This study illustrates the application of conditional simulations to calculate uncertainty associated with thickness bauxite ores. The deposit Rondon do Pará in northern State, Brazil, is characterized by a well-defined lateritic profile, ore being composed two sequential horizons: massive and ferruginous bauxite. used data from 1.005 drillholes different grid spacing. Drillhole intervals both ...

Production of Metallogenic-prognostic map (MPM) was preceded by the preparation of instructions that define three phases of work: preparation (with preparation of the Project), realization of field and laboratory research and data processing with production of different maps and, finally, production of the prognostic map with the accompanying instruction book. During the Project realization, th...

BACKGROUND Noise-induced hearing loss has been an intractable problem for heavy industry. AIMS To report our experience in reducing the incidence of age-corrected confirmed 10 dB hearing shifts (averaged over 2, 3 and 4 kHz) in employees in the primary aluminium industry in Australia over the period 2006-13. METHODS We analysed annual audiometric data to determine the number of permanent he...

Soil microbial community characterization is increasingly being used to determine the responses of soils to stress and disturbances and to assess ecosystem sustainability. However, there is little experimental evidence to indicate that predictable patterns in microbial community structure or composition occur during secondary succession or ecosystem restoration. This study utilized a chronosequ...