List of Articles سولفید

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  1 - Sulfur source tracing of sulfide and sulfate minerals in fluorite Mines of the Elika Formation (East of Mazandaran Province): Implications of sulfur isotope
   
  Sulfur source tracing based on of sulfide (galena and pyrite) and sulfate (barite) mineralization in fluorite deposits of Elika Formation (East of Mazandaran Province) is studied. In present research. δ34S values vary between -1.82 – +12.49 ‰, +13.22 – +25.83 ‰ and +22. More

  Sulfur source tracing based on of sulfide (galena and pyrite) and sulfate (barite) mineralization in fluorite deposits of Elika Formation (East of Mazandaran Province) is studied. In present research. δ34S values vary between -1.82 – +12.49 ‰, +13.22 – +25.83 ‰ and +22.69 – +32.91 ‰ for galena, pyrite and barite, respectively. Regionally, although wide range of δ34S in sulfides is interpreted as isotopic heterogeneity of source and/or processes of reduced sulfur supply for sulfide mineralization in the studied area, but each deposit has narrow range of δ34S. Compared to sulfides, barites show isotopic homogeneity in heavier δ34S which are corresponding to evaporates from coexisted sea water (Middle-Upper Triassic; Paland Formation). Based on stratigraphic and mineralogical data of host rocks, co-existing evaporates of Triassic sea water and also diagenetic primary sulfates in matrix of host rocks (anhydrite, gypsum, barite) are introduced as the most probable sources of sulfur for sulfide mineralization in Shesh Rodbar and Era deposits. In contrast, contribution of organic matter and/or diagenetic primary pyrites had main role in generation of light δ34S values in Pachi Miana and Kamarposht deposits. Thermo-chemical reduction of digenetic primary sulfates and thermal decomposition of diagenetic primary sulfides as well as sulfur bonds in organic matter-bearing laminaes in the host rock are introduced as main processes for reduced sulfur supply in sulfide mineralization. Manuscript profile
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  2 - Sulfur source tracing of sulfide and sulfate minerals in fluorite Mines of the Elika Formation (East of Mazandaran Province): Implications of sulfur isotope
   Zabihitabar bahman shafiei  Mirnejad
  Sulfur source tracing based on of sulfide (galena and pyrite) and sulfate (barite) mineralization in fluorite deposits of Elika Formation (East of Mazandaran Province) is studied. In present research. δ34S values vary between -1.82 – +12.49 ‰, +13.22 – +25.83 ‰ and +22. More

  Sulfur source tracing based on of sulfide (galena and pyrite) and sulfate (barite) mineralization in fluorite deposits of Elika Formation (East of Mazandaran Province) is studied. In present research. δ34S values vary between -1.82 – +12.49 ‰, +13.22 – +25.83 ‰ and +22.69 – +32.91 ‰ for galena, pyrite and barite, respectively. Regionally, although wide range of δ34S in sulfides is interpreted as isotopic heterogeneity of source and/or processes of reduced sulfur supply for sulfide mineralization in the studied area, but each deposit has narrow range of δ34S. Compared to sulfides, barites show isotopic homogeneity in heavier δ34S which are corresponding to evaporates from coexisted sea water (Middle-Upper Triassic; Paland Formation). Based on stratigraphic and mineralogical data of host rocks, co-existing evaporates of Triassic sea water and also diagenetic primary sulfates in matrix of host rocks (anhydrite, gypsum, barite) are introduced as the most probable sources of sulfur for sulfide mineralization in Shesh Rodbar and Era deposits. In contrast, contribution of organic matter and/or diagenetic primary pyrites had main role in generation of light δ34S values in Pachi Miana and Kamarposht deposits. Thermo-chemical reduction of digenetic primary sulfates and thermal decomposition of diagenetic primary sulfides as well as sulfur bonds in organic matter-bearing laminaes in the host rock are introduced as main processes for reduced sulfur supply in sulfide mineralization. Manuscript profile
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  3 - Occurrence of native copper mineralization within the volcanic host rocks of the Garmabe Paein Cu-Ag volcanogenic massive sulfide deposit, southeast of Shahrood
  Majid Tashi
  The Garmabe Paein copper-silver volcanogenic massive sulfide (VMS) deposit is located 290 km southeast of Shahrood and occurred within the Upper Cretaceous volcano-sedimentary sequence in the Sabzevar subzone, north-east of Iran. Native copper mineralization occurred wi More

  The Garmabe Paein copper-silver volcanogenic massive sulfide (VMS) deposit is located 290 km southeast of Shahrood and occurred within the Upper Cretaceous volcano-sedimentary sequence in the Sabzevar subzone, north-east of Iran. Native copper mineralization occurred within the Cretaceous volcanic host rocks of the Garmabe Paein deposit including andesite-basalt with amygdaloidal texture, trachyandesite and volcanic breccia, and Paleocene conglomerate, as vein-veinlets and disseminated forms. Geochemical studies indicate that the volcanic rocks have basaltic compositions and calc-alkaline nature, deposited within a back-arc basin. Major wall rock alterations are dominated by chloritic and minor zeolitic mineralization. This study shows that diagenesis and burial process in the host volcano-sedimentary sequence produced relatively hot and brine fluids which leached copper from the volcanic rocks and deposited as native copper under reduced conditions within the Late Cretaceous andesit-basalt and trachyandesite and Paleocene conglomerate. Considering host rock types, mineralogy and alteration, the native copper mineralization in the Garmabe Paein deposit show most similarity with the native copper mineralization in the basaltic rocks (Michigan-type), which occurred slightly after formation of the Garmabe Paein VMS deposit during diagenesis, burial metamorphism and uplift. Manuscript profile
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  4 - Geochemistry of ore facies and alteration zoning pattern of the Varandan Ba-Pb-Cu volconogenic massive sulfide deposit, southwest of Qamsar
  Fayegh  Hashemi Fardin Mousivand Mahdi Rezaei-Kahkhaei
  The Varandan Ba-Pb-Cu deposit is located in southwest of Qamsar which is part of Urumieh-Dokhtar magmatic-arc zone. Mineralozation occurred as four sub-horizons in the unit1 of volcaniclastics and volcanics (acidic tuff and andesite) of Middle-Late Eocene. Each sub-hori More

  The Varandan Ba-Pb-Cu deposit is located in southwest of Qamsar which is part of Urumieh-Dokhtar magmatic-arc zone. Mineralozation occurred as four sub-horizons in the unit1 of volcaniclastics and volcanics (acidic tuff and andesite) of Middle-Late Eocene. Each sub-horizon consists of five ore facies including: 1) stringer zone, 2) vent complex zone, 3) massive zone, 4) bedded-banded zone and 5) hydrothermal-exhalative sediments of Fe and Mn bearing. Main wall rock alterations in the deposits include chloritic-quartz and quartz-sericitic. Alteration zoning is observed in the deposit as chloritic-quartz at the core and quartz-serisitic in the margins of the footwall of the ore sub-horizon. Electron microprob analysis (EPMA) on the chlorite in stringer zones of the second and third sub-horizons show that these chlorites are Fe-rich chlorite and close to the clinochlor field. Geochemical studies indicate that grades of Ag, As, Cu, Sb and Sr in the stratiform ore (bedded-banded and massive) of the third sub-horizon are much higher than the other sub-horizons, and are 41, 273, 1945, 390 and 1013 ppm, respectively. All geochemical studies show that metal zoning in this deposit is clear, this is characteristic of VMS deposits. Development of zone-refining and over refining processes caused leaching of Cu from the stringer zone and vent complex facies and its later precipitation in the bedded ore facies. Among across to different sub-horizons in the Varandan deposit, third sub-horizon is recognized as economic for Ag extraction . Manuscript profile
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  mohamad mahdi zand gholamreza mirzababaei Mohammad lotfi
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