Collision Boundaries Along the Western Philippine Archipelago

Yumul, Graciano P.; Jesus, Joel V. De; Jiménez, Francisco

doi:10.1016/s1342-937x(05)70618-3

Cited by 11 publications

(8 citation statements)

References 5 publications

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“…The Philippines is characterized by a complex pattern of subduction zones, collision zones, island arcs and marginal basins, which are rapidly evolving (e.g. Yumul et al 2001b). The archipelago is bounded on both flanks by oppositely dipping subduction systems.…”

Section: Regional Geologymentioning

confidence: 99%

Westward younging disposition of Philippine ophiolites and its implication for arc evolution

Yumul

2007

Island Arc

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The different ophiolite complexes in the Philippine island arc system define a progressive younging direction westward. This resulted from the clockwise rotation of the Philippine island arc system during its north-westward translation in the Eocene resulting in its western boundary colliding with the Sundaland-Eurasian margin. As a consequence of this interaction, ophiolite complexes and mélanges accreted into the Philippine island arc system along its western side. A new ophiolite zonation with four belts is proposed that takes into consideration the observed spatial and temporal relationships of the exposed oceanic lithosphere slices. With progressive younging from east to west, Belt 1 corresponds to Late Cretaceous complete ophiolite complexes with associated metamorphic soles along the eastern Philippines, whereas Belt 2 includes Early to Late Cretaceous dismembered ultramafic-mafic complexes with mélanges exposed mainly west of eastern Philippines. Belt 3 is defined by Cretaceous through Eocene to Oligocene ophiolite complexes emplaced along the collision zone between the Philippine Mobile Belt and the Sundaland-Eurasian margin. Belt 4 corresponds to the ophiolite complexes emplaced along continental margins as exposed in the Palawan and Zamboanga-Sulu areas. This proposed zonation hints that the whole Philippine Mobile Belt, except for the strike-slip fault bounded Eocene Zambales ophiolite complex in Luzon, is underlain by Cretaceous proto-Philippine Sea Plate fragments. This is contrary to the previous models that consider only the eastern margin of the Philippines to contain proto-Philippine Sea Plate materials.

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Section: Regional Geologymentioning

confidence: 99%

Westward younging disposition of Philippine ophiolites and its implication for arc evolution

Yumul

2007

Island Arc

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“…The evolution of this island arc system, sandwiched between two oppositely dipping subduction zone systems, involves subduction of oceanic crusts of varying ages (e.g. Yumul et al . 2001).…”

Section: Introductionmentioning

confidence: 99%

Silicic arc volcanism in Central Luzon, the Philippines: Characterization of its space, time and geochemical relationship

et al. 2003

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The silicic volcanic rocks in Central Luzon show a temporal and spatial relationship with its geochemistry. Volcanic centers dated to approximately 5 Ma are silicic in geochemical composition whereas those between <5–1 Ma expose basaltic to andesitic rocks. Volcanic centers dated <1 Ma are characterized by a wide range of geochemistry encompassing basaltic through andesitic to dacitic signatures. Aside from changes in geochemistry through time, the areas (i.e. fore‐arc to back‐arc region) where the volcanic centers are formed also vary. The shift in the location of the volcanic centers in Central Luzon is attributed to changes in the dip of subduction of the South China Sea crust along the Manila Trench. Flat subduction resulted from the subduction of the Scarborough Seamount Chain, an oceanic bathymetric high along the Manila Trench west of northern Luzon. However, collision of Luzon with Taiwan in the north and Palawan in the south resulted in steepening of the subduction angle. The silicic volcanic centers in the forearc (Ce/Yb = 20–140) and back‐arc (Ce/Yb = 20–60) regions are generally characterized by higher Ce/Yb compared to the basaltic‐andesitic volcanic rocks in the main volcanic arc (Ce/Yb = 20) and back‐arc (Ce/Yb = 20–30) regions. This across‐arc geochemical variation highlights the contributions from the slab, mantle and crust coupled with the effects of geochemical processes that include partial melting, fractionation, magma mixing and mantle–melt interaction.

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“…The Philippines, as a whole, is characterized by a complex pattern of subduction zones, collision zones, island arcs and marginal basins which have and are, rapidly evolving (e.g. Aurelio 2000;Yumul et al 2001). The Philippine archipelago is bounded on both flanks by oppositely dipping subduction systems (Fig.…”

Section: The Philippine Archipelagomentioning

confidence: 99%

“…1) (e.g. Rangin et al 1999a, b;Yumul et al 2001). The basement of the Peninsula is made up of the regionally metamorphosed Tungauan Schist.…”

Section: Sundalandmentioning

confidence: 99%

Geology of the Zamboanga Peninsula, Mindanao, Philippines: an enigmatic South China continental fragment?

Yumul

Dimalanta

Tamayo

et al. 2004

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Collision Boundaries Along the Western Philippine Archipelago

Cited by 11 publications

References 5 publications

Westward younging disposition of Philippine ophiolites and its implication for arc evolution

Westward younging disposition of Philippine ophiolites and its implication for arc evolution

Silicic arc volcanism in Central Luzon, the Philippines: Characterization of its space, time and geochemical relationship

Geology of the Zamboanga Peninsula, Mindanao, Philippines: an enigmatic South China continental fragment?

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