Spatial heterogeneity in beryllium isotopic distribution in the Indian Ocean

Jena, Partha Sarathi; Bhushan, Ravi; Shivam, Ajay; Sudheer, A. K.

doi:10.1016/j.gca.2022.12.009

Cited by 4 publications

(1 citation statement)

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“…To check the procedural blank, a treatment procedure similar to the samples was performed in empty vials. The blanks, standards, and samples were measured for beryllium isotopic ratio in the 1 MV Accelerator Mass Spectrometer (AMS) AURiS (Accelerator Unit for Radioisotope Studies) at PRL (Bhushan et al., 2019; Jena, Bhushan, Ajay, et al., 2022; Jena, Bhushan, Ajay, & Sudheer, 2023). The isotopic ratios were normalized with 07KNSTD 10 Be‐14‐5‐6 (Nishiizumi, 2022; Nishiizumi et al., 2007).…”

Section: Methodsmentioning

confidence: 99%

¹⁰Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies

Jena,

Bhushan,

Sharma

et al. 2023

JGR Earth Surface

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Terrestrial cosmogenic nuclide (TCN) dating has emerged as one of the most useful techniques in the last two decades for quantifying geomorphological processes and building the chronology of late Quaternary glacial advances/retreats. The chronology based on TCN and optically stimulated luminescence (OSL) dating of glacial landforms from the northwestern (NW) Himalaya suggests that glaciers responded to a complex interaction between temperature and moisture essentially derived from either of the climate systems, the Indian Summer Monsoon (ISM) and the Mid‐latitude Westerlies (MLW). The discrepancies between the TCN ages obtained on moraine boulders/bedrock surfaces, and the OSL ages on the stratigraphically equivalent deposits, highlighted the need for a detailed investigation. The present study attempts to build the chronology of Quaternary glaciation events in the Karakoram and Ladakh Ranges using TCN dating of stratigraphically constrained moraine boulders and striated bedrock surfaces. The TCN ages from glacially eroded surfaces (GES) having prominent striations are narrowly clustered around the Marine Isotopic Stage‐2 (MIS‐2). Agreement between GES TCN ages and OSL ages on the stratigraphically equivalent moraines suggests negligible geological inheritance. The glacial advance during MIS‐2 can be attributed to the combined effect of reduction in north hemispheric insolation and enhanced westerly precipitation. However, relict non‐glacial surfaces and moraine boulders with minimal ice flow modifications yield wide age distributions, most likely suggesting denudational events (interglacials) and/or contribution from tributary valley flanks.

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Section: Methodsmentioning

confidence: 99%

¹⁰Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies

Jena,

Bhushan,

Sharma

et al. 2023

JGR Earth Surface

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Hindering the applicability of the authigenic 10Be/9Be dating by redeposition of mud in hybrid event beds, eastern Danube Basin, Slovakia

Šujan,

Aherwar,

Šarinová

et al. 2025

Applied Geochemistry

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Spatial variability in residence time of Beryllium in the Indian Ocean

Jena,

Bhushan,

Jena

et al. 2024

Journal of Environmental Radioactivity

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Spatial heterogeneity in beryllium isotopic distribution in the Indian Ocean

Cited by 4 publications

References 58 publications

¹⁰Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies

¹⁰Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies

Hindering the applicability of the authigenic 10Be/9Be dating by redeposition of mud in hybrid event beds, eastern Danube Basin, Slovakia

Spatial variability in residence time of Beryllium in the Indian Ocean

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Spatial heterogeneity in beryllium isotopic distribution in the Indian Ocean

Cited by 4 publications

References 58 publications

10Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies

10Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies

Hindering the applicability of the authigenic 10Be/9Be dating by redeposition of mud in hybrid event beds, eastern Danube Basin, Slovakia

Spatial variability in residence time of Beryllium in the Indian Ocean

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¹⁰Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies

¹⁰Be Exposure Age Dating of Moraine Boulders and Glacially Polished Bedrock Surfaces in Karakoram and Ladakh Ranges, NW Himalaya: Implications in Quaternary Glaciation Studies