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Characterization of the proto-Philippine Sea Plate:Evidence from the emplaced oceanic lithospheric fragments along eastern Philippines 被引量:2
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作者 Carla B.Dimalanta Decibel V.Faustino-Eslava +6 位作者 Jillian Aira S.Gabo-Ratio Edanjarlo J.Marquez Jenielyn T.Padrones Betchaida D.Payot Karlo L.Queano Noelynna T.Ramos Graciano P.Yumul Jr. 《Geoscience Frontiers》 SCIE CAS CSCD 2020年第1期3-21,共19页
The proto-Philippine Sea Plate(pPSP)has been proposed by several authors to account for the origin of the Mesozoic supra-subduction ophiolites along the Philippine archipelago.In this paper,a comprehensive review of t... The proto-Philippine Sea Plate(pPSP)has been proposed by several authors to account for the origin of the Mesozoic supra-subduction ophiolites along the Philippine archipelago.In this paper,a comprehensive review of the ophiolites in the eastern portion of the Philippines is undertaken.Available data on the geology,ages and geochemical signatures of the oceanic lithospheric fragments in Luzon(Isabela,Lagonoy in Camarines Norte,and Rapu-Rapu island),Central Philippines(Samar,Tacloban,Malitbog and Southeast Bohol),and eastern Mindanao(Dinagat and Pujada)are presented.Characteristics of the Halmahera Ophiolite to the south of the Philippines are also reviewed for comparison.Nearly all of the crust-mantle sequences preserved along the eastern Philippines share Early to Late Cretaceous ages.The geochemical signatures of mantle and crustal sections reflect both mid-oceanic ridge and suprasubduction signatures.Although paleomagnetic information is currently limited to the Samar Ophiolite,results indicate a near-equatorial Mesozoic supra-subduction zone origin.In general,correlation of the crust-mantle sequences along the eastern edge of the Philippines reveal that they likely are fragments of the Mesozoic pPSP. 展开更多
关键词 eastern philippines OPHIOLITES Proto-philippine Sea Plate
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Geochemical character and material source of sediments in the eastern Philippine Sea 被引量:14
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作者 XU ZhaoKai LI AnChun +1 位作者 JlANG FuQing XU FangJian 《Chinese Science Bulletin》 SCIE EI CAS 2008年第6期923-931,共9页
Based upon analyses of grain-size, rare earth element (REE) compositions, elemental occurrence phases of REE, and U-series isotopic dating, the sediment characteristics and material sources of the study area were exam... Based upon analyses of grain-size, rare earth element (REE) compositions, elemental occurrence phases of REE, and U-series isotopic dating, the sediment characteristics and material sources of the study area were examined for the recently formed deep-sea clays in the eastern Philippine Sea. The analytical results are summarized as follows. (1) Low accumulation rate, poor sorting and roundness, and high contents of grains coarser than fine silt indicate relatively low sediment input, with localized material source without long distance transport. (2) The REE Contents are relatively high. Shale-normalized patterns of REE indicate weak enrichment in heavy REE (HREE), Ce-passive anomaly, and Eu-positive anomaly. (3) Elemental occurrence phases of REE between the sediments with and without crust are similar. REE mainly concentrate in residual phase and then in ferromanganese oxide phase. The light REE (LREE) enrichment, Ce-positive anomaly, and Eu-positive anomaly occur in re- sidual phase. Ferromanganese oxide phase shows the characteristics of relatively high HREE content and Ce-passive anomaly. (4) There are differences in each above mentioned aspect between the sedi- ments with and without ferromanganese crust. (5) Synthesizing the above characteristics and source discriminant analysis, the study sediments are deduced to mainly result from the alteration of local and nearby volcanic materials. Continental materials transported by wind and/or river (ocean) flows also have minor contributions. 展开更多
关键词 菲律宾海 沉淀物 稀土元素 判别函数
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东菲律宾海深水铁锰结壳发育站位沉积物的粒度及黏土矿物学特征 被引量:6
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作者 徐兆凯 李安春 +1 位作者 蒋富清 刘建国 《海洋学报》 CAS CSCD 北大核心 2007年第2期150-155,共6页
关键词 粒度特征 黏土矿物学特征 东菲律宾海 沉积物 铁锰结壳
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