Geochemical exploration in Khunic
The study area that is 80 km2, is located 57 km far from Khousef and 93 Km far from Birjand; between 32? 21' to 32? 26' northern latitudes and 59? 08' to 59?13' eastern longitudes. It is part of 1:50000 topography map of Barzaj.
Structurally, this area belongs to Central Iran, between Lut and Nehbandan-Khash subzones. Dominant tectonic trend is northwest-southeast to North-South. Regional lithology includes microdiorite, latite, andesite, dacite, rhyolite, tuff, conglomerate and agglomerate.
Stream sediment samples analyzed for 23 element including Zn, W, V, Ti, Sr, Sn, Sc, Sb, Pb, Ni, Mo, Mn, Hg, Fe, Cu, Cr, Co, Cd, Bi, Ba, Au, As and Ag. The achieved data were subjected to statistical analyzes. Finally several anomalies were introduced.
Finally several samples have anomalous quantities of elements listed below:
Mn: seven samples of tuff, latite and agglomerate; Au: 5 samples; Cu: 7 samples; Sr: 11 samples; Mo: 6 samples; Sb: 3 samples; Sn: 4 samples; Pb: 5 samples; W: 5 samples; Ag: 2 samples; Cd: 3 samples; Sc: 3 samples; Ba: 7 samples; Co: 12 samples; Fe: 8 samples; V: 8 samples; Cr: 8 samples; Ti: 5 samples; Zn: 10 samples; Hg: 4 samples and As: 11 samples.
Identified heavy minerals in this area include zircon, ilmenite, rutile, leucoxene, sphene, anatase, olivine, pyroxene, chromite, cerussite, galena, anglesite, apatite and tourmaline.
22 mineralized samples were taken from a silicic-carbonatic vein in the Khunik Mountain, 4 km north of Anaran village. The vein is 60 Cm wide and 150 m long. Its attitude is N10E, 65SE. the country rock is massive and high-elevated volcanics. Apparently, the vein follows the fault trend. It contains low sulfide minerals in carbonatic portion.
Two types of mineralization are identical in the study area. Vein-type mineralization that has occurred in silicic, hematitic and limonitic veins. Silicic veins contain high amount of sulfide minerals. The second type has occurred in kaolinitic-altered portions of latite that contain high sulfide zones. The mineralization is the consequence of microdiorite intrusion and subsequent kaolinization.