USE OF PROVINCE WIDE MRA INFORMATION


1) Care must be taken when comparing the rankings of tracts that
are seperated by significant distances.  Althought all tracts
were assessed using the same methodology, exploration and 
infrastructure development histories vary considerably across
the province and influence the relative ranking of the tracts.

2) The preferred method of classifying the tracts is to place 
equal areas of land in each category rather than number of tracts.
A ten or twenty class display produces an effective display.  A
three class display is not advised, it suggests the "high, med, low"
consept which is not valid with this information.  What ranks lowest 
in any relative comparison may have significant mineral potential, it 
just lower than the other tracts in the evaluation.

Ten class thresholds based on area, values listed are rank values.

Metallic Potential	Industrial Mineral Potential
128				79
138				169
170				185
230				230
292				286
367				355
447				462
557				581
716				692
795				795

July 19, 1999

