South China continental margin signature for sandstones and granites from Palawan, Philippines

Suggate, Simon M.; Cottam, Michael A.; Hall, Robert; Sevastjanova, Inga; Forster, Marnie; White, L.B.; Armstrong, Richard; Carter, Andrew; Mojares, Edwin M.

doi:10.1016/j.gr.2013.07.006

Cited by 64 publications

(66 citation statements)

References 77 publications

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“…In Palawan, the widely exposed metamorphosed Cretaceous to Eocene turbidities suggest a deep water depositional environment [ Aurelio et al ., ]. Previous geochemical analysis [ Suzuki et al ., ] and detrital zircon geochronology [ Walia et al ., ; Suggate et al ., ] of these syn‐rift sediments revealed the Asian mainland origin for the Palawan Continental Terrane. By the Oligocene, the water depth in this area had become shallow allowing the widespread deposition of the Nido Limestone.…”

Section: Discussionmentioning

confidence: 95%

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Detrital zircon provenance of the Paleogene syn‐rift sediments in the northern South China Sea

Shao

Cao

Pang

et al. 2016

Geochem Geophys Geosyst

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The early rift sedimentation history of the South China Sea is still not well understood due to restricted borehole coverage of the Paleogene strata and lack of reliable stratigraphic dating. We use detrital zircon U‐Pb geochronology to explore the source‐to‐sink characteristics of syn‐rift sequences in the northern South China Sea. The results reveal significant intrabasinal provenances in addition to the well‐perceived terrigenous supply from the north. The Dongsha Uplift is considered to account for the dominance of the Early Cretaceous zircons in the Eocene samples. The Lower Oligocene sediments in the Qiongdongnan Basin could have been sourced from Hainan Island and local uplifts, but their distinction cannot be confirmed by the U‐Pb age spectra. Contemporary sediments in the northern Pearl River Mouth Basin were most likely transported from southeastern South China with well‐rounded zircon grains showing U‐Pb age similarity to those from the northeastern tributaries of the Pearl River. By contrast, intrabasinal sources from the west and east are suggested to have contributed the infill of the southern part of the Pearl River Mouth Basin based on generally euhedral zircon shapes. These sedimentary source patterns appear to change very little in the Oligocene northern South China Sea. However, the newly detected Neoproterozoic zircons in the Upper Oligocene sediments from borehole L21 tend to indicate a southern source. The episodic and diachronic nature of rifting and erosion processes in the early South China Sea is the cause of complex patterns in the Paleogene provenance history.

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Section: Discussionmentioning

confidence: 95%

“…Age data for Northwest Borneo are from sandstones [ van Hattum et al ., ]. Age data for the Palawan Continental Terrane are from the Late Cretaceous‐Eocene meta‐sediments [ Walia et al ., ; Suggate et al ., ] with its Oligocene panels omitted due to carbonate sedimentation at that time. N—number of concordant analyses.…”

Section: Discussionmentioning

confidence: 99%

Detrital zircon provenance of the Paleogene syn‐rift sediments in the northern South China Sea

Shao

Cao

Pang

et al. 2016

Geochem Geophys Geosyst

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“…1) are the products in south Sabah of this NW-directed subduction. Celebes Sea subduction rollback in the Early and Middle Miocene is suggested (Hall 2013) to have resulted in granite magmatism in Palawan at 14-13 Ma (Suggate et al 2013) and possibly Kinabalu at 8-7 Ma (Cottam et al 2010), with extension preceding magmatism by c. 2-3 Ma. These episodes of extension could account for emergence and growth of a landmass in Sabah during the Middle and Late Miocene (e.g.…”

Section: Neogene Tectonics Of Northern Borneomentioning

confidence: 99%

Neogene rock uplift and erosion in northern Borneo: evidence from the Kinabalu granite, Mount Kinabalu

Cottam

Hall

Sperber

et al. 2013

JGS

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Thermochronological data from the Kinabalu granite, emplaced between c. 7.2 and 7.8 Ma, provide a unique record of northern Borneo's exhumation during the Neogene. Biotite 40 Ar/ 39 Ar ages (c. 7.32-7.63 Ma) record rapid cooling of the granite in the Late Miocene as it equilibrated with ambient crustal temperatures. Zircon fission-track ages (c. 6.6-5.8 Ma) and apatite (U-Th-Sm)/He ages (central age c. 5.5 Ma) indicate rapid cooling during the Late Miocene-Early Pliocene. This cooling reflects exhumation of the granite, uplift and erosion bringing it closer to the Earth's surface. Thermochronological age versus elevation relationships suggest exhumation rates of more than 7 mm a −1 during the latest Miocene and Early Pliocene. Neither the emplacement of the Kinabalu granite nor its exhumation is related to the Sabah orogeny, which terminated in the Early Miocene. Instead, granite magmatism was caused by extension related to subduction rollback of the Sulu Arc, and Mio-Pliocene exhumation of the Kinabalu granite was driven either by lithospheric delamination or break-off of a subducted slab beneath Sabah. Plio-Pleistocene tectonism offshore and onshore northern Borneo reflects continuing large-scale gravity-driven tectonics in the region.

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“…The sampling site is situated at the geographical coordinates, 10°41′31.84″ north latitude and 119°20′20.29″ east longitude. The geology of Palawan Island can be divided into two blocks, the North Palawan Continental Terrane (NPCT) and the South Palawan Terrane . The NPCT is made up of continental‐derived metamorphic and sedimentary rocks, and the South Palawan Terrane comprises of ophiolitic rocks and Cenozoic clastic sediments .…”

Section: Methodsmentioning

confidence: 99%

“…The geology of Palawan Island can be divided into two blocks, the North Palawan Continental Terrane (NPCT) and the South Palawan Terrane . The NPCT is made up of continental‐derived metamorphic and sedimentary rocks, and the South Palawan Terrane comprises of ophiolitic rocks and Cenozoic clastic sediments . The sampling site located in Barangay Ombo, San Vicente, is part of the Kapoas granite that intrudes Permian and Jurassic sequence of the NPCT .…”

Section: Methodsmentioning

confidence: 99%

Determination of the REE content, geological age, and absorbed alpha dose of allanite mineral from Palawan, Philippines

Dingle

Jecong²,

Hila³

et al. 2019

X-Ray Spectrometry

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Allanite is a common accessory mineral in igneous rocks that contains significant amounts of rare‐earth elements (REEs), thorium (Th), and uranium (U). The presence of Th and U in the allanite exposes it to radiation resulting in radiation damage in its crystal structure and further leads to metamictization. Hence, allanite can be used as a natural analogue to assess the long‐term radiation effects in materials for high‐level nuclear waste disposal. It provides information on the effect of α‐decay on the crystal structure including the stability and integrity of the material. In this study, the absorbed α‐dose of allanite from Ombo, Palawan, Philippines, was estimated from the Th and U content and geological age of the mineral using X‐ray fluorescence and gamma‐ray spectrometry. The amount of Th and REE was measured to be around 1.37 and ~30.4 wt.%, respectively. Radiometric dating using gamma‐ray spectrometry estimated the age of the allanite mineral to be around 24–35 million years. Having obtained the amount of radioactivity and the time of exposure, the corresponding absorbed α‐dose was estimated to be at 2.84 × 1014 α‐decays/mg. Results suggest that the allanite mineral studied has not accumulated significant radiation damage to cause amorphization and still exhibit a crystalline structure. This study may provide data on the properties of allanite or silicate matrices as part of the ongoing studies on silicate minerals as natural analogues.

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South China continental margin signature for sandstones and granites from Palawan, Philippines

Cited by 64 publications

References 77 publications

Detrital zircon provenance of the Paleogene syn‐rift sediments in the northern South China Sea

Detrital zircon provenance of the Paleogene syn‐rift sediments in the northern South China Sea

Neogene rock uplift and erosion in northern Borneo: evidence from the Kinabalu granite, Mount Kinabalu

Determination of the REE content, geological age, and absorbed alpha dose of allanite mineral from Palawan, Philippines

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