Intermediate sulfidation epithermal Pb-Zn-Cu (±Ag-Au) mineralization at Cheshmeh Hafez deposit, Semnan province, Iran

Mehrabi, Behzad; Siani, Majid Ghasemi

doi:10.1007/s12594-012-0177-x

Cited by 25 publications

(6 citation statements)

References 26 publications

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“…For example, the homogenization temperatures of primary inclusions in quartz from the Aginskoye deposit (LS type) were 230-280 • C, with the ore phase being in the range of 250-260 • C [59]. Similar temperature ranges have been established both for the LS type deposits (Rodnikovoye and Asachinskoye in South Kamchatka, Russia) [19,21,60] and in regard to the IS type deposit (Cheshmeh Hafez, Iran) [61], the homogenization temperatures of the primary inclusions are in the range of 140-280 • C with peaks at around 180-250 • C. This is also compatible with all HS type deposits, and with the obtained formation parameters of the Maletoyvayam deposit (Table 5).…”

Section: Discussionmentioning

confidence: 79%

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Gold Mineralization at the Maletoyvayam Deposit (Koryak Highland, Russia) and Physicochemical Conditions of Its Formation

et al. 2020

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Microthermometry study of fluid inclusions in quartz veins of the Maletoyvayam deposit (Koryak Highland, Russia) was carried out. This epithermal gold deposit contains unique Au compounds including maletoyvayamite, which has not been reported anywhere else. Two paragenetic mineral associations (pyrite-quartz and maletoyvayamite-quartz) with quartz of different generations corresponding to different pulses were also described. Only early generations of quartz (Q1) include ore minerals: pyrite for the first mineral assemblage, and in Au-bearing minerals, sulfosalts, bismuthinite, and others—for the second assemblage. A study on fluid inclusions in quartz showed a salinity (mainly NaCl + KCl) range from 0.2 to 4.3 wt.% NaCl eq., increasing from the first mineral association to the second due to boiling fluids. The obtained temperature variations for quartz crystallization were 295–135 °C, the fluid pressure ranged from 79 to 4 bar. On the other hand, the range of conditions obtained for the gold productive ore association is more narrow: salinity of the fluid inclusions is 4.3 wt.% NaCl eq., the temperatures vary from 255 °C to 245 °C, and the pressure from 39 to 32 bar. These physicochemical characteristics of the Maletoyvayam ore deposit greatly coincide with other HS-type epithermal deposits; however, within the Central Kamchatka Volcanic Belt it is so far the only deposit of this type reported.

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Section: Discussionmentioning

confidence: 79%

“…In the IS-type epithermal deposits, salinity ranges vary widely and reaches high values, for example, 4.7-18 wt.% NaCl eq. at the Cheshmeh Hafez field [61]. While the salinity in inclusions from LS-type deposits of the Aginskoye deposit of the Central Kamchatka volcanic belt is no more than 2 wt.% NaCl equiv.…”

Section: Discussionmentioning

confidence: 92%

Gold Mineralization at the Maletoyvayam Deposit (Koryak Highland, Russia) and Physicochemical Conditions of Its Formation

et al. 2020

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“…In terms of ore mineralization, the eastern and western sections of the Alborz Magmatic Belt show clear differences. For example, the eastern section is devoid of major porphyry copper, molybdenum, iron, and gold deposits with the exception of low-grade mineralization in the Troud-Chah Shirin zone [32]. In contrast, volcanic and plutonic rocks found in the western section of the Alborz Magmatic Belt are highly mineralized.…”

Section: Regional Geological Settingmentioning

confidence: 99%

Geochemistry and geochronology of thevolcano-plutonic rocks associated with the Glojehepithermal gold mineralization, NW Iran

et al. 2015

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Eocene to Oligocene volcano-plutonic rocks are widespread throughout NW Iran. The Tarom-Hashtjin metallogenic province is one of the most promising epithermal-porphyry ore mineralized districts in NW Iran. The Glojeh gold deposit, located in the center of this province, is a typical high to intermediate sulfidation epithermal system, spatially and temporally associated with a granite intrusion and associated high-K calc-alkaline to shoshonitic volcano-plutonic rocks. The intrusive complexes of the Glojeh district are characterized by: SiO 2 contents of 60.9 to 70.7 wt.%, K 2 O+Na 2 O of 7.60 to 8.92 wt.%, and K 2 O/Na 2 O ratios of 0.9 to 1.8. They are enriched in light rare earth elements (LREEs), and large ion lithophile elements (LILEs), depleted in high field strength elements (HFSEs), and have weak negative Eu anomalies (Eu/Eu*= 0.5 to 0.9).40 Ar/ 39 Ar geochronology applied to biotite and feldspar, separated from two intrusives (Goljin and Varmarziar), and two feldspar aliquots separated from hydrothermal veins at North Glojeh and South Glojeh, was carried out to constrain magmatic and hydrothermal events. Plagioclase (± sericite), from North Glojeh and South Glojeh produced ages (42.20±0.34 Ma, and 42.56±1.47 Ma respectively) that overlap with the age of the Goljin intrusion (41.87±1.58 Ma). Geochemical data for the volcano-plutonic rocks in the Glojeh district, that have87Sr/86Sr isotopic compositions that range from 0.706344 to 0.708331, suggest an origin involving partial melting of a depleted mantle source during Neo-Tethyan subduction.

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“…Jones et al 2007), and even global climate change (Svensen et al 2008). The TCS magmatic arc hosts many epithermal ore deposits (Rashidnejad-Omran, 1992;Sengör et al 1993;Tajeddin, 1999;Shamanian et al 2004;Fard et al 2006;Imamjome et al 2009;Mehrabi & Ghasemi, 2012;Mehrabi et al 2015). In this paper we report a detailed petrogenetic investigation of the Chah-Musa district undertaken as a strategy for effective exploration.…”

Section: Introductionmentioning

confidence: 93%

Ballooning emplacement and alteration of the Chah-Musa subvolcanic intrusion (NE Iran) inferred from magnetic susceptibility and fabric

Seifivand

Sheibi

2019

Geol. Mag.

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The porphyritic diorite Chah-Musa subvolcanic intrusion is located in the Toroud-Chah Shirin magmatic arc in the northern Central Iranian structural zone. The elliptical Chah-Musa body hosts a copper deposit and intrudes an Eocene sequence of volcanic breccia, agglomerate and red tuffaceous sediment. High magnetic susceptibility values are attributed to the presence of magnetite as a magnetic carrier. Changes in bulk magnetic susceptibility correlate with zonation of alteration in the intrusion. Although the degree of anisotropy of magnetic susceptibility decreases due to hydrothermal alteration, the field observations confirm that this parameter can be used as a strain marker. Strongly oblate magnetic ellipsoids are found in the eastern half of the intrusion where isolated outcrops of flat-lying tuffaceous host cover dioritic rocks (roof zone). Stations with prolate ellipsoids mostly belong to the centre of the intrusion where the magnetic lineations plunge steeply. They are interpreted as indicating the main feeder zone. The concentric fabric pattern at the periphery of intrusion, the oblate magnetic ellipsoids at the roof, the highest anisotropy degree along the small diameter of the intrusion, and an intense deformation of the host rocks, especially at the western margin, all are evidence that the intrusion was ballooning during the late stages of its emplacement. Ascent and emplacement of the Chah-Musa body is ascribed to the tensional space provided by a dextral shear zone created by the regional left-lateral movement on the bounding Anjilow and Toroud strike-slip faults.

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Intermediate sulfidation epithermal Pb-Zn-Cu (±Ag-Au) mineralization at Cheshmeh Hafez deposit, Semnan province, Iran

Cited by 25 publications

References 26 publications

Gold Mineralization at the Maletoyvayam Deposit (Koryak Highland, Russia) and Physicochemical Conditions of Its Formation

Gold Mineralization at the Maletoyvayam Deposit (Koryak Highland, Russia) and Physicochemical Conditions of Its Formation

Geochemistry and geochronology of thevolcano-plutonic rocks associated with the Glojehepithermal gold mineralization, NW Iran

Ballooning emplacement and alteration of the Chah-Musa subvolcanic intrusion (NE Iran) inferred from magnetic susceptibility and fabric

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