Nature of the northern Indian plate margin during the assembly of supercontinent Columbia: was it a part of a double subduction?

Phukon, Purbajyoti

doi:10.1016/j.earscirev.2022.104185

Cited by 11 publications

(1 citation statement)

References 117 publications

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“…It concludes with a cartoon model depicting dyke emplacement within a compressional orogeny, where double subduction of the Central Indian oceanic plates between Bundelkhand, Aravalli, Bastar and Singhbhum along CITZ (Phukon, 2022) triggered hydration of the subcontinental lithospheric mantle and subsequent magmatism.…”

Section: Spatial and Temporal Significancementioning

confidence: 98%

Proterozoic mafic dyke swarms of Bundelkhand Craton, North India: A connection to Columbia supercontinent

Raju,

Bodas,

Anshu

et al. 2024

Geological Journal

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The present paper addresses petrography, geochemistry and Ar‐Ar geochronology of a significant number of mafic dykes from the Paleo‐ to Neoarchean Bundelkhand Craton in central India. The majority of the dykes are NW‐SE oriented (with a few NE‐SW and ENE‐WSW) with tholeiitic, sub‐alkaline and basalt to basaltic andesite composition. The trace element geochemistry of these dykes indicates an island arc setting during emplacement. The Ar‐Ar mineral dating (plagioclase) of three representative dykes reveals an emplacement age between 1.53 and 1.46 Ga. This finding and earlier reports (2.1–1.73 Ga) point to sustained mafic magmatism throughout the Bundelkhand Craton in a preferred structural orientation between 2.1 and 1.46 Ga. Mafic magmatism was episodic and can be linked to the perpetual subduction accretion processes between the central Indian Archean continents during the development of the Columbia supercontinent. The mafic dykes were emplaced at 45° to the maximum compression direction (E‐W), that is, along the line of no finite longitudinal strain. This time equivalent widespread NW‐SE and NE‐SW trending mafic dyke system is also relatable along the adjacent continents (Singhbhum, Bastar) and thus opened up a new paradigm for the dyke's emplacement across the Indian cratons.

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Section: Spatial and Temporal Significancementioning

confidence: 98%

Proterozoic mafic dyke swarms of Bundelkhand Craton, North India: A connection to Columbia supercontinent

Raju,

Bodas,

Anshu

et al. 2024

Geological Journal

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Cambro-Ordovician metamorphism from Lesser Himachal Himalaya and its implication for Gondwana assembly

Hifzurrahman,

Nasipuri,

Ganaie

et al. 2024

Miner Petrol

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Origin and Tectonic Implications of I-type Granites, North Delhi Fold Belt, NW, India: Insights from Whole Rock Geochemistry and Mineral Compositions

Kanyan,

Kumar,

Rana

et al. 2023

Journal of the Geological Society of India

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A comprehensive whole-rock geochemical and mineral chemistry study was carried out of granites from the Narnaul and surrounding isolated hills of North Delhi Mobile Belt, NW India to constrain their genesis, and tectonic environment. The distinctive features of granites are meta to peraluminous nature and decreasing trend of P2O5 with high SiO2 (>71%) ascribed to its metaigneous origin. In detail the chemical diversity of the studied samples is reflected by their affinity to Calc-alkaline to shoshonite series with high K2O/Na2O (mostly>1), low MgO (< 0.11%) and variation in Mg# (upto 0.5) and maficity with increasing SiO2. The positive Eu anomalies, high LILE, highly enriched LREE (La/Sm = 4.13–19.33) pattern and comparatively elevated concentrations of Cs, La, Ta, Dy, Zr, Pb and Yb suggest different episodes of magmatic differentiation. Our data indicate that melting of older subduction-related igneous rocks and the underwent fractional crystallization in hydrous conditions is the possible mechanism for the generation of I-type granites in collisional tectonic setting.

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Nature of the northern Indian plate margin during the assembly of supercontinent Columbia: was it a part of a double subduction?

Cited by 11 publications

References 117 publications

Proterozoic mafic dyke swarms of Bundelkhand Craton, North India: A connection to Columbia supercontinent

Proterozoic mafic dyke swarms of Bundelkhand Craton, North India: A connection to Columbia supercontinent

Cambro-Ordovician metamorphism from Lesser Himachal Himalaya and its implication for Gondwana assembly

Origin and Tectonic Implications of I-type Granites, North Delhi Fold Belt, NW, India: Insights from Whole Rock Geochemistry and Mineral Compositions

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