| Takht |
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The Takht prospect located in Urumieh-Dokhtar arc in A small (about 200 x 200m) feldspar/monzonite porphyry hosts, and has caused skarn type alteration and copper mineralisation within the volcano-sedimentary (tuffaceous sandstone, conglomerates, hornfelsed tuff?) country rocks. This small stock has intruded on the margins of a larger granodiorite/granitic massif/batholithic body that is kaolinised on a regional scale (mapped as an altered intrusive). Common alteration/mineralisation assemblages within the country rocks are: Kaolinite ± Sericite ± chlorite ± epidote ± carbonate ± tremolite ± magnetite ± pyrite ± chalcopyrite; and within porphyry: clay ± chlorite ± pyrite ± magnetite ± chalcopyrite ± malachite. Weak-moderate quartz-sericite alteration was seen in outcrop and drill core and also locally K-silicate alteration exists at depth in drill core. Quartz stockworking – some veinlets with pyrite ± chalcopyrite centrelines - of a good density cuts both porphyry and country rocks over an estimated area of 150 x 100m. Quartz veinlets are greyish to blue-grey in colour and often sheeted. A prominent hill (approx 100 x 100m) of massive quartz + magnetite is porphyry hosted and contains copper mineralisation averaging ~ 0.25% (Yugoslav hole T1). Surficial copper mineralisation is manifested as malachite and the oxide profile is <30m from drill hole data, but may be partially oxidised to depths of <70m locally. No chalcocite was noted (reported in traces by Yugoslavs and in greater quantities by Douzalkav). Goethite is the dominant FeOx species at surface within the country rock skarns and porphyry. The best copper mineralisation is associated with the quartz stockworking but good calc-silicate skarn type alteration and weak to no copper mineralisation continues beyond the area tested by drilling. Visually, the better copper mineralised intervals appear to be within country rock rather than porphyry. This style of hydrothermal system has not been seen in All results in ppm.
Takht is a porphyry copper mineralised hydrothermal system. Quartz-sericite and presumably K-silicate alteration are weakly present in the dril core. On the basis of past/recent short drilling survey the following reserve calculated for the Takht porphyry copper prospect.
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