Geology of the Copper Mineralization in Proterozoic Ajabgarh Meta-Sediments of, Dokan-Dariba Belt, Sikar District Rajasthan Northwestern India

The Khetri copper belt is a well-known metallotect in northern part of Delhi fold Rajasthan. On the eastern margin sub basin North separated by basement high, another Alwar-Ajabgarh exposes that thick sequence Ajabgarh group rocks overlies arenaceous Alwar Super Group rocks. meta sediments here Neem Ka thana area are characterized presence Bornite dominated mineralization with silver association and minor Pb. has been described various workers as strata-bound, hypogene IOCG. But these inferences based on information inference drawn sectorial nature. current study includes holistic exploration over period more than two decades data generated suggest thereof, this syngenetic sulphide associated sedimentation marl carbonate Subsequently it relocated during 2nd deformation accompanied epigenetic component depicted terms vein filled coarse grained aggregates bornite chalcopyrite disposed across general disposition litho-package. EPMA fluid inclusion from indicate typical hydrothermal environment minerals like, Perkrite, Wittchenite, Aguilarite, Molybdnite etc. mineralizing fluids have trapped between temperature ranges 130°C to 375°C average being 250°C 300°C. salinity also varies near pure hot water moderately saline indicative multi-episodic nature coupled component. ore textures 500°C range; certain intergrowths like specular hematite occurrence induced due emplacement granite/pegmatite southern margins belt. strata bound suggests euxogenic facilitated facies parallelism rock fabric was attained first assemblage deposited D2 brittle ductile shear zones limb shears, 570°C deduced petrochemical data. Hence comprehensive model suggested evolution process Thana