Geodynamic evolution of the Baguio Mineral District: Unlocking the Cenozoic record from clastic rocks

Dimalanta, Carla B.; Yumul, Graciano P.; Imai, Atsushi

doi:10.1016/j.jseaes.2012.09.026

Cited by 7 publications

(8 citation statements)

References 62 publications

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“…A few samples also plot within the quartzose sedimentary provenance. A comparison using the major oxide composition of samples from the Baguio Mineral District (Zigzag, Klondyke, Amlang and Cataguintingan Formations) (Tam et al , 2005; Dimalanta et al , 2013) showed that most samples from the Baguio Mineral District consistently plot in the mafic to intermediate igneous provenance. They display similarities with the Pandan Formation which also indicate influence from a magmatic arc source.…”

Section: Discussionmentioning

confidence: 99%

“…(B) A mixed basic and felsic island arc source is suggested by the Hf versus La/Th diagram (Floyd and Leveridge, 1987). Samples from the Baguio Mineral District (BMD) (Tam et al , 2005; Dimalanta et al , 2013) are also plotted for comparison, (C) Chemical maturity diagram (Suttner and Dutta, 1986) using SiO 2 against Al 2 O 3 + K 2 O + Na 2 O. The Pandan clastic rocks plot consistently in the arid and less chemically mature field and (D) Plot of the Th/Sc versus Zr/Sc ratio for the Pandan Formation samples after McLennan et al (1993).…”

Section: Discussionmentioning

confidence: 99%

“…In the tectonic discrimination diagram of Maynard et al (1982), the Pandan samples plot consistently within the evolved arc to ACM fields (Figure 8A). A comparison was made using samples from the Baguio Mineral District (Tam et al , 2005; Dimalanta et al , 2013), which are characterized by oceanic island arc and ACM depositional settings. Similar trends were observed in the Roser and Korsch (1986) diagram except for a few Pandan samples that plot within the oceanic island arc field (Figure 8B).…”

Section: Discussionmentioning

confidence: 99%

“…This led Dimalanta et al (2017) to conclude that the Palawan Microcontinental Block contains Cathaysian tectonic slivers. Likewise, studies conducted within the Philippine Mobile Belt include those of Tam et al (2005) and Dimalanta et al (2013) in the Baguio Mineral District in northern Luzon. More recent works emphasized the Cenozoic unroofing histories of the Zambales Ophiolite Complex (Dimalanta et al , 2014) in west Luzon and the Samar Ophiolite in Samar Island (Pacle et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Regional tectonic map of the Philippines showing the location of published works on the petrological and geochemical characteristics of sedimentary units in Baguio (Tam et al , 2005; Dimalanta et al , 2013), Zambales (Dimalanta et al , 2014), Samar Island (Pacle et al , 2016), Mindoro Island (Concepcion et al , 2012), Palawan Island (Suzuki et al , 2000; Suggate et al , 2013) and Panay Island (Gabo et al , 2009). The white lines indicate the faults and other tectonic structures from Yumul et al (2008) and Aurelio et al (2013).…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry of the Late Cretaceous Pandan Formation in Cebu Island, Central Philippines: Sediment contributions from the Australian plate margin during the Mesozoic

Rodrigo

Gabo‐Ratio

Queaño

et al. 2020

The Depositional Record

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The Late Cretaceous Pandan Formation in Cebu Island is one of the oldest sedimentary units in the Central Philippines. The inconsistencies in geological descriptions and interpretation of the depositional environment of the Pandan Formation complicated efforts to determine the origin and tectonic history of the basement of Cebu Island. This study therefore looks into the petrological and geochemical characteristics of the Pandan Formation and their implications for the tectonic development of the Philippine Arc during the late Mesozoic. Petrographic analyses indicate significant contribution from mafic sources with additional inputs from felsic rocks, siliciclastics and metamorphic sources. Enrichment of detrital quartz from felsic volcanic and plutonic rocks, as well as from siliciclastic and metamorphic sources, has shifted the SiO 2 composition of the Pandan clastics from a mafic to a more intermediate source. Whole-rock geochemical analyses revealed low SiO 2 /Al 2 O 3 = 4.21, low K 2 O/Na 2 O = 1.16, low Th/Sc = 0.13, low Th/U = 2.78, high La/Th = 4.51, significantly low REEs = ca 76.45 ppm and low La N /Yb N = 4.28. A slight negative chondrite-normalized Eu/Eu* (0.91) anomaly and significantly high PAAS-normalized positive Eu/Eu* (1.39) values are consistent with derivation from a young undissected magmatic arc terrane. Tectonic discrimination diagrams suggest formation in an oceanic island arc to active margin/collision zone modelled to be located at the oceanic leading edge of Australia. Rapid uplift and erosion of the magmatic arc and older allochthonous blocks gave way to the rapid deposition of the Pandan Formation in the Late Cretaceous at the subequatorial region. K E Y W O R D S Australian Plate margin, Mesozoic, provenance, whole-rock and trace element geochemistry 310 | RODRIGO et al. ful to Messrs. Russyl Bryile Anthony Lanzaderas, Felix F I G U R E 1 1 Tectonic model showing the location of the proto-Philippine arc and the East Philippine-Daito arc from Late Jurassic to Late Cretaceous. The fore-arc basin shown on the map corresponds to the depositional basin of the Pandan Formation. Map modified from Deng et al. (2015) | 327 RODRIGO et al.

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Section: Discussionmentioning

confidence: 99%