Granite- and gabbrodiorite-associated skarn deposits of NW Iran

Somarin, Alireza Karimzadeh; Moayyed, Mohsen

doi:10.1016/s0169-1368(02)00068-9

Cited by 39 publications

(13 citation statements)

References 5 publications

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“…Urmieh-Dokhtar magmatic belt in Tertiary caused several ore deposits in Iran especially copper deposits such as Porphyry and Skarn deposits [27][28][29][30][31][32][33][34][35][36][37]. The other recognized copper deposit types in Iran are volcanic massive sulfide (VMS) and Hydrothermal vein type deposits.…”

Section: Regional Geologymentioning

confidence: 99%

Qualitative Contours: A New Geochemical Method for Preliminary Mineral Exploration

Agharezaei¹,

Hajari²,

Hezarkhani³

2018

IJSEA

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The target in this paper is introduction and application of a new exploration method to locate and highlight mineral deposits and mineralization trends. Generally exploration methods could be categorized into two major groups; quantitative and qualitative methods. Although many attempts have been taken to progress the first group, the second one has not been considered and improved as it should have been. This research offers a new method named 'Qualitative Contours' which is descriptive rather than being numeric. This new method is applied to delineate mineralization trends and deposits locations in Qaleh-Zari area. The selected study area is located north west of Qaleh-Zari copper deposit. This area is selected to determine how effective this method is to find mineralization trends and the known Qaleh-Zari deposit. Theis new method "Qualitative Contours" successfully located Qaleh-Zari deposit and mineralization trends in the area. Beside the main function of this method, other beneficial performances are discussed such as lithology modeling and erosion levels estimation which are highly correlated to field observations in the area. In this research, locating the well-known Qaleh-Zari copper deposit as the result of the Qualitative Contours method is discussed and in order to prove the accuracy of such locating, Concentration-Volume (C-V) Fractal modeling is used to prove copper anomalies numerically.

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Section: Regional Geologymentioning

confidence: 99%

Qualitative Contours: A New Geochemical Method for Preliminary Mineral Exploration

Agharezaei¹,

Hajari²,

Hezarkhani³

2018

IJSEA

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“…Many of the plutons of the AA belt are associated with porphyry and skarn mineralization (Hezarkhani & Williams-Jones, 1998;Karimzadeh Somarin & Moayyed, 2002). Petrographic and geochemical studies have shown that plutonic bodies vary in composition from diorite, quartz-monzodiorite, and quartz-monzonite to quartz-syenite (Amini et al, 2001;Sahandi, 2006).…”

Section: Regional Geologymentioning

confidence: 99%

Genesis of Tertiary Magnetite–Apatite Deposits, Southeast of Zanjan, Iran

2009

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Magnetite-apatite deposits in the Alborz volcano-plutonic belt, southeast Zanjan, in Iran, have blade, lenzoid, and vein forms, which extend in an E-W direction. There are many magnetite-apatite veins and veinlets in this region, and some of them are economically important, such as Zaker, Morvarid, Sorkheh-Dizaj, and Aliabad. The sizes of the vein orebodies vary between 2 and 16 m in width, 10-100 m in length, and 5-40 m in depth. Microscopic examination of thin sections and polishes indicate that they are composed of magnetite and apatite, with minor amounts of goethite, hematite, actinolite, quartz, muscovite-illite, talc, dolomite, and calcite. The geochemistry and mineralogy of the granitic host rock reveals that it is calc-alkaline and I-type. Field observations, mineral paragenesis, the composition of the orebodies, and the composition of the fluid inclusions in the apatite minerals with low salinity (less than 20 wt.% NaCl equivalent) indicate that these magnetite veins were hydrothermally generated at about 200-430°C and are not related to silica-iron oxide immiscibility, as are the major Precambrian magnetite deposits in central Iran.

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“…The Ahar region is part of the Alborz-Azarbaijan geotectonic zone, which structurally and magmatically was one of the most active zones of Iran (Shahabpour 1999;Mohajjel and Fergusson 2000;Babaie et al 2001;Brunet and Cloetingh 2003;Karimzadeh Somarin 2005, 2006. There are several economic and subeconomic Cu-Fe ± Au ore deposits including skarn, porphyry and epithermal mineralization in Iran, Turkey, and Armenia (Karimzadeh Somarin and Moayyed 2002;Karimzadeh Somarin 2004a, 2004b. These deposits are part of the Alpine-Eurasian metallogenic belt that extends Fig.…”

Section: Regional Geologymentioning

confidence: 99%

“…At Sungun, *30 km NW of Mazraeh, an Oligocene-Miocene monzodioritic pluton intruded into the Eocene andesitic to rhyolitic country rocks and Cretaceous calcareous lithologies and formed economic porphyry and skarn type mineralization (Karimzadeh Somarin and Moayyed 2002). At Tikmeh Dash, *100 km south of Mazraeh, an Oligocene gabbrodioritic pluton intruded into Eocene calcitebearing altered volcanic and volcanoclastic rocks resulting in the formation of a subeconomic Fe-Mn skarn deposit (Karimzadeh Somarin and Moayyed 2002;Karimzadeh Somarin 2004b). Subeconomic epithermal mineralization resulted from the intrusion of the Mendejin granitic pluton, *150 km SE of Mazraeh, into the Eocene-Oligocene mafic to felsic volcanic rocks (Karimzadeh Somarin and Lentz 2008).…”

Section: Regional Geologymentioning

confidence: 99%

“…These processes take place in both plutonic rocks and country wall rocks forming endoskarn and exoskarn, respectively (e.g., Karimzadeh Somarin and Moayyed 2002;Meinert et al 2005). There is a paragenetic relationship between ore minerals and garnet skarns with ore minerals (such as sulfides) occurring as open space filling within the garnet skarn.…”

Section: Introductionmentioning

confidence: 99%

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Garnetization as a ground preparation process for copper mineralization: evidence from the Mazraeh skarn deposit, Iran

Somarin

2008

Int J Earth Sci (Geol Rundsch)

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The Mazraeh Cu-Fe skarn deposit, NW Iran is the result of the intrusion of an Oligocene-Miocene granitic pluton into Cretaceous calcareous rocks. The pluton ranges in composition from monzonite to quartz monzonite, monzogranite, tonalite and granodiorite with I-type, calcalkaline, and weakly peraluminous characteristics. The Mazraeh pluton was emplaced in a volcanic arc setting in an active continental margin at a depth of *8 km. Pyroxene skarn, garnet skarn, and epidote skarn zones were formed during the intrusive phase. The garnet skarn developed as exoskarn and endoskarn from the calcareous wall rocks and the pluton, respectively, prior to mineralization. Garnet skarn from the exoskarn zone is identified by relict layering inherited from the precursor calcareous lithologies. Mass balance calculation of garnet skarn in the endoskarn zone indicates that hydrothermal fluids originating from the cooling magma introduced Si,

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Granite- and gabbrodiorite-associated skarn deposits of NW Iran

Cited by 39 publications

References 5 publications

Qualitative Contours: A New Geochemical Method for Preliminary Mineral Exploration

Qualitative Contours: A New Geochemical Method for Preliminary Mineral Exploration

Genesis of Tertiary Magnetite–Apatite Deposits, Southeast of Zanjan, Iran

Garnetization as a ground preparation process for copper mineralization: evidence from the Mazraeh skarn deposit, Iran

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