Mesoproterozoic surface process, weathering condition and climate: an insight from siliciclastic sedimentary rocks of the Badami group, Karnataka India

Hegde, V. S.; Sreenivas, B.; Havannavar, Girish; Hanamgond, P. T.; Pratihari, Asim Ranjan; Hulaji, Shivani; Shalini, G.

doi:10.1007/s43217-022-00109-3

Cited by 2 publications

(2 citation statements)

References 74 publications

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“…The west-to-east variation in sediment maturity reflects a complex interaction of geological factors and suggests the coexistence of distinct tectonic environments in the same region. This observation aligns with the interpretations of [45] [46] [47], and [48]. Understanding how sediments could originate from two distinct tectonic environments within the same area remains a geological challenge.…”

Section: Discussionsupporting

confidence: 89%

Geochemical Exploration of Sediments in the Toumodi Region: Origin of Metasediments, Geological Dynamics, and Perspectives for Regional Geological History

Tegan,

Kouamelan,

Yao

et al. 2023

OJG

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The region of Toumodi, located in the heart of the West African Craton, is renowned for its geological complexity. This geochemical study delves into the origin of siliciclastic sediments and the geodynamic context of their formation. The study reveals that Toumodi's sediments exhibit an intriguing mineralogical composition, with indications of a dual source of parent rocks, one rich in quartz and the other poor in quartz. Furthermore, geochemical analysis highlights a variation in sediment maturity from west to east, indicating the coexistence of distinct geotectonic environments in the region. In the eastern part of the Toumodi region, a passive margin is defined characterized by sediments with an abundance of quartz, while to the west, an active margin is observed with sediments having a lower quartz content. This arrangement suggests the presence of a potential suture zone in the region. This geological complexity underscores the importance of further research to better understand the origin of sediments and the processes that have shaped them. Moreover, this study sheds new light on the fascinating geology of Toumodi, but many questions remain to be explored.

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Section: Discussionsupporting

confidence: 89%

Geochemical Exploration of Sediments in the Toumodi Region: Origin of Metasediments, Geological Dynamics, and Perspectives for Regional Geological History

Tegan,

Kouamelan,

Yao

et al. 2023

OJG

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“…The composition of sedimentary rocks has proved to be a useful tool in understanding the provenance, sedimentation history, and nature of the crust that supplied the detritus (Bhatia & Crook, 1986; Dickinson, 1985; Hedge et al, 2022; Hedge & Chavadi, 2009; Roser & Korsch, 1988; Wronkiewicz & Condie, 1987). However, the composition of clastic sedimentary rocks can be altered, especially in very ancient strata, such as those deposited during the Archaean (Garzanti & Resentini, 2016; Hedge & Chavadi, 2009; Taylor & McLennan, 1995).…”

Section: Introductionmentioning

confidence: 99%

Provenance of the conglomerate and siliciclastic rocks from the Gadag Greenstone Belt, Western Dharwar Craton, India: Implications for understanding Neoarchean basin margin sedimentation

et al. 2023

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whole-rock geochemical and geochronological analysis of polymictic conglomerate, associated siltstone and greywacke in the Neoarchean Gadag Greenstone Belt in the Western Dharwar Craton, India, provides new insights into sedimentary provenance and tectonic setting. The polymictic conglomerate contains granitic, gneissic, felsic and mafic volcanic, quartzite and banded ferruginous chert clasts within a quartzofeldspathic matrix. Framework grains in the siltstone and greywacke are quartz, feldspar with rock fragments, embedded in a chlorite-dominant matrix. The chemical index of alteration values ($70) and A-CN-K plot for the rocks suggest a low-to-moderate degree of weathering. Rare earth element (REE) patterns show moderate fractionation (La N /Yb N $ 12.31) with a weak negative europium anomaly (0.82). Enrichment in transition elements (Ni, Cr, Co, Sc) and depletion in high-field-strength elements, as well as relatively low La/Co (0.62), moderate to high Th/Yb (3.06), La/Th (5.16), La/Yb (17.5), and La/Sc ($2.37) ratios, suggest a mixed felsic-mafic provenance. U-Pb dating of detrital zircon from the conglomerate and greywacke revealed major age peaks at ca. (3.2, 2.9, 2.8, 2.6, 2.5 Ga) and a maximum age of deposition of 2,508 ± 26 Ma, 2,493 ± 20 Ma, respectively. The above data suggest low to moderately weathered proximal sources for both conglomerate and greywacke, indicating that these two rock types were not deposited simultaneously, but rather separately. The association of these conglomerates and greywacke with continental arc-related volcanics indicates the closing of an arc at the time of sedimentation. Complex provenance consisting of recycled and magmatic arc during basin closure confirm the notion of modern style plate tectonics operating during Neoarchaean.

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Mesoproterozoic surface process, weathering condition and climate: an insight from siliciclastic sedimentary rocks of the Badami group, Karnataka India

Cited by 2 publications

References 74 publications

Geochemical Exploration of Sediments in the Toumodi Region: Origin of Metasediments, Geological Dynamics, and Perspectives for Regional Geological History

Geochemical Exploration of Sediments in the Toumodi Region: Origin of Metasediments, Geological Dynamics, and Perspectives for Regional Geological History

Provenance of the conglomerate and siliciclastic rocks from the Gadag Greenstone Belt, Western Dharwar Craton, India: Implications for understanding Neoarchean basin margin sedimentation

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