Re: Interested to know a bit more about how to estimate value
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HIGH-GRADE NI-CU-PT-PD-ZN-CR-AU-V-TI DISCOVERIES IN THE "RING OF FIRE"
NI 43-101 Update (September 2012): 11.1 Mt @ 1.68% Ni, 0.87% Cu, 0.89 gpt Pt and 3.09 gpt Pd and 0.18 gpt Au (Proven & Probable Reserves) / 8.9 Mt @ 1.10% Ni, 1.14% Cu, 1.16 gpt Pt and 3.49 gpt Pd and 0.30 gpt Au (Inferred Resource)
Message: Re: Interested to know a bit more about how to estimate value
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Franz,
Obviously you can calculate the cubic meters or yards (the volume), but to calculate tonnage, you have to know what the standard weight of a particluar ore is per cubic meter or yard, i.e., the density. I posted my calculations a while back in respnse to a post by MiningJunkie.
I used the desnsity of copper ore. You can get valuable information, such as the chart below, form this website. Regards, B.
http://www.mininglife.com/Miner/general/Density.htm
| Material | Specific Gravity | Tons / Cubic Yard |
| Andesite | 2.5 - 2.8 | 2.11 - 2.36 |
| Basalt/Traprock | 2.8 - 3.0 | 2.36 - 2.53 |
| Coal - Anthracite | 1.3 | 1.08 |
| Coal - Bituminous | 1.1 - 1.4 | 0.92 - 1.18 |
| Copper Ore | 2 | 1.89 |
| Diabase | 2.6 - 3.0 | 2.19 - 2.53 |
| Diorite | 2.8 - 3.0 | 2.36 - 2.53 |
| Dolomite | 2.8 - 2.9 | 2.36 - 2.44 |
| Earth (dry) | 1.6 - 1.8 | 1.35 - 1.52 |
| Earth (wet) | 2 | 1.6875 |
| Gneiss | 2.6 - 2.9 | 2.19 - 2.44 |
| Granite | 2.6 - 2.7 | 2.19 - 2.28 |
| Gypsum | 2.3 - 2.8 | 1.94 - 2.36 |
| Iron Ore | 4.5 - 5.3 | 3.79 - 4.47 |
| Lead Ore (Galena) | 7.5 | 6.21 |
| Limestone | 2.3 - 2.7 | 1.94 - 2.28 |
| Marble | 2.4 - 2.7 | 2.02 - 2.28 |
| Mica, schist | 2.5 - 2.9 | 2.09 - 2.43 |
| Quartzite | 2.6 - 2.8 | 2.19 - 2.36 |
| Rhyolite | 2.4 - 2.6 | 2.02 - 2.19 |
| Rock Salt | 2.5 - 2.6 | 2.11 - 2.19 |
| Sandstone | 2.2 - 2.8 | 1.85 - 2.36 |
| Shale | 2.4 - 2.8 | 2.02 - 2.36 |
| Slate | 2.7 - 2.8 | 2.28 - 2.36 |
| Talc | 2.6 - 2.8 | 2.19 - 2.36 |
Density (in lb/cu ft.) = SG X 62.4 |
Density (SI units) = SG X Density of water |
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