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Imini mine, Imini area, Amerzgane Caïdat, Amerzgane Cercle, Ouarzazate Province, Drâa-Tafilalet Region, Moroccoi
| Regional Level Types | |
|---|---|
| Imini mine | Mine |
| Imini area | Group of Ore Bodies |
| Amerzgane Caïdat | Caïdat |
| Amerzgane Cercle | Cercle |
| Ouarzazate Province | Province |
| Drâa-Tafilalet Region | Region |
| Morocco | Country |
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Latitude & Longitude (WGS84):
31° 3' 17'' North , 7° 23' 3'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Setti Fatma | 22,283 (2018) | 33.7km |
| Oukaïmedene | 4,440 (2018) | 48.3km |
| Ouarzazat | 57,245 (2018) | 49.2km |
Sedimentary manganese deposit of Cretaceous age.
Located in the Atlas mountains, about 160 km southeast of Marrakech.
The deposit is hosted within a 10–20 m thick layer of mid-Cretaceous marine carbonates. Discovered in 1918, the mining area began operations in 1928, with production starting in 1938 and peaking in the 1970s at around 90,000 metric tons.
The stratigraphy of the Imini manganese deposit includes Triassic basalts and iron-rich sandstones, Cretaceous carbonates, and Turonian cherty dolostone. The deposit is interlayered with a 10–15 m thick dolostone unit. The three ore bodies, from base to top, are known as the C1, C2, and C3 manganese ore zones. The ore bodies extend over an area 400 to 1000 m wide and up to 25 km long, with the N70° trending Atlas tectonic structure controlling the orientation of the manganese deposits.
NOTE: The "pyrolusites" from Imini are in fact manganites partially replaced by pyrolusite (analyzed), so the best description of them would be: Pyrolusite replacing manganite. Furthermore, these are not actually from the Imini mine itself but rather from other diggings in the nearby area.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
8 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Coronadite Formula: Pb(Mn4+6Mn3+2)O16 References: |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ Hollandite Formula: Ba(Mn4+6Mn3+2)O16 |
| ⓘ Janggunite Formula: Mn5-x(Mn,Fe)1+xO8(OH)6 |
| ⓘ Manganite Formula: Mn3+O(OH) |
| ⓘ Pyrolusite Formula: Mn4+O2 |
| ⓘ Quartz Formula: SiO2 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| ⓘ | Coronadite | 4.DK.05a | Pb(Mn4+6Mn3+2)O16 |
| ⓘ | Hollandite | 4.DK.05a | Ba(Mn4+6Mn3+2)O16 |
| ⓘ | Manganite | 4.FD.15 | Mn3+O(OH) |
| ⓘ | Janggunite | 4.FG.05 | Mn5-x(Mn,Fe)1+xO8(OH)6 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Janggunite | Mn5-x(Mn,Fe)1+xO8(OH)6 |
| H | ⓘ Manganite | Mn3+O(OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Coronadite | Pb(Mn64+Mn23+)O16 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Hollandite | Ba(Mn64+Mn23+)O16 |
| O | ⓘ Janggunite | Mn5-x(Mn,Fe)1+xO8(OH)6 |
| O | ⓘ Manganite | Mn3+O(OH) |
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Quartz | SiO2 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Mn | Manganese | |
| Mn | ⓘ Coronadite | Pb(Mn64+Mn23+)O16 |
| Mn | ⓘ Hollandite | Ba(Mn64+Mn23+)O16 |
| Mn | ⓘ Janggunite | Mn5-x(Mn,Fe)1+xO8(OH)6 |
| Mn | ⓘ Manganite | Mn3+O(OH) |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Fe | Iron | |
| Fe | ⓘ Janggunite | Mn5-x(Mn,Fe)1+xO8(OH)6 |
| Ba | Barium | |
| Ba | ⓘ Hollandite | Ba(Mn64+Mn23+)O16 |
| Pb | Lead | |
| Pb | ⓘ Coronadite | Pb(Mn64+Mn23+)O16 |
Other Regions, Features and Areas containing this locality
AfricaContinent
African PlateTectonic Plate
- West African Craton
- Anti-Atlas Pan-African BeltOrogenic Belt
Morocco
- High AtlasMountain Range
Northwest Africa MeteoritesGroup of Meteorite Fall Locations
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References
Force, Eric R., Back, William, Spiker, Elliott C., Knauth, L. Paul (1986) A ground-water mixing model for the origin of the Imini manganese deposit (Cretaceous) of Morocco. Economic Geology, 81 (1) 65-79 doi:10.2113/gsecongeo.81.1.65
Thein, Jean (1990) Paleogeography and geochemistry of the “Cenomano-Turonian” formations in the manganese district of Imini (Morocco) and their relation to ore deposition. Ore Geology Reviews, 5 (4). 257-291 doi:10.1016/0169-1368(90)90034-k
Imini mine, Imini area, Amerzgane Caïdat, Amerzgane Cercle, Ouarzazate Province, Drâa-Tafilalet Region, Morocco