![]() The associated peraluminous high-K calc-alkaline pink granites exhibit features similar to highly evolved S-type granites as evidenced by their highly fractionated and differentiated (DI: 80–91) nature. They also show significant enrichment of Cu, Ni, Zn, V and Y as compared to non-radioactive lamprophyre. However, radioactive lamprophyres have significantly low CaO content (~1.4%). ![]() Petrochemically, they show ultrabasic basanitic composition and sodi-potassic nature similar to alkaline lamprophyres (AL) and can be classified as ‘camptonite’. These lamprophyres have shown anomalous uranium contents (upto 0.116% U3O8) along the highly ferruginised and fractured contact zones with Erinpura granites. They display a new assemblage of lamprophyres with Neoproterozoic Erinpura granites near Andor in Sirohi district. Southern part of Rajasthan, well known for lamprophyre intrusives associated with Ajabgarh supracrustals of South Delhi Fold Belt (SDFB) and alkaline complexes.
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