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Sedimentation in the ephemeral landslide dammed paleolake in Indo-Burmese Range: Late Pleistocene-Holocene climatic variability and surface processes coupling.

Gogoi A, Pandey P, Pandey AK.

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY

https://doi.org/10.1016/j.palaeo.2025.113279 

Landslide-dammed paleolake deposits in the Indo-Burmese range serve as important sedimentary archives, preserving tectonic and climatic signals through the surface processes during Late-Quaternary-Holocene period. We examined the geomorphology, sedimentological and geochemical proxies to estimate duration of the ephemeral lake, and reconstruct past climatic and tectonic processes coupling. Results indicate that the lake formed during the pre Holocene Bølling-Allerød period (12-12.9 ka), a global climatic extreme precipitation. This unique geomorphic and local climatic variation control is important in exploring the Quaternary sediment archive, which deepens our understanding of the interplay between climate and surface processes. It also suggest a complex interaction of the fluvial landscape evolution and erosion-aggradation patterns in a fluctuating climatic setup.

(a) Inset- high ksn values (red)- areas of high erosion in the Daili-Imphal catchment region. Relief map- erosional catchments and sediment aggradation in the debris fans. (b) The longitudinal profile of the Daili Imphal River shows the mean elevation of the lacustrine deposit, the lake strandline, and the location of the river dam by debris fan.

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