Geoscience Reference
In-Depth Information
Fig. 14.29
Drift analysis, Resource Model 2003 vs. declustered 10 m composites, vertical direction
Fig. 14.30
Grade-tonnage curves, 2003 Resource Model vs. DG-predicted SMU Model, all sulfides
age of 0.773 % TCu, compared to 0.771 % TCu for the
declustered composites (Fig.
14.29
).
In practice, for deposits that are massive such as Cerro
Colorado (porphyry copper) drift analysis is performed
along the three Cartesian coordinates. For a vein- or reef-
type deposit, the directions of interest could be along strike
and down dip. In the case of Cerro Colorado, the drift in the
Easting, Northing, and Elevation directions were analyzed
Swath or Drift (trend) plots
is a one-dimensional graph
that shows average grades of the block model and of the
declustered composites in certain directions of interest.
