Quantifying Crustal Thickness in Continental Collisional Belts: Global   Perspective and a Geologic Application

doi:10.1038/s41598-017-07849-7

CORC > 北京大学 > 地球与空间科学学院

	Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application
	Hu, Fangyang ; Ducea, Mihai N. ; Liu, Shuwen ; Chapman, James B.
刊名	SCIENTIFIC REPORTS
	2017
关键词	CENTRAL CHINA IMPLICATIONS ARC FRONT STRATOVOLCANOES QINLING OROGENIC BELT TECTONIC EVOLUTION SOUTHERN TIBET BASIN DEVELOPMENT GEODYNAMIC EVOLUTION GANGDESE MOUNTAINS HIMALAYAN OROGEN GRANITOID ROCKS
DOI	10.1038/s41598-017-07849-7
英文摘要	We present compiled geochemical data of young (mostly Pliocene-present) intermediate magmatic rocks from continental collisional belts and correlations between their whole-rock Sr/Y and La/Yb ratios and modern crustal thickness. These correlations, which are similar to those obtained from subduction-related magmatic arcs, confirm that geochemistry can be used to track changes of crustal thickness changes in ancient collisional belts. Using these results, we investigate temporal variations of crustal thickness in the Qinling Orogenic Belt in mainland China. Our results suggest that crustal thickness remained constant in the North Qinling Belt (similar to 45-55 km) during the Triassic to Jurassic but fluctuates in the South Qinling Belt, corresponding to independently determined tectonic changes. In the South Qinling Belt, crustal thickening began at similar to 240 Ma and culminated with 60-70-km-thick crust at similar to 215 Ma. Then crustal thickness decreased to similar to 45 km at similar to 200 Ma and remained the same to the present. We propose that coupled use of Sr/Y and La/Yb is a feasible method for reconstructing crustal thickness through time in continental collisional belts. The combination of the empirical relationship in this study with that from subduction-related arcs can provide the crustal thickness evolution of an orogen from oceanic subduction to continental collision.; China Scholarship Council [201606010070]; China Geological Survey [1212011085534]; National Projects of Scientific and Technological Support [2011BAB04B05]; National Natural Science Foundation of China [41530207, 41502179, 41472165]; Romanian Executive Agency for Higher Education, Research, Development and Innovation Funding project [PN-III-P4-ID-PCE-2016-0127]; SCI(E); ARTICLE; 7
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471758]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Hu, Fangyang,Ducea, Mihai N.,Liu, Shuwen,et al. Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application[J]. SCIENTIFIC REPORTS,2017.
APA	Hu, Fangyang,Ducea, Mihai N.,Liu, Shuwen,&Chapman, James B..(2017).Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application.SCIENTIFIC REPORTS.
MLA	Hu, Fangyang,et al."Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application".SCIENTIFIC REPORTS (2017).