Detrital zircon evidence from Burma for reorganization of the eastern Himalayan rivers system

Yu Hsuan Liang, Sun Lin Chung*, Dunyi Liu, Yigang Xu, Fu Yuan Wu, Jin Hui Yang, Yanbin Wang, Ching Hua Lo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)

Abstract

The first in situ Hf and U-Pb isotope analyses of detrital zircons from Upper Miocene sandstone in the Inner-Burma Tertiary Basin, together with data of igneous zircons from the eastern Transhimalayan batholith from southern Tibet to Burma, enable us to study the sedimentary source to sink relation and river evolution around the eastern Himalayas. Among 47 out of 62 dated zircons from the Miocene sandstone that exhibit Cretaceous and Paleogene 206 Pb/238U ages, 24 grains have positive εHf(T) isotope values up to + 16. Whilst zircons of such ages are common in the Transhimalayan plutons, those showing high εHf(T) values have been observed so far only in the Gangdese batholith. Our results, therefore, support the notion that by Late Miocene time the Yarlu Tsangpo, which flows past the Gangdese batholith in southeastern Tibet, drained into the Irrawaddy River. We attribute this river routing to not only regional topographic control but also the dextral movement of the Jiali-Gaoligong-Sagaing fault system that appears most active during the Middle Miocene. Subsequent reorganization of these mountain rivers was affiliated with headward erosion of the Brahmaputra River that eventually cut across the Namche Barwa Syntaxis and captured the Yarlu Tsangpo drainage to form the modern eastern Himalayan river system.

Original languageEnglish
Pages (from-to)618-638
Number of pages21
JournalAmerican Journal of Science
Volume308
Issue number4
DOIs
Publication statusPublished - Apr 2008
Externally publishedYes

Fingerprint

Dive into the research topics of 'Detrital zircon evidence from Burma for reorganization of the eastern Himalayan rivers system'. Together they form a unique fingerprint.

Cite this