Zircon SHRIMP geochronology and geochemistry of Late Permian high-Mg andesites in Seluohe area, Jilin province, China

	Zircon SHRIMP geochronology and geochemistry of Late Permian high-Mg andesites in Seluohe area, Jilin province, China
	Li ChengDong ; Zhang FuQin ; Miao LaiCheng ; Xie HangQiang ; Xu YaWen
刊名	ACTA PETROLOGICA SINICA
	2007-04-01
卷号	23 期号:4 页码:767-776
关键词	high-Mg andesite zircon SHRIMP geochronology geochemistry Seluohe Jilin
ISSN号	1000-0569
文献子类	Article
英文摘要	High-Mg andesites occur in Seluohe, Jilin, China, which are dated at 252 +/- 5Ma by the SHRIMP zircon U-Pb method, indicating that they were generated in the Late Permian. The high-Mg andesites (SiO(2) 59.08%similar to 65.67%) are geochemically characterized by high MgO (3.68%similar to 5.30%) and high Mg(#) (0.62 similar to 0.68, avg. 0.66) in association with enrichments of Cr (203.17x10(-6) similar to 379.70x10(-6) avg. 258.79x10(-6)) and Ni (98.13x10(-6)similar to 249.35x10(-6), avg. 137.00x10(-6)). These andesites are strongly enriched in light rare earth elements(Ce 39.14x10(-6)similar to 48.74x10(-6)) and large-ion-lithophile elements (such as Cs,K,Pb,Rb and Ra), and are also eharacterized by depletion of high-field-strength elements (such as Ta,Ti,Nb and P) and heavy rare earth elements (Yb 0.95x10(-6)similar to 1.27x10(-6), Y 10.80x10(-6)similar to 13.13x10(-6), (La/Yb)(N)13.27 similar to 16.66). In addition, the andesites have low Sr concentrations (158.62x10(-6)similar to 369.77x10(-6), avg. 258.52x10(-6)). Considering that the high-Mg andesites are a medium-K, calc-alkaline suite with assimilaton-fractional crystallization, it is suggested that Seluohe high-Mg andesites were most likely derived from the partial melting of enriched mantle wedge materials induced by hydrous fluid from subducted sediments in a subduction zone and then experienced assimilaton-fractional crystallization during ascending. It is thus concluded that Paleo-Asian ocean plate was presumably in the process of subduction during the late Permian, and the collision between North China and Jiamusi-Khanka plates might take place after the Permian.
WOS关键词	SETOUCHI VOLCANIC BELT ; HIGH-MAGNESIAN ANDESITES ; SHODO-SHIMA ISLAND ; U-PB AGES ; SOUTHWEST JAPAN ; SUBDUCTING SEDIMENTS ; NORTHEAST CHINA ; SW JAPAN ; EVOLUTION ; MANTLE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000246957000008
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/67342]
专题	中国科学院地质与地球物理研究所
通讯作者	Li ChengDong
作者单位	1.Tian Jin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li ChengDong,Zhang FuQin,Miao LaiCheng,et al. Zircon SHRIMP geochronology and geochemistry of Late Permian high-Mg andesites in Seluohe area, Jilin province, China[J]. ACTA PETROLOGICA SINICA,2007,23(4):767-776.
APA	Li ChengDong,Zhang FuQin,Miao LaiCheng,Xie HangQiang,&Xu YaWen.(2007).Zircon SHRIMP geochronology and geochemistry of Late Permian high-Mg andesites in Seluohe area, Jilin province, China.ACTA PETROLOGICA SINICA,23(4),767-776.
MLA	Li ChengDong,et al."Zircon SHRIMP geochronology and geochemistry of Late Permian high-Mg andesites in Seluohe area, Jilin province, China".ACTA PETROLOGICA SINICA 23.4(2007):767-776.