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Zircon U-Pb dating, geochemistry and geological significance of the I type granites in Helong area, the eastern section of the southern margin of Xing-Meng Orogenic Belt.
Alternative TitleZircon U-Pb dating,geochemistry and geological significance of the I-type granites in Helong area,the eastern section of the southern margin of Xing-Meng Orogenic Belt
Guan QingBin1; Li ShiChao1; Zhang Chao2; Shi Yi3; Li PengChuan1
2016
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume32Issue:9Pages:2690-2706
AbstractPetrography, geochemical data, LA-ICP-MS zircon U-Pb dating and Sr-Nd isotopic have been obtained from Bajiazi pluton and Yongxin pluton in Helong area, with the aim of constraining the tectonic nature of the eastern section of the southern margin of Xing-Meng Orogenic Belt. LA-ICP-MS zircon U-Pb age data indicate that the quartz diorites from Bajiazi pluton formed during the early period of Late Permian and monzogranites from Yongxin pluton formed during Middle Triassic. Furthermore, Bajiazi quartz diorites belong to calc-alkaline, metaluminous I-type granitoids with feature of Na2O content is higher than K2O. They also show strong enrichment in LREEs and LILEs (Cs, Ba, K and Sr), depletions in HREEs and HFSEs (Nb, Ta and P). Combined the Sr-Nd isotopic data indicate the primary magma for Bajiazi pluton could be mainly derived from partical melting of the mafic lower crust under the tectonic setting of subduction. The Yongxin monzogranites belong to high-K calc-alkaline, metaluminous-weakly peraluminous I type granitoids with features of rich in SiO2, Al2O, and K2O. They also show strong enrichment in LREEs and LILEs (Cs, K and Sr), depletions in HREEs and HFSEs (Nb, Ta, Ti and P). Combined the Sr-Nd isotopic data indicate the primary magma for Bajiazi pluton could be mainly derived from partical melting of the mafic lower crust under the tectonic setting of syn-collision. The emplacement timing of Bajiazi pluton and Yongxin pluton reflect the Paleo-Asian oceanic plate had been subducting beneath the eastern section of the northern margin of the North China Plate during the early period of Late Permian, and the collision between North China Plate and Khanka Massif took place at the Middle Triassic, which suggests that the Paleo-Asian Ocean closed is between the end of Late Permian and Early Triassic.
KeywordPERMIAN TECTONIC EVOLUTION ND-HF ISOTOPES VOLCANIC-ROCKS NORTH CHINA JILIN PROVINCE CALC-ALKALINE NE CHINA GEOCHRONOLOGY PETROGENESIS CONSTRAINTS Southern margin of Xing-Meng Orogenic Belt I-type granites Zircon U-Pb dating Geochemistry The Paleo-Asian Ocean
Indexed ByCSCD
Language英语
CSCD IDCSCD:5789773
Citation statistics
Cited Times:7[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/142174
Collection中国科学院金属研究所
Affiliation1.吉林大学
2.山东大学
3.中国科学院金属研究所
Recommended Citation
GB/T 7714
Guan QingBin,Li ShiChao,Zhang Chao,et al. Zircon U-Pb dating, geochemistry and geological significance of the I type granites in Helong area, the eastern section of the southern margin of Xing-Meng Orogenic Belt.[J]. ACTA PETROLOGICA SINICA,2016,32(9):2690-2706.
APA Guan QingBin,Li ShiChao,Zhang Chao,Shi Yi,&Li PengChuan.(2016).Zircon U-Pb dating, geochemistry and geological significance of the I type granites in Helong area, the eastern section of the southern margin of Xing-Meng Orogenic Belt..ACTA PETROLOGICA SINICA,32(9),2690-2706.
MLA Guan QingBin,et al."Zircon U-Pb dating, geochemistry and geological significance of the I type granites in Helong area, the eastern section of the southern margin of Xing-Meng Orogenic Belt.".ACTA PETROLOGICA SINICA 32.9(2016):2690-2706.
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