Morro da Mina Mine, Conselheiro Lafaiete (old Queluz de Minas), Minas Gerais, Southeast Region, Brazil

Gondites and Queluzites, the metamorphosed manganese protores, are regularly distributed in the Greenstone Belt, occupying narrow and elongated zones in the metabasaltic and metaultrabasic parts. These protores were cut by granodioritic bodies, pegmatitic and aplitic veins and faults.

Ref.:
http://acd.ufrj.br/geologia/posgrad/area1d.htm