At the Institute of Geosciences, Federal University of Para (IG/UFPA), the elective course on
"Minerografia" (Ore Microscopy) seeks to introduce students of the penultimate semester of
undergraduate in Geology in the ways of this technique, which is of great importance because
it allows identify numerous opaque minerals with petrographic microscope (adapted to
reflected light), ask extremely useful in the study of paragenesis and textures of minerals in
addition to the geology of mineral deposits. This work conducted studies of ores from the
provinces of Rio Maria and Carajás, generating specific texts for each of the deposits with
emphasis on its opaque minerals. It also resulted in the organization of the collection of
samples for the course of Minerografia, that are used also by teachers of the Institute of
Geosciences who teach in graduate school. Currently the collection contains 306 samples, 128
from deposits of Carajas and Rio Maria Provinces and 178 samples belonging to various
deposits of which has little geological knowledge. Seventy seven samples belongs to deposits
from Bolivia (labeled SP), which were donated by Prof. Dr. Daniel Howard of University
Tomas Frias (UFMTF) and show a diversity of minerals and textures of great value. The main
minerals are the sulfides of Sb, Ag, Cu-Sb, Cu-Sn-Fe, Pb-Cu-Sb and Pb-Sn-Sb. All the
samples were organizated, recovered and catalogued to compose the collection of the Group
of Economic Geology (GGE) of the IG/UFPA, samples whose characteristics are very useful
in the field of Economic Geology. This work has identified a great diversity of minerals from
ore deposits that exist in the Carajas and Rio Maria Provinces, thus confirming its economic
potential, enriching the achievements of the GGE/IG/UFPA, since polished sections were
recovered, others made up, and new minerals were recognized. In addition, the author
acquired experience of extreme importance in the field of Economic Geology, specifically in
Ore Microscopy.
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