RE:RE:RE:RE:RE:Early Days......adding this to the others.
from accross the pond,
clay_lake_gold_target Examples of major carbonaceous shale hosted deposits
| DEPOSIT | LOCATION | AU MILLION OZ | AU GRADE (G/T) | AGE OF HOST ROCKS | SEDIMENTARY LITHOLOGIC
UNITS |
| Macresa Flat | New Zealand | 8.0 | 1.2 | Jurassic | Carbonaceous
Schists |
| Spanish Mountain | Western Canada | 1.7 | 0.8 | Triassic | Carbonaceous
Mudstone, Greywacke |
| Nezhdaninskoye | Russia | 10.0 | 5.4 | Early Permian | Carbonaceous
Siltstone, Sandstone |
| Zarmitan | Tien Shan Asia | 15.0 | 9.5 | Silurian | Metasediments |
| Muruntau | Tien Shan Asia | 169.3 | 3.5-4.0 | Ordovician-Silurian | Carbonaceous
Mudstone, Carbonate
Sandstone |
| Amantaitau | Tien Shan Asia | 9.2 | 3.7 | Ordovician-Silurian | Carbonaceous
Metasediments |
| Bendigo | Se Australia | 17.1 | 12.9 | Lower Ordovician | Sandstone,
Carbonaceous
Mudstone |
| Sukhoi Log | Edge Siberian Craton | 61.4 | 2.8 | Neoproterozoic | Carbonaceous
Mudstone
Siltstone |
| Telfer | Patterson, WA | 50.0 | 1.5 | Neoproterozoic | Sandstone
Mudstone |
| Brasilia - Morro
Do Ouro (Kinross) | Brazil | 17.4 | 0.4 | Neoproterozoic | Carbonaceeous
Phyllite |
| Modified after Ross Large et al. 2011 A Carbonaceous Sedimentary Source-Rock Model for Carlin-Type and Orogenic Gold Deposits (Economic Geology v106 pp.331-358) |
Black carbonaceous shale hosted gold deposits share a number of characteristics:
- These gold deposits include districts such as Tien Shan in Asia which are part of continental margins.
- The districts underwent collision events, accompanied by emplacement of granite batholiths with folding and regional metamorphism of sedimentary rocks.
- Geophysical data infer that deep-seated granite bodies underlie the gold camp
- Overprinting contact metamorphism occurred.
- Hosting structures include deep-seated shear zones
- Gold mineralisation post-dates metamorphism events and is in close spatial and temporal relation to dyke belts.