Basic concepts in three-part quantitative assessments of undiscovered mineral resources |
| |
Authors: | Donald A Singer |
| |
Institution: | (1) U.S. Geological Survey, 345 Middlefield Road, 94025 Menlo Park, California, USA |
| |
Abstract: | Since 1975, mineral resource assessments have been made for over 27 areas covering 5×106 km2 at various scales using what is now called the three-part form of quantitative assessment. In these assessments, (1) areas are delineated according to the types of deposits permitted by the geology,(2) the amount of metal and some ore characteristics are estimated using grade and tonnage models, and (3) the number of undiscovered deposits of each type is estimated.Permissive boundaries are drawn for one or more deposit types such that the probability of a deposit lying outside the boundary is negligible, that is, less than 1 in 100,000 to 1,000,000. |
| |
Keywords: | Mineral resource assessment Mineral deposit models Quantitative assessment Three-part assessments |
本文献已被 SpringerLink 等数据库收录! |
|