Petrology, 40Ar/39Ar age, Sr-Nd isotope systematics, and geodynamic significance of an ultrapotassic (lamproitic) dyke with affinities to kamafugite from the easternmost margin of the Bastar Craton, India

Rao, N. V. Chalapathi; Atiullah,; Burgess, R.; Nanda, Purnendu; Choudhary, Amol; Sahoo, Samarendra; Lehmann, Bernd; Chahong, Ngazipmi

doi:10.1007/s00710-015-0403-5

Cited by 16 publications

(4 citation statements)

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“…This transitional area actually represents the suture of an ancient continent–continent collision and is thus tectonic in nature (Bhadra et al, 2004 and references therein). The nearest well‐studied Mesoproterozoic Lakhna mafic dykes have revealed subduction‐originated calc‐alkaline magmatism in an active continental margin setting (Pisarevsky et al, 2013) while lamproites reveal an anorogenic setting (Chalapathi et al, 2015). Based on geochemistry and isotope data of the Mesoproterozoic Sakri lamproite, Chalapathi Rao et al (2015) have demonstrated an enriched mantle source displaying long‐term incompatible element enrichment from this transitional area between the craton and mobile belt.…”

Section: Discussionmentioning

confidence: 99%

“…Spatial occurrences of mafic dykes and lamprophyre are separated by an aerial distance of more than 21 km. Spatially close Mesoproterozoic Lakhna dykes have been dated as 1,450 ± 22 Ma by U–Pb SHRIMP zircon ages Ga differ by 400–800 Ma from the closest alkaline magmatic event (Nuapada or Sakri; Chalapathi et al, 2015; Santosh et al, 2018). Nuapada lamproites have been dated as 2,221 ± 50 Ma by zircon Pb 207 ‐Pb 206 while 1,045 ± 9 Ma by whole rock Ar 40 ‐Ar 39 ages were reported for Sakri Lamproites (op.…”

Section: Discussionmentioning

confidence: 99%

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Origin and evolution of vanadium‐rich oxide and titanite phases in lamprophyre and mafic dykes from the Nuapada diamondiferous Lamproite field, BastarCraton‐EasternGhats Mobile belt contact, India: Metallogenic and geodynamic implications

2023

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Transitional boundaries of the craton and mobile belt mark diverse and long-term tectono-thermal events like hot and cold lithospheric contact, back-arc-type subduction, and also constitute a favourable locale for metallogeny. The exact nature and origin of such metallogenic enrichment in the lithospheric mantle source beneath contact zones are still uncertain. The contact of Bastar Craton and the Eastern Ghat Mobile Belt (EGMB), India, provides an ideal geological setup to study the metallogenic enrichment processes. In this study, we present a detailed petrographic and mineralogical investigation of various iron oxide phases and titanites in spatially and temporally distinct lamprophyre and mafic dykes from the diamondiferous Nuapada Lamproite Field (NLF) at the contact between Bastar Craton and EGMB. Diverse textural assemblages of oxides, namely, trellis, sandwich-type exsolutions and reaction-replacement, are widespread. Ilmenites, magnetites and titanites from the mafic dykes as well as lamprophyre exhibit an anomalous enrichment of vanadium (V 2 O 3 up to 3.7 wt%), whereas ilmenites are also characterized by their elevated manganese content (MnO up to 3.8 wt%). Mineral chemistry-based plots and thermo-oximetric studies suggest the magmatic origin of iron oxides belonging to the Fe-Ti-V-type ore in which partitioning and sequestration of the elements were controlled by differential crystallization, exsolution and fractionation rather than any imprints of contamination. Multiphase sequestration of vanadium as well as manganese in lamprophyre and mafic dykes, separated in space as well in relative depths of origin, signifies the presence of a fertile mantle. The role of subductionderived metasomatized fluids as a causative factor of vanadium metallogeny in this domain is evaluated. Low-Mg and high-Mn ilmenites of this study are consistent with the reported occurrences of diamonds from the NLF and adjoining areas of the Bastar Craton.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Origin and evolution of vanadium‐rich oxide and titanite phases in lamprophyre and mafic dykes from the Nuapada diamondiferous Lamproite field, BastarCraton‐EasternGhats Mobile belt contact, India: Metallogenic and geodynamic implications

2023

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“…2.4-2.5 Ga Dantewara LIP event (Samal et al, 2019a). Chalapathi Rao et al (2016) have reported 40 Ar/ 39 Ar whole-rock age of 1045±9 Ma for a lamproite intrusion, which is thought to be related with the widespread alkaline and mafic magmatism of the Indian Shield ~1.05-1.11 Ga (cf. Samal et al, 2019a,b).…”

Section: Geochronologymentioning

confidence: 99%

Spatial and Temporal Distribution of Large Igneous Provinces in the Indian Shield – Highlights of Recent Investigations

Srivastava¹,

Samal²,

Ernst³

et al. 2020

PINSA

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This report highlights investigations since 2016 on the Large Igneous Provinces (LIPs), particularly based on their mafic dyke swarms (MDSs) and continental flood basalts (CFBs), from the Indian Shield. Recent research, particularly geochemistry, geochronology and paleomagnetism, allow identification and characterization of distinct generations of LIPs in space and time in the Indian Shield. This could be the basis for critical new tests of paleogeographic reconstructions of supercontinents and paleocontinents of the Earth's history and the position of India in different ancient supercontinent/supercratons. The high-quality data generated in recent years also helped significantly to understand the nature, composition and evolution of the sub-continental lithospheric mantle beneath the Indian Shield, which aims at resolving important geological aspects, such as the role of plume tectonics, ancient subduction events, extent of the LIPs paleo-supercontinent reconstructions, etc., and has received considerable national and international attention.

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“…Chalapathi Rao et al, 2013a) and lamproites (e.g. Chalapathi Rao et al, 2016) intrusions. In this communication, an attempt has been made to provide a comprehensive appraisal on petrological, geochemical, geochronological and isotopic characteristics of the early Cretaceous alkaline/ultra-alkaline-carbonatite magmatism recorded in the Indian Shield (exclusively in eastern and northeastern regions) to understand their genetic aspects.…”

Section: Introductionmentioning

confidence: 99%

Early Cretaceous alkaline/ultra-alkaline silicate and carbonatite magmatism in the Indian Shield – a review: implications for a possible remnant of the Greater Kerguelen Large Igneous Province

Srivastava

2020

Episodes

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The early alkaline/ultraalkaline silicate and carbonatite magmatism, exclusively recorded in the Chhotanagpur Gneissic Complex and the Shillong Plateau-Mikir Hills in the eastern/northeastern regions of the Indian Shield, have been reviewed to understand their genetic aspects. These are thought to be associated to the Kerguelen hot spot, active in this region during ca. 118-100 Ma. The existing geochemical, geochronological and isotopic data do not support any definite emplacement order for these diverse groups of magmatic suites. It is likely that they were derived from distinct magma batches with direct or indirect involvement of the Kerguelen plume. The available data suggest their possible derivation from the depleted asthenosphere/lithosphere with negligible contribution from the Kerguelen mantle plume. It is likely that mantle plume provided additional heat necessary to melt the asthenosphere/lithosphere. These data also suggest effects of low-pressure crustal contamination, crystal accumulation and fractional crystallization, rather than mantle-derived heterogeneity. These identified magmatic events together with other known magmatic events such as southeastern Tibet, Abor volcanics, SW Australia and eastern Antarctica during ca. 140-100 Ma could be related to the Kerguelen plume and integral part of the Greater Kerguelen Large Igneous Province, and have possible impact on the breakup of East Gondwanaland.

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Petrology, 40Ar/39Ar age, Sr-Nd isotope systematics, and geodynamic significance of an ultrapotassic (lamproitic) dyke with affinities to kamafugite from the easternmost margin of the Bastar Craton, India

Cited by 16 publications

References 104 publications

Origin and evolution of vanadium‐rich oxide and titanite phases in lamprophyre and mafic dykes from the Nuapada diamondiferous Lamproite field, BastarCraton‐EasternGhats Mobile belt contact, India: Metallogenic and geodynamic implications

Origin and evolution of vanadium‐rich oxide and titanite phases in lamprophyre and mafic dykes from the Nuapada diamondiferous Lamproite field, BastarCraton‐EasternGhats Mobile belt contact, India: Metallogenic and geodynamic implications

Spatial and Temporal Distribution of Large Igneous Provinces in the Indian Shield – Highlights of Recent Investigations

Early Cretaceous alkaline/ultra-alkaline silicate and carbonatite magmatism in the Indian Shield – a review: implications for a possible remnant of the Greater Kerguelen Large Igneous Province

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