Onland signatures of the Palawan microcontinental block and Philippine mobile belt collision and crustal growth process: A review

Yumul, Graciano P.; Dimalanta, Carla B.; Marquez, Edanjarlo J.; Queaño, Karlo L.

doi:10.1016/j.jseaes.2008.10.002

Cited by 134 publications

(110 citation statements)

References 93 publications

(102 reference statements)

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“…2) (Yumul et al 2004), which Huxley grouped with the volcanic Philippine islands. In addition, Palawan's positioning close to (and perhaps connected to) Borneo is a relatively recent phenomenon, happening only in the past 10 million years, in contrast to various volcanic formations that formed earlier off the coast of Borneo and are now part of the Philippine Archipelago (Hall 2002;Yumul et al 2009). Cases of lineages of organisms that cross Huxley's line have made obsolete the notion that Philippine biogeography is best understood by a single biotic break between it and Borneo, and Palawan in particular has been shown to play different roles for different lineages (Essylstyn et al 2010;Siler et al 2010).…”

mentioning

confidence: 99%

An old lineage of Cyphophthalmi (Opiliones) discovered on Mindanao highlights the need for biogeographical research in the Philippines

Clouse¹,

General

Diesmos

et al. 2011

Journal of Arachnology

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mentioning

confidence: 99%

An old lineage of Cyphophthalmi (Opiliones) discovered on Mindanao highlights the need for biogeographical research in the Philippines

Clouse¹,

General

Diesmos

et al. 2011

Journal of Arachnology

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“…The Philippines is sandwiched between the Philippine Sea Plate and the Sundaland-Eurasian Plate (e.g., Encarnación 2004;Dimalanta et al 2009;Yumul et al 2009;Knittel et al 2010). It is bound by the discontinuous eastdipping Manila-Negros-Sulu-Cotabato trench system to the west (e.g., Cardwell et al 1980;Hayes and Lewis 1985;Bautista et al 2001) and by the East Luzon Trough-Philippine Trench system to the east (Ozawa et al 2004).…”

Section: Regional Geologic Settingmentioning

confidence: 99%

Geochemical and Geophysical Characteristics of the Balud Ophiolitic Complex (BOC), Masbate Island, Philippines: Implications for its Generation, Evolution and Emplacement

Manalo¹,

Dimalanta²,

Faustino-Eslava³

et al. 2015

Terr. Atmos. Ocean. Sci.

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This paper presents the first field, geochemical and geophysical information on the recently recognized Early Cretaceous Balud Ophiolitic Complex (BOC) in the island of Masbate in the Central Philippines. Mapping of the western limb of the island revealed that only the upper crustal section of the BOC is exposed in this area. Geochemically, the pillow basalts are characterized by transitional mid-oceanic ridge basalt-island arc tholeiitic compositions. Gravity surveys yielded low Bouguer anomaly values that are consistent with the highly dismembered nature of the BOC. Short wavelength, high amplitude magnetic anomalies registered across the study area are attributed to shallow magnetic sources. This is taken to support the model that the ophiolitic complex occurs as thin crustal slivers that are not deeply-rooted in the mantle. Comparing BOC with other ophiolites in the Central Philippines, such as those in the islands of Sibuyan, Leyte and Bohol, suggests the possibility of a common or contiguous source for similarly-aged and geochemically composed crust-mantle sequences in the region.

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“…1a). Recent investigations in the area have reported the existence of the Sibuyan Ophiolite Complex whose components are dominantly exposed in the Tablas and Sibuyan islands (Ramos et al, 2005;Yumul et al, 2009;Dimalanta et al, 2009). Our study is solely focused on the Sibuyan Ultramafics which is exposed at the central portion of the Sibuyan Island and corresponds to the mantle section of the reported Sibuyan Ophiolite Complex (Fig.…”

Section: Sample Description and Petrographymentioning

confidence: 99%

Unusual ultra-depleted dunite from Sibuyan Island (the Philippines): a residue for ultra-depleted MORB?

Payot

Arai

Tamura

et al. 2009

Journal of Mineralogical and Petrological Sciences

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Ultra -depleted dunites from the Sibuyan Island, Romblon (Central Philippines) are primarily composed of olivine, orthopyroxene (<5%), trace clinopyroxene and chromian spinel and are totally free of hydrous minerals and plagioclase. Mineral chemistry shows very refractory compositions (olivine Fo = 92 -94; spinel Cr# > 0.75). Rare clinopyroxene preserved in the ultra -depleted dunites is anhedral and interstitial to olivine grains. They are neither subsolidus exsolution products from orthopyroxene nor metasomatic in origin. Clinopyroxene has high Mg# = 0.94 -0.97 and low Al 2 O 3 contents (<0.85 wt%). They are also very depleted in trace elements with only selected heavy rare earth elements detected during the LA -ICP -MS analysis. Light to middle REEs and LILEs were hardly detected, which is indicative of the very depleted character of the melt that precipitated the clinopyroxene. The calculated melts in equilibrium with the clinopyroxene have heavy REE contents similar to olivinehosted ultra -depleted melts of MORB affinity from the East Pacific Rise and the Mid -Atlantic Ridge. The formation of the Sibuyan ultra -depleted dunites is being attributed to extremely high degree of dry melting below a mid -oceanic ridge.

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Onland signatures of the Palawan microcontinental block and Philippine mobile belt collision and crustal growth process: A review

Cited by 134 publications

References 93 publications

An old lineage of Cyphophthalmi (Opiliones) discovered on Mindanao highlights the need for biogeographical research in the Philippines

An old lineage of Cyphophthalmi (Opiliones) discovered on Mindanao highlights the need for biogeographical research in the Philippines

Geochemical and Geophysical Characteristics of the Balud Ophiolitic Complex (BOC), Masbate Island, Philippines: Implications for its Generation, Evolution and Emplacement

Unusual ultra-depleted dunite from Sibuyan Island (the Philippines): a residue for ultra-depleted MORB?

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