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Tagpura porphyry skarn zone has an indicated a "conceptual or order of magnitude" potential tonnage range of some 10 million tonnes to 15 million tonnes with a potential grade range between 0.50% copper and 0.20 g/t gold to 0.70% copper and 0.31 g/t gold. For more information, read the August 5, 2008 news release.
Cadan considers that the quality and quantity of the resource definition data is sufficient to commence an initial resource estimation of the Tagpura porphyry skarn copper-gold zone. This includes 3,510m of drilling, detailed geological mapping, detailed channel sampling with the collection of over 700 channel samples, surveying, geophysics and extensive specific gravity determinations.
The Table below highlights representative drill intercepts of the porphyry skarn.
tagpura porphyry skarn drill intercepts
| hole |
intercept meters |
incl. meters |
copper % |
gold g/t |
| TDG 1 |
208.6 |
|
0.45 |
0.17 |
| |
|
88 |
0.92 |
0.34 |
| |
|
49 |
1.30 |
0.40 |
| |
|
|
|
|
| TGD 4 |
83 |
|
0.52 |
0.12 |
| |
|
|
|
|
| TGD 5 |
41 |
|
0.54 |
0.31 |
|
|
|
|
|
|
| TGD 14 |
148 |
|
0.41 |
0.11 |
|
|
|
75.6 |
0.60 |
0.13 |
|
|
33 |
|
0.81 |
0.33 |
|
|
|
|
|
|
| TGD 15 |
162.6 |
|
0.80 |
0.31 |
|
|
|
|
|
|
| TGD 24 |
112.5 |
|
0.52 |
0.23 |
|
|
|
|
|
|
| TGRC 30 |
119 |
|
0.33 |
0.10 |
|
|
|
22 |
1.12 |
0.30 |
|
|
|
|
|
|
| TDG 60 |
116 |
|
0.72 |
0.30 |
|
|
|
60 |
1.20 |
0.52 |
|
|
|
30 |
2.10 |
0.80 |
The news release dated August 5, 2008 announced these results.
The porphyry skarn zone remains open along strike in both directions and at depth. Drilling of it is supplemental to the ongoing drilling of the adjacent large tonnage Tagpura porphyry copper gold resource.
processing option
Cadan is pleased with these results at the Tagpura porphyry skarn as it demonstrates an additional style of mineralization that may be particularly suitable for "bacterial heap leaching" and early positive cash flow. A metallurgical test work study has commenced to determine heap leach amenability.
A bacterial heap leach operation with a start up capacity of two million tonnes per annum is being reviewed with a potential resource tonnage range of some 10 million tonnes to 15 million tonnes. A 5 to 7 year plus mine life is envisaged.
mining option
The porphyry skarn high grade resource is located within an existing open pit. This enables the "box cut" mining method to be considered the most appropriate approach, particularly as there is no overburden to remove and thus mining costs are optimized.
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