Cassiterite and columbo-tantalite (Coltan) mineralisation in the Proterozoic rocks of the northern part of the Kibara orogen (Central Africa): preliminary results
| dc.contributor.author | Dewaele, S. | |
| dc.contributor.author | Fernandez-Alonso, M. | |
| dc.contributor.author | Tack, L. | |
| dc.date | 2008 | |
| dc.date.accessioned | 2016-03-15T10:03:07Z | |
| dc.date.available | 2016-03-15T10:03:07Z | |
| dc.identifier.issn | 0001-4176 | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/196 | |
| dc.description | The Central African Kibara orogen extends from the southeastern part of Uganda to the southern part of the Democratic Republic of Congo (DRC). It forms a met- allogenic province that hosts different types of granite-related mineralization: cassiterite, columbite-tantalite, wolframite, gold, monazite, amblygonite, beryl, etc. These minerals are present in different types of mineralization. The minerals occur as primary mineraliza- tion in quartz veins and pegmatites, but also as secondary mineralization in alluvial or elu- vial deposits. In this study, we focus on the metallogeny of the primary tin and columbite- tantalite mineralization in the northern part of the Kibara orogen (Rwanda, Burundi, Uganda, Tanzania, Maniema and Kivu in the DRC). Based on a systematic overview of mining data in the archives of the RMCA, field work, petrography, geochemical, miner- alogical and microthermometric investigations of ore and gangue minerals and based on a comparison with recent ore-forming models of granite-related ore deposits, a preliminary metallogenic model is proposed. The main granite generation G1-3 intruded at 1380 +/- 10 Ma in the Palaeo- and Mesoproterozoic rocks of the Kibara orogen. At ~986 Ma, the youngest G4 granite gener- ation formed. Although historically called tin -granite, this granite generation is not min- eralized. After consolidation of the G4-granite, pegmatites were emplaced (~ 960 Ma). Some of these pegmatites are mineralized in columbite-tantalite. At ~940 Ma, cassiterite- mineralized quartz veins formed. In the pegmatite area, this hydrothermal phase resulted in an intense alteration of the pegmatitic bodies. | |
| dc.language | eng | |
| dc.publisher | Royal Academy for Overseas Sciences | |
| dc.title | Cassiterite and columbo-tantalite (Coltan) mineralisation in the Proterozoic rocks of the northern part of the Kibara orogen (Central Africa): preliminary results | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.subject.free | Geodynamics and mineral resources | |
| dc.subject.free | PROMINES | |
| dc.source.title | Bull. Scéanc. Acad.R. Sci. Outre-Mer | |
| dc.source.volume | 54 | |
| dc.source.page | 341-357 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.rmca | 177 |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||