EGU22-1555, updated on 23 May 2022
https://doi.org/10.5194/egusphere-egu22-1555
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Metallogeny of Manto-type Copper Deposits of Iran: A Possible Link to the Evaporitic basins

Sara Momenipour1, Abdorrahman Rajabi1, and Somaye Rezaei2
Sara Momenipour et al.
  • 1School of Geology, College of Science, University of Tehran, Tehran, Iran
  • 2Ravar Kooshan Industrial and Mining Company, Kerman 7651613556, Iran

Abstract

Iran is one of the most significant producers of copper in the world and hosts varieties of copper deposits, including porphyry Cu-Mo, vein-type, volcanogenic massive sulfide (VMS), sediment-hosted stratabound copper (SSC), Manto-type, and skarn.

Manto-type deposits are the second producer of copper in Iran, mostly hosted in basalt, basalt-andesite to andesite volcanic rocks. There are more than 40 Manto-type copper deposits and occurrences in Iran, such as Mari, Abbas-Abad, Vorezg, Robat, Simakan, and Sorkho, and most of them are economically deposits. Most of these deposits occur in Eocene volcanic rocks, and a small amount of them (such as KeshtMahki, Hassanabad, Khorjan, and Simakan) are hosted in the Early Cretaceous volcanic rocks that mainly concentrated in the Saveh-Yazd (in the Urumieh-Dokhtar magmatic belt), Qazvin-Zanjan, Sabzevar-Neishabour, Semnan-Shahroud volcanic zones, and eastern Iran.

The stratabound sulfide ores in these Manto-type copper deposits include chalcocite, chalcopyrite, and bornite, associated with covellite, malachite, atacamite, chrysocolla, and minor azurite in the oxidized and supergene ore zones. Sulfide mineralization usually occurs as a replacement in pyrites and feldspars, vein and veinless, and breccia, which is accompanied by carbonatization, propylitic, and minor sericite alterations. Geological and geochemical data indicate that most of these deposits formed within plate failed continental rift and back-arc extensional environments related to the subduction of the oceanic crust of neo-Tethys beneath the Iranian Plateau.

Furthermore, the temporal and spatial distribution of these deposits in terms of time shows a close relationship with evaporitic basins. This phenomenon suggests a genetic relationship between the formation of Manto-type deposits and the circulation of brines from adjacent evaporitic basins in shallow extensional tectonic environments.

How to cite: Momenipour, S., Rajabi, A., and Rezaei, S.: Metallogeny of Manto-type Copper Deposits of Iran: A Possible Link to the Evaporitic basins, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-1555, https://doi.org/10.5194/egusphere-egu22-1555, 2022.

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