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Magmatism during continental collision, subduction, exhumation and mountain collapse in collisional orogenic belts and continental net growth: A perspective
Song ShuGuang1; Wang MengJue1; Wang Cao1; Niu YaoLing2,3
2015-08-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
Volume58Issue:8Pages:1284-1304
SubtypeReview
AbstractContinental 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.
KeywordCollisional Orogeny Continental Deep Subduction Orogen Unrooting And Collapse Magmatism Continental Net Growth
DOI10.1007/s11430-015-5102-x
Indexed BySCI
Language英语
WOS IDWOS:000358549800003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/49608
Collection海洋生态与环境科学重点实验室
Affiliation1.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belt & Crustal Evolut, Beijing 100871, Peoples R China
2.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
Recommended Citation
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,2015,58(8):1284-1304.
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,58(8),1284-1304.
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 58.8(2015):1284-1304.
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