My favorite post from past ...I first posted this Feb 28th 2011. Here it is, ROG is in ELEPHANT country...BIRIMIAN DEPOSITS
Burkina Faso is still VERY UNDEREXPLORED relative to it's neighbours, hence the opportunity for a major find is EXCELLENT.
Most Birimian hosted gold deposits occur in corridors 10 to 15 kilometres wide, in the transition zone between volcanic belts and sedimentary basins which are characterized by regionally extensive shear zones. Two major styles of gold mineralization occur in the Birimian: structurally controlled quartz vein style deposits and chemical sediment hosted deposits where gold is associated in selvages to quartz veins.
following table. Grades in these deposits vary greatly from 7.59 grams per tonne (gpt) Au at Obuasi to 1.21 gpt Au at Siguiri.
Gold Reserves and/or Production from Key Mines in the Birimian Greenstone Belt
| Deposit | Country | Ounces | Grade |
| Obuasi | Ghana | 38,803,425 | 7.59 |
| Afaho | Ghana | 27,127,024 | 2.26 |
| Akyem | Ghana | 20,300,000 | 1.68 |
| Tarkwa | Ghana | 17,935,000 | 1.40 |
| Loulo | Mail | 16,020,000 | 4.49 |
| Sadiola | Mali | 14,022,000 | 2.03 |
| Siguiri | Guinea | 7,500,000 | 1.21 |
| Morila | Mali | 5,200,000 | 6.28 |
| Syama | Mali | 5,200,000 | 3.20 |
| Essakane | Burkina Faso | 3,200,000 | 1.62 |