Geology of the Southern Zambales Ophiolite Complex, (Philippines): juxtaposed terranes of diverse origin
Abstract
The Zambales Ophiolite Complex, which is made up of three massifs—Masinloc, Cabangan and San Antonio, was generated in a subduction-related marginal basin. Combined field geological and geochemical evidences show that the Cabangan and San Antonio massifs are genetically related to the Coto (transitional mid-ocean ridge-island arc) and Acoje (island arc) blocks of the Masinloc massif, respectively. A tectonic contact, the Subic Bay Fault Zone, is believed to separate the San Antonio and Cabangan massifs. The San Antonio massif is a displaced terrane rifted from the Acoje block and translated southward to its present position through the West Luzon Shear (?)/Subic Bay Fault Zone. The Zambales Ophiolite Complex could have not formed through the rifting or folding of the arc-related Acoje block-San Antonio massif to generate the transitional mid-ocean ridge-island arc like Coto block-Cabangan massif!
- Publication:
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Journal of Asian Earth Sciences
- Pub Date:
- August 1997
- DOI:
- 10.1016/S0743-9547(97)00019-6
- Bibcode:
- 1997JAESc..15..413Y