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When the economic feasibility of a project has been demonstrated, by taking into account Modifying Factors (i.e. mining, processing, metallurgical, infrastructure, economic, marketing, legal, environmental, social and governmental factors), then a Mineral Reserve can be declared. [7]
The style of mineralization or other factors could mean that Proved Mineral Reserves are not achievable in some deposits. Generally the conversion of Mineral Resources into Mineral Reserves requires the application of various Modifying Factors, including, but not restricted to: mining factors; mineral processing / ore dressing related factors;
The JORC [5] Code was first published in 1989, with the guidelines published in 1990. During the 1990s, it became clear that the evaluation of mineral deposits should be based on an internationally recognised code of reporting in order to improve the security of investments in this economic sector (e.g. Bre-X case).
Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model.There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.
Diagram as published by McKelvey in 1973 [1] Diagram as published by McKelvey in 1976 [2]. A McKelvey diagram or McKelvey box is a visual representation used to describe a natural resource such as a mineral or fossil fuel, based on the geologic certainty of its presence and its economic potential for recovery.
The surface modifying factor, , is related to both the tensile strength, , of the material and the surface finish of the machine component. k S = a S u t b {\displaystyle k_{S}=aS_{ut}^{b}} Where factor a and exponent b present in the equation are related to the surface finish.
In statistics and regression analysis, moderation (also known as effect modification) occurs when the relationship between two variables depends on a third variable.The third variable is referred to as the moderator variable (or effect modifier) or simply the moderator (or modifier).
A human disease modifier gene is a modifier gene [1] [2] that alters expression of a human gene at another locus that in turn causes a genetic disease.Whereas medical genetics has tended to distinguish between monogenic traits, governed by simple, Mendelian inheritance, and quantitative traits, with cumulative, multifactorial causes, increasing evidence suggests that human diseases exist on a ...