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Magma Chamber Process of Post-collisional Magmatism: Insight from Textural and Elemental Characteristics of Plagioclase from the Tatun Volcanic Group, Northern Taiwan Volcanic Zone

文献类型：期刊论文

作者Zhang Xa1; Guo Kun1,2; Zhang Yu1; Lai Zhiqing3,4; Jiang Shulong5; Jiang Wenpeng5; Li Jingbo5
刊名ACTA GEOLOGICA SINICA-ENGLISH EDITION
出版日期2022-10-01
卷号96期号:5页码:1587-1599
ISSN号1000-9515
关键词plagioclase textural and compositional features dynamics of magma system Tatun Volcanic Group
DOI10.1111/1755-6724.14810
通讯作者Guo Kun(kguo@qnlm.ac) ; Lai Zhiqing(laizhiqing@ouc.edu.cn)
英文摘要The Taiwan mountain belt, one of the youngest orogenies in the world, is caused by the collision of the Luzon arc with the Eurasian margin, which leads to post-collisional extension and magmatism in the Northern Taiwan Volcanic Zone (NTVZ). The magma chamber process in this region has not previously been elucidated in detail. In this paper, the textural and compositional features of plagioclase phenocrysts in basalt from the Tatun Volcanic Group (TTVG) were studied to restrict the dynamics of magma system. Results show that the magma melts in TTVG are mainly sourced from the underlying MORB-like mantle wedge but influenced by incorporation of subduction components, causing the elevated Sr/Y and Ba/Y ratios in magma melts. The subduction components are mainly transported in the form of sediment melt. The plagioclase phenocrysts in the TTVG volcanic rocks are generally coarsely core-sieved with a clear rim. The An contents in the rims of plagioclase are much lower than those of cores, and elevated FeO concentrations are detected in the plagioclase rims. We propose there exists a double-layer magma chamber in this region. The core of the plagioclase was crystalized in the deeper quiescent magma chamber (similar to 21 km), which was subsequently partially dissolved during the ascent of magma melt under H2O-undersaturated condition, forming the typical coarsely sieved texture and synneusis. When this crystal-rich melt migrates into the shallower chamber, water saturation is reached and more sodic plagioclase formed as the rim of phenocryst. Due to the considerably higher fO(2) in the shallow chamber than in the deeper one, and the distribution of Fe between plagioclase and melt positively correlates with fO(2), the FeO content in the plagioclase rim elevates in conjunction with increasing fO(2).
资助项目Shandong Provincial Natural Science Foundation, China[ZR2019BD010] ; National Natural Science Foundation of China[42276085] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2021KG01] ; Pilot National Laboratory for Marine Science and Technology (Qingdao)[JCZX202014] ; Key Laboratory Submarine Geoscience and Prospecting Techniques, Ministry of Education, Ocean university of China
WOS研究方向Geology
语种英语
出版者WILEY
WOS记录号WOS:000874957500009
源URL[http://ir.qdio.ac.cn/handle/337002/180434]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Guo Kun; Lai Zhiqing
作者单位1.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao 266237, Shandong, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China
3.Ocean Univ China, MOE, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Shandong, Peoples R China
4.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Shandong, Peoples R China
5.Shandong Prov Nucl Ind Geol Grp 248, Qingdao 266000, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Zhang Xa,Guo Kun,Zhang Yu,et al. Magma Chamber Process of Post-collisional Magmatism: Insight from Textural and Elemental Characteristics of Plagioclase from the Tatun Volcanic Group, Northern Taiwan Volcanic Zone[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2022,96(5):1587-1599.
APA Zhang Xa.,Guo Kun.,Zhang Yu.,Lai Zhiqing.,Jiang Shulong.,...&Li Jingbo.(2022).Magma Chamber Process of Post-collisional Magmatism: Insight from Textural and Elemental Characteristics of Plagioclase from the Tatun Volcanic Group, Northern Taiwan Volcanic Zone.ACTA GEOLOGICA SINICA-ENGLISH EDITION,96(5),1587-1599.
MLA Zhang Xa,et al."Magma Chamber Process of Post-collisional Magmatism: Insight from Textural and Elemental Characteristics of Plagioclase from the Tatun Volcanic Group, Northern Taiwan Volcanic Zone".ACTA GEOLOGICA SINICA-ENGLISH EDITION 96.5(2022):1587-1599.

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来源：海洋研究所

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