Geological and geophysical data integration for delimitation of mineralized areas in a supergene manganese deposits

作者：Moreira Cesar Augusto^*; Borges Mario Rezende; Lira Vieira Glauber Matheus; Malagutti Filho Walter; Fernendes Montanheiro Mariana Aparecida

来源：Geofisica Internacional, 2014, 53(2): 201-212.

DOI：10.1016/s0016-7169(14)71500-4

• deposit
• manganese
• supergenic
• electrical resistivity
• chargeability

Geophysical methods are widely used in mineral exploration. This paper discusses the results of geological and geophysical studies in supergene manganese deposits of southern Brazil. Mineralized zones as described in geological surveys were characterized as of low resistivity (20 Omega.m) and high chargeability (30ms), pattern found also in oxides and sulfite mineral deposits. Pseudo-3D modeling of geophysical data allowed mapping at several depths. A relationship between high chargeability and low resistivity may define a pattern for high grade gonditic manganese ore. Large areas of high chargeability and high resistivity may result in accumulation of manganese and iron hydroxides, due to weathering of the gonditic ore, dissolution, percolation and precipitation.

• 出版日期2014-6
• 单位Univ Estadual Paulista