Trepca mine in Stanterg dates from 1930 as giant
mining complex, and it is known across the world with a high grade of Pb, Zn
and Ag minerals. Furthermore, this mine is enclosed by mineralogy zones with
high grade of ore and considerable reserves. In this paper will be discussed
variable grade of ore taking into account the orebodies which are dipping at
considerable depth under the earth crust. Evaluation and definition of
geological resources in deposit is done on the research and production phase.
During the exploration phase, the knowledge in regard to mineral resources will
make clear the point of view on aspect of ore grade. Whereas, during the
production phase is more realistic data on ore grade are available. Evaluation
of ore grade and resources of a particular deposit, planning and control of
grade are the first three actions are important during exploitation phase of
mineral resources. Moreover, mine planning for long or short term has an impact
on evaluation process. In this paper are conducted several ore bodies and are
taken many samples during the production phase in various horizons.
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