Version 1
: Received: 1 February 2024 / Approved: 9 February 2024 / Online: 9 February 2024 (07:46:26 CET)
How to cite:
Pan, X.; Shen, X.; He, Z.; Yuan, X.; Ge, Y.; Wu, X.; Jia, Y.; Tang, X. Responses of Geomorphic Indices to the Northward Migration of the Eastern Himalayan Syntaxis. Preprints2024, 2024020554. https://doi.org/10.20944/preprints202402.0554.v1
Pan, X.; Shen, X.; He, Z.; Yuan, X.; Ge, Y.; Wu, X.; Jia, Y.; Tang, X. Responses of Geomorphic Indices to the Northward Migration of the Eastern Himalayan Syntaxis. Preprints 2024, 2024020554. https://doi.org/10.20944/preprints202402.0554.v1
Pan, X.; Shen, X.; He, Z.; Yuan, X.; Ge, Y.; Wu, X.; Jia, Y.; Tang, X. Responses of Geomorphic Indices to the Northward Migration of the Eastern Himalayan Syntaxis. Preprints2024, 2024020554. https://doi.org/10.20944/preprints202402.0554.v1
APA Style
Pan, X., Shen, X., He, Z., Yuan, X., Ge, Y., Wu, X., Jia, Y., & Tang, X. (2024). Responses of Geomorphic Indices to the Northward Migration of the Eastern Himalayan Syntaxis. Preprints. https://doi.org/10.20944/preprints202402.0554.v1
Chicago/Turabian Style
Pan, X., Yingying Jia and Xiudang Tang. 2024 "Responses of Geomorphic Indices to the Northward Migration of the Eastern Himalayan Syntaxis" Preprints. https://doi.org/10.20944/preprints202402.0554.v1
Abstract
The Eastern Himalayan Syntaxis (EHS), featured by an exceptionally intense compression orogeny and an extremely rapid surface erosion rate, stands out as a prime area for investigating surface processes and landscape evolution. Understanding the formation of the EHS holds significant importance in advancing our comprehension of the evolutionary dynamics within the Tibetan Plateau and the complex interplay between endogenic and exogenic geological processes. Currently, two models, namely the tectonic aneurysm and the syntaxis expansion model, have been proposed to explain the formation and evolution of this syntaxis. In this study, we employ a multi-disciplinary approach, integrating geomorphic indices such as slope, relief, Hypsometric Integral (HI), Normalized Channel Steepness (Ksn), River Slope-Basin Area Integration (χ), combined with erosion rates on long-medium-short term timescales obtained from thermochronology, cosmogenic nuclides 10Be and landslide disaster probability data. Our findings suggest a relatively high tectonic activity in the confluence of the Yigong and Parlung Rivers in the northern end of the syntaxis. Moreover, our data reveals that spatial variability of tectonic activity is the primary driver of regional geomorphologic features and the spatial-temporal characteristics of erosion observed in the EHS, with lithology and climatic precipitation playing a lesser role. Furthermore, the northwards migration of the EHS appears to elucidate the shift of tectonic activity and rapid erosion from the core of the syntaxis near the Namche Barwa towards the confluence of the Yigong and Parlung Rivers. This northwards migration of the EHS underscores the need for increased attention to the high geological hazard risk in the northern part of the EHS.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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