U-Pb ages of the Himalayan foreland basin Northeast India: Implications for the India-Asia collision

Upendra Baral; Lin Ding; Bhupati Neupane

doi:10.1080/22020586.2019.12073115

2nd Australasian Exploration Geoscience Conference: Data to Discovery

ISSN: 2202-0586
E-ISSN:

oa U-Pb ages of the Himalayan foreland basin Northeast India: Implications for the India-Asia collision
Authors Upendra Baral^a,d,e, Lin Ding^b,d and Bhupati Neupane^c,d,e
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^a [email protected] ^b [email protected] ^c [email protected] ^d Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, , Beijing, 100101, , China ^e Centre for Disaster Studies and Climate Change, , Basnbari, Kathmandu, Nepal
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2019, Issue 2nd Australasian Exploration Geoscience Conference: Data to Discovery, Dec 2019, p. 1 - 2
DOI: https://doi.org/10.1080/22020586.2019.12073115
- Published online: 01 Dec 2019

Abstract

Summary

Syn- and post-collision between Indian and Eurasian plates, several peripheral foreland basins were formed that accommodate the detritus from the adjoining regions. The geochronological study is a precise tool for understanding the provenance in this regards several studies have been carried out in the central and western Himalayan foreland basin, while very little in the eastern Himalaya. The present study carried out in the Siang river valley, eastern Himalaya by means of detrital zircon U-Pb geochronology. The Late Paleocene to Early Eocene Lower Yinkiong Formation and Early to Mid-Eocene Upper Yinkiong Formation, deposited in the distal foredeep and foredeep deopzone of the foreland basin respectively. The detrital ages of the Lower Yinkiong Formation are dominantly older than late Paleozoic, resembling the cratonic and early Himalayan Thrust Belt (HTB) affinity. However, there is the presence of Cenozoic age grains in Upper Yinkiong Formation indicate the HFB source and possible the granitic body within the Asian plate. This shifting of source regions signifies the India-Asia collision in the Eastern Himalaya began before or immediately after the Early Eocene (~56-50 Ma).

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References

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/content/journals/10.1080/22020586.2019.12073115

Article Type: Research Article

Keyword(s): Eastern Himalaya; India-Asia collision; Provenance Analysis; Siang window; Yinkiong Formation

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oa U-Pb ages of the Himalayan foreland basin Northeast India: Implications for the India-Asia collision

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