The Shamsabad Fe-Mn deposit, Markazi province, Iran: LA-ICP-MS and sulfur isotopic geochemistry

Ehya, Farhad; Marbouti, Zohreh

doi:10.1016/j.oregeorev.2021.104555

Cited by 6 publications

(5 citation statements)

References 60 publications

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“…Both the Emarat deposit and the Shams-Abad deposit are hosted by the same uppermost part of the massive limestone immediately below shale unit ("Klsd") that hosts the Eastern Haft-Savaran deposit. The Emarat deposit has been classified as an MVT deposit (Ehya et al, 2010), whereas the Shams-Abad deposit has been classified as synsedimentary seafloor hydrothermal (Ehya & Marbouti, 2021). Classification of these two deposits with similar stratigraphic positions as different deposit types do not seem logical, and we believe that these two deposits are misclassified.…”

Section: Mineralization Characteristics and Timingmentioning

confidence: 92%

“…However, others favor a synsedimentary to syndiagenetic origin (Yarmohammadi et al, 2016;Boveiri Konari et al, 2017;Boveiri Konari & Rastad, 2018;Maanijou et al, 2020). The Emarat Zn-Pb deposit in the northwestern part of the Arak Mining District was classified as an MVT deposit by Ehya et al (2010) based on S and Pb isotopic data for hydrothermal sulphide minerals, whereas the Shams-Abad Fe-Mn-(Pb) deposit in the central part of the Arak Mining District was classified as a synsedimentary seafloor hydrothermal deposit (Ehya & Marbouti, 2021). Based on geological and textural characteristics, the Robat Zn-Pb-Ba deposit was classified as an Irish-type deposit by Niroomand et al (2019).…”

Section: Introductionmentioning

confidence: 99%

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Geological and textural characteristics as evidence for Irish-type mineralization in the Eastern Haft-Savaran deposit

Mahmoodi,

Peter,

Rajabi

et al. 2023

Irish-Type Zn-Pb Deposits Around the World

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The Eastern Haft-Savaran Zn-Pb-(Ba) deposit, located in the southeastern part of the Arak Mining District of the Malayer-Esfahan Metallogenic Belt, Iran, is hosted in the uppermost part of an early Cretaceous massive limestone unit that is capped by shale. The mineralization has a sheet-like geometry and is associated with intense dolomitization and silicification. The mineralization is mineralogically zoned: chalcopyrite-galena-pyrite-sphalerite-tetrahedrite occurs in the southern part of the deposit; sphalerite-galena-pyrite occurs in the central part of the deposit; and barite-galena-sphalerite-pyrite occurs in the northern part of the deposit. The thickest mineralization and most intense alteration are in the southern part of the deposit, associated with an aphyric rhyodacite flow containing minute euhedral barite crystals and Cu-bearing sulphides in vein/veinlets and disseminations, indicating this was the mineralizing fluid upflow site. Three hydrothermal mineralization stages are recognized. The first is mud lime sedimentation, framboidal pyrite, minute euhedral barite, sphalerite, galena and early dolomite. Minute euhedral barites are cut by microsparite formed by micrite recrystallization during diagenesis. First stage sphalerite and galena occur as inclusions in framboidal pyrite, and these were remobilized into inclusions in euhedral pyrite during recrystallization. The second (main) stage mineralization includes sphalerite, galena, chalcopyrite, tetrahedrite, pyrite and barite that with dolomite and quartz as gangue minerals replaced first stage mineralization and is associated with silicification and dolomitization. The third stage of mineralization comprises sphalerite and galena that is associated with dolomitization and calcitization. The occurrence of mineralization in an extensional back arc setting, massive limestone host rock, intense and pervasive host rock alteration, Fe-dolomite associated with main stage mineralization, the presence of mineralization load casts and minute euhedral barite, the remobilization of first stage of mineralization during diagenetic evolution of framboidal pyrite to euhedral pyrite, and timing of mineralization during early diagenesis of mud lime collectively indicate the Eastern Haft-Savaran deposit can be classified as an Irish-type deposit.

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Section: Mineralization Characteristics and Timingmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Geological and textural characteristics as evidence for Irish-type mineralization in the Eastern Haft-Savaran deposit

Mahmoodi,

Peter,

Rajabi

et al. 2023

Irish-Type Zn-Pb Deposits Around the World

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“…The dis tri bu tion of REY in the sulphides of the Bou-Izourane and Tigrinine-Taabast dis tricts is char acter ized by sig nif i cant neg a tive Y and Ce anom a lies. There fore, the low ΣREE val ues and neg a tive Ce anom a lies are con sid -ered typ i cal of a de posit strongly re lated to hy dro ther mal flu ids (Jach and Dudek, 2005;Josso et al, 2017;Ehya and Marbouti, 2021), and the pres ence of sulphates in creases the sol u bil ity of Y (Guan et al, 2022).…”

Section: Geochemical Constraintsmentioning

confidence: 99%

Geological features of the Zn-Pb prospect in the Bou-Izourane district (Morocco)

Achmani,

Chraibi,

Courba

et al. 2024

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The Zn-Pb mineralization in the Bou-Izourane district, located in the High Atlas Mountains of Morocco, contains estimated reserves of 40 200 tons of ore with an average grade of 20% Zn and 3.5% Pb. It is developed on N–S to NNW–SSE-trending faults that cut Liassic carbonate marl deposits. The paragenetic mineral sequence consists of galena, sphalerite and late-stage calcite. Oxidation phases of galena into cerussite and sphalerite into smithsonite are common in the Bou-Izourane ore, linked to the infiltration of meteoric waters and the oxidation of these sulphides. The Zn-Pb mineralization runs parallel to the fluorite veins associated with the igneous rocks of Tamazeght, but no petrographic or field relationship has been demonstrated between these two mineralizations (i.e., Zn-Pb and fluorite). The distribution of rare earth elements and yttrium (REY) in the Zn-Pb mineralization of Bou-Izourane shows a notable similarity with the Mississippi Valley Type (MVT) mineralization of the Central High Atlas of Morocco, although the concentrations more closely resemble those of REY in fluorite linked to the magmatic-hydrothermal activity of Tamazeght. However, the analysis of their distribution in post-fluorite calcite and post-Zn-Pb calcite reveals a strong concordance, suggesting that these two calcites are associated with the same phase and have a common origin. The classification of the Zn-Pb prospect in Bou-Izourane remains controversial, fluctuating between an MVT-type mineralization, similar to most Zn-Pb mineralizations in the Central High Atlas of Morocco, and a mineralization linked to the magmatic-hydrothermal activity of Tamazeght, which could provide heat and metallogenic material. Characterizing the Zn-Pb ore of Bou-Izourane is crucial for the future exploration of zinc and lead deposits in the High Atlas of Morocco and could advance the development of Zn-Pb mining in the region, from artisanal exploitation to professional mining

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“…These ore deposits are hosted in early Cretaceous sandstone, tuffaceous siltstone, dolomitized and silicified limestone and sandstone, and they are associated with minor volcanic rocks (Fig. 10; Akbari, 2017;Akbari et al, 2020;Peernajmodin, 2018;Rajabi et al, 2019a;Maanijou et al, 2020;Han et al, 2020;Ehya & Marbouti, 2021). In these deposits, Fe-bearing carbonates (siderite and ankerite) are the most important hydrothermal minerals that are associated with barite, chalcopyrite, pyrite, galena, pyrolusite, todorokite, coronadite, rhodochrosite (Peernajmoin, 2018;Akbari et al, 2020).…”

Section: Sideritic Irish-type Fe-mn-pb-zn (±Ag±ba±cu) Depositsmentioning

confidence: 99%

An introduction to Irish-type Zn-Pb deposits in early Cretaceous carbonate rocks of Iran

Rajabi,

Mahmoodi,

Rastad

et al. 2023

Irish-Type Zn-Pb Deposits Around the World

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Early Cretaceous carbonates are the most common host rocks for Irish-type deposits in Iran. They are largely concentrated in the Malayer-Esfahan metallogenic belt (MEMB) in southwestern Iran, and Yazd-Anarak metallogenic belt in Central Iran. They include some world‐class ore deposits such as Mehdiabad, Irankuh, and Ahangaran. These stratabound deposits are hosted mostly in carbonates with minor siltstones and volcanic components, that formed in extensional and passive margin environments that are related to the Nain-Baft back-arc basin. The deposits are stratabound and comprise wedge-shaped to tabular sulphide-barite orebodies and occur in several different stratigraphic horizons. Dolomitization and silicification are the main wall-rock alteration styles. Replacement textures are common, and orebodies represent complex textures of sulphides and barite, such as brecciated, colloform, zebra, minor laminated, and banded replacement. Barite is an important gangue mineral in the MEMB and YAMB deposits, partly replaced by coarse-grained galena, sphalerite, and chalcopyrite. Sulphides from these Irish-type deposits have a wide spread of light δ34S values (with the majority falling between -25 to +5‰) with mostly bacterial sulphate reduction (BSR) origin. Fluid inclusion studies show that homogenization temperatures of ore minerals are typically 120 to about 280°C (majority 225-275°C), and salinities range from 2 to 24 wt.% NaCl eq, with the majority falling between 8 and 22 wt% NaCl eq. Using the criteria outlined in this study, early Cretaceous extensional sedimentary basins (e.g., Nain-Baft) are highlighted as target areas for exploration of world-class Irish-type ore deposits and correspond well with the periods of expulsions of Cretaceous CaCl2-rich brines.

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The Shamsabad Fe-Mn deposit, Markazi province, Iran: LA-ICP-MS and sulfur isotopic geochemistry

Cited by 6 publications

References 60 publications

Geological and textural characteristics as evidence for Irish-type mineralization in the Eastern Haft-Savaran deposit

Geological and textural characteristics as evidence for Irish-type mineralization in the Eastern Haft-Savaran deposit

Geological features of the Zn-Pb prospect in the Bou-Izourane district (Morocco)

An introduction to Irish-type Zn-Pb deposits in early Cretaceous carbonate rocks of Iran

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