Petrogenesis of Kejie Granite in the Northern Changning-Menglian Zone, Western Yunnan: Constraints from Zircon U-Pb Geochronology, Geochemistry and Hf Isotope

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	Petrogenesis of Kejie Granite in the Northern Changning-Menglian Zone, Western Yunnan: Constraints from Zircon U-Pb Geochronology, Geochemistry and Hf Isotope
	Nie Fei 4; Dong Guochen 1; Mo Xuanxue 1; Wang Xia 2; Fan Wenyu ; Dong Meiling 1; Zhu Huaping
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2014
卷号	88 期号:3 页码:754-765
关键词	Zircon U-Pb dating and Hf isotope geochemistry highly fractionated I-type granite Kejie pluton neo-Tethys ocean
ISSN号	1000-9515
英文摘要	The Kejie pluton is located in the north of the Changning-Menglian suture zone. The rock types are mainly biotite-granite. Zircon LA-ICP-MS U-Pb dating indicates that the Kejie pluton emplaced at about 80-77 Ma, Late Cretaceous. The Kejie pluton samples are characterized by high SiO2 (71.68%-72.47%), K2O (4.73%-5.54%), total alkali (K2O + Na2O = 8.21%-8.53%), K2O/Na2O ratios (1.36-1.94) and low P2O5 (0.13%-0.17%), with A/CNK of 1.025-1.055; enriched in U, Th, and K, depleted in Ba, Nb, Sr, Ti, P and Eu. They are highly fractionated, slightly peraluminous I-type granite. The two samples of the Kejie pluton give a large variation of epsilon(Hf)(t) values (-5.04 to 1.96) and Hf isotope crustal model ages of 1.16-1.5 Ga. Zircon Hf isotopes and zircon saturation temperatures of whole-rock (801 degrees C-823 degrees C) show that the mantle-derived materials maybe have played a vital role in the generation of the Kejie pluton. The Kejie pluton was most likely generated in a setting associated with the eastward subduction of the neo-Tethys ocean, where intrusion of mantle wedge basaltic magmas in the crust caused the anatexis of the latter, forming hybrid melts, which subsequently experienced high-degree fractional crystallization.
学科主题	火成岩岩石学
WOS关键词	A-TYPE GRANITES ; I-TYPE GRANITES ; TECTONIC IMPLICATIONS ; LU-HF ; CRUSTAL EVOLUTION ; TENGCHONG BLOCK ; SOUTH CHINA ; SE CHINA ; ROCKS ; TIBET
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000339705700006
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40355]
专题	中国地质调查局成都地质调查中心
作者单位	1.Chengdu Inst Geol & Mineral Resource, Chengdu 610081, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 3.Earthquake Adm Shanxi Provence, Taiyuan 030021, Peoples R China 4.中国地质调查局成都地质调查中心
推荐引用方式 GB/T 7714	Nie Fei,Dong Guochen,Mo Xuanxue,et al. Petrogenesis of Kejie Granite in the Northern Changning-Menglian Zone, Western Yunnan: Constraints from Zircon U-Pb Geochronology, Geochemistry and Hf Isotope[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2014,88(3):754-765.
APA	Nie Fei.,Dong Guochen.,Mo Xuanxue.,Wang Xia.,Fan Wenyu.,...&Zhu Huaping.(2014).Petrogenesis of Kejie Granite in the Northern Changning-Menglian Zone, Western Yunnan: Constraints from Zircon U-Pb Geochronology, Geochemistry and Hf Isotope.ACTA GEOLOGICA SINICA-ENGLISH EDITION,88(3),754-765.
MLA	Nie Fei,et al."Petrogenesis of Kejie Granite in the Northern Changning-Menglian Zone, Western Yunnan: Constraints from Zircon U-Pb Geochronology, Geochemistry and Hf Isotope".ACTA GEOLOGICA SINICA-ENGLISH EDITION 88.3(2014):754-765.