List of Articles Mehadi Moradi

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  1 - Study of mineralization and origin of Pliocene conglomerate hosted strata bound sedimentary Cu mineralization in the Ghareh-Aghaj, Maku
  Mehadi Moradi  Maghfouri  Moaid  Ashrati
  The study area is located in the Northwest of Iran and North of Khoy Ophiolite Belt. Rocks of the Ghareh-Aghaj region include Qum formation, Upper Red Formation and Pliocene conglomerate. Pliocene rock units consist of siltstone, sandstone (arkose and lithic arenite) an More

  The study area is located in the Northwest of Iran and North of Khoy Ophiolite Belt. Rocks of the Ghareh-Aghaj region include Qum formation, Upper Red Formation and Pliocene conglomerate. Pliocene rock units consist of siltstone, sandstone (arkose and lithic arenite) and microconglomerate- conglomerate. Pliocene cicroconglomerate- conglomerate hosted strata bound copper mineralization in the Ghareh Aghaj region, but the mineralization is partially seen in the sandstone unit. Much of the mineralization in the study area is open space filling and disseminated. Ore mineralogy of Ghareh-Aghaj is very simple and contains of native copper, cuprite and tenorite. Lack of copper sulfides, the absence of plant fossils as reducing agent, and the non-occurrence of copper replacement instead of plant tissues, occurance of mineralization as the open space filling and cement grain and formation of native copper as the main ore, all represent the dissimilarity of Ghareh-Aghaj Cu mineralization with Redbed type sedimentary copper deposits. Formation of Ghareh-Aghaj copper deposit can be explained as follows: Pore water formation of diagenetic processes within the Upper Red Formation caused the leaching of copper from this sequence and the formation of copper chloride complexes. Increasing of water table caused the development of reducing conditions in the Pliocene conglomerate. Therefore entrance of Copper-bearing fluids caused native copper deposition below the water table. Decreasing of groundwater table and exposure of native copper to the oxidizing conditions caused the replacement of cuprite, malachite and azurite with native copper. Manuscript profile
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  2 - Investigation of geochemistry of minor and trace elements (rare earths) in the base metal vein mineralization Yaralujeh area (NW Ahar - East Azarbaijan)
  Zohreh Jabarzadeh Mehadi Moradi  Moayyed Zargar Faramarzi
  The Yaralujeh vein index is located about 40 km NW of Ahar, East Azarbaijan. Based on geochemical studies, the original host rock is microdioritic in composition with calc – alkaline character, situated in an active continental margin volcanic arc. The mineralization i More

  The Yaralujeh vein index is located about 40 km NW of Ahar, East Azarbaijan. Based on geochemical studies, the original host rock is microdioritic in composition with calc – alkaline character, situated in an active continental margin volcanic arc. The mineralization is occurred as disseminated, stockwork and veins - veinlets containing quartz, carbonate and sulfide minerals in altered subvolcanic rocks (microdiorite). Pyrite, sphalerite, galena and chalcopyrite are the most important sulfide minerals in this area. The most important alerations in this area are sericitic and carbonatization, and the main alteration minerals are quartz, sericite, illite, albite, kaolinite, leucoxene, pyrite and late carbonates. Bivariate diagrams of Ba + Sr vs. Ce + Y + La and Zr vs. TiO2 and also values less than one for TiO2 indicate a hypogenic origin for altered fluids. The spider diagrams of REEs, normalized to both chondrite and average upper continental crust, show differentiation of LREE from HREE and depletion of LREE relative to average upper continental crust. Based on geochemical indicators such as Hf / Sm, Nb / La and Th / La and LREE enriched relative to the HREE, the most important ion complexes transition metal are Cl- complexes. Ce, Eu and Pr (Eu/Eu*, Ce/Ce*, Pr/Pr*) anomalies in ore-bearing vein and host rock indicates near-neutral pH in a redox environment for the alteration fluids in Yaralujeh Index. Manuscript profile
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  3 - Introduction of Mari Copper Deposit as a Stratabound Manto-Type Copper Deposit in Tarom Zone, Northwest of Iran
  Mehadi Moradi Sajad Maghfori Mohsen Moayyed Vahid Faridasl
  Similar to other deposits of this type in the world, three major stages could be considered for mineralization in Mari copper deposit. The Mari Copper deposit is located in the northwest of Iran and Tarom metallogenic zone in the north of Zanjan. The ore-body is strata- More

  Similar to other deposits of this type in the world, three major stages could be considered for mineralization in Mari copper deposit. The Mari Copper deposit is located in the northwest of Iran and Tarom metallogenic zone in the north of Zanjan. The ore-body is strata-bound and hosted by the Eocene mega-porphyritic andesites. The major copper sulfides are bornite, chalcocite, and chalcopyrite associated mainly with pyrite that represent open-space filling, disseminated, vein-veinlet, and replacement textures. The volcanic rocks of the study area mostly represent intermediate to acidic composition with high potassium shoshonitic magmatic series related to intra-arc rift environments. Wall rock alterations include carbonatization, chloritization, epidotization, and sericitization. The abundances of Cu and Ag in fresh mega-porphyritic andesite are up to 3200 and 216 ppm respectively. Based on the main characteristics of Mari ore body such as tectonic setting, host rock, strata-bound form, mineralogy, metal content, and wall rock alterations and comparison of these features with Manto - type copper deposits, Mari Cu deposit can be introduced as a Manto -type Cu deposit in NW Iran. The first stage includes submarine volcanic activity and eruption of mega-porphyritic andesitic lava associated with regional propylitic alteration. In the second stage, the early diagenesis and the activity of sulfate-reducing micro-organisms resulted in the generation of pyrite in the form of open-space filling and disseminated in the mega-porphyritic andesite. Finally, in the third stage, increasing of the thickness of sediments, basin subsidence, and burial diagenesis accompanied with the entry of metal-rich fluids into the reduced host rock, caused the replacement of the first stage pyrites by copper sulfides and mineralization in the Mari deposit. Manuscript profile
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  4 - Mineral chemistry and Petrology of shoshonit gabbroic bodies from the Hashtsar-Leghlan (Hourand-East Azarbaijan)
  Alireza Ravankhah Mohsen Moayyed Mehadi Moradi Amir Morteza Azimzadeh Jamshid Hasanzadeh Nasir Amel
  The gabbroic bodies are outcropped in the East and south-west of Hourand (East of Kaleybar) and in the East Azarbaijan province. The gabbroic body of Leghlan forms frequent sills injected in the Upper Cretaceous-Paleocene flysch deposits. The gabbroic body of Hashtsar More

  The gabbroic bodies are outcropped in the East and south-west of Hourand (East of Kaleybar) and in the East Azarbaijan province. The gabbroic body of Leghlan forms frequent sills injected in the Upper Cretaceous-Paleocene flysch deposits. The gabbroic body of Hashtsar along with associated pyroxenite were injected into these deposits. The mineral composition of the gabbroic body of Leghlan is plagioclase, clinopyroxene, potassium feldspar and biotite, and the major minerals of the gabbroic body of Hashtsar includes plagioclase, clinopyroxene and amphibole. Plagioclases in gabbroic body of Hashtsar (anorthite) is more calcic than those in the gabbroic body of Leghlan and show no chemical zoning. The composition of clinopyroxene in both bodies is in the range of diopside and amphiboles in gabbroic body of Hashtsar are pargasite to tschermakite. The parental magmas of these bodies, based on mineral chemistry and composition of clinopyroxene, was shoshonit and the melting occurred at a rate of about 5% of the enriched spinel-garnet lherzolite mantle and with garnet in the residue. The rocks were developed in a volcanic arc setting. Manuscript profile
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  5 - Geology, geochemistry and genesis of the iron mineralization in Jurassic volcano-sedimentary sequence of the Dash Aghol deposit, Northeast of Bukan, Sanandaj-Sirjan zone
  Sajad Maghfouri Mahdi Movahadnia Mehadi Moradi
  20.1001.1.17357128.1398.13.50.6.0
  The Dash Aghol iron deposit is located in the northeast of Bukan city and is hosted by Jurassic volcano-sedimentary sequence. The main host rock of the Dash Aghol deposit includes sandstone, limy tuff and limestone. Based on geometry of ore body, two different types of More

  The Dash Aghol iron deposit is located in the northeast of Bukan city and is hosted by Jurassic volcano-sedimentary sequence. The main host rock of the Dash Aghol deposit includes sandstone, limy tuff and limestone. Based on geometry of ore body, two different types of mineralization were distinguished in Dash Aghol deposit: lenticular primary mineralization which occurred as parallel and concordant with layering of the host rocks. Ore textures of this type include massive, laminated and disseminated forms existing in sandstone, limy tuff and limestone. Second type, includes supergene vein-veinlet and open space filling mineralization which is associated with faults and related brecciated zones and were occurred in hanging wall rocks of the primary ore lense. According to the stratigraphy, ore body form, texture, paragenetic sequences, ore bearing chert-carbonate- tuff facies and mineralogy, the iron mieralization in Dash Aghol deposit is stratiform tuff carbonate-sandstone host rocks deposits, in rolcano-sedimentary sequence of Jurassic, which were precipitated in shallow marine environment. Manuscript profile