10.6084/m9.figshare.3454850.v1
Peter D. Clift
Peter D.
Clift
Liviu Giosan
Liviu
Giosan
Andrew Carter
Andrew
Carter
Eduardo Garzanti
Eduardo
Garzanti
Valier Galy
Valier
Galy
Ali R. Tabrez
Ali R.
Tabrez
Malcolm Pringle
Malcolm
Pringle
Ian H. Campbell
Ian H.
Campbell
Christian France-Lanord
Christian
France-Lanord
Jurek Blusztajn
Jurek
Blusztajn
Charlotte Allen
Charlotte
Allen
Anwar Alizai
Anwar
Alizai
Andreas Lückge
Andreas
Lückge
Mohammed Danish
Mohammed
Danish
M.M. Rabbani
M.M.
Rabbani
Monsoon control over erosion patterns in the Western Himalaya: possible feed-back into the tectonic evolution
Geological Society of London
2016
time δ 13 C
Holocene sea level
Apatite fission track ages
Last Glacial Maximum
tectonic evolution
Himalaya
Bulk sediment analyses
erosion
summer monsoon rains
ka
LGM
Geology
2016-06-21 12:23:52
Dataset
https://geolsoc.figshare.com/articles/dataset/Monsoon_control_over_erosion_patterns_in_the_Western_Himalaya_possible_feed-back_into_the_tectonic_evolution/3454850
<p>The Indus Delta is constructed of sediment eroded from the western Himalaya and since 20 ka has been subjected to strong variations
in monsoon intensity. Provenance changes rapidly at 12–8 ka, although bulk and heavy mineral content remains relatively unchanged.
Bulk sediment analyses shows more negative ε<sub>Nd</sub> and higher <sup>87</sup>Sr/<sup>86</sup>Sr values, peaking around 8–9 ka. Apatite fission track ages and biotite Ar–Ar ages show younger grains ages at 8–9 ka compared
to at the Last Glacial Maximum (LGM). At the same time δ<sup>13</sup>C climbs from –23 to –20‰, suggestive of a shift from terrestrial to more marine organic carbon as Early Holocene sea level
rose. U–Pb zircon ages suggest enhanced erosion of the Lesser Himalaya and a relative reduction in erosion from the Transhimalaya
and Karakoram since the LGM. The shift in erosion to the south correlates with those regions now affected by the heaviest
summer monsoon rains. The focused erosion along the southern edge of Tibet required by current tectonic models for the Greater
Himalaya would be impossible to achieve without a strong summer monsoon. Our work supports the idea that although long-term
monsoon strengthening is caused by uplift of the Tibetan Plateau, monsoon-driven erosion controls Himalayan tectonic evolution.
</p>