Abstract
A synthesis of available data on REE concentrations in peralkaline granites of India is presented. Although peralkaline granite-hosted REE deposits are known world over, and one such deposit has also been mined actively in Kola Peninsula of Russia, but in India such deposits have not yet been established. Initial results of investigations reveal that peralkaline fine-grained granite and microgranite dykes occurring essentially in the form of dykes of various dimensions associated with Siwana Ring Complex in western Rajasthan are potential for hosting substantial resources of REE and other associated high-field strength elements like Zr and Nb. The most conspicuous feature of the mineralisation is the large enrichment of HREE rendering a low LREE:HREE ratio of 60:40. Various areas where appreciable REE concentrations are reported include Gudanal, Nal, Bhatikhera, Meli, Phulan, and Dantala in the Siwana ring structure. Significant concentrations of REE have also been reported from Mamaji-ka-Wala, Mailawas, Ludhrara, Ramaniya, Mawri, Sheetla Mata, Mokalsar, Sarnu Dandali, Kundal and Nakora areas (Rajasthan), Dhorio Nes, Sudasana, Alech Hills and Sodoari (Gujarat), and Kinwat (Maharashtra) in western India.
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