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Uranium explorationUranium explorationIn CameroonIn Cameroon

Bantandje

Essong

Ekomedion

Mbanga

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According to the geological map of South-West Cameroon the major part of the Essong licence is represented with “Roches paraderivees pro parte: Serie rubanee” with the following rock types :

Granulitic gneissLeptiniteEnderbites (or alkali charnockite) MangeriteDyke rocksBanded Iron Formation (BIF –Itabirite)

Six BRGM uranium occurrences were the basis for this licenceOf these, only one was „positive“

EssongEssong

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Gamma ray spectromety measurements (K, eU, eTh) and radon and thorn in soil gas

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0 7 15 22 30 37 45 52 60 67 74 82

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Geochemical map of eU (ppm)

Probability plot of eUHistogram for eU

Basic conclusions•High correlation coefficient for eU – K = 0.7•High spatial correlation between U and K•Five points with the highest U values (>15 ppm) show a very high correlation with K (r = 0.9), •Both an indication of K metasomatism and U vein type deposit•All high eU values in regions of charnockite

Geochemical map of K (%)

Geochemical map of Rn in soil (cpm)

Rn vs. eU: High eU and absence of high Rn is due to a poor soil coverage and numerous outcrops in the western zone.

Scope:1000 km2

135 gamma-ray spectrometry measurements45 measurements of Radon and Thoron in soil gas (large areas represented with swamps)

Essong

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A part of the equipment used:•Gamma-ray spectrometers (3)•Radon- Thoron measurements instruments (2) in•soil gas•Radon- Thoron measurements instruments (2) in•water•Kappometers for magnetic susceptibility•Laptops, printers•GPS

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Combined geochemical stream sediment survey Scope:•Three exploration licenses covering 3000 km2 (two AAR and one Ridgeway Energy)•ICP-MS for 42 elements•247 stream sediment samples

Some statistical resultsFactor analysis with 9 factors gave the following high loadings per factor

•Factor 1: Base and transition metals•Factor 2: Mn – Nb – Ti•Factor 3: U – K – Rb•Factor 4: Ca – Mg•Factor 5: Co – Ni•Factor 6: Ag – Cd•Factor 7: Ce – La•Factor 8: Cr•Factor 9: W

Basic conclusions:•The association of metals per factor comply well with known geochemical associations•The factor score maps show a high spatial correlation with the geology•High Factor 3 scores are located in or in the vicinity of charnockite in the Eastern part of the licenses•A general trend of values from the west to the east also indicate that not all charnockite is uranium bearing

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Factor 3 (U-K-Rb) scores map

7The road to Essong

Some pics

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Swamp

Location for stream sediment sampling

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Q: What is the difference?A: The TOYOTA is not the same!

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Collecting a stream sediment sample

Team at work

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Ndime, Isaac, where is the GPS?

Is anybody thirsty?

12From here it’s on foot

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Quinine

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Our hotel. Auberge “Club 25”

Yes, this is a Russian VOLGA

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Basic GeologyMajor rock units•Granite•Granodiorite and diorite•Gneiss•Gabbro•SchistMinor rock units•Conglomerates•Andesite•Rhyolite•Syenite•Amphibolite•Quartz

Two uranium occurrences registered by BRGM (both proved to be negative)

Aprox. 20 km NW of the Kitongo uranium deposit

500 km2

Bantandje Bantandje

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Gamma ray spectromety measurements (K, eU, eTh) and radon and thorn in soil gas

No. of measured points with gamma-ray spectrometry (TC, K, eU and eTh)

159

No. of measured points for radon and thoron in soil gas

91

No. of magnetic susceptibility measurements

87

eU map

eTh mapRn in soil gas

Scope

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Basic statistics

Correlation matrix  TC K(%) eU(ppm) eTh(ppm) SITC 1 0.37 0.68 0.65 0.05K(%) 0.37 1 0.49 0.38 0.14eU(ppm) 0.68 0.49 1 0.91 0.08eTh(ppm) 0.65 0.38 0.91 1 0.06SI 0.05 0.14 0.08 0.06 1

  N Mean Minimum Maximum Std.Dev.

TC (cps) 154 788.97 140 11058 1181.38K(%) 154 2.91 0 7.2 1.72

eU(ppm) 154 4.44 0 44.5 6.19eTh(ppm) 154 25.29 1 352.7 50.35

SI 87 6.26 0.04 105 15.75

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U (ppm)

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Some statistical data

Scatter plot eU - eTh

Histogram eU(ppm)

Conclusions:High eTh, low eUHigh correlation between eU and eThFavorability: low

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The concentration of high/anomalous values in or near the zones of the faults is

evident.

Spatial correlationSpatial correlationeU

Radon Thoron

SRTM

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“Mud cracks” in granite in a fault zone

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Some pics

The town of Poli (main street)

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Field measurements

22Hossere Gode Mountain

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A typical village in N. Cameroon

Bush fire

24Unnecessary, but Just in case

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Granite outcrop

More granite

Pegmatite

26“Flowers”