Age and geochemistry of the Newania dolomite carbonatites, India: implications for the source of primary carbonatite magma

Ray, Jyotisankar; Pande, Kanchan; Bhutani, Rajneesh; Shukla, A. D.; Vinai, K.; Kumar, Alok; Awasthi, Neeraj; Smitha, R. S.; Panda, D.

doi:10.1007/s00410-013-0945-7

Cited by 38 publications

(35 citation statements)

References 56 publications

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“…Although, carbonatites do not contain alkali-rich phases such as nepheline, these silica deficient (mostly SiO 2 <10%) rocks are also generally considered with alkaline rocks by virtue of their close association in the field, and normally referred to as alkaline rocks and carbonatites or ARCs (Woolley, 2001;Burke et al, 2003). However, some carbonatite occurrences show no association with the alkaline rocks, e.g., Newania complex in India (Ray et al, 2013). Note that the carbonatite is volumetrically insignificant to the associated alkaline rocks (Ashwal et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Proterozoic Alkaline rocks and Carbonatites of Peninsular India: A review

2020

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African orogeny events. Whereas clinopyroxene, amphibole, titanite and apatite fractionation seems to have affected the nephelinite, nepheline syenite and syenite, carbonatite is affected by fractionation of calcite, dolomite, ankerite, pyroxene, apatite, magnetite, mica, and pyrochlore. Trace elements and Sr-Nd-Pb-C-O isotopic compositions of these ARCs strongly suggest a subcontinental lithospheric mantle source, that is enriched either by distribution of subducted crustal material or by metasomatism of mantle-derived fluids, for the generation of ARCs. Despite some isotopic variability that can result from crustal contamination, a trend showing enrichment in 87 Sr/ 86 Sr i (0.702 to 0.708) and depletion in ε Nd(i) (-1.3 to -14.1) over a 2 Gyr duration indicates temporal changes in the lithospheric/ asthenospheric source of ARCs, due to periodic enrichment of the source by mantle-derived fluids. ARC generation starts in an intracontinental rift setting (beginning of Wilson cycle). These early-formed ARCs are carriedto 100 km depths during continental collision (termination stage of Wilson cycle) and undergo extensive

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Section: Introductionmentioning

confidence: 99%

Proterozoic Alkaline rocks and Carbonatites of Peninsular India: A review

2020

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“…The southern Indian complexes and Newania of Rajasthan are Proterozoic (2500-750 Ma; Table 1); the northeastern and northwestern complexes are Cretaceous (110-65 Ma; Table 1). New age data suggest that Newania carbonatite was emplaced at 1473 Ma and was affected by a thermal event at 904 Ma (Ray et al, 2013), and these results contradict the earlier suggestion from Pb-Pb ages that the complex had seen recurring carbonatite activities at 2270 Ma and 1550 Ma (Schleicher et al, 1997). However, the pre-Deccan alkaline-carbonatite complexes of Mundwara and Sarnu Dandali clearly had multiple activities during 110-66 Ma (Pande et al, 2017;Sheth et al, 2017), a finding that would likely to change our view on the LIP/CFB-carbonatite connection.…”

Section: Ages Of Carbonatites Emplacementsmentioning

confidence: 99%

“…All the southern Indian carbonatites, i.e., Hogenakal, Sevattur, Samalpatti, Jogipatti, Pakkandau, Kambamettu, and one north Indian complex, i.e., Newania, were emplaced at various times during the Proterozoic and most complexes show effects of one/ multiple post-magmatic thermal histories (e.g., Renjith et al, 2016;Ray et al, 2013). All these complexes are located within the Southern Granulite Terrain (SGT) and are associated with major fracture zones (Fig.…”

Section: Proterozoic Carbonatitesmentioning

confidence: 99%

“…The only north Indian Proterozoic carbonatite is Newania, which happens to be a pure dolomite carbonatite complex that has no alkaline silicate rocks. Using multiple geochemical (major-trace elements and isotopic techniques (C-O-Sr-Nd-Pb) Ray et al (2013) established that the primary magma for the complex was a magnesio-carbonatite melt and that it was derived from a carbonate bearing mantle. This work also suggested that the source was a phlogopite bearing, metasomatized continental lithospheric mantle, which was located within the garnet stability zone.…”

Section: Proterozoic Carbonatitesmentioning

confidence: 99%

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Recent advancement in studies of Deccan traps and its basement; Carbonatites and Kimberlites - An Indian Perspective in last five years

Ray¹,

Parthasarathy²

2018

Proceedings of the Indian National Science Academy

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We made an attempt to provide a status report on volcanic rocks and mantle derived rocks with a special focus on studies related to Deccan flood basalt, carbonatites and kimberlites from India, during last five years. The important problems related to the Deccan volcanism include 1. Origin of Deccan Trap whether plume related or impact induced or triggered volcanism (2) the details of composition, the internal structure and age distribution and (3) the relation between the large igneous provinces and major mass extinction. Carbonatites are mantle derived rocks, which are helpful in modelling the Earth's interior. They vary in age from Archean to recent, and are found mostly on continents and thus provide valuable information about the evolution of the sub-continental mantle through time. This article also reviews most of the research contributions on Indian carbonatites of the last five years. Building on existing information on their modes of occurrences, field dispositions, chronology, petrology and geochemistry, we use the recent data to provide a comprehensive view on the origin and evolution of these carbonatites.(Mw 6.3). Recently Gupta (2017) has edited a comprehensive collection of 25 original articles covering different geophysical aspects of Koyna Earthquake (Gupta 2017 and the references therein). In this article we provide a brief review of the work carried out in Deccan Volcanic Province near Killari region, which is equally important for the stable continental earth quake and geodynamic understanding. To study the seismotectonics of this earthquake-prone province in general and Killari earthquake region in particular, several boreholes were drilled in and around epicentral area. It included 617 m deep KLR-1 borehole, drilled 80 m south of surface scarp on the hanging wall near the Killari village (18°03'07"N, 76°33'20"E). It penetrated 338 m thick basalt flows, followed by 8 m of infratrappean sediments and a further 270 m of the Neoarchean crystalline basement.Detailed geoscientific studies (including seismic, elastic and petrophysical studies) on the representative

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“…New age data reveal that the complex was emplaced at ~1,473 Ma and parts of it were affected by a thermal event at ~904 Ma (Ray et al, 2013). The Sr-Nd isotopic data suggest that the primary magma originated from a metasomatized lithospheric mantle whereas the trace element modeling suggests that the source was a phlogopite bearing mantle, located within the garnet stability zone (Ray et al, 2013). In the end-Cretaceous Amba Dongar sub-volcanic complex, nephelinite plugs and dikes of phonolites were emplaced before the carbonatites.…”

Section: Carbonatites and Alkaline Rocksmentioning

confidence: 99%

Kimberlites, Lamproites, Lamprophyres, Carbonatites, other Alkaline Rocks, and Mafic Dykes from the Indian Shield: Glimpses of Research (2012-2016)

Rao

Srivastava²

2016

Proceedings of the Indian National Science Academy

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Major highlights of researches carried out on kimberlites, lamproites, lamprophyres, carbonatites, other alkaline rocks and mafic dykes from the Indian shield during 2012-2016 are presented. New findings involving field mapping, petrology, geochemistry (including high quality mineral based in situ isotopic studies) and geophysics have provided remarkable insights on the mode of their occurrence, timing of emplacement, mineralogy and bulk-rock composition, redox conditions, relative contribution of the lithosphere and asthenosphere, as well as their economic potential. Several large-scale geodynamic aspects such as plume-lithosphere interactions, ancient subduction events, layered structure of the sub-continental lithospheric mantle, spatial extent of the Precambrian large igneous provinces and supercontinent configurations could be unraveled from these studies on deep-mantle derived small-volume magmatic rocks.

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Age and geochemistry of the Newania dolomite carbonatites, India: implications for the source of primary carbonatite magma

Cited by 38 publications

References 56 publications

Proterozoic Alkaline rocks and Carbonatites of Peninsular India: A review

Proterozoic Alkaline rocks and Carbonatites of Peninsular India: A review

Recent advancement in studies of Deccan traps and its basement; Carbonatites and Kimberlites - An Indian Perspective in last five years

Kimberlites, Lamproites, Lamprophyres, Carbonatites, other Alkaline Rocks, and Mafic Dykes from the Indian Shield: Glimpses of Research (2012-2016)

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