Geochemistry and hydrothermal evolution of the Mazraeh Shadi–Hizehjan precious and base metal deposit, northeastern Tabriz, Iran

Radmard, Kaikosrov; Zamanian, Hassan; Hosseinzadeh, Mahnaz; Khalaji, Ahmad Ahmadi

doi:10.1127/njma/2017/0059

Cited by 4 publications

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“…In the Mazraeh-e-Shadi area three types of lithologies are rep re sented (Radmard et al, 2017), as fol lows: Eocene pyroclastic rocks, Oligocene-Plio cene vol ca nic rocks, and Qua ter nary volcanogenic con glom er ate (ag glom er ate) and allu vial units.…”

Section: Epithermal Mineralizationmentioning

confidence: 99%

Geochemistry of skarn and porphyry deposits in relation to epithermal mineralization in the Arasbaran metallogenic zone, NE Tabriz, Iran

Alavi¹,

Radmard

Zamanian

et al. 2020

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Section: Epithermal Mineralizationmentioning

confidence: 99%

Geochemistry of skarn and porphyry deposits in relation to epithermal mineralization in the Arasbaran metallogenic zone, NE Tabriz, Iran

Alavi¹,

Radmard

Zamanian

et al. 2020

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“…3). Alteration associated with (Radmard et al, 2017). mineralisation is confined to thin halos of silicified rocks adjacent to the veins, bordered by argillic and propylitic zones outwards. Field mapping, microscopic study and XRD analysis (Table 3) have resulted in the recognition of five, zonally distributed hydrothermal alteration assemblages that consist of propylitisation, phyllic, argillic-advanced argillic alterations and potassic associated with silicification and ore deposition.…”

Section: Alterationmentioning

confidence: 99%

“…3. Map of alteration zones in the Mazra'eh Shadi-Heizehjan region (Radmard et al, 2017). crystallisation of a quartz-kaolinite-montmorillonite-chlorite assemblage.…”

Section: Alterationmentioning

confidence: 99%

“…Hydrothermal activity and the presence of faults and highly fractured breccia zones led to a range of alteration phenomena in Mazra'eh Shadi (Radmard et al, 2017;Fig. 3).…”

Section: Alterationmentioning

confidence: 99%

“…In the study area three types of lithologies are represented (Radmard et al, 2017;Fig. 2), as follows: 1. Eocene pyroclastic rocks, consisting especially of tuff and lava usually of an andesitic composition; (Fig.…”

Section: Geologymentioning

confidence: 99%

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Geochemistry and statistical analyses of porphyry system and epithermal veins at Hizehjan in northwestern Iran

et al. 2017

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Situated about 130 km northeast of Tabriz (northwest Iran), the Mazra’eh Shadi deposit is in the Arasbaran metallogenic belt (AAB). Intrusion of subvolcanic rocks, such as quartz monzodiorite-diorite porphyry, into Eocene volcanic and volcano-sedimentary units led to mineralisation and alteration. Mineralisation can be subdivided into a porphyry system and Au-bearing quartz veins within andesite and trachyandesite which is controlled by fault distribution. Rock samples from quartz veins show maximum values of Au (17100 ppb), Pb (21100 ppm), Ag (9.43ppm), Cu (611ppm) and Zn (333 ppm). Au is strongly correlated with Ag, Zn and Pb. In the Au-bearing quartz veins, factor group 1 indicates a strong correlation between Au, Pb, Ag, Zn and W. Factor group 2 indicates a correlation between Cu, Te, Sb and Zn, while factor group 3 comprises Mo and As. Based on Spearman correlation coefficients, Sb and Te can be very good indicator minerals for Au, Ag and Pb epithermal mineralisation in the study area. The zoning pattern shows clearly that base metals, such as Cu, Pb, Zn and Mo, occur at the deepest levels, whereas Au and Ag are found at higher elevations than base metals in boreholes in northern Mazra’eh Shadi. This observation contrasts with the typical zoning pattern caused by boiling in epithermal veins. At Mazra’eh Shadi, quartz veins containing co-existing liquid-rich and vapour-rich inclusions, as strong evidence of boiling during hydrothermal evolution, have relatively high Au grades (up to 813 ppb). In the quartz veins, Au is strongly correlated with Ag, and these elements are in the same group with Fe and S. Mineralisation of Au and Ag is a result of pyrite precipitation, boiling of hydrothermal fluids and a pH decrease.

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Evolution of the gold (copper) mineralization in the porphyry stock and the related skarn zones and epithermal veins in the Astarghan area, NW Iran: Evidence from fluid inclusion, mineral chemistry and sulfur isotope analyses

Ferdowsi

Calagari

Simmonds

et al. 2021

Ore Geology Reviews

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Geochemistry and hydrothermal evolution of the Mazraeh Shadi–Hizehjan precious and base metal deposit, northeastern Tabriz, Iran

Cited by 4 publications

References 0 publications

Geochemistry of skarn and porphyry deposits in relation to epithermal mineralization in the Arasbaran metallogenic zone, NE Tabriz, Iran

Geochemistry of skarn and porphyry deposits in relation to epithermal mineralization in the Arasbaran metallogenic zone, NE Tabriz, Iran

Geochemistry and statistical analyses of porphyry system and epithermal veins at Hizehjan in northwestern Iran

Evolution of the gold (copper) mineralization in the porphyry stock and the related skarn zones and epithermal veins in the Astarghan area, NW Iran: Evidence from fluid inclusion, mineral chemistry and sulfur isotope analyses

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