Eruption of the continental flood basalts at similar to 259 Ma in the;Emeishan large igneous province, SW China: Evidence from laser;microprobe Ar-40/Ar-39 dating

	Eruption of the continental flood basalts at similar to 259 Ma in the;Emeishan large igneous province, SW China: Evidence from laser;microprobe Ar-40/Ar-39 dating
	Hou Zengqian 3; Chen Wen ; Lu Jiren
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2006
卷号	80 期号:4 页码:514-521
关键词	laser microprobe Ar-40/Ar-39 age continental flood basalts Emeishan large igneous province
ISSN号	1000-9515
英文摘要	A suite of continental flood basalts sampled over a vast exposure and stratigraphic thickness in the Emeishan large igneous province (LIP), SW China was investigated for laser microprobe Ar-40/Ar-39 dating. There are two Ar-40/Ar-39 age groups for these basalts, corresponding to 259-246 Ma and 177-137 Ma, respectively. A well-defined isochron gives an eruption age of huge quantities of maric magmas at 258.9 +/- 3.4 Ma, which is identical to previous dating and paleontological data. Much younger Ar-40/Ar-39 ages for some basalts with low-greenschist metamorphic facies probably recorded a late thermo-tectonic event caused by collision between the Yangtze and Qiangtang continental blocks during the Mesozoic, which resulted in the reset of argon isotope system. The 40Ar/39Ar age data, we present here, combined with previous dating and paleontological data, suggest relatively short duration (about 3 Ma) of mafic volcanism, which have important implication on mantle plume genesis of the Emeishan continental flood basalts in the LIP.
学科主题	地质年代学
WOS关键词	PERMIAN-TRIASSIC BOUNDARY ; MANTLE PLUMES ; AGE ; EVOLUTION ; GEOCHEMISTRY ; CONSTRAINTS ; EXTINCTION ; GENERATION ; MAGMATISM ; RIFT
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000240249700007
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38261]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Med Sci, Inst Geol, Beijing 100037, Peoples R China. 2.Chinese Acad Med Sci, Inst Mineral Resources, Beijing 100037, Peoples R China. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Hou Zengqian,Chen Wen,Lu Jiren. Eruption of the continental flood basalts at similar to 259 Ma in the;Emeishan large igneous province, SW China: Evidence from laser;microprobe Ar-40/Ar-39 dating[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2006,80(4):514-521.
APA	Hou Zengqian,Chen Wen,&Lu Jiren.(2006).Eruption of the continental flood basalts at similar to 259 Ma in the;Emeishan large igneous province, SW China: Evidence from laser;microprobe Ar-40/Ar-39 dating.ACTA GEOLOGICA SINICA-ENGLISH EDITION,80(4),514-521.
MLA	Hou Zengqian,et al."Eruption of the continental flood basalts at similar to 259 Ma in the;Emeishan large igneous province, SW China: Evidence from laser;microprobe Ar-40/Ar-39 dating".ACTA GEOLOGICA SINICA-ENGLISH EDITION 80.4(2006):514-521.