Is the Paleoproterozoic Jiao-Liao-Ji Belt (North China Craton) a rift?

doi:10.1007/s00531-016-1323-2

CORC > 北京大学 > 地球与空间科学学院

	Is the Paleoproterozoic Jiao-Liao-Ji Belt (North China Craton) a rift?
	Li, Zhuang ; Chen, Bin ; Wei, Chunjing
刊名	INTERNATIONAL JOURNAL OF EARTH SCIENCES
	2017
关键词	Paleoproterozoic Jiao-Liao-Ji Belt North China Craton Tectonic evolution ZIRCON U-PB ARCHEAN CRUSTAL EVOLUTION BORON ISOTOPE SYSTEMATICS SOUTHERN JILIN PROVINCE WHOLE-ROCK GEOCHEMISTRY TECTONIC IMPLICATIONS EASTERN BLOCK VOLCANIC-ROCKS BORATE DEPOSITS ANSHAN AREA
DOI	10.1007/s00531-016-1323-2
英文摘要	As a typical example of the Paleoproterozoic crust in the Eastern Block of the North China Craton, the Paleoproterozoic Jiao-Liao-Ji Belt consists principally of the Liaohe Group (and its equivalents), Liaoji granites and mafic intrusions. Previous studies indicate that the evolution of the Jiao-Liao-Ji Belt has been mainly attributed to the opening and closing of an intracontinental rift along the eastern continental margin of the North China Craton. Here we synthesize the Paleoproterozoic magmatism, sedimentation, metamorphism and metallogeny against the rift model and propose a process of arc-continent collision between the northern Longgang and the southern Nangrim Blocks. This conclusion is consistent with the observations, including that (a) the 2.0- to 2.2-Ga magmatism shows a typical subalkaline series, rather than a bimodal distribution, since the mafic rocks mostly have arc affinities and the acidic-intermediate rocks belong to the calc-alkaline series; (b) the main source of the 1.9- to 2.0-Ga sedimentary rocks is the Paleoproterozoic arc materials, indicating a fore-arc or back-arc basin setting; (c) a couple of big borate deposits occur in the boron-rich volcanic rocks that were formed in convergent continental margins; (d) the North and South Liaohe Groups show different rock associations and metamorphic histories (P-T paths); and (e) the Nangrim and Longgang Blocks vary in lithological units, geochronology and metamorphic features. Thus, an arc-continent collision tectonic scenario for the Paleoproterozoic Jiao-Liao-Ji Belt is involved: (a) a southward subduction in the period 2.0-2.2 Ga; (b) sedimentation during the period 1.9-2.0 Ga; (c) arc-continent collision at ca. 1.9 Ga; and (d) post-collisional extension at 1.82-1.87 Ga, marking the end of the Paleoproterozoic tectonothermal event.; National Key Basic Research Program of China [2012CB416603]; National Natural Science Foundation of China [90914001]; Opening Foundation of the Peking University [0000010541]; Undergraduates Innovating Experimentation Project of Jilin University [2010C61164]; SCI(E); ARTICLE; 1; 355-375; 106
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/476353]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Li, Zhuang,Chen, Bin,Wei, Chunjing. Is the Paleoproterozoic Jiao-Liao-Ji Belt (North China Craton) a rift?[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2017.
APA	Li, Zhuang,Chen, Bin,&Wei, Chunjing.(2017).Is the Paleoproterozoic Jiao-Liao-Ji Belt (North China Craton) a rift?.INTERNATIONAL JOURNAL OF EARTH SCIENCES.
MLA	Li, Zhuang,et al."Is the Paleoproterozoic Jiao-Liao-Ji Belt (North China Craton) a rift?".INTERNATIONAL JOURNAL OF EARTH SCIENCES (2017).