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Ar-40/Ar-39 age of the onset of high-Ti phase of the Emeishan volcanism strengthens the link with the end-Guadalupian mass extinction
Li, Youjuan1; He, Huaiyu2,5; Ivanov, Alexei V.3; Demonterova, Elena I.3; Pan, Yongxin2,5; Deng, Chenglong4,5; Zheng, Dewen1; Zhu, Rixiang4,5
2018-11-18
发表期刊INTERNATIONAL GEOLOGY REVIEW
ISSN0020-6814
卷号60期号:15页码:1906-1917
摘要Precise time constraints of the main extrusive phase of the Emeishan large igneous province (ELIP) remain unresolved because basalts commonly do not contain suitable minerals for U-Pb dating, whereas previous Ar-40/Ar-39 studies on basalts yielded tectonothermal overprint ages. The timing for the ELIP was deduced from indirect dating of minor intrusions of ultramafic/mafic and felsic compositions by geochronological methods and geological correlations. The extrusive part of the ELIP consists of an older low-Ti and younger high-Ti basalt phases. We have found fresh samples of plagioclase-phyric rocks at the lower Qiaojia extrusive section (the Yunnan province of China), which belong to the ELIP unit of the high-Ti basalt series. Ar-40/Ar-39 dating on plagioclase from two samples conducted at two different laboratories using different age standards yielded statistically indistinguishable results with the weighted mean age of 260.1 +/- 1.2 Ma for five individual measurements. This provides the direct constraints on the onset of the ELIP high-Ti basalt extrusive phase. The obtained age is within the error or slightly older than the age of the Guadalupian-Lopingian boundary and felsic ignimbrite capping the ELIP lava succession (both dated at 259.1 +/- 0.5 Ma). Our new data are strengthening the short duration of the, at least, high-Ti phase of the ELIP volcanism and its temporal link with the end-Guadalupian mass extinction. Estimation of the total duration of the ELIP volcanism awaits finding of suitable for dating low-Ti basalts.
关键词Emeishan large igneous province Qiaojia section plagioclase phenocrysts basalts Ar-40/Ar-39 dating end-Guadalupian mass extinction
DOI10.1080/00206814.2017.1405748
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research
关键词[WOS]LARGE IGNEOUS PROVINCE ; PERMIAN-TRIASSIC BOUNDARY ; ZIRCON U-PB ; CANYON SANIDINE STANDARD ; K-40 DECAY CONSTANTS ; SW CHINA ; FLOOD BASALTS ; MANTLE PLUME ; GEOCHEMICAL CONSTRAINTS ; CONTINENTAL BREAKUP
语种英语
资助项目National Natural Science Foundation of China[41425013] ; National Natural Science Foundation of China[41688103] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18030505] ; Russian Foundation for Basic Research[15-05-05130]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Russian Foundation for Basic Research ; Russian Foundation for Basic Research
WOS研究方向Geology
WOS类目Geology
WOS记录号WOS:000446413300006
出版者TAYLOR & FRANCIS INC
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89165
专题地球与行星物理院重点实验室
通讯作者He, Huaiyu; Ivanov, Alexei V.
作者单位1.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
3.Russian Acad Sci, Siberian Branch, Inst Earth Crust, 128 Lermontov St, Irkutsk 664033, Russia
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
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Li, Youjuan,He, Huaiyu,Ivanov, Alexei V.,et al. Ar-40/Ar-39 age of the onset of high-Ti phase of the Emeishan volcanism strengthens the link with the end-Guadalupian mass extinction[J]. INTERNATIONAL GEOLOGY REVIEW,2018,60(15):1906-1917.
APA Li, Youjuan.,He, Huaiyu.,Ivanov, Alexei V..,Demonterova, Elena I..,Pan, Yongxin.,...&Zhu, Rixiang.(2018).Ar-40/Ar-39 age of the onset of high-Ti phase of the Emeishan volcanism strengthens the link with the end-Guadalupian mass extinction.INTERNATIONAL GEOLOGY REVIEW,60(15),1906-1917.
MLA Li, Youjuan,et al."Ar-40/Ar-39 age of the onset of high-Ti phase of the Emeishan volcanism strengthens the link with the end-Guadalupian mass extinction".INTERNATIONAL GEOLOGY REVIEW 60.15(2018):1906-1917.
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