Petrogenesis and evolution of late Mesozoic granitic magmatism in the;Hohhot metamorphic core complex, Daqing Shan, North China

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	Petrogenesis and evolution of late Mesozoic granitic magmatism in the;Hohhot metamorphic core complex, Daqing Shan, North China
	Guo, Lei 6; Wang, Tao ; Castro, Antonio ; Zhang, Jinjiang ; Liu, Jiang ; Li, Jianbo
刊名	INTERNATIONAL GEOLOGY REVIEW
	2012
卷号	54 期号:16 页码:1885-1905
关键词	late Mesozoic contraction late Mesozoic extension granitic magmatism deep-crust partial fusion shallow-crust partial fusion granitoid geochemistry Sr-Nd-Hf isotopes
ISSN号	019AG
英文摘要	Late Mesozoic granitoid plutons of four distinct ages intrude the lower plate of the Hohhot metamorphic core complex along the northern margin of the North China craton. The plutons belong to two main groups: (1) Group I, deformed granitoids (148 and 140 Ma subgroups) with high Sr, LREE, and Na2O, low Y and Yb contents, high Sr/Y and La/Yb ratios, weak or no Eu anomalies, low Rb/Ba ratios, similar initial Sr-87/Sr-86 values (0.7064-0.7071) and low Mg-# (<37 mostly, 100 x molar MgO/MgO + FeOt); (2) Group II, non-deformed granitoids (132 and 114 Ma subgroups) with low Sr, relatively low Na2O, high Y and Yb contents, pronounced negative Eu anomalies, high Rb/Ba ratios, and initial Sr-87/Sr-86 values (0.7098-0.7161). The two groups share geochemical similarities in epsilon(Nd)(t) (-11.3 to -15.4) and T-DM2 ages (1.85-2.18 thousand million years) as well as Hf isotopic ratios in zircons. Geochemical modelling (using the MELTS code) suggests that similar sources but different depths of magma generation produced the early, high-pressure low-Mg adakitic granitoids and late, low-pressure granitoids with A-type characteristics. The early granitoids likely represent a partially melted, deep-seated, thickened lower continental crust that involved a minor contribution from young materials, whereas the later group partially melted at shallower depths. This granitic magmatic evolution coincided with the tectonic transition from crustal contraction to extension.
学科主题	火成岩岩石学
WOS关键词	THICKENED CONTINENTAL-CRUST ; EARLY CRETACEOUS GRANITOIDS ; PB ZIRCON ; GEOCHRONOLOGY ; CU-AU MINERALIZATION ; U-PB ; INNER-MONGOLIA ; EASTERN ; CHINA ; DABIE OROGEN ; EXTENSIONAL TECTONICS ; TRACE-ELEMENT
WOS研究方向	Geology
语种	英语
出版者	The authors thank Drs Ying Tong, Lei Zhang, and Bo Zhang for their;fruitful discussion and research cooperation. They are grateful to;Professor Hegner for the isotopic composition analytical work, and for;the geochemical data analytical work of Acme Analytical Laboratories;Ltd. (Vancouver, BC, Canada), and for the Hf isotopic data analytical;work of the Institute of Mineral Resources, Chinese Academy of;Geological Sciences. The work was supported by the National Natural;Science Foundation of China (NSFC grants 41002073, 90714006, and;91114206), the Basic Research Fund of the Institute of Geology, Chinese;Academy of Geological Sciences (project No. J0913), SinoProbe-08-01-03;and the China Geological Survey Project (1212011085474, 1212011120135,;and 1212010811033).
WOS记录号	WOS:000309708700003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39852]
专题	中国地质调查局西安地质调查中心
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 2.Chinese Acad Geol Sci, Key Lab Earthprobe & Geodynam, Beijing 100037, Peoples R China. 3.Univ Huelva, Dept Geol, Huelva 21071, Spain. 4.Peking Univ, Sch Earth & Space Sci, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China. 5.E China Inst Technol, Fuzhou 344000, Jiangxi, Peoples R China. 6.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Guo, Lei,Wang, Tao,Castro, Antonio,et al. Petrogenesis and evolution of late Mesozoic granitic magmatism in the;Hohhot metamorphic core complex, Daqing Shan, North China[J]. INTERNATIONAL GEOLOGY REVIEW,2012,54(16):1885-1905.
APA	Guo, Lei,Wang, Tao,Castro, Antonio,Zhang, Jinjiang,Liu, Jiang,&Li, Jianbo.(2012).Petrogenesis and evolution of late Mesozoic granitic magmatism in the;Hohhot metamorphic core complex, Daqing Shan, North China.INTERNATIONAL GEOLOGY REVIEW,54(16),1885-1905.
MLA	Guo, Lei,et al."Petrogenesis and evolution of late Mesozoic granitic magmatism in the;Hohhot metamorphic core complex, Daqing Shan, North China".INTERNATIONAL GEOLOGY REVIEW 54.16(2012):1885-1905.