Petrogenesis and geological implications of Phanerozoic granitoids at northern Korean Peninsula

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Petrogenesis and geological implications of Phanerozoic granitoids at northern Korean Peninsula
	Zhang YanBin 1; Wu FuYuan 1; Yang JongHyok 2; Kim JongNam 2; Han RyongHyon 2
刊名	ACTA PETROLOGICA SINICA
	2016
卷号	32 期号:10 页码:3098-3122
关键词	Northern Korean Peninsula Phanerozoic granitoids Zircon U-Pb Hf-O isotope
文献子类	Article
英文摘要	The Tumangang belt and Kwanmo massif, located in northern part of the Korean Peninsula, are characterized by large volumes of granitoids and traditionally regarded as of Late Permian and Early Triassic ages. We obtained zircon SIMS U-Pb isotopic data of 16 samples from six representative granitic intrusions to determine their intrusive ages. New zircon U-Pb ages indicate that the granites in this area can be subdivided into three episodes: Late Permian (265 similar to 263Ma), Early Triassic (248 similar to 240Ma) and Jurassic (199 similar to 173Ma). Mineralogical and geochemical features suggest that all granites are I-and high fractionated I-types and most rocks belong to high calc-alkaline. Zircons from Jurassic granites in the Tumangang Belt and Kwanmo Massif, Late Permian gneissic granites in the Kwanmo Massif, are characterized by positive epsilon(Hf) (t) values (4.7 similar to 13.5), fairly young t(DM2) (Hf) (367 similar to 784Ma) and uniform 0 isotopic composition (delta(18)0 : 5.7% similar to 7.4%c). Such Hf-O isotopic characteristics of these granitoids are likely indicative of a high proportion of juvenile material in their petrogenesis. The highest epsilon(Hf) (t) value (13.5) need a source of juvenile underplated basalt derived from depleted asthenospheric mantle. Zircons from Late Permian and Early Triassic granites in Kwanmo Massif normally have lower epsilon(Hf) (t) values (-10.9 similar to 3. 8), older t(DM2) (Hf) (889 similar to 1651 Ma) and large variation of 0 isotopic composition (delta(18)0 : 5.6% similar to 9.2%c), indicating that they were derived from anataxis of old crustal basement materials. Regional comparison shows that the Tumangang belt and Kwanmo massif have the same geological evolution history. The granites of these areas have a great similarity with the granites in Jihei orogenic belt in the geochronological framework, petrological and geochemical characteristics, genetic type and magma source region, which indicate that the Tumangang belt and Kwanmo massif belong to the Cental Asian Orogenic Belt. Our studies suggested that Late Permian and Early Triassic granitoids belong to syn-collisional granites in northern margin of the North China Craton, which were most likely related to subduction of the Paleo-Asian Oceanic Plate beneath the North China Craton. In the Jurassic, Northeast China and Korea Peninsula transfer to Round Pacific Ocean tectonic field. With the effect of subduction of the Pacific Ocean Plate, a large area of Jurassic granites were developed.
WOS关键词	U-PB ZIRCON ; HF ISOTOPIC CONSTRAINTS ; MONGOL-OKHOTSK OCEAN ; CHINA CRATON ; TECTONIC IMPLICATIONS ; NE CHINA ; NORTHEASTERN CHINA ; JURASSIC GRANITES ; JILIN PROVINCE ; JIAMUSI MASSIF
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000388277000013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53243]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.State Acad Sci, Inst Geol, Pyongyang 3812100, Dem Rep Korea
推荐引用方式 GB/T 7714	Zhang YanBin,Wu FuYuan,Yang JongHyok,et al. Petrogenesis and geological implications of Phanerozoic granitoids at northern Korean Peninsula[J]. ACTA PETROLOGICA SINICA,2016,32(10):3098-3122.
APA	Zhang YanBin,Wu FuYuan,Yang JongHyok,Kim JongNam,&Han RyongHyon.(2016).Petrogenesis and geological implications of Phanerozoic granitoids at northern Korean Peninsula.ACTA PETROLOGICA SINICA,32(10),3098-3122.
MLA	Zhang YanBin,et al."Petrogenesis and geological implications of Phanerozoic granitoids at northern Korean Peninsula".ACTA PETROLOGICA SINICA 32.10(2016):3098-3122.