Enhanced Late Miocene Chemical Weathering and Altered Precipitation Patterns in the Watersheds of the Bay of Bengal Recorded by Detrital Clay Radiogenic Isotopes

Abstract

The late Miocene was an important period within the global Cenozoic cooling trend and was marked by extensive changes in marine and terrestrial environments and ecosystems (e.g.,

Provenance Shifts During Neogene Brahmaputra Delta Progradation Tied to Coupled Climate and Tectonic Change in the Eastern Himalaya

“…The introduction of cold water from the Southern Ocean during expansion of Antarctic ice volume shifted precipitation bands farther north as sea-level dropped after the Miocene Climate Optimum (Holbourn et al, 2010;Miller et al, 2005;Yang et al, 2020;Zachos et al, 2001) and initiation of the South Asian Monsoon (Betzler et al, 2016) intensified erosion of the high Himalaya (cf. Bretschneider, Hathorne, Bolton, et al, 2021;Bretschneider, Hathorne, Huang, et al, 2021). The timing of these late Miocene eustatic and climatic shifts overlaps with the progradation of the fluvial Tipam Group (∼10-8 Ma) across the paleo-shelf (Sincavage et al, 2020) and an increase in both the mass accumulation rate and proportion of Trans-Himalayan Arc sediment in the Nicobar Fan at ∼9 Ma (Chen et al, 2020;Pickering, Pouderoux, et al, 2020;Pickering, Carter, et al, 2020).…”

“…In the originally published version of this article, two references (Bretschneider, Hathorne, Bolton, et al, 2021;Bretschneider, Hathorne, Huang, et al, 2021) were missing in the reference section and as in-text citations in the second to last sentence of Section 5.3, paragraph 2. The references are now added to the article.…”