Intracontinental extension and geodynamic evolution of the Paleoproterozoic Jiao-Liao-Ji belt, North China craton: Insights from coeval A-type granitic and mafic magmatism in eastern Liaoning Province

doi:10.1130/B35819.1

CORC > 海洋研究所 > 中国科学院海洋研究所

	Intracontinental extension and geodynamic evolution of the Paleoproterozoic Jiao-Liao-Ji belt, North China craton: Insights from coeval A-type granitic and mafic magmatism in eastern Liaoning Province
	Liu, Jian-Hui 1; Wang, Xiang-Jian 2; Chen, Hui 1
刊名	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
	2021-07-01
卷号	133 期号:7-8 页码:1765-1792
ISSN号	0016-7606
DOI	10.1130/B35819.1
通讯作者	Liu, Jian-Hui(liujianhui1999@163.com)
英文摘要	To better understand the origin and tectonic evolution of the Paleoproterozoic Jiao-Liao- Ji belt, North China craton, which have long been debated, we have conducted whole-rock geochemical and zircon U-Pb and Hf isotope analyses on Paleoproterozoic monzo(syeno) granitic gneisses and metamafic rocks from eastern Liaoning Province. The results indicate that these monzo(syeno)granitic gneisses and metamafic rocks formed concurrently at ca. 2.2-2.1 Ga. The monzo(syeno)granitic gneisses show geochemical features of A-type granites and were derived from dehydration melting of Archean tonalite-trondhjemite- granodiorite (TTG) with minor involvement of coeval mantle-derived magma in an extensional setting. The metamafic rocks are geochemically similar to mid-ocean-ridge ba- salt; they were generated by partial melting of isotope-depleted asthenospheric mantle in an intracontinental extensional setting and experienced crustal and continental litho- spheric mantle contamination and fractional crystallization. Based on this study and pub- lished geological evidence, we propose the following tectonic model for the origin and geodynamic evolution of the Jiao-Liao-Ji belt: (1) Generation of high-density eclogitized lower crust accompanied by formation of voluminous Archean TTGs in the Eastern block; (2) intracontinental extension driven by upwelling of an asthenospheric hotspot along the Jiao-Liao-Ji belt in period of 2.202.0 Ga; (3) convergent orogenic processes between the Longgang block and Nangrim block governed by gravity-driven subduction of high-density eclogitized lower crust at ca. 1.95-1.85 Ga; and (4) postorogenic extension caused by delamination of the orogenic root and subsequent hot asthenospheric upwelling. This tectonic model can well explain the origin and geodynamic evolution of the Paleoproterozoic Jiao-Liao-Ji belt.
资助项目	National Natural Science Foundation of China[41772195] ; Geological Survey Fund of the China Geological Survey[DD20190358] ; Geological Survey Fund of the China Geological Survey[DD20160121] ; Natural Science Foundation of Shandong Province[ZR2016DM01] ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences[J1214] ; Basic Scientific Research Foundations of the Institute of Geology, Chinese Academy of Geological Sciences[J1404]
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000672732700025
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/175761]
专题	中国科学院海洋研究所
通讯作者	Liu, Jian-Hui
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jian-Hui,Wang, Xiang-Jian,Chen, Hui. Intracontinental extension and geodynamic evolution of the Paleoproterozoic Jiao-Liao-Ji belt, North China craton: Insights from coeval A-type granitic and mafic magmatism in eastern Liaoning Province[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2021,133(7-8):1765-1792.
APA	Liu, Jian-Hui,Wang, Xiang-Jian,&Chen, Hui.(2021).Intracontinental extension and geodynamic evolution of the Paleoproterozoic Jiao-Liao-Ji belt, North China craton: Insights from coeval A-type granitic and mafic magmatism in eastern Liaoning Province.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,133(7-8),1765-1792.
MLA	Liu, Jian-Hui,et al."Intracontinental extension and geodynamic evolution of the Paleoproterozoic Jiao-Liao-Ji belt, North China craton: Insights from coeval A-type granitic and mafic magmatism in eastern Liaoning Province".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 133.7-8(2021):1765-1792.