GEOLOGICAL, MINERALOGICAL, ALTERATION FEATURES AND RARE EARTH ELEMENTS (REES) GEOCHEMISTRY OF NEYZAR IRON DEPOSIT, SOUTHWEST MASHHAD, NORTHEAST IRAN

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NAJAFZADEH TEHRANI P.; CALAGARI A.A.; ABEDINI A.; MAZLUMI A.

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2013 | Volume:21 | Issue:2 Page(s): 229-242

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Title

GEOLOGICAL, MINERALOGICAL, ALTERATION FEATURES AND RARE EARTH ELEMENTS (REES) GEOCHEMISTRY OF NEYZAR IRON DEPOSIT, SOUTHWEST MASHHAD, NORTHEAST IRAN

Author(s)

NAJAFZADEH TEHRANI P. | CALAGARI A.A. | ABEDINI A. | MAZLUMI A. | Issue Writer Certificate

Keywords

NEYZARQ2

MASHHADQ2

IRON ORESQ2

RARE EARTH ELEMENTSQ1

HEMATITEQ2

GOETHITEQ2

Abstract

NEYZAR iron deposit is located about 50 km southwest MASHHAD, northeast Iran. It was developed as layered and discontinuous lenses in a fault zone within quartz-arenite and sublitharenite sandstones of Lalun Formation (Lower Cambrian). Mineralographical studies show that HEMATITE is the principal iron ore mineral accompanied by GOETHITE and lesser amounts of pyrite. Microscopic examinations confirm the presence of skeletal, relic replacement, marginal replacement, and pseudomorphic textures within the ores. Based on petrographical data, two series of alteration minerals, hypogene (sericite, pyrite, pyrophyllite, barite, chalcedony, and calcite) and supergene (goethite, jarosite, gypsum, limonite, and HEMATITE) were developed in this deposit. Based on the results obtained from field works, mineralographical and geochemical studies, it appears that the evolution of the studied ores is genetically related to the host rocks.Both hydrothermal processes and fault systems (existing in the host rocks) played important roles in leaching of elements and depositing of the ores. Results of chemical analyses show that the REE values vary in the IRON ORES from 6.97 to 18.26 ppm. Eu and Ce anomalies in the ores are within the ranges of 0.01-1.36 and 0.28-1.89, respectively. Geochemical considerations reveal that distribution of RARE EARTH ELEMENTS within NEYZAR IRON ORES was controlled by pH, abundance of complex-forming ions (CO32-, F-, Cl-, PO43-, and SO42-), scavenging processes, and fixation in neomorph mineral phases.

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APA: Copy

NAJAFZADEH TEHRANI, P., CALAGARI, A.A., ABEDINI, A., & MAZLUMI, A.. (2013). GEOLOGICAL, MINERALOGICAL, ALTERATION FEATURES AND RARE EARTH ELEMENTS (REES) GEOCHEMISTRY OF NEYZAR IRON DEPOSIT, SOUTHWEST MASHHAD, NORTHEAST IRAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 21(2), 229-242. SID. https://sid.ir/paper/3852/en

Vancouver: Copy

NAJAFZADEH TEHRANI P., CALAGARI A.A., ABEDINI A., MAZLUMI A.. GEOLOGICAL, MINERALOGICAL, ALTERATION FEATURES AND RARE EARTH ELEMENTS (REES) GEOCHEMISTRY OF NEYZAR IRON DEPOSIT, SOUTHWEST MASHHAD, NORTHEAST IRAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2013;21(2):229-242. Available from: https://sid.ir/paper/3852/en

IEEE: Copy

P. NAJAFZADEH TEHRANI, A.A. CALAGARI, A. ABEDINI, and A. MAZLUMI, “GEOLOGICAL, MINERALOGICAL, ALTERATION FEATURES AND RARE EARTH ELEMENTS (REES) GEOCHEMISTRY OF NEYZAR IRON DEPOSIT, SOUTHWEST MASHHAD, NORTHEAST IRAN,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 21, no. 2, pp. 229–242, 2013, [Online]. Available: https://sid.ir/paper/3852/en

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