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The Cayeli copper - zinc volcanogenic massive sulphide deposit is located in the Province of Rize of northeastern Turkey, near the Black Sea coast. The town of Cayeli, 4 km to the NNW, is at the mouth of the Buyukdere River and lies about 18 kilometres east of the city of Rize
(#Location: 41° 2' 18"N, 40° 46' 5"E).

Cayeli lies within the Madenkoy-Murgul string of volcanic hosted massive sulphide (VMS) deposits that extends along the Black Sea coast of eastern Turkey.

The deposit is of Cretaceous age, with a known strike length of more than 600 m, extends to a depth of at least 600 m and varies in thickness from a few to 80 m, averaging about 20 m. The average dip is 65° to the NNW, and is open down dip and to the north. The deposit occurs at the contact between altered footwall felsic volcanic flows and pyroclastic and hanging wall mafic volcanics.

Mineralisation occurs as massive and stockwork sulphides, and includes pyrite, chalcopyrite and sphalerite with lesser amounts of galena and tetrahedrite. The massive sulphide ore is classified as:
• Yellow Ore, which is copper-rich and zinc-poor;
• Black Ore that is zinc-rich and copper-poor; and
• Clastic Ore, which contains copper, zinc and precious metals. The sphalerite in the Clastic Ore contains inter-growths and inclusions of chalcopyrite.
  Stockwork ore containing pyrite and chalcopyrite in veins occurs stratigraphically below the massive sulphides.

At December 31, 2008, (Inmet Mining Annual Report, 2009):
    Proven + probable reserves totalled 9.29 Mt @ 3.6% Cu, 5.5% Zn, 0.6 g/ Au, 47 g/t Ag with
    Measured resources of 1.470 Mt @ 3.3% Cu, 3.2% Zn, 0.5 g/t Au, 26 g/t Ag
    Indicated resources of 2.50 Mt @ 3.0% Cu, 2.6% Zn, 0.5 g/t Au, 22 g/t Ag
    Inferred resources of 0.60 Mt @ 3.2% Cu, 9.4% Zn.

At December 31, 2016, (First Quantum Minerals Reserve and Resources statement, 2016):
    Proven + probable reserves totalled 4.7545 Mt @ 2.74% Cu, 1.75% Zn, 0.36 g/ Au, 16 g/t Ag with
    Measured resources of 7.066 Mt @ 2.93% Cu, 1.84% Zn, 0.42 g/t Au, 15.3 g/t Ag
    Indicated resources of 3.408 Mt @ 2.84% Cu, 2.19% Zn, 0.56 g/t Au, 19.0 g/t Ag
   Measured + Indicated resources of 10.475 Mt @ 2.90% Cu, 1.95% Zn, 0.47 g/t Au, 16.5 g/t Ag
    Inferred resources of 1.172 Mt @ 2.51% Cu, 4.80% Zn.

The most recent source geological information used to prepare this summary was dated: 2009.    
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

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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