Copper and Associated Uranium Mineralisation in Mayurbhanj Granite Batholith, Kesharpur-Madansahi-Dudhiasol Sector, Eastern India: A Promising Future Prospect
Authors
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Geological Survey of India, SU: Odisha, Nayapalli, Bhubaneshwar, 751 002
Haraman Mahanta -
Geological Survey of India, SU: Odisha, Nayapalli, Bhubaneshwar, 751 002
Israil Khan
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Geological Survey of India, SU: Odisha, Nayapalli, Bhubaneshwar, 751 002
S. Syam Kumar
DOI:
https://doi.org/10.1007/s12594-021-1816-xKeywords:
No KeywordsAbstract
Appreciable amount of copper mineralisation dominated by chalcopyrite along with incidence of uranium within the Mayurbhanj granite batholith in Kesharpur-Madansahi-Dudhiasol sector has been established through preliminary exploration (UNFC-G3). Chalcopyrite-pyrite-pyrrhotite assemblages along with minor pentlandite seems to be preferably controlled through secondary structural shear fabric and vein selvages along the contact zones of granite and country rocks viz. hornblende biotite schist and metabasics. Hydrothermal alteration is notably marked by potassic, propyllitic and phyllic zones besides wide chloritisation and silicification in close proximity and within mineralised zone. Three potential prospects of significant copper mineralisation in terms of thickness and grade have been brought out at Kesharpur, Madansahi and Dudhiasol. These prospects show a linear lensoidal synformal disposition of the ore body trending NE-SW in eastern part to E-W in central part and NW-SE in the western part with moderate to steep northerly dipping. Out of these three prospects, Madansahi is quite promising where thickness of copper lodes varying from 2.00 m to 18.35 m and grade varies from 0.20% Cu to 1.76% with maximum nickel concentration of up to 0.13% Occurrence of copper mineralisation along with nickel concentration and anomalous uranium values up to 0.045% U3O8 is a significant achievement in establishing polymetallic mineralisation and augmenting the mineral resources in eastern India.
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