Geochemical characteristics of post-magmatic alteration and tungsten mineralisation associated with Balda granite, District Sirohi, Rajasthan

Abstract

Balda leucogranite is characterised by high B, F, Li, Rb, W, Sn Nb content & Rb/Sr ratio and low Sr, Ba content & Ba/Rb ratio. In the case of altered and mineralised leucogranite geochemical data indicates variable B, F, Li, Rb, W, Sn, Nb contents and Rb/Sr & Ba/Rb ratios, differing significantly from those of fresh rocks. The Rb/Sr and Ba/Rb ratios as well as B, F, Li and Rb contents are the guiding characteristics of the granitic rocks which have undergone postmagmatic alteration and mineralisation, and they provide valuable clue for searching tungsten mineralisation in this area.