Abstract
A composite dike has been noticed in basement granite in the vicinity of Srisailam sub-basin near village Akkawaram, Mahabubnagar district, Telangana. It is trending N-S and traced over an extent of 600m in eastern flank of Akkavaram outlier and comprises rocks of mafic and felsic composition characterized by both gradational and abrupt contacts. On the basis of petrographic studies, felsic part of dike is designated as bostonite and mafic as dolerite. Geochemically, they are grouped into (i) trachyte to trachydacite and (ii) basalt categories. Such dissimilar mineralogical and chemical characters in a single dike may be due to coexistence of magma of contrasting composition and provides vital information for understanding the two phase liquid. Interestingly, high uranium values (0.022% U3O8) recorded in parts of felsic portion.
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Srivastava, S.K., Parashar, K.K., Ramesh Kumar, K. et al. A note on ‘composite dike’ in basement granite in the vicinity of Srisailam sub-basin near Akkavaram, Telangana. J Geol Soc India 89, 386–390 (2017). https://doi.org/10.1007/s12594-017-0619-6
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DOI: https://doi.org/10.1007/s12594-017-0619-6