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DOI	10.1126/science.288.5465.497
	Tectonic implications of U-Pb zircon ages of the Himalayan orogenic belt in Nepal
	DeCelles P.G.; Gehrels G.E.; Quade J.; LaReau B.; Spurlin M.
发表日期	2000
ISSN	0036-8075
起始页码	497
结束页码	499
卷号	288 期号:5465
英文摘要	Metasedimentary rocks of the Greater Himalaya are traditionally viewed as Indian shield basement that has been thrust southward onto Lesser Himalayan sedimentary rocks during the Cenozoic collision of India and Eurasia. Ages determined from radioactive decay of uranium to lead in zircon grains from Nepal suggest that Greater Himalayan protoliths were shed from the northern end of the East African orogen during the late Proterozoic pan- African orogenic event. These rocks were accreted onto northern Gondwana and intruded by crustal melts during Cambrian-Ordovician time. Our data suggest that the Main Central thrust may have a large amount of pre-Tertiary displacement, that structural restorations placing Greater Himalayan rocks below Lesser Himalayan rocks at the onset of Cenozoic orogenesis are flawed, and that some metamorphism of Greater Himalayan rocks may have occurred during early Paleozoic time.
英文关键词	lead; uranium; zirconium; deformation; Himalayan orogeny; metamorphism; orogenic belt; tectonic evolution; tectonics; uranium-lead dating; article; geographic distribution; geology; Nepal; priority journal; rock; sediment; Nepal
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243494
作者单位	Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States
推荐引用方式 GB/T 7714	DeCelles P.G.,Gehrels G.E.,Quade J.,et al. Tectonic implications of U-Pb zircon ages of the Himalayan orogenic belt in Nepal[J],2000,288(5465).
APA	DeCelles P.G.,Gehrels G.E.,Quade J.,LaReau B.,&Spurlin M..(2000).Tectonic implications of U-Pb zircon ages of the Himalayan orogenic belt in Nepal.Science,288(5465).
MLA	DeCelles P.G.,et al."Tectonic implications of U-Pb zircon ages of the Himalayan orogenic belt in Nepal".Science 288.5465(2000).