Composition of the peninsular India rivers average clay (PIRAC): A reference sediment composition for the upper crust from peninsular India

Babu, Shaik Sai; Ramana, R. Venkata; Rao, V. Purnachandra; Mohan, M. Ram; Krishna, A. Keshav; Sawant, S. S.; Satyasree, Nannapaneni

doi:10.1007/s12040-019-1301-8

Cited by 7 publications

(1 citation statement)

References 37 publications

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“…The sediment geochemistry of the east‐flowing rivers (Babu et al., 2021) and west‐flowing rivers of Peninsular India (Babu et al., 2023) also suggests the dominance of mafic to intermediate composition in the finer sediments (Ahmad & Singh, 2020). Further, the average clay composition of Peninsular India Rivers (known as PIRAC) also exhibits mafic to intermediate composition (Babu et al., 2020). All these studies suggest that the finer sediments from Peninsular rivers draining Archean Peninsular Gneisses and granulites are mafic to intermediate in composition.…”

Section: Implications In Deciphering Indian Ocean Sediment Provenancementioning

confidence: 99%

Geochemical Split Among the Suspended and Mud Sediments in the Nethravati River: Insights to Compositional Similarity of Peninsular Gneiss and the Deccan Basalt Derived Sediments, and Its Implications on Tracing the Provenance in the Indian Ocean

Gurumurthy

2024

Geochem Geophys Geosyst

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Major, trace, and rare earth element (REE) geochemistry of sediments from a tropical mountain river is investigated to understand the behavior of chemical elements during weathering and transportation in a Peninsular Gneissic terrain. The results from this study are compared with the Deccan Basalt‐derived River sediments and the eastern Arabian Sea sediments with an intent to highlight the challenges associated with the provenance determination of sediments along the continental margin of India. The geochemistry of suspended particulate matter (SPM) and mud sediments (<63 μm) of the Nethravati River indicate that sediments are derived from a relatively homogenous lithology, characterized by intermediate rocks of tonalitic (low‐Al TTGs) composition. The tectonic origin of the source rocks discriminated using sediment geochemistry suggests an ocean island arc origin. The sediments experience intense chemical weathering in the source region. The elemental composition and their inter‐element relationships suggest differential chemical weathering of mineral phases fractionate mafic components and their secondary mineral products in SPM, and mixed sources dominated by felsic components and their secondary mineral products in mud sediments. Intense chemical weathering induces significant geochemical splits among the suspended and mud sediments. The transport of mafic‐biased sediments from Peninsular India to Oceans, and the geochemical similarity with Deccan Basalt‐derived sediments makes it challenging to track the Peninsular Gneiss‐derived sediment provenance along the continental margin of India using conventional elemental geochemistry. The inferences from this study have important implications for determining the sediment provenance along the continental margin of India.

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Section: Implications In Deciphering Indian Ocean Sediment Provenancementioning

confidence: 99%

Geochemical Split Among the Suspended and Mud Sediments in the Nethravati River: Insights to Compositional Similarity of Peninsular Gneiss and the Deccan Basalt Derived Sediments, and Its Implications on Tracing the Provenance in the Indian Ocean

Gurumurthy

2024

Geochem Geophys Geosyst

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Mineralogy and geochemistry of the sediments in rivers along the east coast of India: Inferences on weathering and provenance

et al. 2021

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Composition of river sediments from Kerala, southwest India: Inferences on lateritic weathering

Babu,

Prajith,

Rao

et al. 2023

J Earth Syst Sci

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Composition of the peninsular India rivers average clay (PIRAC): A reference sediment composition for the upper crust from peninsular India

Cited by 7 publications

References 37 publications

Geochemical Split Among the Suspended and Mud Sediments in the Nethravati River: Insights to Compositional Similarity of Peninsular Gneiss and the Deccan Basalt Derived Sediments, and Its Implications on Tracing the Provenance in the Indian Ocean

Geochemical Split Among the Suspended and Mud Sediments in the Nethravati River: Insights to Compositional Similarity of Peninsular Gneiss and the Deccan Basalt Derived Sediments, and Its Implications on Tracing the Provenance in the Indian Ocean

Mineralogy and geochemistry of the sediments in rivers along the east coast of India: Inferences on weathering and provenance

Composition of river sediments from Kerala, southwest India: Inferences on lateritic weathering

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