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Imini area, Ouarzazate Province, Drâa-Tafilalet, Moroccoi
Regional Level Types
Imini areaArea
Ouarzazate ProvinceProvince
Drâa-TafilaletRegion
MoroccoCountry

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Latitude & Longitude (WGS84):
30° North , 6° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~96km
Locality type:


The strata-bound manganese orebodies of the Imini district formed in a laterally extensive karst cave system, developping in a shallow marine dolostone succession of Cretaceous age. The manganese ores occur in dolostone breccias and ferruginous clays.

The "Pyrolusites" from Imini are in fact Manganites partially replaced by Pyrolusite (analyzed), so the best description of them would be: Pyrolusite replacing Manganite.

Regions containing this locality

African PlateTectonic Plate
Northwest Africa MeteoritesMeteorite Fall Location
Atlas Mountains, North AfricaMountain Range
Anti-Atlas Mountains, MoroccoMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

10 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Baryte
Formula: BaSO4
Reference: Econ Geol (1986) 81:65-79
Calcite
Formula: CaCO3
'Clays'
Reference: Econ Geol (1986) 81:65-79
Coronadite
Formula: Pb(Mn4+6Mn3+2)O16
Dolomite
Formula: CaMg(CO3)2
'Feldspar Group'
Reference: Econ Geol (1986) 81:65-79
Goethite
Formula: α-Fe3+O(OH)
Reference: http://www.mindat.org/forum.php?read,11,379474,379526
Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
Janggunite
Formula: Mn5-x(Mn,Fe)1+xO8(OH)6
Manganite
Formula: Mn3+O(OH)
Reference: Thein, J. (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.
Pyrolusite
Formula: Mn4+O2
Quartz
Formula: SiO2

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Coronadite4.DK.05aPb(Mn4+6Mn3+2)O16
Goethite4.00.α-Fe3+O(OH)
Hollandite4.DK.05aBa(Mn4+6Mn3+2)O16
Janggunite4.FG.05Mn5-x(Mn,Fe)1+xO8(OH)6
Manganite4.FD.15Mn3+O(OH)
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Unclassified Minerals, Rocks, etc.
'Clays'-
'Feldspar Group'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Manganite6.1.3.1Mn3+O(OH)
Miscellaneous
Janggunite6.4.7.1Mn5-x(Mn,Fe)1+xO8(OH)6
Group 7 - MULTIPLE OXIDES
AB8X16
Coronadite7.9.1.4Pb(Mn4+6Mn3+2)O16
Hollandite7.9.1.1Ba(Mn4+6Mn3+2)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Clays'-
'Feldspar Group'-

List of minerals for each chemical element

HHydrogen
H ManganiteMn3+O(OH)
H JangguniteMn5-x(Mn,Fe)1+xO8(OH)6
H Goethiteα-Fe3+O(OH)
CCarbon
C CalciteCaCO3
C DolomiteCaMg(CO3)2
OOxygen
O ManganiteMn3+O(OH)
O PyrolusiteMn4+O2
O HollanditeBa(Mn64+Mn23+)O16
O CoronaditePb(Mn64+Mn23+)O16
O CalciteCaCO3
O QuartzSiO2
O JangguniteMn5-x(Mn,Fe)1+xO8(OH)6
O DolomiteCaMg(CO3)2
O BaryteBaSO4
O Goethiteα-Fe3+O(OH)
MgMagnesium
Mg DolomiteCaMg(CO3)2
SiSilicon
Si QuartzSiO2
SSulfur
S BaryteBaSO4
CaCalcium
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
MnManganese
Mn ManganiteMn3+O(OH)
Mn PyrolusiteMn4+O2
Mn HollanditeBa(Mn64+Mn23+)O16
Mn CoronaditePb(Mn64+Mn23+)O16
Mn JangguniteMn5-x(Mn,Fe)1+xO8(OH)6
FeIron
Fe JangguniteMn5-x(Mn,Fe)1+xO8(OH)6
Fe Goethiteα-Fe3+O(OH)
BaBarium
Ba HollanditeBa(Mn64+Mn23+)O16
Ba BaryteBaSO4
PbLead
Pb CoronaditePb(Mn64+Mn23+)O16

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Gutzmer, J.; Beukes, N. J.; Rhalmi, M.; Mukhopadhyay, J. (2006): Cretaceous karstic cave-fill manganese-lead-barium deposits of Imini, Morocco. Economic Geology 101, 385-405.

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