Gjorgjiev, Lazar and Serafimovski, Todor and Filev, Kiril and Tasev, Goran (2016) Overview of the natural parameters from the geological-economical evaluation of the Borov Dol ore deposit, Republic of Macedonia. Special Issue of Geologica Macedonica, 4 (2). pp. 621-628.
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Abstract
Attractiveness of the newly explored Cu-Au porphyry Borov Dol ore deposit gave us an initiative to
calculate several important techno-economical parameters, which can define the economic type of this
mineralization. Namely, the degree of ore bearing in these types of ore mineralization is variable, but
calculation at particular levels and different drill holes gave the more realistic ratio of mixed types of
mineralizations within this ore body. Calculated ore-bearing coefficient was 0.78%, meaning that within the
ore body boundaries only 22% of mass is not mineralized somehow, which is highly compatible with
neighboring Buchim porphyry deposit and its four ore bodies. The calculated value of variation coefficient
(V) has shown value of 52% that is in the range of 43-100%, which displays that this ore body belongs to the
third group of deposits with uneven mineralization. An average copper, gold and silver concentrations were
determined as 0.247% Cu, 0.19g/t Au and 1.34 g/t Ag, respectively. Minimal economic content (MEC)
within the Borov Dol ore deposit, as represent of this kind of mineralizations, was determined as 0.204% Cu.
In similar manner was calculated the lowest copper boundary, which have shown value of 0.159% Cu and
thus allowing certain decrease of contents in the eventual process of exploitation of ore. Also, there were
calculated so called copper monometal values, which included influence of the present gold and silver in the
ore. Calculated copper monometal was set at relatively fair 0.272% Cu that repre-sents solid mainstay for
exploitation of copper in these low percentage ores. Calculated ore reserves in this particular ore body were
60 Mt of ore with 0.247% Cu, 0.19 g/t Au and 1.34 g/t Ag and projected life of eventual open pit mine of
promising 12 years.
| Item Type: | Article |
|---|---|
| Subjects: | Natural sciences > Earth and related environmental sciences |
| Divisions: | Faculty of Natural and Technical Sciences |
| Depositing User: | Goran Tasev |
| Date Deposited: | 03 Oct 2016 10:29 |
| Last Modified: | 03 Oct 2016 10:29 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/16343 |
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