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Geological Modelling | Grade

Grade and equivalent grade modeling can be performed by using composite and raw sample data with the grade modeling features.

A detailed filtering tool can be used in the grade modeling processes, as well as the equivalent grade calculation. Especially for polymetallic mines, a model can be produced according to the equivalent grade value.

FeatureDescription
Composite/Raw Sample
Data TypeYou can use composite or raw sample data for modeling.
Borehole GroupWhen the raw sample data type is selected, the borehole group or groups can be selected.
Calculation MethodGrade or equivalent grade methods can be used. While filtering options are used for the grade, the equivalent grade calculation can be used for especially polymetallic mines.
BetaIt has an effect on the limits of the model to be produced. When the B value increases, the model expands and when the value decreases, the model shrinks. The button near that option calculates the average distance between boreholes. That value will have an effect on the RBF points. Different value entries will be required for the different projects.
 
C

It is an uncertainty range that will increase or decrease the points between boreholes. The c value is between 0 and 1. When the C value is closer to 0, uncertainty decreases, when it’s closer to 1, uncertainty increases.

Filter /TenorWhen the Tenor method is used, a filter can be applied with the help of numerical values ​​by adding a filter with the F3 Add operation in the filter section for a single or more than one attribute. The implicit model to be produced at the end of the process will be the model representing the specified filter intervals.
Filter /Equivalent Grade

When the Equivalent Grade method is used, the parameters described below become active. Related parameters can be entered separately for more than one metal that can be added with the help of the F3 Add. After the process, the equivalent grade value can be calculated.

Attribute: This is the section where the attributes to be used in the equivalent grade calculation are selected.

Grade: The value of the attribute to use in the calculation

Unit: Unit of the Attribute

Process Efficiency (%): It is the yield of the concentrated ore in the facility.

Mineral Price: The selling price of ore

Sales Unit: Unit of the Attribute

Smelter (%): It is the process of separating the metal content of the ore from the rest of the ore by means of a high-temperature reduction reaction. It expresses the efficiency of this process.

Equivalent Tenor Attribute: Attribute value to be calculated equivalent grade

Equivalent Tenor: Calculated equivalent grade

Calculate Equivalent Tenor: The button that allows the equivalent grade calculation to be made

Grid Points
GridAdds a grid that shows the borehole limits to the 3D screen.
X, Y, Z RangeThat value defines the distance between the points to be produced. That points will be created inside the grid limits. In another way, we’ll turn the grid object into a point cloud. These points will be used when we run the RBF later on.
Extra Distance X,Y,Z(Direction)That value will extend the grid limits for the selected direction
Select Grid Boundary

The limit can be defined for the grid. That feature allows grid points to be produced only in a limited area.

Trend
Function SelectionLinear or Multiquadric method selections are made. When the global trend is to be used, the linear method is chosen, and when the local trend is to be used, the multiquadric method is chosen.
Global TrendIf there is a unidirectional dip at the lithological levels to be modeled, the global trend is used. With the help of the slider that can be changed manually or dynamically and the same azimuth, rake and dip can be defined as the level to be modeled.
Local TrendIf different angles are observed in different regions at the lithological levels to be modeled, a local trend is used. When the local trend is selected, the upper and lower surfaces of the lithology to be modeled are produced, and the elevation points following the surface are produced at the specified X, and Y intervals on this surface. These points can be produced within the selected limits, or if there is a border outside the model, they can be extended to the limit.
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