ORE RESERVE ESTIMATION METHODS DOCX

Title	ORE RESERVE ESTIMATION METHODS
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Summary

The main objective of ore reserve estimation is to as accurately as possible define the extent (size) and value (grade) of a mineral deposit. We are confronted with two primary objective of this process and these are: 1. Extent Determination and 2. Value Determination Value and extent of a mineral d...

Description

The main objectie of ore reserie estmaton is so as accurasely as possible defne she exsens (size) and ialue (grade) of a mineral deposis. We are confronsed wish swo primary objectie of shis process and shese are: 1. Extent Determination and 2. Value Determination Value and extent of a mineral deposit can be estimated using classical methods or geostatistical methods. Let us look at the simple and easy to use techniques that is the Classical Methods. Classical methods employ simple geometric that are easily applied to simple uncomplicated orebodies. The widely used classical methods used are: 1. Polygon Method 2. Triangular Method 3. Sectional Method 1. Polygon Method Determining the extent To determine the extent of the deposit, polygons are developed around each sampling point to establish the area of influence which extends half the distance of the sampling distance and in an equidistance manner. The volume and tonnage of the deposit is then determined using simple geometrical equations. Determining the Value Value is dependent on the ore grade and therefore the average grade of the polygons are then used to establish the grades of each polygon. The average grade of the deposit is determined by taking the arithmetic average of all grades of the individual polygons. 2. Triangular Method Determining the extent Triangular method is and extended approach of the polygon method. To determine the extent of the deposit, triangles are developed such that sampling points form the apices of the triangles. The volume and tonnage of the deposit is then determined using simple geometrical equations. Determining the Value The average grade of the deposit is determined by taking the arithmetic average of all grades of the individual triangles....