广西大宁岩体和初洞岩体锆石U-Pb年代学 及Hf同位素研究

doi:10.13209/j.0479-8023.2017.009

CORC > 北京大学 > 地球与空间科学学院

	广西大宁岩体和初洞岩体锆石U-Pb年代学及Hf同位素研究; Zircon Geochronology and Hf Isotopes of Daning and Chudong Intrusions, Guangxi Prvince
	郭丽爽 ; 吕鑫 ; 王政华 ; 毛佐国 ; 张继林 ; 刘玉琳 ; 陈旭
刊名	北京大学学报自然科学版
	2017
关键词	锆石U-Pb年代学 Hf同位素大宁岩体初洞岩体 zircon U-Pb dating Hf isotopes Daning pluton Chudong pluton
DOI	10.13209/j.0479-8023.2017.009
英文摘要	利用锆石LA-ICP-MS U-Pb定年,获得大宁岩体形成年龄为441.1±3.0 Ma,其包体年龄为439.5±3.6 Ma,初洞岩体形成年龄为423.5～434.2 Ma.结果表明,大宁岩体及其包体几乎同期形成,而初洞岩体是后期的侵入体.Lu-Hf同位素研究结果表明,大宁岩体及其暗色包体与初洞岩体具有相似的Hf同位素组成,在εHf(t)-年龄图上落在1440～1960 Ma的老地壳区间,表明三者的岩浆源区均是早元古代到中元古代地壳,暗色包体是岩浆早期分离结晶的产物,而初洞岩体是岩浆结晶分异晚期的产物.; LA-ICP-MS zircon U-Pb dating for Daning pluton, dark inclusions and Chudong pluton yield the weighted mean206Pb/238Pb ages of 441.1±3.0 Ma, 439.5±3.6 Ma and 423.5-434.2 Ma, respectively, revealing that Daning pluton and the dark inclusions were formed almost concurrently, while the Daning pluton was intruded by the Chudong pluton. In-situ zircon Lu-Hf isotopic analyses of Daning pluton, dark inclusions and Chudong pluton show same characteristics with negativeεHf(t) values, plotted within the revolution areas of the 1440-1960 Ma old continental crust in the age vs.εHf(t) diagrams. The Hf isotopic characteristics indicate that the magmas could be derived from the partial melting of Early Proterozoic to Mesoproterozoic crust materials. The dark inclusions were produced by the fractional crystallization of parental magma. The Chudong pluton was the advanced stage product of the magma crystallization differentiation.; 中国黄金集团勘查项目; 4; 667-682; 53
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/465460]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	郭丽爽,吕鑫,王政华,等. 广西大宁岩体和初洞岩体锆石U-Pb年代学及Hf同位素研究, Zircon Geochronology and Hf Isotopes of Daning and Chudong Intrusions, Guangxi Prvince[J]. 北京大学学报自然科学版,2017.
APA	郭丽爽.,吕鑫.,王政华.,毛佐国.,张继林.,...&陈旭.(2017).广西大宁岩体和初洞岩体锆石U-Pb年代学及Hf同位素研究.北京大学学报自然科学版.
MLA	郭丽爽,et al."广西大宁岩体和初洞岩体锆石U-Pb年代学及Hf同位素研究".北京大学学报自然科学版 (2017).