Paleoproterozoic granitic magmatism and crustal evolution in the Tonghua region, northeast China.

	Paleoproterozoic granitic magmatism and crustal evolution in the Tonghua region, northeast China.
	Lu, XP ; Wu, FY ; Gho, JH ; Yin, CJ
刊名	ACTA PETROLOGICA SINICA
	2005-05-01
卷号	21 期号:3 页码:721-736
ISSN号	1000-0569
文献子类	Article
英文摘要	The Paleoproterozoic metamorphic complex, widespread in the Liaoning-Jilin Region of northeastern North China Craton, was thought to be the result of intra-plate rifting. However, our filed observations show that the magmatites are not metamorphic rocks but granitic plutons with different degree deformation and metamorphism, consisting of gneissic hornblende syenogranite (termed by "striated granite" or "Liaoji granite"), gneissic quartz diorites, porphyric biotite monzogranite, porphyric-rapakivi garnet granite and hornblende pyroxene syenite. This paper presents the new zircon SHRIMP U-Pb data of gneissic quartz diorite and porphyric-rapakivi garnet granite. The results show that they were emplaced during 1872 similar to 1850 Ma, similar to those of porphyric biotite monzogranite and hornblende pyroxene syenitic complex. Petrography and geochemical features indicate that the gneissic quartz diorite belong to I-type granites with geochemistry of Arc-type granitoids, whereas, porphyric-rapakivi garnet-bearing granites with rapakivi texture have geochemistry of S-type granites. With consideration of the P-T path of the regional metamorphism coeval with the emplacement of these granites, the concurrence of I-, S- and A-type granites indicates that these granites formed in the post-orogenic setting. The difference of the basement rocks between Langlin ( Korea) -Liaonan ( China) block and Longgang block indicates that the North China Craton is composed of Langlin-Liaonan-Jiaodong and Longgang-Luxi-Wuhuai blocks in the east and west block, not of West and East blocks. These two blocks in the east North China Craton assembled at about 1.9 Ga, and then collided with the West Block at about 1.85 Ga.
WOS关键词	PB ZIRCON AGES ; TECTONIC EVOLUTION ; LIAONING-PROVINCE ; U-PB ; CRATON ; GEOCHEMISTRY ; DEPOSITS ; COMPLEX ; ISSUES ; JILIN
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000231179000013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65662]
专题	中国科学院地质与地球物理研究所
通讯作者	Lu, XP
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Reg Geol & Mineral Resources Survey Jilin Provinc, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Lu, XP,Wu, FY,Gho, JH,et al. Paleoproterozoic granitic magmatism and crustal evolution in the Tonghua region, northeast China.[J]. ACTA PETROLOGICA SINICA,2005,21(3):721-736.
APA	Lu, XP,Wu, FY,Gho, JH,&Yin, CJ.(2005).Paleoproterozoic granitic magmatism and crustal evolution in the Tonghua region, northeast China..ACTA PETROLOGICA SINICA,21(3),721-736.
MLA	Lu, XP,et al."Paleoproterozoic granitic magmatism and crustal evolution in the Tonghua region, northeast China.".ACTA PETROLOGICA SINICA 21.3(2005):721-736.