Magmatic pulses of the Tatun Volcano Group, northern Taiwan, revisited: Constraints from zircon U-Pb ages and Hf isotopes

doi:10.1016/j.jseaes.2018.05.028

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	Magmatic pulses of the Tatun Volcano Group, northern Taiwan, revisited: Constraints from zircon U-Pb ages and Hf isotopes
	Chu, Mei-Fei 1; Lai, Yu-Ming 2; Li, Qiuli 3; Chen, Wen-Shan 4; Song, Sheng-Rong 4; Lee, Hao-Yang 5; Lin, Te-Hsien 4
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2018-11-01
卷号	167 页码:209-217
关键词	Taiwan Tatunvolcano Zircon U-Pb geochronology Hf isotope
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2018.05.028
英文摘要	The initiation and duration of magmatism in the Tatun Volcano Group (TVG), likely resulting from extensional collapse of the northern Taiwan mountain belt, remains an important issue of debates in the Taiwan orogeny. Here we report a detailed study of U-Pb ages determined by SIMS and LA-ICPMS, together with Hf isotopic data, of zircon separates from a total of 22 extrusive rocks from the TVG lava flow and additional two andesites from Keelungyu (KLY), a volcanic islet off NE Taiwan. Magmatic zircons from the TVG are characterized by uniform and high Hf isotopic ratios, with epsilon(Hf)(T) mostly from +20 to +10. Their overall Pb-206/U-238 ages suggest that the TVG magmatism was initiated similar to 3 Ma but more active <= 0.8 Ma with a flare up <= 0.35 Ma. Magmatic zircons from the two KLY samples reveal identical Pb-206/U-238 ages (0.41 Ma), coupled with Hf isotopes [epsilon(Hf)(T): +25 to +9] comparable to those of the TVG. Thus, KLY is proposed as part of the TVG. Consequently, we argue that the main body of the TVG formed <= 0.8 Ma by post-collisional volcanism, but the mechanism resulting in the magmatic episodes >= 1.0 Ma remains obscure due to the scarcity of rock exposures.
WOS关键词	POSTCOLLISIONAL MAGMATISM ; GEOCHEMICAL CONSTRAINTS ; EVOLUTION ; GEOCHRONOLOGY ; PETROGENESIS ; GENERATION ; ANDESITE ; GENESIS ; ROCKS ; LEAD
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000451492800015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89632]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Chu, Mei-Fei
作者单位	1.Natl Taiwan Univ, Inst Oceanog, Taipei, Taiwan 2.Natl Taiwan Normal Univ, Dept Earth Sci, Taipei, Taiwan 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 4.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan 5.Acad Sinica, Inst Earth Sci, Taipei, Taiwan
推荐引用方式 GB/T 7714	Chu, Mei-Fei,Lai, Yu-Ming,Li, Qiuli,et al. Magmatic pulses of the Tatun Volcano Group, northern Taiwan, revisited: Constraints from zircon U-Pb ages and Hf isotopes[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,167:209-217.
APA	Chu, Mei-Fei.,Lai, Yu-Ming.,Li, Qiuli.,Chen, Wen-Shan.,Song, Sheng-Rong.,...&Lin, Te-Hsien.(2018).Magmatic pulses of the Tatun Volcano Group, northern Taiwan, revisited: Constraints from zircon U-Pb ages and Hf isotopes.JOURNAL OF ASIAN EARTH SCIENCES,167,209-217.
MLA	Chu, Mei-Fei,et al."Magmatic pulses of the Tatun Volcano Group, northern Taiwan, revisited: Constraints from zircon U-Pb ages and Hf isotopes".JOURNAL OF ASIAN EARTH SCIENCES 167(2018):209-217.