Platinum-group elements in ores from the Kalmakyr porphyry Cu–Au–Mo deposit, Uzbekistan: bulk geochemical and laser ablation ICP-MS data

Platinum-group elements in ores from the Kalmakyr porphyry Cu–Au–Mo deposit, Uzbekistan: bulk geochemical and laser ablation ICP-MS data

We studied primary ore samples from Kalmakyr, a giant Cu–Au–Mo porphyry deposit in eastern Uzbekistan. Disseminated and stockwork-type high-grade Cu–Au–Mo mineralization showed average concentrations of 55 ppb Pd, 5.5 ppb Pt, 0.95 ppb Rh, 0.49 ppb Ir, and 4.1 ppm Au ( n  = 8). This type of mineraliz...

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Bibliographic Details
Published in:Mineralium deposita Vol. 45; no. 5; pp. 411 - 418
Main Authors: Pašava, Jan, Vymazalová, Anna, Košler, Jan, Koneev, Rustam I., Jukov, Alexander V., Khalmatov, Rustam A.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01-06-2010
Springer Nature B.V
Subjects:
Chemical elements
Data analysis
Earth and Environmental Science
Earth Sciences
Geochemistry
Geology
Gold
Letter
Mineral Resources
Mineralization
Mineralogy
Palladium
Platinum
Pyrite
Uzbekistan
Uzbekistan
Cu–Au–Mo porphyry deposit
Platinum-group elements
Kalmakyr
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Summary:We studied primary ore samples from Kalmakyr, a giant Cu–Au–Mo porphyry deposit in eastern Uzbekistan. Disseminated and stockwork-type high-grade Cu–Au–Mo mineralization showed average concentrations of 55 ppb Pd, 5.5 ppb Pt, 0.95 ppb Rh, 0.49 ppb Ir, and 4.1 ppm Au ( n  = 8). This type of mineralization is characterized by the presence of pyrite, chalcopyrite, molybdenite, and gold. A peak Pd content of 292 ppb was determined in a base-metal-rich quartz vein in granodiorite porphyry, which contains galena, sphalerite, chalcopyrite, tetrahedrite, and gold. Palladium correlates with Cu, Ag, Se, and S. Mineralogical and laser ablation ICP-MS study confirmed that Pd is homogeneously distributed in chalcopyrite, which contains up to 110 ppm Pd, and tetrahedrite, containing up to 20 ppm Pd. An assessment of the Pd and Pt budget at Kalmakyr showed the potential of approximately 17 t of Pd and 1.7 t of Pt.
ISSN:0026-4598
1432-1866
DOI:10.1007/s00126-010-0286-7