|Latitude & Longitude (WGS84):||33° 9' 38'' North , 5° 37' 46'' West|
|Latitude & Longitude (decimal):||33.16083,-5.62972|
|Other regions containing this locality:||Atlas Mountains, North Africa|
Northwest Africa Meteorites
|Köppen climate type:||Csa : Hot-summer Mediterranean climate|
|Name(s) in local language(s):||Jbel Aouam (Djebel Aouam, Jebel Awam)|
|Other/historical names associated with this locality:||Tighza Mine|
Active lead-zinc-silver deposit. Located in the Atlas Mts., between Azrou and Khénifra.
Mineralized veins located within an elliptic zone of contact metamorphism (skarns) around three Stephanian granitic stocks.
These granites intrude Upper Ordovician to Visean sedimentary formations.
Three types of veins (Post-Visean open faulting) mineralizations are known:
- W-mineralization (290-280Ma), with two stages : 1st stage with scheelite, löllingite, gold, wolframite, biotite, apatite, alkaline feldspars, quartz (2 generations : one with scheelite-wolframite, one with scheelite-molybdenite), calcite, muscovite, chlorite and molybdenite; 2nd stage with scheelite, quartz, muscovite, chlorite, calcite, arsenopyrite, pyrrhotite, pyrite and chalcopyrite
- Pb/Zn-mineralization (circa 255+/-15Ma): with 4 major parageneses, the first with barren siderite, then siderite and quartz, galena, then ankerite-galena-sphalerite ; the latter with calcite, chalcedony, baryte, galena, sphalerite and pyrite
Five veins are currently being exploited : Signal vein, Ighrem Aousser vein, Sidi Ahmed vein, Iguer Oujna vein, Parallele vein.
- Sb-mineralization: independant from the first two ones, characterized by intense development of breccias; with stibnite, quartz, pyrite, chalcopyrite and baryte
32 valid minerals.
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
419.2 - 443.8 Ma
Age: Silurian (419.2 - 443.8 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. 
|Ordovician - Cambrian|
443.8 - 541 Ma
|Paleozoic sedimentary rocks|
Age: Paleozoic (443.8 - 541 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.