Geochemical characteristics of igneous host rocks of Lubin-Zardeh Au-Cu deposit, NW Iran

Zamanian, Hassan; Rahmani, Shahram; Zareisahamieh, Reza; Pazoki, Amir; Yang, Xiaoyong

doi:10.1016/j.oregeorev.2020.103496

Cited by 5 publications

(3 citation statements)

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“…The Alborz magmatic belt contains extensive calc-alkaline and high-K calc-alkaline Eocene volcanic rocks (Berberian & King, 1981;Zamanian et al 2020), which resulted from collision of the Iranian block with the Eurasian plate due to continued convergence of the Arabian and Eurasian plates (Berberian, 1983; Alavi, 1991;Yigit, 2006;Zanchetta et al 2009;Richards, 2015;Zürcher et al 2019). Various deposits that are cited in the figure: 1.…”

Section: Regional Geologymentioning

confidence: 99%

“…Similar to its adjacent areas, the Alborz magmatic belt hosts a variety of ore deposit types, particularly epithermal polymetallic deposits (B Hajalilo, unpub. PhD thesis, Beheshti Univ., Iran, 1999;Mehrabi et al 2016;Tale Fazel et al 2019;Zamanian et al 2020), Kiruna-type deposits (Nabatian et al 2013), Mo-Cu-Au mineralized deposits related to I-type granitoids (Jamali et al 2009;Aghazadeh et al 2015), and fluorite deposits (Shafiei Bafti et al 2021). Most of these deposit types are spatially and temporally related to Eocene-Oligocene calc-alkaline magmatic rocks (Berberian & King, 1981;Nabatian et al 2014), generated in subduction-related and postsubduction settings associated with closure of the Neo-Tethyan Ocean basins (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…2019; Zamanian et al . 2020), Kiruna-type deposits (Nabatian et al . 2013), Mo–Cu–Au mineralized deposits related to I-type granitoids (Jamali et al .…”

Section: Introductionmentioning

confidence: 99%

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Fluid inclusions and C–H–O–S–Pb isotope systematics of the Senj Mo–Cu deposit, Alborz magmatic belt, northern Iran: implications for fluid evolution and regional mineralization

Fazel

Mehrabi²,

Zamanian³

et al. 2022

Geol. Mag.

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The Middle Eocene Senj Mo–Cu deposit (1.3 Mt at 1.5 wt % Cu and 0.2 wt % Mo) is located in the central Alborz magmatic belt, northern Iran. Mineralization is characterized by multistage veins, which are hosted in volcanic and volcano-sedimentary strata of the Karaj Formation (c. 41–45 Ma), genetically associated with the Senj Mafic Sill (c. 40 Ma). Four generations of veins are documented based on mineral assemblages and cross-cutting relationships, sequentially: quartz–biotite–chalcopyrite (QBC veins), quartz–molybdenum (QM veins), quartz–pyrite (QP veins) and late calcite (LC veins). Three types of fluid inclusions (FIs) are present in multistage veins: liquid-rich two-phase (L-type), vapour-rich two-phase (V-type) and solid-bearing multi-phase (S-type) inclusions. FIs in the QBC and QM veins are predominantly V-type and S-type, together with minor L-type, whereas the QP and LC vein minerals only contain L-type fluid inclusions. The homogenization temperatures of FIs from QBC to LC veins vary from 320 to 425 °C, 308 to 390 °C, 214 to 288 °C and 145 to 243 °C, and their salinities range from 5.3 to 49.0, 6.2 to 39.7, 5.7 to 13.0, and 2.1 to 7.2 wt % NaCl equiv., respectively. The H–O–C isotope compositions favour a dominantly magmatic origin for the hydrothermal fluids, which were gradually diluted by meteoric waters. The S–Pb isotope data of sulphide minerals indicate that the sulphur and metals were sourced from a deep-seated magmatic reservoir. The Senj Mafic Sill and associated Mo–Cu mineralization was developed in a back-arc extension regime, which faults and crustal fracture systems served as conduits for hydrothermal fluid circulation and Mo-rich veining.

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