As Betas e a cassiterita de São João del Rei

Resumo

In this article the author transmits some impressions of a recent visit to the region near São João del Rei He shows very accurately the geologic nature, the characteristic features of ridges in that municipality, and draws profiles resulting from direct observations on the ground

            In approaching briefly the historical background of gold mining there, he gives us an insight into the placer mining under way Interesting veins and the rough landscape of the areas mineralized with deposits of auriferous quarts me described

            He points out that discovery of tin-bearing alluvials has stimulated interest in the zone Precisely at the time of a heavy demand for this metal in view of the situation in the East Indies, - the source of the largest supplies of tin for the world's requirements

            He describes the type of the occurrence as well as the process of exploitation and is not very optimistic about that novel activitiy as yet under primitive placer mining