Magmatism during continental collision, subduction, exhumation and   mountain collapse in collisional orogenic belts and continental net   growth: A perspective

doi:10.1007/s11430-015-5102-x

CORC > 北京大学 > 地球与空间科学学院

	Magmatism during continental collision, subduction, exhumation and mountain collapse in collisional orogenic belts and continental net growth: A perspective
	Song ShuGuang ; Wang MengJue ; Wang Cao ; Niu YaoLing
刊名	SCIENCE CHINA-EARTH SCIENCES
	2015
关键词	collisional orogeny continental deep subduction orogen unrooting and collapse magmatism continental net growth NORTH CHINA CRATON QAIDAM UHPM BELT U-PB ZIRCON BENEATH SOUTHERN TIBET WESTERN GNEISS REGION EAST-CENTRAL CHINA ULTRAHIGH-PRESSURE METAMORPHISM TRONDHJEMITE-GRANODIORITE TTG MULTIPHASE SOLID INCLUSIONS CRUST-MANTLE INTERACTION
DOI	10.1007/s11430-015-5102-x
英文摘要	Continental orogens on Earth can be classified into accretionary orogen and collisional orogen. Magmatism in orogens occurs in every periods of an orogenic cycle, from oceanic subduction, continental collision to orogenic collapse. Continental collision requires the existence of prior oceanic subduction zone. It is generally assumed that the prerequisite of continental deep subduction is oceanic subduction and its drag force to the connecting passive-margin continental lithosphere during continental collision. Continental subduction and collision lead to the thickening and uplift of crust, but the formation time of the related magmatism in orogens depends on the heating mechanism of lithosphere. The accretionary orogens, on the other hand, have no strong continental collision, deep subduction, no large scale of crustal thrusting, thickening and uplift, and no UHP eclogite-facies metamorphic rocks related to continental deep subduction. Even though arc crust could be significantly thickened during oceanic subduction, it is still doubtful that syn- or post-collisional magmatism would be generated. In collisional orogens, due to continental deep subduction and significant crustal thickening, the UHP metamorphosed oceanic and continental crusts will experience decompression melting during exhumation, generating syn-collisional magmatism. During the orogen unrooting and collapse, post-collisional magmatism develops in response to lithosphere extension and upwelling of asthenospheric mantle, marking the end of an orogenic cycle. Therefore, magmatism in orogens can occur during the continental deep subduction, exhumation and uplift after detachment of subducted oceanic crust from continental crust, and extensional collapse. The time span from continental collision to collapse and erosion of orogens (the end of orogenic cycle) is 50-85 Myr. Collisional orogens are the key sites for understanding continental deep subduction, exhumation, uplift and orogenic collapse. Magmatism in collisional orogens plays important roles in continental reworking and net growth.; National Basic Research Program of China [2015CB856105]; National Natural Science Foundation of China [41372060, 41430207, 41130314, 41121062]; Basic Geological Survey Programs of China Geological Survey [1212011121258]; SCI(E); EI; REVIEW; sgsong@pku.edu.cn; 8; 1284-1304; 58
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/417823]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Song ShuGuang,Wang MengJue,Wang Cao,et al. Magmatism during continental collision, subduction, exhumation and mountain collapse in collisional orogenic belts and continental net growth: A perspective[J]. SCIENCE CHINA-EARTH SCIENCES,2015.
APA	Song ShuGuang,Wang MengJue,Wang Cao,&Niu YaoLing.(2015).Magmatism during continental collision, subduction, exhumation and mountain collapse in collisional orogenic belts and continental net growth: A perspective.SCIENCE CHINA-EARTH SCIENCES.
MLA	Song ShuGuang,et al."Magmatism during continental collision, subduction, exhumation and mountain collapse in collisional orogenic belts and continental net growth: A perspective".SCIENCE CHINA-EARTH SCIENCES (2015).