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Article: Volcanic-hypabyssal rock geochemistry of a subduction-related marginal basin ophiolite: Southeast Bohol Ophiolite-Cansiwang Mélange Complex, Central Philippines

TitleVolcanic-hypabyssal rock geochemistry of a subduction-related marginal basin ophiolite: Southeast Bohol Ophiolite-Cansiwang Mélange Complex, Central Philippines
Authors
KeywordsForearc
Geochemistry
Ophiolite
Philippines
Suprasubduction
Issue Date2006
PublisherHan Rim Won Publishing Company. The Journal's web site is located at http://gj.gskorea.or.kr
Citation
Geosciences Journal, 2006, v. 10 n. 3, p. 291-303 How to Cite?
AbstractThe Early Cretaceous Southeast Bohol OphioliteCansiwang Mélange Complex and the Alicia Schist form the basement of southeastern Bohol Island in central Philippines. New geochemical data show that four discrete groups constitute the volcanic and associated hypabyssal rocks of the ophiolite-mélange complex: boninitic rocks (BON), enriched and normal mid-ocean ridge basalt-like rocks (E-MORB; NMORB) and high-magnesian andesites (HMA). Of these four groups, the BON are the most depleted in REEs and with the most pronounced negative Nb anomalies. Both MORB-like types exhibit subduction-zone influence as reflected in their slight negative Nb anomalies. Characteristically with flat and LREE-depleted patterns, the HMA samples appear to mimic N-MORB patterns but with lower REE concentrations. This geochemical diversity is best explained by a suprasubduction zone environment of formation as is also evident from field geological information. Formation of the Cansiwang Mélange is believed to have been concurrent with the ophiolite's emplacement by subduction-accretion along a forearc margin. This tectonic boundary was later jammed into inactivity with the entry of the Alicia Schist that most likely was an oceanic bathymetric high. The intercalation of both tuffaceous materials and pelagic chert with the pillow basalts are consistent with a marginal basin tectonic setting.
Persistent Identifierhttp://hdl.handle.net/10722/151196
ISSN
2015 Impact Factor: 0.922
2015 SCImago Journal Rankings: 0.305
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFaustino, DVen_HK
dc.contributor.authorYumul Jr, GPen_HK
dc.contributor.authorDimalanta, CBen_HK
dc.contributor.authorDe Jesus, JVen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorAitchison, JCen_HK
dc.contributor.authorTamayo Jr, RAen_HK
dc.date.accessioned2012-06-26T06:18:31Z-
dc.date.available2012-06-26T06:18:31Z-
dc.date.issued2006en_HK
dc.identifier.citationGeosciences Journal, 2006, v. 10 n. 3, p. 291-303en_HK
dc.identifier.issn1226-4806en_HK
dc.identifier.urihttp://hdl.handle.net/10722/151196-
dc.description.abstractThe Early Cretaceous Southeast Bohol OphioliteCansiwang Mélange Complex and the Alicia Schist form the basement of southeastern Bohol Island in central Philippines. New geochemical data show that four discrete groups constitute the volcanic and associated hypabyssal rocks of the ophiolite-mélange complex: boninitic rocks (BON), enriched and normal mid-ocean ridge basalt-like rocks (E-MORB; NMORB) and high-magnesian andesites (HMA). Of these four groups, the BON are the most depleted in REEs and with the most pronounced negative Nb anomalies. Both MORB-like types exhibit subduction-zone influence as reflected in their slight negative Nb anomalies. Characteristically with flat and LREE-depleted patterns, the HMA samples appear to mimic N-MORB patterns but with lower REE concentrations. This geochemical diversity is best explained by a suprasubduction zone environment of formation as is also evident from field geological information. Formation of the Cansiwang Mélange is believed to have been concurrent with the ophiolite's emplacement by subduction-accretion along a forearc margin. This tectonic boundary was later jammed into inactivity with the entry of the Alicia Schist that most likely was an oceanic bathymetric high. The intercalation of both tuffaceous materials and pelagic chert with the pillow basalts are consistent with a marginal basin tectonic setting.en_HK
dc.languageengen_US
dc.publisherHan Rim Won Publishing Company. The Journal's web site is located at http://gj.gskorea.or.kren_HK
dc.relation.ispartofGeosciences Journalen_HK
dc.subjectForearcen_HK
dc.subjectGeochemistryen_HK
dc.subjectOphioliteen_HK
dc.subjectPhilippinesen_HK
dc.subjectSuprasubductionen_HK
dc.titleVolcanic-hypabyssal rock geochemistry of a subduction-related marginal basin ophiolite: Southeast Bohol Ophiolite-Cansiwang Mélange Complex, Central Philippinesen_HK
dc.typeArticleen_HK
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hken_HK
dc.identifier.emailAitchison, JC: jona@hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.identifier.authorityAitchison, JC=rp00658en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1007/BF02910371en_HK
dc.identifier.scopuseid_2-s2.0-33749489576en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33749489576&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume10en_HK
dc.identifier.issue3en_HK
dc.identifier.spage291en_HK
dc.identifier.epage303en_HK
dc.identifier.isiWOS:000240955300010-
dc.publisher.placeKorea, Republic ofen_HK
dc.identifier.scopusauthoridFaustino, DV=6508199541en_HK
dc.identifier.scopusauthoridYumul Jr, GP=7003858862en_HK
dc.identifier.scopusauthoridDimalanta, CB=6602158221en_HK
dc.identifier.scopusauthoridDe Jesus, JV=7004066968en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridAitchison, JC=7102533858en_HK
dc.identifier.scopusauthoridTamayo Jr, RA=6701447282en_HK

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