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Renco is a medium sized mine within the northern marginal zone of Limpopo Mobile Belt where it cuts the south-eastern margin of the Zimbabwe Craton. Reef zones bearing gold, together with bismuth, copper and iron sulphides are found in granulite facies rocks that are highly contorted. The reefs are transgressed by the foliation and isoclinal folding of the Archaean Limpopo Mobile Belt. The reefs are associated with a very fine grained brown to white, laminated quartz-magnetite granulite. The average reef width is 126 cm, with a grade of 9.4 g/t Au, 37 ppm Bi and 0.16 Cu. Production in 1994 was 2.1 t Au. The mine is owned and operated by Rio Tinto Zimbabwe.

The most recent source geological information used to prepare this summary was dated: 1997.    
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd.   Unauthorised copying, reproduction, storage or dissemination prohibited.

  References & Additional Information
   Selected References:
Blenkinsop T G, Frei R  1996 - Archean and Proterozoic mineralization and tectonics at the Renco mine (Northern Marginal Zone, Limpopo Belt, Zimbabwe): in    Econ. Geol.   v91, No. 7 pp 1225-1238
Blenkinsop T G, Kroner A and Chiwara V,  2004 - Single stage, late Archaean exhumation of granulites in the Northern Marginal Zone, Limpopo Belt, Zimbabwe, and relevance to gold mineralization at Renco mine : in    S. Afr. J. Geol.   v107 pp 377-396
Bohmke F C, Varndell B J  1986 - Gold in granulites at Renco mine, Zimbabwe: in Anhaeusser C R, Maske S, (eds),  Mineral Deposits of Southern Africa Geol. Soc. of South Africa, Johannesburg   v1 pp 221-230
Kisters A F M, Kolb J, Meyer F M  1998 - Gold mineralization in high-grade metamorphic shear zones of the Renco mine, southern Zimbabwe: in    Econ. Geol.   v93 pp 587-601
Kolb J, Kisters A F M, Hoernes S, Meyer F M   2000 - The origin of fluids and nature of fluid-rock interaction in mid-crustal auriferous mylonites of the Renco mine, southern Zimbabwe: in    Mineralium Deposita   v35 pp 109-125
Kolb J, Meyer F M  2002 - Fluid inclusion record of the hypozonal orogenic Renco Gold deposit (Zimbabwe) during the retrograde P-T evolution: in    Contrib. to Mineralogy & Petrology   v143 pp 495-509

Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge.   It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published.   While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo takes no responsibility what-so-ever for inaccurate or out of date data, information or interpretations.

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