Radiolarian biostratigraphic data from the Casiguran Ophiolite, Northern Sierra Madre, Luzon, Philippines: Stratigraphic and tectonic implications

Queano, Karlo L., Marquez, Edanjarlo J., Aitchison, Jonathan C. and Ali, Jason R. (2013) Radiolarian biostratigraphic data from the Casiguran Ophiolite, Northern Sierra Madre, Luzon, Philippines: Stratigraphic and tectonic implications. Journal of Asian Earth Sciences, 65 131-142. doi:10.1016/j.jseaes.2012.10.024


Author Queano, Karlo L.
Marquez, Edanjarlo J.
Aitchison, Jonathan C.
Ali, Jason R.
Title Radiolarian biostratigraphic data from the Casiguran Ophiolite, Northern Sierra Madre, Luzon, Philippines: Stratigraphic and tectonic implications
Journal name Journal of Asian Earth Sciences   Check publisher's open access policy
ISSN 1367-9120
1878-5786
Publication date 2013-03-25
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.jseaes.2012.10.024
Open Access Status
Volume 65
Start page 131
End page 142
Total pages 12
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Collection year 2013
Language eng
Abstract Results from the first detailed radiolarian biostratigraphic study conducted in Luzon are reported. The data were obtained from cherts associated with the Casiguran Ophiolite, a dismembered ophiolite mass consisting of serpentinized peridotites, gabbros, dolerite dikes and pillow basalts exposed along the eastern coast of the Northern Sierra Madre, Luzon, Philippines. Cherts and limestone interbeds conformably overlie the ophiolite. The radiolarian assemblages from the cherts constrain the stratigraphic range of the cherts to the Lower Cretaceous (upper Barremian-lower Aptian to Albian). This new biostratigraphic result is in contrast with the Upper Cretaceous stratigraphic range previously reported in the region.Radiolarian biostratigraphic results from the Casiguran Ophiolite provide additional evidence for the existence of Mesozoic oceanic substratum upon which Luzon and neighboring regions within the Philippine archipelago were likely built. Interestingly, the result closely resembles those reported for the ophiolite in southeastern Luzon as well as the oceanic crust of the Huatung Basin situated east of Taiwan and the ophiolites in eastern Indonesia. In light of this, along with previously gathered geochemical data from the ophiolites, a common provenance is being looked into for these crust-upper mantle sequences in the western Pacific region.
Keyword Early Cretaceous
Luzon
Ophiolites
Radiolarians
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Geography, Planning and Environmental Management Publications
 
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Created: Fri, 27 Feb 2015, 10:32:18 EST by Helen Smith on behalf of School of Geography, Planning & Env Management