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Discovery of Uranium Mineralisation in Sheared Quartzite and Associated Crystallines in the Environs of Pranhita-Godavari Basin, Mysemgutta, Kaddam Area, Adilabad District, Andhra Pradesh
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Reconnaissance radiometric surveys in the northwestern parts of the western Pakhal belt in the Pranhita-Godavari Basin (PG basm), have led to the location of uranium anomalies for the first time in the environs of P-G Basin exclusively in the "older sheared fuchsite bearing quartzite'' overlain by the Neo-Proterozoic Penganga sediments in the proxmity of their unconformity contact at Mysemgutta, Kaddam, district Adilabad, A. P. Surface mineralisation is manifested in the form of secondary uranium minerals associated mainly along the fractures in the fault zones. The quartzite assayed up to 0.23% U3O8 with negligible thorium (2). Follow up petrological and XRD studies of the rocks revealed the presence of primary uranium mineral uraninite (UO2) in addition to secondary U-Minerats in the form of lanthinite [U6O7(OH)2O], metatorbernite [Cu(UO2)2(P04)2 8H2O] and phosphuranylite [Ca(UO2)4(PO4)2(OH)4 7H2O], besides U+Ti phases/brannerite [U,Ca,Ce)(Ti,Fe)206 Other ore minerals associated are chromite, pynte, pyrrhotite and rutile. The discovery has opened up new vistas for seeking Proterozoic unconformity related uranium mineralisation at the base of Neo-Proterozoic Penganga sediments in the PG Basin, Andhra Pradesh.
Keywords
PG Basin, Penganga, Fuchsite Quartzite, Unconformity, Kaddam, Mysemgutta, Andhra Pradesh.
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