Mineralogy of the TK1 and TK4 ‘kimberlites’ in the Timmasamudram cluster, Wajrakarur Kimberlite Field, India: Implications for lamproite magmatism in a field of kimberlites and ultramafic lamprophyres

Shaikh, Azhar M.; Patel, Suresh C.; Ravi, S.; Behera, Duryadhan; Pruseth, Kamal Lochan

doi:10.1016/j.chemgeo.2016.10.030

Cited by 47 publications

(19 citation statements)

References 109 publications

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“…However, the potassic nature of lamprophyres in the present study (K 2 O/Na 2 O: 0.9–2.5) suggests that phlogopite in the mantle source is likely involved in magma generation (Figure b). In the case of the generation of kimberlites of the same area, the presence of an asthenospheric component in the magmas is favoured (Chalapathi Rao et al, ; Paton, Hergst, Phillips, Woodhead, & Shee, ; Paton, Hergt, Woodhead, Phillips, & Shee, ; Shaikh, Patel, Ravi, Behera, & Pruseth, ). Hence, the presence of garnet‐bearing lithospheric mantle enriched in LILE and depleted in Nb and Ta along with phlogopite‐bearing metasomes formed during past tectono‐magmatic events and its interaction with asthenosphere‐derived carbonated silicate melts is considered as a likely model for the generation of the SPL and the UKL lamprophyres.…”

Section: Discussionmentioning

confidence: 99%

“…Compositional field for kimberlites, orangeites, and lamproites are from Fraser, Hawkesworth, Erlank, Mitchell, and Scott-Smith (1985), Nowell et al (2004), and Tappe et al (2008) (Mitchell, 1995 The nature of the geodynamic event that has triggered small volume, mantle-derived alkaline magmatism in the Indian subcontinent at 1.1 Ga remains enigmatic. Intrusion of kimberlites in an extensional setting without involvement of mantle plume was suggested particularly for such rocks belonging to the Dharwar Craton (Shaikh et al, 2017;Sharma et al, 2018). However, Mesoproterozoic kimberlite, lamprophyre, and other related rock magmatism are widespread and present in other Rodinia counterparts representing a large igneous province at~1.1 Ga (Kumar, Heaman, & Manikyamba, 2007).…”

Section: Figure 11mentioning

confidence: 99%

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Petrogenesis of lamprophyres synchronous to kimberlites from the Wajrakarur kimberlite field: Implications for contrasting lithospheric mantle sources and geodynamic evolution of the eastern Dharwar Craton of southern India

et al. 2018

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Kimberlite field is an example of widespread Mesoproterozoic intracontinental magmatism. Recent studies have identified deep subcontinental lithospheric mantle as a source region of the kimberlite magmatism while timing, origin, and processes responsible for the generation of coeval lamprophyres remain poorly constrained. Here, we present and discuss new petrological and geochemical data for two lamprophyre dykes from the Wajrakarur kimberlite field and assess their petrogenetic relation to the kimberlite occurrences. Based on mineral compositional and whole‐rock geochemical characters, it is suggested that lamprophyres are formed through low degrees of partial melting of “enriched” lithospheric mantle that was modified and metasomatized by melts derived from recycled crust. This differs from geochemical imprints found in coeval kimberlites, where a crustal source component appears to be absent and is more consistent with rock derivation from “depleted” lithosphere which has experienced interaction with asthenosphere‐derived melts. An apparent lack of garnet in the mantle sources of lamprophyres is suggestive of melting at comparatively shallow depth (~100 km) relative to the kimberlites. Hence, these geochemically contrasting rocks, although have formed at the same time, are derived from vertically heterogeneous lithospheric mantle sources and can be explained through and linked with a thermal anomaly in the underlying convective asthenosphere. We suggest that the deeper mantle source region of the kimberlites was more pristine and devoid of subduction‐related signatures, whereas the shallower mantle source region of the lamprophyres seems to have preserved imprints of plate convergence and subduction associated with the evolution of the Dharwar Craton.

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Section: Discussionmentioning

confidence: 99%

Section: Figure 11mentioning

confidence: 99%

Petrogenesis of lamprophyres synchronous to kimberlites from the Wajrakarur kimberlite field: Implications for contrasting lithospheric mantle sources and geodynamic evolution of the eastern Dharwar Craton of southern India

et al. 2018

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“…Ti-Na/K (expressed as a.p.f.u.) variations in amphibole compositions in lamprophyres of Chompolo field, calc-alkaline (CA) and shoshonitic lamprophyres [59][60][61][62][63], cratonic [5,[64][65][66][67][68][69][70][71][72] and orogenic lamproites [73][74][75][76] (b). Minette, lamproite and mica-amphibole-rutile-ilmenite-diopside (MARID) fields modified from [54].…”

Section: Garnetsmentioning

confidence: 99%

40Ar/39Ar Geochronology and New Mineralogical and Geochemical Data from Lamprophyres of Chompolo Field (South Yakutia, Russia)

et al. 2020

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The alkaline igneous rocks of the Chompolo field (Aldan shield, Siberian craton), previously defined as kimberlites or lamproites, are more correctly classified as low-Ti lamprophyres. The emplacement age of the Ogonek pipe (137.8 ± 1.2 Ma) and the Aldanskaya dike (157.0 ± 1.6 Ma) was obtained using 40Ar/39Ar K-richterite dating. The Chompolo rocks contain abundant xenocrysts of mantle minerals (chromium-rich pyropic garnets, Cr-diopsides, spinels, etc.). The composition of the mantle xenocrysts indicates the predominance of spinel and garnet–spinel lherzolites, while the presence of garnet lherzolites, dunites, harzburgites, and eclogites is minor. The Chompolo rocks are characterized by large-ion lithophile element (LILE) and Light Rare Earth Element (LREE) enrichments, and high field strength element (HFSE) depletions. The rocks of the Ogonek pipe have radiogenic Sr (87Sr/86Sr (t) = 0.70775 and 0.70954), and highly unradiogenic εNd(t) (−20.03 and −20.44) isotopic composition. The trace element and isotopic characteristics of the Chompolo rocks are indicative of the involvement of subducted materials in their ancient enriched lithospheric mantle source. The Chompolo rocks were formed at the stage when the Mesozoic igneous activity was triggered by global tectonic events. The Chompolo field of alkaline magmatism is one of the few available geological objects, which provides the opportunity to investigate the subcontinental lithospheric mantle beneath the south part of the Siberian craton.

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“…Wide variation in oxygen fugacity, as inferred from the perovskite oxybarometry, suggests a non-diamond prospective nature of the pipe. Shaikh et al (2017) have presented detailed mineral chemistry of the Late Cretaceous macrocrystic kimberlite and Mesoproterozoic aphanitic kimberlite pulse in the TK-4 pipe of the Timmasamudram cluster, Wajrakarur kimberlite field. They showed that these kimberlites are rich in Al-Na-poor diopside and phlogopite set in the groundmass of diopside, phlogopite, spinel, perovskite and apatite.…”

Section: Kimberlitesmentioning

confidence: 99%

Kimberlites, lamproites and lamprophyres from the Indian shield: Highlights of researches during 2016-2019

Rao¹,

Giri²,

Pandey³

2020

PINSA

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Highlights of researches on kimberlites, lamproites and lamprophyres (and their entrained xenoliths) during 2016-2019 from the Indian context are presented. A few previously unknown occurrences have been brought to light, and a wealth of petrological, geochemical and isotopic data on these rocks became available. All these studies provided new insights into the nomenclatural as well as geodynamic aspects such as subduction-tectonics, mantle metasomatism, lithospheric thickness, supercontinent amalgamation, and break-up and nature of the sub-continental lithospheric mantle from the Indian shield.

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Mineralogy of the TK1 and TK4 ‘kimberlites’ in the Timmasamudram cluster, Wajrakarur Kimberlite Field, India: Implications for lamproite magmatism in a field of kimberlites and ultramafic lamprophyres

Cited by 47 publications

References 109 publications

Petrogenesis of lamprophyres synchronous to kimberlites from the Wajrakarur kimberlite field: Implications for contrasting lithospheric mantle sources and geodynamic evolution of the eastern Dharwar Craton of southern India

Petrogenesis of lamprophyres synchronous to kimberlites from the Wajrakarur kimberlite field: Implications for contrasting lithospheric mantle sources and geodynamic evolution of the eastern Dharwar Craton of southern India

40Ar/39Ar Geochronology and New Mineralogical and Geochemical Data from Lamprophyres of Chompolo Field (South Yakutia, Russia)

Kimberlites, lamproites and lamprophyres from the Indian shield: Highlights of researches during 2016-2019

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