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- W3009109243 endingPage "103444" @default.
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- W3009109243 abstract "• The Milajerd prospect in the Naein-Qom Magmatic Zone (central part of the UDMB) is a low-sulfidation epithermal prospect. • Polymetallic mineralization in the Milajerd area has a similar genesis to the epithermal low-sulfidation deposits. • Milajerd deposit occurs associated with the subduction of the Afro–Arabian and Iranian continental plates. The Milajerd Pb-Zn ± Au polymetallic prospect in Naein-Qom Magmatic Zone is a favorable target for exploration. Geological and geochemical characteristics such as setting, alteration assemblages, fluid inclusion microthermometry and stable isotopes are consistent with the Milajerd Pb-Zn ± Au polymetallic prospect being a typical low-sulfidation (LS) epithermal deposits. The Au-polymetallic mineralization occurs mainly as structurally controlled veins, and brecciated dikes, hosted by calc-alkaline volcanic rocks. Mineralization at the Milajerd prospect is controlled by an annular fault system. The sulfide mineralogy of the deposit includes sphalerite, galena, pyrite, arsenopyrite, and marcasite. The principal gangue minerals are quartz, calcite, sericite, and adularia. The alteration assemblages include quartz ± pyrite, quartz-sericite-pyrite and chlorite-calcite-epidote. Fluid inclusions in quartz-sulfide veins have homogenization temperatures (T h ) of 158–255 °C and salinities of 4.7–7.7 wt% NaCl equiv., whereas those in barren quartz ± carbonate veins yield T h values of 135–176 °C and salinities of 1.1–4.3 wt% NaCl equiv. The H and O isotopic composition (δD water = − 120 to − 92‰; inferred δ 18 O water = − 6.2 to 3.5‰) of fluid inclusions in quartz veins imply that cooling a mixed magmatic and meteoric waters was the main mechanisms of ore deposition at Milajerd deposit. The δ 34 S values of ore sulfides are mostly close to zero (avg. − 0.1‰), indicating a magmatic source of sulfur, which could have emanated directly from magmatic activity or have been leached from the surrounding volcanic rocks." @default.
- W3009109243 created "2020-03-13" @default.
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- W3009109243 date "2020-05-01" @default.
- W3009109243 modified "2023-09-26" @default.
- W3009109243 title "Geochemical, fluid inclusion and O–H–S isotope studies of the Milajerd Au-polymetallic prospect, Central Iran: Implications for ore genesis" @default.
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- W3009109243 doi "https://doi.org/10.1016/j.oregeorev.2020.103444" @default.
- W3009109243 hasPublicationYear "2020" @default.
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