Origin and evolution of the Vindhyan Basin: a geochemical perspective

Basu, Pallabi; Chakrabarti, Ramananda

doi:10.16943/ptinsa/2020/49808

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…1a) is the largest in size with an aerial extent of approximately 178,000 Km 2 and comprising a~5 km thick pile of dominantly undeformed and unmetamorphosed siliciclastic and carbonate sediments belonging to four groups which from the base to the top are Semri (Lower Vindhyans), Kaimur, Rewa, and Bhander (Upper Vindhyans) (Tandon et al, 1991). The~2.5 Ga old Bundelkhand Granite Massif occurs at the centre of the basin and divides it into two subbasins: The Son Valley Vindhyan (SVV) sub-basin in the east and the Chambal Valley Vindhyan (CVV) sub-basin in the west (e.g., Basu and Chakrabarti, 2020) (Fig. 1a).…”

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confidence: 99%

A combined geochemical, Nd, and stable Ca isotopic investigation of provenance, paleo-depositional setting and sub-basin connectivity of the Proterozoic Vindhyan Basin, India

Basu

Banerjee

Chakrabarti

2021

Lithos

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Trace elements and Nd and Ca isotopesGeochemical and isotopic investigation of Proterozoic clastic and chemical sedimentary rocks provide insights into surface conditions of the early Earth. The mid-Proterozoic Vindhyan Basin of central India, comprising 5 km thick, mostly undeformed and unmetamorphosed clastic and chemical sediments, is one such archive which is exposed in two sub-basins, the Son Valley Vindhyan sub-basin in the east (SVV) and Chambal Valley Vindhyan sub-basin in the west (CVV). Geochemical and Nd isotopic compositions of siliciclastic sedimentary rocks from the CVV sub-basin are reported in order to understand the provenance of the Vindhyan sediments in this sub-basin and the results are compared with the provenance of the sediments exposed in the SVV subbasin to evaluate whether the two sub-basins had shared a common provenance. Elemental ratios, such as Th/Co, La/Sc suggest that the clastic sedimentary rocks from the CVV have dominantly upper crustal silicic/felsic provenances and are broadly similar to those of equivalent stratigraphic horizons from the SVV. Initial Nd isotopic composition (ε Nd(t) ) of the siliciclastic rocks from the Lower Vindhyans of the CVV, calculated at their respective times of deposition, suggest sediment derivation from the Banded Gneissic Complex, Berach Granitoids, 1.82 Ga continental arc granitoids of the Aravalli Range and the Hindoli Volcanics. In contrast, the ε Nd(t) values of the Upper Vindhyan siliciclastics suggest that the Delhi Belt granitoids were the primary source of detritus during the deposition of these sediments. Paleo-depositional environment and connectivity between the SVV and CVV sub-basins are evaluated using geochemical, radiogenic Nd, and stable Ca isotopic compositions of carbonates from both sub-basins. Non-redox sensitive REY anomalies and Y/Ho ratios of carbonates from the two subbasins suggest deposition in an epeiric sea with limited connection to the open ocean. Neodymium isotopic compositions of the carbonate units suggest that the two sub-basins were connected during the deposition of both Lower and Upper Vindhyan sediments. Carbonates from both sub-basins record a significant shift towards more radiogenic Nd isotopic compositions around 1.6 Ga, possibly as a result of an Andean-type arc magmatism in near vicinity of the Son Valley sub-basin. The δ 44/40 Ca compositions of the SVV carbonates are typically lower than the CVV carbonates. This difference is likely due to greater freshwater input in the SVV sub-basin which is consistent with the existence of paleo-gradients in the Vindhyan Basin.

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Section: Introductionmentioning

confidence: 99%

A combined geochemical, Nd, and stable Ca isotopic investigation of provenance, paleo-depositional setting and sub-basin connectivity of the Proterozoic Vindhyan Basin, India

Basu

Banerjee

Chakrabarti

2021

Lithos

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Evidence of lithosphere erosion in the Eastern Indian shield from multi-scale potential field modelling: geodynamic implications

Sathapathy,

Giri,

Radhakrishna

2024

Int J Earth Sci (Geol Rundsch)

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Characterization of Hydrocarbon Bearing Jardepahar Porcellanite Formation, Vindhyan Basin

Pandey,

Ojha

2024

Preprint

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The commercial gas discovery has been established form Paleo-proterozoic Jardepahar Formation of Son valley sector, Vindhayan Basin. The geochemical, sedimentological and source rock analysis of the cutting samples collected during the drilling of Hatta#D were carried out, to comprehend the nature of source rock, their petrological characteristic. The geochemical and electro-log signatures help us to divide the porcellanite of Jardepahar Formation in to three cherty dominated units and a dolomitic limestone unit. Similar observations have been registered from petrographic studies, the bottom units is massive chert layer, middle unit is banded chert (limestone bands) and the upper unit is again massive with the interbed of shale. The middle unit has drawn lead attention, due to hydrocarbon discovery, it consists of amorphous silica interbedded with limestone with along with carbonaceous matter and micro-nano scale fractures. Textural characteristics of clasts indicates very limited transportation. The middle unit shows, higher biological productivity and better hydrocarbon source facies as compared to the lower and upper units, which is gas bearing in Hatta field of Oil and Natural Gas Corporation (ONGC). The sediments were derived from high K felsic to intermediate volcanic source (s) from active continental margin, deposited in anoxic environment. The trace elements postulate absence of biogenic fractions and negligible amounts of chemical alteration. The middle unit has the source potential and also act as reservoir with the dolomitic limestone as top seal.

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Origin and evolution of the Vindhyan Basin: a geochemical perspective

Cited by 3 publications

References 16 publications

A combined geochemical, Nd, and stable Ca isotopic investigation of provenance, paleo-depositional setting and sub-basin connectivity of the Proterozoic Vindhyan Basin, India

A combined geochemical, Nd, and stable Ca isotopic investigation of provenance, paleo-depositional setting and sub-basin connectivity of the Proterozoic Vindhyan Basin, India

Evidence of lithosphere erosion in the Eastern Indian shield from multi-scale potential field modelling: geodynamic implications

Characterization of Hydrocarbon Bearing Jardepahar Porcellanite Formation, Vindhyan Basin

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