Provenance of colorless and brown volcanic glass in late Pleistocene tephra layers in the Western Philippine Sea

作     者：Fuqing JIANG Zhishun ZHANG Zhaohui ZHANG Guoliang ZHANG Peng HUANG Xiaojing ZHOU Zhifang XIONG Congying LI Tiegang LI Fuqing JIANG;Zhishun ZHANG;Zhaohui ZHANG;Guoliang ZHANG;Peng HUANG;Xiaojing ZHOU;Zhifang XIONG;Congying LI;Tiegang LI

作者机构：Key Laboratory of Ocean Observation and Forecasting and Key Laboratory of Marine Geology and EnvironmentInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine GeologyQingdao Marine Science and Technology CenterQingdao 266237China University of Chinese Academy of SciencesBeijing 100049China Institute of Marine Chemistry and EnvironmentOcean CollegeZhejiang UniversityZhoushan 316021China College of Marine Technology and EnvironmentDalian Ocean UniversityDalian 116023China Key Laboratory of Marine Sedimentology and Environmental GeologyFirst Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2024年第42卷第5期

页      面：1438-1449页

核心收录：

学科分类：070905[理学-第四纪地质学] 070704[理学-海洋地质] 0709[理学-地质学] 07[理学] 0707[理学-海洋科学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.42076049,42376050) the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB42000000) the Laoshan Laboratory(No.LSKJ202204201) 

主　　题：volcanic glass provenance chemical composition Philippine Sea late Pleistocene 

摘      要：Tephra layers in the western Philippine Sea,characterized by abundant volcanic glass shards,may provide crucial evidence on the eruption history of volcanoes and tectonic evolution of the western Pacific.A 220-ka sediment core from the Benham Rise in the western Philippine Sea offers new insights into the provenance of four intercalated tephra layers(T1–T4,in chronological order)containing either colorless or brown glass *** to primitive mantle,all glass shards are enriched in large-ion lithophile elements,such as Rb,Cs,and Pb,and depleted in high field-strength elements,such as Th,Nb,and Ta,indicating a subduction-related *** colorless glass shards are characterized by high SiO_(2)(78%)and light rare earth element(LREE)contents as well as high La/Sm ratios(9),low FeO and MgO contents(100),pointing to a rhyolitic composition and a medium-K calc-alkaline serial *** contrast,the brown glass shards are characterized by lower SiO_(2)(63%)and LREE contents,higher FeO,MgO,and CaO contents,lower La/Sm(6)and Ba/Th(75),and similar Sr/Y ratios(15),indicating derivation from medium to high-K calc-alkaline andesite *** glass shards from layers T3(152 ka)and T4(172 ka)were correlated with volcanic deposits from the Taal and Laguna Caldera in the Maccolod Corridor,respectively,while the colorless glass shards from layers T1(36.5 ka)and T2(61.2 ka)were likely sourced from the Irosin Caldera in the Bicol *** the provenance of late Pleistocene tephra layers in the western Philippine Sea is helpful to complement a Philippine volcanic history and establish a regional tephrochronostratigraphy.