Review of Gold Genesis, Tuzlar Deposit, NW ofMahneshan
|Category||Economic geology & mineral exploration|
|Location||21th symposium on geosciences|
|Holding Date||21 May 2008|
Tuzlar deposit is located in some 5km southeast of Pari village, in Zanjan province. Mineralization occurs in Oligo-Miocene volcanic rocks.
The area wasn?t studied until 1998. Preliminary sampling showed gold potential in the area. In structural geology view, the area is located in Sanandaj-Sirjan zone (Stucklin, 1968), Khoi-Mahabad zone (Nabavi, 1976). Image processing shows elongated ring structural, (10km length in E-W direct and 6km width) in the area. In the center of ring 3 altered zone is defined, which are displaced by NNE-SSW faults. Pyroxene andesite is most significant rock units in area. This unit is including Oligo-Miocene brown- violet, gray andesite porphyry lava. Andesitic aglomerate and lappily tuff is outcropped in central and northern parts of the area. Monzodiorite (quartz- monzonite) has limited outcrop in down topographic surface. Extension of alteration and mineralization is silicified zones and west veins are proved. Mineralization in porphyry system (Cu ? Au) in central and eastern part needs more study. Silicification, argillization, phillitic alteration quartz-chalcedony- alunite alteration, western advanced argillic and propilitic alteration is defined and mapped in the area. Up to 10 ppm gold has seen in silica zones in western part. Geological ore reserve of silica veins is 1-3 MT @ 2-3.5 ppm.