Shuangjingzi middle Triassic syn-collisional crust-derived granite in the east Inner Mongolia and its constraint on the timing of collision between Siberian and Sino-Korean paleo-plates.

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	Shuangjingzi middle Triassic syn-collisional crust-derived granite in the east Inner Mongolia and its constraint on the timing of collision between Siberian and Sino-Korean paleo-plates.
	Li, JY (Li Jinyi); Gao, LM (Gao LiMing); Sun, GH (Sun GuiHua); Li, YP (Li YaPing); Wang, YB (Wang YanBin)
刊名	ACTA PETROLOGICA SINICA
	2007
卷号	23 期号:3 页码:565-582
关键词	East Inner Mongolia Xar Moron suture Shuangjingzi two-mica granite crust-drived Triassic
ISSN号	1000-0569
英文摘要	The Shuangjingzi granite intruded the Late Paleozoic accretion-collisional complex, which is exposed in the north of Xar Moron River, eastern Inner Mongolia. This pluton under-went the intensively ductile deformation during the Mesozoic, and is characterized by occurrence of muscovite in mineral assemblage, high SiO(2), Al(2)O(3) and alkaline content, low Na(2)O/K(2)O ratio (< 1), higher A/CNK (1.02 similar to 1.08) and A/NK (1.20 similar to 1.35) ratios, light REE enrichment with weak Eu anomalies, depleted Ti and Sc, especially depleted Nb and Ta but enriched Th, higher (143)Nd/(144)Nd (0.512229 similar to 0.512286) and ((143)Nd/(144)Nd), (0.512068 similar to 0.512199) ratios, lower epsilon(Nd)(t) (-2.71 similar to -5.28) values with younger Nd depleted mantle model ages (1000-130OMa), higher (87)Sr/(86)Sr (0.713516 similar to 0.722096) and ((17)Sr/(16)Sr), (0.705756 similar to 0.709187) ratios in petro-chemistry, indicating that this pluton is crust-derived, probably mainly come from the re-melting of Paleozoic accretion-collisional complexes and older continental margins. SHRIMP U-Pb dating of zircons from two samples of this granite yields apparent ages of 229.2 +/- 4.1 Ma and 237.2 +/- 2.7 Ma, indicating the occurrence of this pluton in the Middle Triassic. Available geological data make us get conclusions that the collision along the Xar Moron suture between Siberian and Sino-Korean paleo-plates began at middle Permian (about 270Ma), and ended in the middle Triassic, which led to uplifting of a huge EW-extended mountain from Beishan eastwards through southern Inner Mongolia to central Jilin during the early to middle Triassic, and that the Late Triassic magmatic activities in the area occurred in the extensional setting in the late stage of tectonic evolution of the mountain, implying the beginning of a new stage of the crustal evolution of the area.
学科主题	火成岩岩石学
WOS关键词	MEXICAN VOLCANIC BELT ; ISLAND BASALT-TYPE ; CHINA ; PETROGENESIS ; TECTONICS ; PROVINCE ; AREA ; MAGMATISM ; COMPLEX ; FAUNAS
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000246956900004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38517]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China Beijing SHRIMP Ctr, Beijing 100037, Peoples R China Zhongfei Geol Engn Explorat Acad, Beijing 100102, Peoples R China
推荐引用方式 GB/T 7714	Li, JY ,Gao, LM ,Sun, GH ,et al. Shuangjingzi middle Triassic syn-collisional crust-derived granite in the east Inner Mongolia and its constraint on the timing of collision between Siberian and Sino-Korean paleo-plates.[J]. ACTA PETROLOGICA SINICA,2007,23(3):565-582.
APA	Li, JY ,Gao, LM ,Sun, GH ,Li, YP ,&Wang, YB .(2007).Shuangjingzi middle Triassic syn-collisional crust-derived granite in the east Inner Mongolia and its constraint on the timing of collision between Siberian and Sino-Korean paleo-plates..ACTA PETROLOGICA SINICA,23(3),565-582.
MLA	Li, JY ,et al."Shuangjingzi middle Triassic syn-collisional crust-derived granite in the east Inner Mongolia and its constraint on the timing of collision between Siberian and Sino-Korean paleo-plates.".ACTA PETROLOGICA SINICA 23.3(2007):565-582.