What underlies the Philippine island arc? Clues from the Calaton Hill, Tablas island, Romblon (Central Philippines)

Payot, Betchaida D.; Arai, Shoji; Tamayo, Rodolfo A.; Yumul, Graciano P.

doi:10.1016/j.jseaes.2009.07.001

Cited by 12 publications

(4 citation statements)

References 76 publications

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“…Gervasio ; Faure et al . ; Dimalanta et al ; Payot et al ). Taken together, these units comprise a relatively extensive deformational region which is ascribed to different collision events that are variably given ages between Late Oligocene and Middle Miocene (McCabe et al ; Karig ; Rangin et al ; Queano et al ; Yumul et al ).…”

Section: Regional Geologymentioning

confidence: 99%

“…Relatively extensive occurrences of metamorphic rocks have been reported from the PCTon Palawan, Mindoro, Lubang, Tablas, Romblon, Sibuyan (e.g. Gervasio 1967;Faure et al 1989;Dimalanta et al 2009;Payot et al 2009). Taken together, these units comprise a relatively extensive deformational region which is ascribed to different collision events that are variably given ages between Late Oligocene and Middle Miocene (McCabe et al 1982;Karig 1983;Rangin et al 1985;Queano et al 2007;Yumul et al 2008).…”

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: 99%

Section: Regional Geologymentioning

confidence: 99%

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

et al. 2017

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“…The similarity of REE patterns between clinopyroxenes and amphiboles possibly indicates strong modification by a hydrous melt [59,60] during metamorphism, which is also suggested by their textural relationship.…”

Section: Metamorphism and Pressure-temperature Pathmentioning

confidence: 78%

Contrasting Textural and Chemical Signatures of Chromitites in the Mesoarchaean Ulamertoq Peridotite Body, Southern West Greenland

et al. 2018

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Peridotites occur as lensoid bodies within the Mesoarchaean orthogneiss in the Akia terrane of Southern West Greenland. The Ulamertoq peridotite body is the largest of these peridotites hosted within the regional orthogneiss. It consists mainly of olivine, orthopyroxene, and amphibole-rich ultramafic rocks exhibiting metamorphic textural and chemical features. Chromitite layers from different localities in Ulamertoq show contrasting characteristics. In one locality, zoned chromites are hosted in orthopyroxene-amphibole peridotites. Compositional zonation in chromites is evident with decreasing Cr and Fe content from core to rim, while Al and Mg increase. Homogeneous chromites from another locality are fairly uniform and Fe-rich. The mineral chemistry of the major and accessory phases shows metamorphic signatures. Inferred temperature conditions suggest that the zoned chromites, homogeneous chromites, and their hosts are equilibrated at different metamorphic conditions. In this paper, various mechanisms during the cumulus to subsolidus stages are explored in order to understand the origin of the two contrasting types of chromites.

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“…In addition, it can also be noted that the amphibole in the Sibuyan gabbronorites show some minor similarities in terms of Rb, Ba, Ti and Pb abundance with the amphiboles from the Calaton Hill metamorphic/plutonic complex. The Calaton Hill hightemperature metamorphic/plutonic complex is located in thenearbyTablasislandandhadbeenpreviouslyidentifiedasarc -related in origin (Payot et al, 2009b).…”

Section: Nature Of the Melt Involvedmentioning

confidence: 99%

Abyssal harzburgite veined by silica-oversaturated melt in the Sibuyan Ultramafics, Romblon, Central Philippines

Payot

Arai

Tamayo³

2011

Journal of Mineralogical and Petrological Sciences

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Thin discordant gabbronorite veins (~ 0.5 mm to 3 cm in width) occur within remarkably fresh harzburgite boul dersoftheSibuyanUltramafics.Theharzburgitehostrockdisplaysprotogranulartoporphyroclastictextures andisdominantlycomposedofolivine,orthopyroxenewithminoramountsofclinopyroxene,spinelandamphibole.Themineralchemistryoftheharzburgiteiscomparabletodepletedabyssalperidotitesasshownbythe Fo content of the olivine (= 90 -91)andCr#ofthespinel(=0.40 -0.52). The gabbronorites are coarse -grained adcumulates and comprised of orthopyroxene, plagioclase and amphibole. Plagioclase in the gabbronorites shows highAn contentwhereas both orthopyroxeneand amphiboleshow variableMg# almostsimilarto reportedvaluesfromarcgabbros.Thecontactbetweentheharzburgiteandthegabbronoriteveinsisdemarcated bytheformationofsecondaryorthopyroxenewithlowCr 2 O 3 andCaOcontents.Clinopyroxeneintheharzburgiteshowsstrongenrichmentinlightrareearthelements(LREEs).Amphibolerimmingtheclinopyroxenein theharzburgitehassimilarpatternsastheclinopyroxenebutwithmuchhigherREEabundance.Theamphibole in the gabbronorites also shows enrichment in LREEs, Rb, Ba andTi.We propose that the harzburgite -gabbronoriteoccurrenceintheSibuyanUltramaficsisaproductofmantle -melt reaction. The metasomatic agent is a silicate melt enriched in Si, Cr, Fe and LREEs. At a bigger scale, the harzburgite -gabbronorite connection observedintheSibuyanUltramaficspossiblydocumentsearlystagemodificationandconversionofabyssalperidotitestoophioliticperidotitesbySSZ -related melts.

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What underlies the Philippine island arc? Clues from the Calaton Hill, Tablas island, Romblon (Central Philippines)

Cited by 12 publications

References 76 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

Contrasting Textural and Chemical Signatures of Chromitites in the Mesoarchaean Ulamertoq Peridotite Body, Southern West Greenland

Abyssal harzburgite veined by silica-oversaturated melt in the Sibuyan Ultramafics, Romblon, Central Philippines

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