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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:

Diamond
Formula: C
Reference: http://www.rexmining.be/rdmc/Pressroom/1999/1999_06_29_E.htm.
Diopside
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.
Ilmenite
Formula: Fe2+TiO3
Reference: Rex Diamond Mining Corp. Investors Brief.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Rex Diamond Mining Corp. Investors Brief.
Pyrope
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
Diamond1.CB.10aC
Group 4 - Oxides and Hydroxides
Ilmenite4.CB.05Fe2+TiO3
Group 9 - Silicates
Diopside9.DA.15CaMgSi2O6
var: Chromian Diopside9.DA.15Ca(Mg,Cr)Si2O6
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Pyrope9.AD.25Mg3Al2(SiO4)3
Unclassified Minerals, Rocks, etc.
Fayalite-Forsterite Series-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Diamond1.3.6.1C
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Pyrope51.4.3a.1Mg3Al2(SiO4)3
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
Diopside
var: Chromian Diopside
-Ca(Mg,Cr)Si2O6
'Fayalite-Forsterite Series'-

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
CCarbon
C DiamondC
OOxygen
O Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
O DiopsideCaMgSi2O6
O IlmeniteFe2+TiO3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O PyropeMg3Al2(SiO4)3
MgMagnesium
Mg Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Mg DiopsideCaMgSi2O6
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg PyropeMg3Al2(SiO4)3
AlAluminium
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al PyropeMg3Al2(SiO4)3
SiSilicon
Si Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Si DiopsideCaMgSi2O6
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si PyropeMg3Al2(SiO4)3
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Ca DiopsideCaMgSi2O6
TiTitanium
Ti IlmeniteFe2+TiO3
CrChromium
Cr Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
FeIron
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

Neogene
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]

Mesoarchean
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

References

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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