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	Continental crustal growth and the supercontinental cycle: evidence from the Central Asian Orogenic Belt
	Hong, DW ; Zhang, JS ; Wang, T ; Wang, SG ; Xie, XL
	2004
关键词	continental crustal growth supercontinent Central Asian Orogenic Belt A-TYPE GRANITES ND ISOTOPE GEOCHEMICAL CONSTRAINTS HERCYNIAN LEUCOGRANITES NORTHEASTERN CHINA DEPLETED-MANTLE INNER-MONGOLIA U-PB SR PETROGENESIS
英文摘要	Studies of supercontinental cycle are mainly concentrated on the assembly, breakup and dispersal of supercontinents, and studies of continental crustal growth largely on the growth and loss (recycling) of the crust. These two problems have long been studied separately from each other. The Paleozoic-Mesozoic granites in the Central Asian Orogenic Belt have commonly positive epsilonNd values, implying large-scale continental crustal growth in the Phanerozoic. They coincided temporally and spatially with the Phanerozoic Pangea supercontinental cycle, and overlapped in space with the P-wave high-V anomalies and calculated positions of subducted slabs for the last 180 Ma, all this suggests that the Phanerozoic Laurasia supercontinental assembly was accompanied by large-scale continental crustal growth in central Asia. Based on these observations, this paper proposes that there may be close and original correlations between a supercontinental cycle, continental crustal growth and catastrophic slab avalanches in the mantle. In this model we suggest that rapid continental crustal growth occurred during supercontinent assembly, whereas during supercontinental breakup and dispersal new additions of the crust were balanced by losses, resulting in a steady state system. Supercontinental cycle and continental crustal growth are both governed by changing patterns of mantle convection. (C) 2003 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000223837700013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; SCI(E); CPCI-S(ISTP); 94
语种	英语
DOI标识	10.1016/S1367-9120(03)00134-2
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/254417]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Hong, DW,Zhang, JS,Wang, T,et al. Continental crustal growth and the supercontinental cycle: evidence from the Central Asian Orogenic Belt. 2004-01-01.

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