Cenozoic tectonics in the Buruanga Peninsula, Panay Island, Central Philippines, as constrained by U–Pb, 40Ar/39Ar and fission track thermochronometers

Walia, Monika; Yang, T. F.; Knittel, Ulrich; Liu, T.-K.; Lo, Ching–Hua; Chung, Sun‐Lin; Teng, Louis S.; Dimalanta, Carla B.; Yumul, Graciano P.; Yuan, Wanming

doi:10.1016/j.tecto.2012.10.002

Cited by 25 publications

(36 citation statements)

References 47 publications

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“…K–Ar ages of 12 ± 0.2 Ma obtained for micas extracted from a quartz‐mica schist from Tablas and from a mica‐schist from Romblon (Dimalanta et al ) are considered to date the youngest metamorphic event, probably related to the collision of the PCT with the PMB. This conclusion is supported by fission track cooling ages in the range 14–8 Ma from the vicinity of the suture zone in Panay that could be correlated with specific events related to the collision (Walia et al ).…”

Section: Regional Geologymentioning

confidence: 79%

“…Light gray bands indicate significant episodes of zircon production at 110–130 Ma and 250–270 Ma. Data for Palawan and Panay comes from Walia et al (), data for Lasala sediments is unpublished data of the authors (available upon request).…”

Section: Resultsmentioning

confidence: 99%

“…). Recent data collected from the Romblon Island Group and Panay Island (Dimalanta et al ; Gabo et al ; Walia et al ) show that the collision boundary between the PCT and PMB lies farther east of where it was previously drawn, i.e. across the island of Mindoro (e.g.…”

Section: Regional Geologymentioning

confidence: 99%

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Diverse protolith ages for the Mindoro and Romblon Metamorphics (Philippines): Evidence from single zircon U–Pb dating

et al. 2017

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Within the north-eastern part of the Palawan Continental Terrane, which forms the south-western part of the Philippine archipelago, several metamorphic complexes are exposed that are considered to be rifted parts of the Asian margin in South-East China. The protolith age(s) and correlations of these complexes are contentious. The largest metamorphic complex of the Palawan Continental Terrane comprises the Mindoro Metamorphics. The north-eastern part of this metamorphic complex has recently been found to be composed of protoliths of Late Carboniferous to Late Permian protolith age. However, meta-sediments exposed at the westernmost tip and close to the southern boundary of the exposure of the Mindoro Metamorphics contain detrital zircons and with U-Pb ages, determined by LA-ICP-MS, in the range 22-56 Ma. In addition, zircons as young as 112 Ma were found in a sample of the Romblon Metamorphics in Tablas. As the youngest detrital zircons provide an upper age limit for the time of deposition in metasediments, these results suggest that the Mindoro and Romblon Metamorphics comprise protoliths of variable age: Late Carboniferous to Late Permian in NE Mindoro; Eocene or later in NW Mindoro; Miocene at the southern margin of the Mindoro metamorphics; and Cretaceous or later on Tablas. The presence of non-metamorphic sediments of Late Eocene to Early Oligocene age in Mindoro (Lasala Formation), which are older than the youngest metasediments, suggests that metamorphism of the young meta-sediments of Mindoro is the result of the collision of the Palawan Continental terrane with the Philippine Mobile Belt in Late Miocene. Similarities of the age spectra of zircons from the Eocene to Miocene metamorphics with the Eocene to Early Miocene Lasala Formation suggest that the protoliths of the young metamorphics may be equivalents of the Lasala Formation or were recycled from the Lasala Formation.

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Section: Regional Geologymentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

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Diverse protolith ages for the Mindoro and Romblon Metamorphics (Philippines): Evidence from single zircon U–Pb dating

et al. 2017

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“…It is believed that the collision was initiated during the early Miocene and was completed in Pliocene (e.g., Karig, 1983;Walia et al, 2013).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Early Cretaceous arc volcanic suite in Cebu Island, Central Philippines and its implications on paleo-Pacific plate subduction: Constraints from geochemistry, zircon U–Pb geochronology and Lu–Hf isotopes

Deng

Yang

Zhang

et al. 2015

Lithos

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“…Ar ages of 18.52 ± 0.06 and 18.71 ± 0.05 Ma from biotite separates (Walia et al 2013). Small highly weathered basaltic rock exposures are also present in the Buruanga Peninsula, although they are too small to be mappable.…”

mentioning

confidence: 95%

Terrane Boundary Geophysical Signatures in Northwest Panay, Philippines: Results from Gravity, Seismic Refraction and Electrical Resistivity Investigations

Gabo¹,

Dimalanta²,

Yumul³

et al. 2015

Terr. Atmos. Ocean. Sci.

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Northwest Panay consists of two terranes that form part of the Central Philippine collision zone: Buruanga Peninsula and Antique Range. The Buruanga Peninsula consists of a Jurassic chert-clastic-limestone sequence, typical of oceanic plate stratigraphy of the Palawan Micro-continental Block. The Antique Range is characterized by Antique Ophiolite Complex peridotites and Miocene volcanic and clastic rocks, representing obducted oceanic crust that serves as the oceanic leading edge of the collision with the Philippine Mobile Belt. The Nabas Fault is identified as the boundary between the two terranes. This study employed the gravity method to characterize the Northwest Panay subsurface structure. Results indicate higher Bouguer anomaly values for Buruanga Peninsula than those for Antique Range, separated by a sudden decrease in gravity values toward the east-southeast (ESE) direction. Forward gravity data modeling indicates the presence of an underlying basaltic subducted slab in the Buruanga Peninsula. Furthermore, the Nabas Fault is characterized as an east-dipping thrust structure formed by Buruanga Peninsula basement leading edge subduction beneath Antique Range. Additional geophysical constraints were provided by shallow seismic refraction and electrical resistivity surveys. Results from both methods delineated the shallow subsurface signature of the Nabas Fault buried beneath alluvium deposits. The gravity, seismic refraction and electrical resistivity methods were consistent in identifying the Nabas Fault as the terrane boundary between the Buruanga Peninsula and the Antique Range. The three geophysical methods helped constrain the subsurface configuration in Northwest Panay.

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Cenozoic tectonics in the Buruanga Peninsula, Panay Island, Central Philippines, as constrained by U–Pb, 40Ar/39Ar and fission track thermochronometers

Cited by 25 publications

References 47 publications

Diverse protolith ages for the Mindoro and Romblon Metamorphics (Philippines): Evidence from single zircon U–Pb dating

Diverse protolith ages for the Mindoro and Romblon Metamorphics (Philippines): Evidence from single zircon U–Pb dating

Early Cretaceous arc volcanic suite in Cebu Island, Central Philippines and its implications on paleo-Pacific plate subduction: Constraints from geochemistry, zircon U–Pb geochronology and Lu–Hf isotopes

Terrane Boundary Geophysical Signatures in Northwest Panay, Philippines: Results from Gravity, Seismic Refraction and Electrical Resistivity Investigations

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