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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.·2000·Science

Abstract

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.

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Metadata

Authors
DeCelles, P. G., Gehrels, G. E., Quade, J., LaReau, B., & Spurlin, M.
Venue
Science
Published
2000-04-21
Volume
288
Issue
5465
Pages
497-499
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1984200080
Cited by
601
References
0
FWCI
12.20
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Tectonic Implications of U-Pb Zircon Ages of the Himalayan Orogenic Belt in Nepal. https://app.cochat.ai/papers/10.1126/science.288.5465.497
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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. https://doi.org/10.1126/science.288.5465.497

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