Monazite ages from carbonatites and high-grade assemblages along the Kambam Fault (Southern Granulite Terrane, South India)

Catlos, Elizabeth J.; Dubey, C. S.; Sivasubramanian, P.

doi:10.2138/am.2008.2712

Cited by 26 publications

(10 citation statements)

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“…Also, Kumar et al [46] have given precise (MSWD 0.49) Rb-Sr isochron age of 767 Ma. Similarly, 715 Ma monazite ages from Kambam or Kambambettu carbonatite were also reported [50]. These data confirm late Proterozoic age for Sevathur to Kambambettu complex [50,51], which corresponds with a major alkaline activity in southern India.…”

Section: Carbonatites In Space and Timesupporting

confidence: 71%

“…Similarly, 715 Ma monazite ages from Kambam or Kambambettu carbonatite were also reported [50]. These data confirm late Proterozoic age for Sevathur to Kambambettu complex [50,51], which corresponds with a major alkaline activity in southern India. Next major carbonatitic magmatism in the subcontinent is reported from Eppawala carbonatite complex, which was related with the Pan-African orogeny at around 550 Ma [52,53].…”

Section: Carbonatites In Space and Timesupporting

confidence: 71%

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An Overview of the Carbonatites from the Indian Subcontinent

Randive

Meshram

2020

Open Geosciences

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AbstractCarbonatites are carbonate-rich rocks of igneous origin. They form the magmas of their own that are generated in the deep mantle by low degrees of partial melting of carbonated peridotite or eclogite source rocks. They are known to occur since the Archaean times till recent, the activity showing gradual increase from older to younger times. They are commonly associated with alkaline rocks and be genetically related with them. They often induce metasomatic alteration in the country rocks forming an aureole of fenitization around them. They are host for economically important mineral deposits including rare metals and REE. They are commonly associated with the continental rifts, but are also common in the orogenic belts; but not known to occur in the intra-plate regions. The carbonatites are known to occur all over the globe, majority of the occurrences located in Africa, Fenno-Scandinavia, Karelian-Kola, Mongolia, China, Australia, South America and India. In the Indian Subcontinent carbonatites occur in India, Pakistan, Afghanistan and Sri Lanka; but so far not known to occur in Nepal, Bhutan, Bangladesh and Myanmar. This paper takes an overview of the carbonatite occurrences in the Indian Subcontinent in the light of recent data. The localities being discussed in detail cover a considerable time range (>2400 Ma to <0.6 Ma) from India (Hogenakal, Newania, Sevathur, Sung Valley, Sarnu-Dandali and Mundwara, and Amba Dongar), Pakistan (Permian Koga and Tertiary Pehsawar Plain Alkaline Complex which includes Loe Shilman, Sillai Patti, Jambil and Jawar), Afghanistan (Khanneshin) and Sri Lanka (Eppawala). This review provide the comprehensive information about geochemical characteristics and evolution of carbonatites in Indian Subcontinent with respect to space and time.

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Section: Carbonatites In Space and Timesupporting

confidence: 71%

Section: Carbonatites In Space and Timesupporting

confidence: 71%

An Overview of the Carbonatites from the Indian Subcontinent

Randive

Meshram

2020

Open Geosciences

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“…The eastern part preserves a granulite-facies metamorphic event at w0.8e0.7 Ga ( Fig. 1; Santosh et al, 2003;Ghosh et al, 2004;Bhutani et al, 2007;Catlos et al, 2008;Teale et al, 2011). The w0.8e0.7 Ga event has not been reported from the western part of SGT.…”

Section: Southern Granulite Terrainmentioning

confidence: 93%

A geochemical perspective on charnockite magmatism in Peninsular India

Rajesh

2012

Geoscience Frontiers

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Large charnockite massifs occur in the high-grade Southern Granulite Terrain (SGT) and Eastern Ghats Belt (EGB) crustal provinces of Peninsular India. Available geochronological data indicate that the magmatism is episodic, associated with distinct orogenic cycles in the different crustal domains. The geochemical data also indicate a change in composition from trondhjemitic at w3.0e2.9 Ga to dominantly tonalitic at w2.6e2.5 Ga to tonalitic-granodiorite-granitic at w2.0e1.9 Ga to dominantly tonalitic at 1.7e1.6 Ga to quartz monzonitic or tonalitic at w1.0e0.9 Ga to granodiorite-granitic at w0.8e0.7 Ga. The trondhjemitic and tonalitic end members are metaluminous, magnesian and calcic to calc-alkalic, characteristic of magnesian group charnockites. The granodioritic to granitic end members are metaluminous to slightly peraluminous, ferroan and calc-alkalic to alkali-calcic, characteristic of ferroan group charnockites. The quartz monzonitic end members are metaluminous to peraluminous, magnesian to ferroan and calcic to calc-alkalic, neither characteristic of the magnesian group nor of the ferroan group of charnockites. Based on the occurrence and difference in composition of the charnockite massifs, it is suggested that the charnockite magmatism registers the crustal growth of the Indian plate on its southern (SGT) and eastern (EGB) sides, along active continental margins by accretion of arcs. ª 2012, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

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“…4) These results show that crystal fraction has played an important role in the formation of Proterozoic alkaline rocks. Bulk major oxides composition of Proterozoic carbonatite namely calciocarbonatite (n = 98), dolomitic carbonatite (n = 32), ferrocarbonatite (n = 19), silicocarbonatite (n = 30), and benstonite carbonatite (n = 4), compiled in study from various sources (Phadke and Jhingran, 1968;Subramanian et al, 1978;Sukheswala and Viladkar, 1978;Nair et al, 1984;Viladkar and Wimmenauer, 1986;Natarajan et al, 1994;Viladkar and Subramanian, 1995;Kumar et al, 1998;Pandit et al, 1998Pandit et al, , 2002Schleicher et al, 1998;Viladkar, 1998; Catlos et al, 2008;Vladykin et al, 2008;Chakrabarty and Sen, 2010;Ray et al, 2013;Renjith et al, 2016b;Ackerman et al, 2017), are presented in Fig. 5…”

Section: Diagram For Plutonic Igneous Rocks Show Different Alkaline Rmentioning

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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Monazite ages from carbonatites and high-grade assemblages along the Kambam Fault (Southern Granulite Terrane, South India)

Cited by 26 publications

References 86 publications

An Overview of the Carbonatites from the Indian Subcontinent

An Overview of the Carbonatites from the Indian Subcontinent

A geochemical perspective on charnockite magmatism in Peninsular India

Proterozoic Alkaline rocks and Carbonatites of Peninsular India: A review

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