Towards quantifying the relative tectonic activity in the Trans-Yamuna segment of NW Himalaya

Ghosh, Swakangkha; Philip, George; Prasad, Anup K.; Syed, Tajdarul H.; Mohanty, Supriya

doi:10.1080/10106049.2022.2155712

Cited by 4 publications

(2 citation statements)

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“…According to the relationship between the basin and fault, the Longchuan River Basin was divided into three sections: the southern section was adjacent to the CNF, the middle section was related to the HSF, and the northern section was near the YLF. The river longitudinal profile, SL, HI, AF, BS, and VF were measured (Table 1) (Bull and Mcfadden, 1977;El Hamdouni et al, 2008;Figueroa and Knott, 2010;Shi et al, 2019;Luo, 2021;Duan et al, 2021;Yu et al, 2022a, b;Ghosh et al, 2023). River geomorphic index is relatively independent, and a single geomorphic morphological index can not well reflect the true meaning of river system, and it can not be directly compared between different rivers (Figueroa and Knott., 2010;Faghih et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

“…As a relatively active part of land topography, the geomorphic index of rivers is extremely sensitive to tectonic activities. The geomorphic index usually reflects the geomorphic evolution information within a certain range and explains the relative tectonic activity within the basin (Whittaker., 2012;Menier et al, 2017;Jaiswara et al, 2020;Ghosh et al, 2023). Bull and Mcfadden (1977) and Silva et al (2003) analysed relative tectonic activity of different piedmonts based on the valley floor height to width ratio (VF).…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of relative tectonic activity in the Longchuan River Basin, central Yunnan: evidence from digital elevation model-based geomorphological analysis

Cao,

Zhu,

Yang

et al. 2023

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The Longchuan River basin lies within the China Sichuan-Yunnan rhomboid block. The NS-trending Yuanmou-Lvzhi River Fault (YLF), NW-trending Chuxiong-Nanhua Fault (CNF) and Shiyang-Huoshaotun Fault (HSF) are found within the basin. The nature of the faults is complex, and the tectonic activity distribution characteristics require further clarification. By extraction from a digital elevation model, the measured longitudinal profile and the geomorphic indices of the Longchuan River, basin showed a stream-length gradient index (SL) of 49-650, hypsometric integral (HI) of 0.27-0.58, drainage basin asymmetry factor (AF) of 3.29-27.47, basin shape index (BS) of 0.87-2.75, valley floor width-to-height ratio (VF) of 0.06-5.40, and evaluation of relative tectonic activity (Iat) of 1.6-2.6. Results showed that river morphology and geomorphological indices in the Longchuan River basin were influenced by tectonic activity, bedrock lithology, climatic conditions, and development time, with tectonic activity playing a dominant role. The relative tectonic activity of the Longchuan River basin was zoned, with a gradual increase in relative tectonic activity from the south to the north. That the slip fault zone primarily controls the tectonic deformation of the Longchuan River basin in central Yunnan and the dynamics of the central Yunnan massif are consistent with the "rigid block lateral extrusion" 1model.

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