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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Korra Rakesh posted an Question
October 25, 2020 • 19:29 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir , please explain briefly about carbonatite rock ? means totally about geological characteristics, mineral assemblage/texture/major element/trace element/ree
sir , please explain briefly about carbonatite rock ? means totally about geological characteristics, mineral assemblage/texture/major element/trace element/REE/Istope geochemistry and orgin
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Veer vikram singh![best-answer]()
Carbonatite is a type of igneous rocks characterised by mineralogic composition consisting of greater than 50% carbonate minerals. They are almost exclusively associated with continental rift-related tectonic setting. Carbonatites may be intrusive (coarse grained) or extrusive (fine grained). Three models of their formation exist: 1. Direct generation by very low-degree partial melts in the mantle and melt differentiation 2. Liquid immiscibility between a carbonate melt and a silicate melt, 3. Extreme crystal fractionation Major elements are Na, Ca, Mg, C, O and trace elements are REE