Geochemistry of trace and rare earth elements of the productive intrusions in the Kuh-Kapout porphyry copper deposit, Urumieh–Dokhtar magmatic arc.

Document Type : Original Article

Authors

1 دانشگاه شهید چمران اهواز

2 Department of Geology, Faculty of Earth Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran

3 دامغان، میدان سعدی، دانشگاه دامغان، دانشکده علوم زمین

4 Department of Geology, Shahid Chamran University of Ahvaz, Ahvaz, Iran

5 Management of research and technology of gol gohar mining and industrial company

6 shahid chamran university of ahvaz

10.22108/ijp.2024.141370.1332

Abstract

The Kuh-Kapout porphyry copper deposit is located in the southern part of the Urumieh–Dokhtar magmatic belt in the Kerman porphyry copper belt (KPCB) in the Jebal Barez area. Rock unites, including Eocene–andesite- dacite volcanic-sedimentary rocks with porphyry texture that intruded by late Eocene–Oligocene quartz diorite intrusive rocks and micro diorite dykes. Lithological and alteration studies show the widespread occurrence of copper sulfide mineralization in the quartz diorite intrusive rocks, especially in the potassic alteration zone in the form of pyrite and chalcopyrite. Mineralization is mainly in the form of quartz ± pyrite ± chalcopyrite ± magnetite veins. Arc-related magmatism with calc-alkaline series was determined by analysing the chemistry of rare earth elements and trace elements in the Th/Yb-Ta/Yb diagram of quartz diorite rocks. The absence of a significant negative anomaly in Eu and Sr are properties of the oxidant and fluid-rich magmatism. The relative enrichment of LILEs and LREEs relative to HFSEs and HREEs in duartz diorite rocks, suggested the conditions in which the hydrous metasomatized mantle was along with garnet and amphibole phases in the source. Studies reveal that the genesis of magma is a mantle composed of spinel + garnet lherzolite, and followed by partial melting event and subsequent shallow crystallisation of plagioclase. Geochemical evidence, including high values of Ba/Th compared to low values of Th/Nb in the quartz diorite intrusive rock, emphasizes the contamination of subducting slab material or the lower crust with magma. Evidence of arc-related and continental margin to collisional magmatism was revealed for tectonomagmatism.

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Petrological Journal

Articles in Press, Accepted Manuscript
Available Online from 17 July 2024

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History

  • Receive Date: 12 May 2024
  • Revise Date: 08 July 2024
  • Accept Date: 17 July 2024

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