Santa Rita

Goias, Brazil

Main commodities: Au
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The Santa Rita gold deposit is located in Central Goias, Brazil.

It is hosted by Meso- to Neoproterozoic carbonate-pelite sequences of the Paranoá Group that have been metamorphosed in the greenschist facies.

Ore occurs as pyrite-bearing quartz-carbonate veins which are structurally controlled by WNW-ESE high-angle faults and fractures resulting from the reactivation of older NE-SW lineaments.

Pyrite, which is the sole sulphide, exhibits growth zones enriched in Co, Ni and As (up to 4 wt%). Hydrothermal alteration zones are enriched in Co, Ni and As and are characterised by diffuse albitisation, carbonatisation, silicification and pyritisation.

The most recent source geological information used to prepare this summary was dated: 1993.    
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:
Giuliani G, Olivo G R, Marini O J and Michel D  1993 - The Santa Rita gold deposit in the Proterozoic Paranoa Group, Goias, Brazil: An example of fluid mixing during ore deposition: in    Ore Geology Reviews   v8 pp 503-523
Michel D, Giuliani G, Olivo G B and Marini O J,  1994 - As growth banding and the presence of Au in pyrites from the Santa Rita gold vein deposit hosted in Proterozoic metasediments, Goias State, Brazil: in    Econ. Geol.   v89 pp 193-200

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at the time of compilation and subsequent updating, PorterGeo takes no responsibility what-so-ever for inaccurate or out of date data, information or interpretations.

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