THE EMARAT AND MUCHAN SEDIMENTARY ROCK-HOSTED STRATA BOUND ZN-PB DEPOSITS: NEW DATA AND GENETIC IMPLICATIONS

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FAZLI S.; SHAMANIAN GH.H.; SHAFIEI B.

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Journal Paper

Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2012 | Volume:20 | Issue:1 Page(s): 67-80

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Title

THE EMARAT AND MUCHAN SEDIMENTARY ROCK-HOSTED STRATA BOUND ZN-PB DEPOSITS: NEW DATA AND GENETIC IMPLICATIONS

Author(s)

FAZLI S. | SHAMANIAN GH.H. | SHAFIEI B. | Issue Writer Certificate

Keywords

ZINC-LEADQ3

SILICIFICATIONQ2

SULFUR ISOTOPEQ1

MALAYER-ESFAHANQ2

EMARATQ3

MUCHANQ2

Abstract

The EMARAT and MUCHAN ZINC-LEAD ore deposits are located in southwest of Arak within the middle part of the MALAYER-ESFAHAN belt. These deposits have formed as stratabound within carbonate strata of Lower Cretaceous. Mineralization in these deposits is mainly open space filling, which consists of sphalerite, galena, pyrite and minor quantities of chalcopyrite associated with host rock SILICIFICATION. The most abundant sulfide mineral is sphalerite, which occurs in two generations. Galena as an accessory mineral has been formed during and after formation of sphalerite. Based on textural evidence, SILICIFICATION occurs in two separate stages. First, microcrystalline quartz replaces nearly all the original carbonate host rock. During the second stage, the vugs and fissures of the silicifed host rock were filled with macrocrystalline quartz associated with mineralization. The sulfur isotopic data indicated the d34S values of sulfide minerals varies from +4.8 to +11.8 per mil. Based on these results, the Lower Cretaceous seawater acted most likely as the source of sulfide mineralization. The isotopic temperatures from two sphalerite-galena pairs at EMARAT deposit varied from 121.1oC in stage I to 112.8oC in stage II, which are lower than the isotopic temperature of the MUCHAN deposit (134.3oC). Combination of geological, mineralogical and SULFUR ISOTOPE results suggest that connate water, metals and silica have been derived from diagenesis of Jurassic shales and sandstones. Furthermore, thermochemical sulfate reduction, interaction of the ore fluids with the host rock, and cooling were proposed to be the main ore depositional mechanisms.

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References

RECOGNITION OF ORIGINAL CARBONATE MINERALOGY AND DETERMINATION OF ORE GENESIS IN ROBAT MINE (KHOMEIN-ARAK) CARBONATES

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APA: Copy

FAZLI, S., SHAMANIAN, GH.H., & SHAFIEI, B.. (2012). THE EMARAT AND MUCHAN SEDIMENTARY ROCK-HOSTED STRATA BOUND ZN-PB DEPOSITS: NEW DATA AND GENETIC IMPLICATIONS. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 20(1), 67-80. SID. https://sid.ir/paper/4287/en

Vancouver: Copy

FAZLI S., SHAMANIAN GH.H., SHAFIEI B.. THE EMARAT AND MUCHAN SEDIMENTARY ROCK-HOSTED STRATA BOUND ZN-PB DEPOSITS: NEW DATA AND GENETIC IMPLICATIONS. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2012;20(1):67-80. Available from: https://sid.ir/paper/4287/en

IEEE: Copy

S. FAZLI, GH.H. SHAMANIAN, and B. SHAFIEI, “THE EMARAT AND MUCHAN SEDIMENTARY ROCK-HOSTED STRATA BOUND ZN-PB DEPOSITS: NEW DATA AND GENETIC IMPLICATIONS,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 20, no. 1, pp. 67–80, 2012, [Online]. Available: https://sid.ir/paper/4287/en

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