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Banded Iron Formations and associated Detrital Iron Deposits of the Western Congo Craton

Bert De Waele, Mathieu Lacorde and Justin Rivers
Wednesday, September 30, 2015
First presented: 
SEG Conference, September 2015
The Congo Craton outcrops in Cameroon,Gabon and in the Republic of Congo where it is dominantly comprised of ArchaeanTonalite-Trondhjemite-Granodiorite (TTG) gneisses ranging ~3100–2800Ma. The northern portion is known as the NtemComplex, in Cameroon, and the southern portion as the East GabonianBlock comprised of a northern North Gabon Massif and a southern ChailluMassif. These two geological entities are separated by the PaleaoproterozoicFrancevillianSupergroup.
Greenstone belts comprised of Banded Iron Formations (BIF), metasedimentsand metavolcanicsare incorporated within the Archaean basement gneisses and are thought to have deposited between 2870 and 2750 Ma in Gabon.

Feature Author

Bert De Waele

Bert De Waele has over 23 years of structural mapping experience, mostly in African Precambrian terranes.  Bert’s regional mapping experience includes mapping 1:100,000 and 1:250,000 products in Zambia, Mauritania, Madagascar and Papua New Guinea, and prospect or tenement-scale mapping in Australia, Gabon, Ghana, Guinea, Indonesia, Ivory Coast, Lao PDR, Liberia, Mauritania, Morocco, Philippines, Republic of Congo, Sierra Leone, Western Sahara. Much of his work has included on-the-job training of sampling teams and mapping geologists using cutting-edge paperless mapping technologies

Principal Consultant (Structural Mapping)
PhD (Geology), RP Geo (Regional Geology, Mineral Exploration)
SRK Perth
Mathieu Lacorde

Mathieu Lacorde is a geologist with over six years of experience in mineral exploration. He conducted regional to prospect-scale geological and structural mapping for iron ore, base and precious metals in remote places of Africa (Gabon, Sierra Leone, Tanzania, Guinea and Mauritania), SE Asia (Indonesia, Malaysia) and South America. Mathieu was also involved in expert-driven and data-driven targeting studies in Australia and Ghana (uranium, gold and base metals). On several projects, Mathieu was responsible for drilling supervision and lithological/structural drill core logging (Guinea, Queensland, and Malaysia).

Senior Consultant (Geology)
MSc (Geosciences), MAIG
SRK Perth
SRK North America