MINERALOGY AND GENESIS OF BARITE MINERALIZATION IN SHANJAN, NORTH OF SHABESTAR, NW IRAN

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ZOLFI LEILA; SIMMONDS VARTAN

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Journal: GEOCHEMISTRY Year:2015 | Volume:4 | Issue:1 Page(s): 1-14

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Information Journal Paper

Title

MINERALOGY AND GENESIS OF BARITE MINERALIZATION IN SHANJAN, NORTH OF SHABESTAR, NW IRAN

Author(s)

ZOLFI LEILA | SIMMONDS VARTAN | Issue Writer Certificate

Keywords

BARITEQ2

SHANJANQ2

VEIN-TYPE MINERALIZATIONQ2

FLUID INCLUSIONQ2

STABLE ISOTOPEQ2

Abstract

Shanjan BARITE ore is located on the southern slopes of Mishow mountains in Shabestar. Mineralization here is found as several disrupted lenticular veins, hosted by shale and schist rocks of Kahar Formation. The ore mineral is crystalline, with an average BaO grade of about 54.73%. The size of euhedral and semi-euhedral and tabular BARITE crystals reaches up to 2 cm. The main BARITE veins are about 1m thick, while the thickness of other veins in higher elevations, ranges between 10 and 20 cm. These are cross-cut by thin medium- to fine-grained quartz veinlets. Furthermore, there are disseminations and veinlets of sulfide minerals cross-cutting BARITE veins, which are mainly composed of chalcopyrite with lesser amounts of pyrite and galena. FLUID INCLUSIONs within the BARITE veins are mainly 2-phase with degree of fillings higher than 80%, which indicates the low temperature of the ore-bearing fluids. Sulfur isotope composition of BARITE and chalcopyrite (37.81-39.11 and 21.46-22.52 ‰, respectively) shows that sulfur was most likely originated from basinal waters confined within the shale units of Kahar Formation, which also contain framboidal pyrite and organic materials, as the d34S of BARITE is very close to the isotopic composition of Late-Precambrian sea-water sulfates. Meanwhile, analyses carried out on the rhyolitic rocks and shale units of Kahar Formation indicate high Ba content of these rocks, so these rocks may have acted as the possible source of BARITE ore.

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APA: Copy

ZOLFI, LEILA, & SIMMONDS, VARTAN. (2015). MINERALOGY AND GENESIS OF BARITE MINERALIZATION IN SHANJAN, NORTH OF SHABESTAR, NW IRAN. GEOCHEMISTRY, 4(1), 1-14. SID. https://sid.ir/paper/230913/en

Vancouver: Copy

ZOLFI LEILA, SIMMONDS VARTAN. MINERALOGY AND GENESIS OF BARITE MINERALIZATION IN SHANJAN, NORTH OF SHABESTAR, NW IRAN. GEOCHEMISTRY[Internet]. 2015;4(1):1-14. Available from: https://sid.ir/paper/230913/en

IEEE: Copy

LEILA ZOLFI, and VARTAN SIMMONDS, “MINERALOGY AND GENESIS OF BARITE MINERALIZATION IN SHANJAN, NORTH OF SHABESTAR, NW IRAN,” GEOCHEMISTRY, vol. 4, no. 1, pp. 1–14, 2015, [Online]. Available: https://sid.ir/paper/230913/en

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