Geochemical characteristics, zircons U-Pb ages and Lu-Hf isotopic composition of the Yanshanian intermediate-acidic plutons in the Shanyang-Zhashui areas, Qinling Orogenic Belt

	Geochemical characteristics, zircons U-Pb ages and Lu-Hf isotopic composition of the Yanshanian intermediate-acidic plutons in the Shanyang-Zhashui areas, Qinling Orogenic Belt
	Wu FaFu 1; Wang ZongQi ; Yan Zhen 2; Chen Lei ; Xia ChangLing 3; Guo YanHui 3; Peng YuanMin 3
刊名	ACTA PETROLOGICA SINICA
	2014
卷号	30 期号:2 页码:451-471
关键词	Granite Zircons U-Pb ages Lu-Hf isotope Yanshanian Shanyang-Zhashui
ISSN号	1000-0569
英文摘要	A large number of Yanshanian intermediate-acidic granite (porphyry) are widely exposed in the Shanyang-Zhashui region, Qinling, and among of them are associated porphyry-skarn Cu-Mo-Fe and Cu-Au-Fe mineralization. LA-ICP-MS zircon U-Pb ages reveal porphyry bodies are formed in the 144.6 similar to 141.5Ma. Geochemical analysis results showing that intermediate-acidic granite (porphyry) have SiO2 = 55.73% similar to 67.80%, K2O = 2.52% similar to 6.40%, Na2O = 1.94% similar to 5.19%, Al2O3 = 14.61% similar to 16.10%, FeOT = 2.1% similar to 9.0% and MgO = 1.32% similar to 5.52%, proving that they belong to high-K calc-alkaline granites. A/CNK < 1.1, negative correlation between P2O5 and SiO2, Mg-# average values 49 and mineral ingredients (hornblende, biotite, sphenes and magnetite), all of these reveal the characteristics of I-type granites. REE fractionation obviously, no manifest Eu anomaly, enriched in large ion lithophile elements, such as K, Rb, Sr and Ba, and depleted in high field strength elements, e. g. Nb, Ta, Ti, P and Hf, show that they belong to post-collision granites. Zircon epsilon(Hf)(t) range from -4.5 to +1.78 (average -0.87), indicating that the magma may sourcing from subducted mafic crustal material mixing with mantle material, and crustal melting are main ingredients. Hf isotopes two-stage model ages (t(DM2)), 1479 similar to 1084Ma, indicated its crustal source is formed in Middle to Late Proterozoic (ca. 1.4 similar to 1.0Ga).
学科主题	火成岩岩石学
WOS关键词	NATURAL REFERENCE MATERIAL ; CENTRAL CHINA IMPLICATIONS ; SHAHEWAN-RAPAKIVI GRANITE ; IN-SITU ANALYSIS ; CONTINENTAL-CRUST ; GEOLOGICAL SIGNIFICANCE ; LASER-ABLATION ; ICP-MS ; CONSTRAINTS ; ROCKS
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000333224500011
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40401]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Resource, MRL Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Wuhan Ctr China Geol Survey, Wuhan 430205, Peoples R China 3.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 4.Northwest Min & Geol Explorat Bur Nonferrous Met, Geol Team 713, Shangluo 726000, Peoples R China
推荐引用方式 GB/T 7714	Wu FaFu,Wang ZongQi,Yan Zhen,et al. Geochemical characteristics, zircons U-Pb ages and Lu-Hf isotopic composition of the Yanshanian intermediate-acidic plutons in the Shanyang-Zhashui areas, Qinling Orogenic Belt[J]. ACTA PETROLOGICA SINICA,2014,30(2):451-471.
APA	Wu FaFu.,Wang ZongQi.,Yan Zhen.,Chen Lei.,Xia ChangLing.,...&Peng YuanMin.(2014).Geochemical characteristics, zircons U-Pb ages and Lu-Hf isotopic composition of the Yanshanian intermediate-acidic plutons in the Shanyang-Zhashui areas, Qinling Orogenic Belt.ACTA PETROLOGICA SINICA,30(2),451-471.
MLA	Wu FaFu,et al."Geochemical characteristics, zircons U-Pb ages and Lu-Hf isotopic composition of the Yanshanian intermediate-acidic plutons in the Shanyang-Zhashui areas, Qinling Orogenic Belt".ACTA PETROLOGICA SINICA 30.2(2014):451-471.