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The Historical Jaragua Gold Caves are vestiges of excavations in weathered rock, dating back to the Brazilian colonial times, situated NW of Jaragua peak, in the Sao Paulo municipality (SP). The areas were investigated to support historical preservation innitiatives. The excavations have lateral steep slopes and a narrow flat bottom zone, occupied by dense vegetation. The trace of the excavations is sinuous, trending N40-50W, in accordance to a transition zone of Neoproterozoic rocks: metapelites and metapsamites by the SW side and calc-silicate rocks and amphybolites at NE. The structural control results from three successive deformation phases. Urban expansion and road construction, during the last 30 years, have strongly impacted the areas: (I) Base of Quebra-Pe hill; (II) Jardim Britânia; (III) Morro Doce; (IV) Nova Anhanguera Park. A 5th site was disfigured by earthworks. The Jardim Britânia area is partly discharacterized by earthfills; this however does not impede further protection actions. This framework allows to recommend authorities: (1) to permit immediate preservation of these areas; (2) to develop programs to build an integrated site for scientific diffusion or an educational center for exhibition of rocks, ores and mineral samples; (3) to support the interest of some owners to preserve the area called Morro Doce, (4) to put forward a few proposals for educational use of the excavations, by production of field guides on the historic sites. The alternatives will help keeping alive the memory of mining in the Sao Paulo State.

Cavas históricas de ouro do Jaraguá: o que resta para se preservar?