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Tenoumer concession (Tenoumer kimberlite), Tenoumer area, Tiris Zemmour Region, Mauritania

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Latitude & Longitude (WGS84): 22° 55' 7'' North , 10° 24' 24'' West
Latitude & Longitude (decimal): 22.91864,-10.40669
GeoHash:G#: eu0d7hnnf
Köppen climate type:BWh : Hot deserts climate

This concession was the site of the first diamond bearing kimberlite discovered in Mauritania (1999). This kimberlite is a coarse-grained tuff breccia. Discovery was based on a 300 meter diameter aeromagnetic anomaly. The pipe is covered by 1.5 meters of loose dune sand. The top 0.5 meters of the kimberlite is intensely calcreted with underlying kimberlite containing ilmenite, olivine, phlogopite as well as ultramafic nodules. A second pipe was discovered nearby. Both of these pipes are within a still larger, circular aeromagnetic anomaly indicating perhaps a common, much larger kimberlite pipe. To date, 4 kimberlite pipes have been discovered by the Rex Diamond Mining Corp., Ltd., concession holder, on this concession.
Located in the Reguibat Shield.

Regions containing this locality

Sahara Desert, North Africa

Desert - 711 mineral species & varietal names listed

West Africa

UN Subregion - 518 mineral species & varietal names listed

Northwest Africa Meteorites

Meteorite Fall Location - 831 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

5 valid minerals.

Detailed Mineral List:

Formula: C
Reference: http://www.rexmining.be/rdmc/Pressroom/1999/1999_06_29_E.htm.
Formula: CaMgSi2O6
Reference: http://www.rexmining.be/rdmc/Pressroom/1999/1999_06_29_E.htm; Rex Diamond Mining Corp. Investors Brief.
Diopside var: Chromian Diopside
Formula: Ca(Mg,Cr)Si2O6
Reference: http://www.rexmining.be/rdmc/Pressroom/1999/1999_06_29_E.htm; Rex Diamond Mining Corp. Investors Brief.
'Fayalite-Forsterite Series'
Reference: Rex Diamond Mining Corp. Investors Brief.
Formula: Fe2+TiO3
Reference: Rex Diamond Mining Corp. Investors Brief.
Formula: KMg3(AlSi3O10)(OH)2
Reference: Rex Diamond Mining Corp. Investors Brief.
Formula: Mg3Al2(SiO4)3
Reference: http://www.rexmining.be/rdmc/Pressroom/1999/1999_06_29_E.htm; Rex Diamond Mining Corp. Investors Brief; .

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Group 4 - Oxides and Hydroxides
Group 9 - Silicates
var: Chromian Diopside9.DA.15Ca(Mg,Cr)Si2O6
Unclassified Minerals, Rocks, etc.
Fayalite-Forsterite Series-

List of minerals arranged by Dana 8th Edition classification

Semi-metals and non-metals
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Unclassified Minerals, Rocks, etc.
var: Chromian Diopside
'Fayalite-Forsterite Series'-

List of minerals for each chemical element

H PhlogopiteKMg3(AlSi3O10)(OH)2
C DiamondC
O Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
O DiopsideCaMgSi2O6
O IlmeniteFe2+TiO3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O PyropeMg3Al2(SiO4)3
Mg Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Mg DiopsideCaMgSi2O6
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg PyropeMg3Al2(SiO4)3
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al PyropeMg3Al2(SiO4)3
Si Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Si DiopsideCaMgSi2O6
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si PyropeMg3Al2(SiO4)3
K PhlogopiteKMg3(AlSi3O10)(OH)2
Ca Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Ca DiopsideCaMgSi2O6
Ti IlmeniteFe2+TiO3
Cr Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Fe IlmeniteFe2+TiO3

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

2.588 - 23.03 Ma

ID: 3187703
Cenozoic sedimentary rocks

Age: Neogene (2.588 - 23.03 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]

2800 - 3200 Ma

ID: 3310973

Age: Mesoarchean (2800 - 3200 Ma)

Lithology: Plutonic

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

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


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rombouts, L. (2003) Distribution of diamonds and kimberlites on the Reguibat Craton, Mauritania. In: 8th International Kimberlite Conference, Victoria Canada, Abstracts p.14.

External Links

- http://www.rexmining.be/rdmc/Pressroom/1999/1999_06_29_E.htm (The Wall Street Transcript, CEO/Company Interview, Serge Muller, Rex Diamond Mining Corp. (Oct 25, 1999); Rex Diamond Mining Corp. Investors Brief)
- http://www.rexmining.com/rdmc/Company/Exploration/Mauritania.htm
- http://www.diamondtalk.com/forums/showthread.php?threadid=4911.

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