Geochemical constraints on CO2-rich mantle source for the Kocebu Seamount, Magellan Seamount chain in the western Pacific

doi:10.1007/s00343-020-0013-x

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	Geochemical constraints on CO2-rich mantle source for the Kocebu Seamount, Magellan Seamount chain in the western Pacific
	Liu Yuhao 1,2,4; Zhang Guoliang 1,2,3,5; Zhang Ji 1,2,4; Wang Shuai 1,2,4
刊名	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2020-07-01
卷号	38 期号:4 页码:1201-1214
关键词	alkaline oceanic island basalts (OIBs) carbonatite geochemistry mantle source Magellan Seamounts
ISSN号	2096-5508
DOI	10.1007/s00343-020-0013-x
通讯作者	Zhang Guoliang(zhangguoliang@qdio.ac.cn)
英文摘要	The alkaline oceanic island basalts (OIBs) with under-saturated SiO(2)and high contents of CaO and alkaline are usually attributed to mantle sources different from typical tholeiitic OIBs. Based on the results of high pressure and temperature experiment study, the genesis of silica under-saturated alkaline basaltic melts could be explained by the role of CO2, thus, the genetic relationship of alkaline basalts with CO(2)has become a topic of relevance because it is closely related to the deep carbon cycle. The Magellan Seamount chain in the West Pacific Seamount Province has wide distribution of alkali basalts. For the first time, we collected alkaline basalt samples from the Kocebu Seamount of the Magellan Seamount chain and found that magmatic apatites widely occur in the less evolved volcanic rock samples, and the high contents of phosphorus should be a feature of the alkaline OIBs of the Magellan Seamounts. Compared with typical OIBs, these alkaline volcanic rocks have higher CaO and P2O5, lower SiO(2)content, negative anomaly of high field strength elements (HFSEs), more distinctly negative anomaly of potassium (K) and the ubiquity of titanaugite, indicating a CO2-rich mantle source. Based on the relatively high K2O and TiO(2)contents and La/Yb ratio and low MgO content of these alkaline rocks, we suggest that the volcanic rocks of the Magellan Seamounts are originated from carbonated eclogites derived possibly from ancient subducted altered oceanic crust.
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000551529700018
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/168050]
专题	海洋研究所_海洋地质与环境重点实验室海洋研究所_深海极端环境与生命过程研究中心
通讯作者	Zhang Guoliang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266000, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Liu Yuhao,Zhang Guoliang,Zhang Ji,et al. Geochemical constraints on CO2-rich mantle source for the Kocebu Seamount, Magellan Seamount chain in the western Pacific[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2020,38(4):1201-1214.
APA	Liu Yuhao,Zhang Guoliang,Zhang Ji,&Wang Shuai.(2020).Geochemical constraints on CO2-rich mantle source for the Kocebu Seamount, Magellan Seamount chain in the western Pacific.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,38(4),1201-1214.
MLA	Liu Yuhao,et al."Geochemical constraints on CO2-rich mantle source for the Kocebu Seamount, Magellan Seamount chain in the western Pacific".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 38.4(2020):1201-1214.