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Hameda Quarries (Lhamda Mine), Jorf, Er Rachidia Province (Errachidia Province), Drâa-Tafilalet Region, Moroccoi
Regional Level Types
Hameda Quarries (Lhamda Mine)Group of Quarries
Jorf- not defined -
Er Rachidia Province (Errachidia Province)Province
Drâa-Tafilalet RegionRegion

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Latitude & Longitude (WGS84):
31° 30' 41'' North , 4° 36' 22'' West
Latitude & Longitude (decimal):
Locality type:
Group of Quarries
Köppen climate type:
Nearest Settlements:
Arfoud23,637 (2018)36.4km
Reçani20,469 (2018)41.1km
Errachidia92,374 (2017)49.7km

Quarries situated 36 km NW of Erfoud and 9 km E of the village Asselaa. erronously refered to as Lhamda mine.
The hydrothermal fluorite-baryte deposit lies in precambrian-hercynian granites in the northern part of the Jebel Ougnat massiv. It consisted of a 1.500 m long and 2 m wide fluorite vein, which had been exploited til 2003. New exploration works had been envisaged. The fluorite from this locality went to France and to Venezuela to be used in the ceramics industry. Apart from huge fluorite cubed there were also very large blocky baryte crystals up to 25 cm length.
See discussion on messageboard http://www.mindat.org/mesg-7-261866.html

Regions containing this locality

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

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

4 valid minerals.

Detailed Mineral List:

Formula: BaSO4
Reference: finds during Mindat Conference, 2012
Formula: CaF2
Reference: Martins da Pedra collection; Yves Masson collection
Formula: FeS2
Reference: Dedeyne, R. (2008) Marokko 2007, Deel 2, Geonieuws 33(3), maart 2008.
Formula: SiO2
Reference: finds during Mindat Conference, 2012
Quartz var: Amethyst
Formula: SiO2
Reference: Amir Akhavan Collection

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 3 - Halides
Group 4 - Oxides and Hydroxides
var: Amethyst4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
var: Amethyst-SiO2

List of minerals for each chemical element

O BaryteBaSO4
O QuartzSiO2
O Quartz (var: Amethyst)SiO2
F FluoriteCaF2
Si QuartzSiO2
Si Quartz (var: Amethyst)SiO2
S BaryteBaSO4
S PyriteFeS2
Ca FluoriteCaF2
Fe PyriteFeS2
Ba BaryteBaSO4

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Carboniferous - Ordovician
298.9 - 485.4 Ma

ID: 3307690

Age: Paleozoic (298.9 - 485.4 Ma)

Lithology: Sedimentary

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

358.9 - 419.2 Ma

ID: 3186359
Paleozoic sedimentary rocks

Age: Devonian (358.9 - 419.2 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

443.8 - 485.4 Ma

ID: 3138897
Ordovician undifferentiated

Age: Ordovician (443.8 - 485.4 Ma)

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dedeyne, R. (2008) Marokko 2007, Deel 2, Geonieuws 33(3), maart 2008.

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