Next Article in Journal
Striving Toward a Circular Economy for Phosphorus: The Role of Phosphate Rock Mining
Next Article in Special Issue
3D Modeling of the Epembe (Namibia) Nb-Ta-P-(LREE) Carbonatite Deposit: New Insights into Geometry Related to Rare Metal Enrichment
Previous Article in Journal
Carbonaceous Materials in the Fault Zone of the Longmenshan Fault Belt: 2. Characterization of Fault Gouge from Deep Drilling and Implications for Fault Maturity
Previous Article in Special Issue
Geochemical Characterization, Geochronology, and Geodynamic Implications of Grenville Rare Earths Bearing Syenites, Haut-Saint-Maurice, QC, Canada
Open AccessArticle

Geology and U-Th-Pb Dating of the Gakara REE Deposit, Burundi

Géosciences Rennes-UMR 6118, University Rennes, CNRS, F-35000 Rennes, France
Earth Sciences Department, University of Burundi, 2700 Bujumbura, Burundi
Institut des Sciences de la Terre d’Orléans (ISTO) Université d’Orléans·CNRS·BRGM, UMR 7327, 1A rue de la Férollerie, CS 20066, F-45071 Orléans CEDEX 2, France
Rainbow Rare Earths, 3 Boulevard du Japon, Bujumbura, Burundi
Author to whom correspondence should be addressed.
Minerals 2018, 8(9), 394;
Received: 27 June 2018 / Revised: 4 September 2018 / Accepted: 5 September 2018 / Published: 7 September 2018
(This article belongs to the Special Issue Toward Mineral Systems for HFSE Rare Metals)
The Gakara Rare Earth Elements (REE) deposit is one of the world’s highest grade REE deposits, likely linked to a carbonatitic magmatic-hydrothermal activity. It is located near Lake Tanganyika in Burundi, along the western branch of the East African Rift. Field observations suggest that the mineralized veins formed in the upper crust. Previous structures inherited from the Kibaran orogeny may have been reused during the mineralizing event. The paragenetic sequence and the geochronological data show that the Gakara mineralization occurred in successive stages in a continuous hydrothermal history. The primary mineralization in bastnaesite was followed by an alteration stage into monazite. The U-Th-Pb ages obtained on bastnaesite (602 ± 7 Ma) and on monazite (589 ± 8 Ma) belong to the Pan-African cycle. The emplacement of the Gakara REE mineralization most likely took place during a pre-collisional event in the Pan-African belt, probably in an extensional context. View Full-Text
Keywords: U-Th-Pb dating; REE deposit; bastnaesite; monazite; Gakara; Burundi U-Th-Pb dating; REE deposit; bastnaesite; monazite; Gakara; Burundi
Show Figures

Figure 1

MDPI and ACS Style

Ntiharirizwa, S.; Boulvais, P.; Poujol, M.; Branquet, Y.; Morelli, C.; Ntungwanayo, J.; Midende, G. Geology and U-Th-Pb Dating of the Gakara REE Deposit, Burundi. Minerals 2018, 8, 394.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop