Mining Engineering Practice Questions - PRC Mining Engineer Licensure Examination (Philippines) Exam

Which of the following describes the 'nugget effect' in geostatistical ore reserve estimation?

Random, short-range variability causing sample grades to vary significantly over very short distances A systematic overestimation of high-grade gold nuggets due to laboratory error The tendency of gold deposits to form large, cohesive, high-grade pods The mathematical correction factor applied to log-normal grade distributions

Correct Answer:

Random, short-range variability causing sample grades to vary significantly over very short distances

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