TY - RPRT TI - Gold deposits related to greenstone belts in Brazil; deposit modeling workshop; Part A, excursions AU - Charles H. Thorman AU - Eduardo A. Ladeira AU - Diane C. Schnabel PY - 1991 DO - 10.3133/b1980a UR - https://pubs.usgs.gov/publication/b1980A ID - b1980A ER -