philippine Sea Plate, effectively always just to the west of the site where the Benham Plateau formed ~40 Ma. The paleomagnetic data indicate a substantial northward migration of the area since the start of the Neogene, with an earlier interval stretching back to at least the mid-Early Cretaceous when this part of the plate occupied equatorial latitudes. Post-15 Ma motion of the plate has involved the indentation of the Palawan microcontinental block into the western side of the Philippine Archipelago. Deformations induced by this process offer the most likely explanation for the scattered declinations observed in North Luzon and areas a short distance to the south.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Geography, Planning and Environmental Management Publications
 
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Created: Wed, 29 Jul 2015, 12:05:43 EST by Helen Smith on behalf of School of Geography, Planning & Env Management