Seismic stratigraphy and the sedimentation history in the Laxmi Basin of the eastern Arabian Sea: Constraints from IODP Expedition 355

Nair, Nisha; Pandey, Dhananjai K.; Pandey, Anju; Prerna, R.

doi:10.1016/j.gsf.2020.11.008

Cited by 7 publications

(6 citation statements)

References 54 publications

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“…Temporal framework of sedimentation rates in the Oligocene – Miocene sections of the Kutch Basin and their comparison to published data from Arabian Sea (Beasley et al, 2021; Clift, 2006; Nair et al, 2021; Pandey et al, 2020) and Bay of Bengal (Krishna et al, 2016) sites, and to global climatic variability (Mathew et al, 2020; Zachos et al, 2001). …”

Section: Discussionmentioning

confidence: 85%

“…On the other hand, the increase in sedimentation during Early Miocene of the Kutch Basin is in agreement with the sediment budgets derived from seismic stratigraphy data from the Indus Fan which shows rapid erosion during the early-late Miocene (24-11 Ma) in response to Himalayan uplift and precipitation changes largely related to monsoon strengthening (Figure 11) (Clift, 2006(Clift, , 2010(Clift, , 2017. Alternatively, a relative increase in the terrigenous fraction coincident with strengthening of a proto-South Asian monsoon system, is also reported at the F I G U R E 1 1 Temporal framework of sedimentation rates in the Oligocene-Miocene sections of the Kutch Basin and their comparison to published data from Arabian Sea (Beasley et al, 2021;Clift, 2006;Nair et al, 2021;Pandey et al, 2020) and Bay of Bengal (Krishna et al, 2016) sites, and to global climatic variability (Mathew et al, 2020;Zachos et al, 2001).…”

Section: Sedimentation Rate Based On Sis Agesmentioning

confidence: 80%

“…Oligocene-Miocene transition (Beasley et al, 2021;Clift, 2006). Likewise, sediment accumulation rates estimated from the Laxmi Basin of the eastern Arabian Sea showed maximum sedimentation during early-middle to late Miocene (Nair et al, 2021;Pandey et al, 2020).…”

Section: Sedimentation Rate Based On Sis Agesmentioning

confidence: 95%

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Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Singh,

Vadlamani,

Bajpai

et al. 2024

Geological Journal

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The Kutch Basin of western India exposes one of the most complete, fossiliferous marine Cenozoic sedimentary sequences of India. Precise depositional ages of these sequences are of great importance in the reconstruction of palaeoclimatic and palaeobiogeographic histories of the basin. Due to the poorly constrained foraminiferal biostratigraphic ages, we conducted high‐resolution 87Sr/86Sr chronology of the various fossiliferous, stratigraphically continuous units of Oligocene–Miocene strata in Kutch Basin. Besides updating the previously determined 87Sr/86Sr chronology, we report new numerical depositional ages for Oligocene–Miocene formations and members, and correlated these ages to the existing biostratigraphic schemes. The new 87Sr/86Sr data indicates a depositional age range between 28.64 + 0.29/‐1.11 and 23.51 + 1.53/‐1.85 Ma (Rupelian‐Chattian) for the Maniyara Fort Formation, between 23.07 + 0.94/1.39 and 18.09 + 0.24/‐0.57 Ma (Chattian‐Burdigalian) for the Khari Nadi Formation, and between 15.11 + 0.56/‐2.87 and 12.29 + 1.22/‐1.9 Ma (Langhian‐Serravallian) for the Chhasra Formation. The sedimentation rate, determined through numerical ages derived from 87Sr/86Sr, indicates an increase in sedimentation for the Khari Nadi (0.23 ± 0.04 cm/kyr) and Chhasra (0.12 ± 0.04 cm/kyr) formations, likely related to uplift of the Himalaya‐Tibetan plateau and intensification of the Indian Summer Monsoon. The bulk sediment element ratios (V/Ni, Ni/Co and V/Cr) indicate oxic to suboxic palaeo‐redox conditions during deposition of the Oligocene–Miocene successions of the basin. Based on new and updated 87Sr/86Sr chronology, the depositional environments and sedimentation rates of the Kutch sequence are correlated with changes in sea‐level, sedimentation rates in the Arabian Sea and Bay of Bengal, and the global climate changes across the Oligocene–Miocene boundary.

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Section: Discussionmentioning

confidence: 85%

Section: Sedimentation Rate Based On Sis Agesmentioning

confidence: 80%

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Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Singh,

Vadlamani,

Bajpai

et al. 2024

Geological Journal

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“…Details of the regional tectonic settings of the study area have already been discussed elsewhere 29 , 63 . Briefly, the core site U1457 C lies on the western end of NW-SE oriented Laxmi basin in the eastern Arabian Sea 29 .…”

Section: Methodsmentioning

confidence: 99%

“…Briefly, the core site U1457 C lies on the western end of NW-SE oriented Laxmi basin in the eastern Arabian Sea 29 . The Laxmi Basin is a rift basin situated between the Laxmi Ridge in the west and the passive margin of the west coast of India 63 occupied by the distal fan of the Indus delta. The sediments of this region are mostly supplied by the Indus River and a few westward-flowing peninsular rivers.…”

Section: Methodsmentioning

confidence: 99%

Modern-like deep water circulation in Indian Ocean caused by Central American Seaway closure

et al. 2022

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Global overturning circulation underwent significant changes in the late Miocene, driven by tectonic forcing, and impacted the global climate. Prevailing hypotheses related to the late Miocene deep water circulation (DWC) changes driven by the closure of the Central American Seaways (CAS) and its widespread impact remains untested due to the paucity of suitable records away from the CAS region. Here, we test the hypothesis of the large-scale circulation changes by providing a high-resolution record of DWC since the late Miocene (11.3 to ~2 Ma) from the north-western Indian Ocean. Our investigation reveals a progressive shift from Pacific-dominated DWC before ~9.0 Ma to the onset of a modern-like DWC system in the Indian Ocean comprising of Antarctic bottom water and northern component water during the Miocene-Pliocene transition (~6 Ma) caused by progressive shoaling of the CAS and suggests its widespread impact.

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Reply to Comment on “Singh R, Vadlamani R, Bajpai S & Maurya AS (2024) Strontium Isotope Stratigraphy of Marine Oligocene–Miocene Sedimentary Successions of Kutch Basin, Western India. Geological Journal, 1–20. DOI: 10.1002/gj.4961”

Singh,

Vadlamani,

Bajpai

et al. 2024

Geological Journal

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This response addresses the comments made by Saraswati et al. on our recent publication in Geological Journal. In our study, we used a multi‐analytical screening approach, including visual, XRD and trace element analysis, to evaluate diagenetic alteration of carbonate shell samples. Contrary to the claims made by Saraswati et al. our findings are based on well‐preserved samples with minimal alteration. The Sr‐isotope data from the Khari Nadi Formation (23.07–18.09 Ma) are largely consistent with existing biostratigraphic constraints, but suggest a possible extension of the upper age limit into the Burdigalian. Our Sr‐isotope ages for the Chhasra Formation (15.11–12.29 Ma) are younger than those suggested previously, based on larger benthic foraminifers, but largely corroborate recent nannoplankton data. As a result of the new age data from Kutch, we suggest that the sedimentation rates, derived from multiple samples, increased significantly from the Oligocene to Miocene. We assert that ‘established’ ages are also subject to refinements as the rock units become amenable to new dating techniques. We welcome any criticism that is constructive, and remain open to any further data that could refine or challenge our interpretations.

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Seismic stratigraphy and the sedimentation history in the Laxmi Basin of the eastern Arabian Sea: Constraints from IODP Expedition 355

Cited by 7 publications

References 54 publications

Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Modern-like deep water circulation in Indian Ocean caused by Central American Seaway closure

Reply to Comment on “Singh R, Vadlamani R, Bajpai S & Maurya AS (2024) Strontium Isotope Stratigraphy of Marine Oligocene–Miocene Sedimentary Successions of Kutch Basin, Western India. Geological Journal, 1–20. DOI: 10.1002/gj.4961”

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