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Geology and mineralogy of the Cu−Ni−Co−U ore deposits at Talmessi and Meeskani, central Iran

Geologie und Mineralogie der Cu−Ni−Co−U-Lagerstätten von Talmessi und Meskani, Zentral-Iran

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Summary

Polymetallic hydrothermal veins and impregnations carry copper-iron sulphides (bornite, chalcopyrite, digenite, chalcocite) and nickel-cobalt arsenides (niccolite, rammelsbergite, safflorite, skutterudite) with bismuth and uranium as well as some copper arsenides (domeykite, koutekite etc.) in two dormant mines in the Anarak District. The geological and tectonic framework and the mineral associations of both occurrences have been investigated in detail. Both mineralizations can be attributed to Tertiary magmatism, but were deposited in two temporally distinct periods. The older copper sulphide mineralization is structurally controlled by pre-middle Ecocene tectonics and is linked to Eocene shoshonitic volcanism. The second, younger nickel-cobalt-silver-bismuth-uranium mineralization might be attributed to a granitic magmatism linked to a Miocene phase of movement.

Zusammenfassung

Polymetallische hydrothermale Gang- und Imprägnationsvererzungen bestehend aus Cu−Fe-Sulfiden (Bornit, Chalkopyrit, Digenit, Chalkosin) und Ni−Co-Arseniden (Niccolit, Rammelsbergit, Safflorit, Skutterudit) mit Bi und U sowie Kupfer-Arseniden (Domeykit, Koutektit usw.) kommen in zwei stillgelegten Minen im Anarak-Distrikt vor. Geologisch-tektonischer Rahmen und Mineralparagenesen beider Vorkommen werden im Detail untersucht. Insgesamt haben die Mineralisationen ihren Ursprung im tertiären Magmatismus, erfolgten jedoch wahrscheinlich in zwei zeitlich unterschiedlichen Perioden. Die ältere Cu-Sulfidvererzung wird strukturell durch eine prä-mitteleozäne Tektonik kontrolliert und hängt mit dem eozänen shoshonitischen Vulkanismus zusammen, während für die zweite jüngere Ni−Co−Ag−Bi−U-Mineralisation vermutlich eine miozäne Bewegungsphase mit Granitintrusionen verantwortlich zu machen ist.

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Author notes

  1. M. Tarkian

    Present address: Mineralogisch-Petrographisches Institut, Universität Hamburg, Grindelallee 48, D-2000, Hamburg 13, Federal Republic of Germany

  2. W. D. Bock

    Present address: Institut für Angewandte Geologie, Wichernstrasse 16, D-1000, Berlin 33

  3. M. Neumann

    Present address: Geologisches Landesamt Hamburg, Oberstrasse 88, D-2000, Hamburg 13, Federal Republic of Germany

Authors and Affiliations

  1. Mineralogisch-Petrographisches Institut, Universität Hamburg, Grindelallee 48, D-2000, Hamburg 13, Federal Republic of Germany

    W. D. Bock &  M. Neumann

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Tarkian, M., Bock, W.D. & Neumann, M. Geology and mineralogy of the Cu−Ni−Co−U ore deposits at Talmessi and Meeskani, central Iran. TMPM Tschermaks Petr. Mitt. 32, 111–133 (1983). https://doi.org/10.1007/BF01081105

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