Small scale gold-quartz exploration in north west of Iran case study on Masjeddaghi gold resource

Category Other
Group GSI.IR
Location International Geological Congress,oslo 2008
Author Soodishoar, Payam
Holding Date 15 September 2008

While the medium and big gold resources are so attractive for private investors to exploit, on the popular point of view, small gold resources are one of the most important mines to small local unions to obtain benefit and of course to avoid uncontrolled immigration from small villages to big cities especially in under developing countries.
For this purpose, governments should provide a suitable base for small companies to be active in these kinds of gold resources. For instance, popular sector can help these companies by decreasing the tax rate or granting the loan and of course the main one, which is guide them how to explore these kinds of deposits.
Due to small amount of money, which is available for these kinds of companies the optimum way of exploration, is vital for them. Masjed Daghi Quartz - Gold vein is one of small sort of gold deposit, which was explored by traditional method. During reserve evaluation procedure, some evidences have found those guide us to suggest a workload for low cost exploration of these sorts of mineralization in northwest of Iran.
The depth of oxidized zone, is very important parameter in these kind of deposits, because due to ore dressing procedures sulphide zone is not economic at all and only the oxidized zones are extractable for investors.
For simulation and reserve estimation, Geostatistical methods were used and computations show, while there is a vein contains gold but the variety of gold grades is too much to find out its continuously by vast sampling grid. In depth, at the cross points of boreholes and vein, different types of mineralization, those show different ore deposit types and other geological evidences such as alteration make a hard condition to compare surfacial data with depth.
On these kinds of mineralization, finding the right Variogram(s) which can introduce the 3D structure is very hard and needs too many considerations. To recap, on this study we have used geostatistical methods too evaluate the validities of obtained data from boreholes and trenches and then distinguished the economic part of veins for small scale working due to the available data then shows the areas those need more data by computing the areas with high estimation’s variance.
Eventually with comparing this deposit with the similar ones on this area, we have suggested the ways, those helps the popular sector to provide a base to active these small deposits.