Kimberlite, lamproite, ultramafic lamprophyre, and carbonatite relationships on the Dharwar Craton, India; an example from the Khaderpet pipe, a diamondiferous ultramafic with associated carbonatite intrusion

Smith, Christopher B.; Haggerty, Stephen E.; Chatterjee, Baijayanti; Beard, Andy; Townend, R.

doi:10.1016/j.lithos.2013.10.006

Cited by 50 publications

(19 citation statements)

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“…Mesoproterozoic alkaline, potassic, and ultrapotassic intrusive rocks of the Wajrakarur kimberlite field (WKF) occur over an area of ~7,000 km 2 in southern India. Rock types present include kimberlites, orangeites/olivine lamproites, lamprophyres, and carbonatites (e.g., Dongre, Chalapathi Rao, Viljoen, & Lehmann, ; Kaur & Mitchell, ; Smith, Haggerty, Chatterjee, Beard, & Townend, ). Earlier studies focused primarily on the kimberlites and other related rock types basically focusing on their mineralogy, geochemistry, geochronology, and petrogenesis.…”

Section: Introductionmentioning

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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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: Introductionmentioning

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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“…From the Indian front, there is still a paradox regarding the nomenclature of volatile-rich ultramafic intrusions in the EDC as kimberlite, lamproite or UML as they tend to display a transitional nature. One of the best examples is the Khaderpet plug from the Wajrakarur kimberlite field of the EDC, which is associated with the carbonatite intrusions (Smith et al, 2013). Following the mineralogical genetic classification, presence of Ti-andradite and significant amounts of carbonate content necessitates us to classify the Khaderpet KCR as ultramafic lamprophyre.…”

Section: Indian Lamprophyres and Their Relationship With The Kimberlimentioning

confidence: 99%

“…Following the mineralogical genetic classification, presence of Ti-andradite and significant amounts of carbonate content necessitates us to classify the Khaderpet KCR as ultramafic lamprophyre. However, high CaO and enrichment in LREE together with the low whole-rock MgO content suggest the Khaderpet KCR be transitional between kimberlite and ultramafic lamprophyre (Smith et al, 2013). The Arkhangelsk Alkaline Igneous Province (Russia) also has a similar association of kimberlite, olivine lamproite, melilite-bearing alkaline picrite and carbonatite showing transitional affinities to kimberlite and ultramafic lamprophyres (Mahotkin et al, 2000).…”

Section: Indian Lamprophyres and Their Relationship With The Kimberlimentioning

confidence: 99%

“…As stated before, kimberlites share many mineralogical similarities with the olivine lamproites which can be of overlapping nature. In this context, Indian kimberlites serve as the best representatives since many of them from Wajrakarur, and Narayanpet kimberlite fields from the EDC and diamondiferous Majhgawan pipe of central India are neither archetypal kimberlites nor lamproites (e.g., Haggerty and Birkett, 2004;Chalapathi Rao et al, 2005;Smith et al, 2013). Likewise, Reddy (1987) classified the ultramafic intrusions of the Wajrakarur kimberlite field to be lamproites considering the probable presence of leucite and sanidine.…”

Section: Indian Lamprophyres and Their Relationship With The Kimberlimentioning

confidence: 99%

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Lamprophyres from the Indian shield: A review of their occurrence, petrology, tectonomagmatic significance and relationship with the Kimberlites and related rocks

et al. 2020

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Lamprophyres are some of the oldest recognized alkaline rocks and have been studied for almost the last 150 years. Known for hosting economic minerals such as gold, diamond and base metals, they are also significant in our understanding of the deep-mantle processes (viz., mantle metasomatism and mantleplume-lithosphere interactions) as well as large-scale geodynamic processes (viz., subduction-tectonics, supercontinent amalgamation and break-up). The Indian shield is a collage of distinct cratonic blocks margined by the mobile belts and manifested by large igneous provinces (LIPs) such as the Deccan. A plethora of lamprophyres, varying in age from the Archaean to the Eocene, with diverse mineralogical and geochemical compositions, are recorded from the Indian shield and played a key role in clarifying the tectonic processes, especially during the Paleo-and Mesoproterozoic and the Late Cretaceous. A comprehensive review of the occurrence, petrology, geochemistry and origin of the Indian lamprophyres is provided here highlighting their tectonomagmatic significance. The relationship of the lamprophyres to the Kimberlite clan rocks (KCRs), focusing on the Indian examples, is also critically examined.

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“…The EDC hosts more than 150 kimberlite occurrences which are distributed in four distinct fields (e.g. Smith et al, 2013): (1) the diamondiferous southern Wajrakarur kimberlite field (WKF); (2) the barren northern Narayanpet kimberlite field (NKF); (3) the moderately diamondiferous central Raichur kimberlite field (RKF) and (4) Tungabhadra kimberlite field (TKF). These four fields are located towards the western margin of the Paleo-Mesoproterozoic Cuddapah sedimentary basin within a typical Archean granite-greenstone terrain comprising the Dharwar supracrustal schist belts and granitoids (Peninsular Gneissic Complex) (Fig.2).…”

Section: Geological Set Upmentioning

confidence: 99%

Role of trace element Pedogeochemistry in Diamond Exploration- A first Report from Lattavaram Kimberlite Cluster, Wajrakarur Field, Eastern Dharwar Craton, southern India

Pothuri¹

2018

Geochim. Bras.

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O entendimento das tendências na concentração de elementos traço selecionados em solos residuais em quatro chaminés de kimberlito diamantíferos conhecidos (3, 4, 8 e 9) que ocorrem em Lattavaram dentro do Campo de Kimberlite de Wajrakarur (WKF) é tentada pela primeira vez. As chaminés 3 e 4 estão expostas enquanto os 8 e 9 estão ocultas sob calcrete e colúvio. Para este propósito, elementos como Nb, Cr, Ni, Co, Zr, Mg, Sr e La são usados para entender suas concentrações nos solos quimberlíticos em comparação com solos graníticos considerados background. Observa-se que os solos nos tubos de kimberlito apresentam enriquecimento conspícuo de elementos como Cr, Co, Nb, Ni, Mg e Sr quando comparados aos solos de granitoides. No entanto, não há muita variação nos padrões de elementos La e Zr entre os solos kimberlíticos e do background. O pulso alto em elementos traço em solos é atribuído à presença de minerais kimberlíticos primários e seus produtos de intemperismo no solo. Este aspecto particular da pedogeoquímica é considerado útil como uma ferramenta de exploração em busca de kimberlitos em partes cratônicas do sul da Índia. Um enriquecimento do conteúdo de Nb até 45 ppm em solos residuais pode ser considerado anômalo nas partes do subcontinente indiano, o que precisa ser confirmado e levado adiante em conjunto com mapeamento geológico de alta resolução, geofísica seguida de perfuração para confirmação de kimberlito/ocorrência de lamproite

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Kimberlite, lamproite, ultramafic lamprophyre, and carbonatite relationships on the Dharwar Craton, India; an example from the Khaderpet pipe, a diamondiferous ultramafic with associated carbonatite intrusion

Cited by 50 publications

References 36 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

Lamprophyres from the Indian shield: A review of their occurrence, petrology, tectonomagmatic significance and relationship with the Kimberlites and related rocks

Role of trace element Pedogeochemistry in Diamond Exploration- A first Report from Lattavaram Kimberlite Cluster, Wajrakarur Field, Eastern Dharwar Craton, southern India

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