MINERALOGICAL, GEOCHEMICAL AND GENETICAL INVESTIGATIONS OF THE JAJARM KARST BAUXITE DEPOSIT, NE IRAN

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AMINI L.; SHAMANIAN GH.H.; RAGHIMI M.; JAFARZADEH R.

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2011 | Volume:19 | Issue:3 Page(s): 413-426

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Title

MINERALOGICAL, GEOCHEMICAL AND GENETICAL INVESTIGATIONS OF THE JAJARM KARST BAUXITE DEPOSIT, NE IRAN

Author(s)

AMINI L. | SHAMANIAN GH.H. | RAGHIMI M. | JAFARZADEH R. | Issue Writer Certificate

Keywords

KARST BAUXITEQ2

DIASPORAQ3

BAUXITIZATIONQ2

ALLOCHTHONOUSQ2

AUTOCHTONOUSQ2

JAJARMQ2

Abstract

The JAJARM bauxite deposit is a part of the Irano-Hymalayan KARST BAUXITE belt which is located about 175 km southwest of Bojnourd. This deposit has been developed as a stratiform horizon along the contact of Triassic dolomites and the Jurassic shales and sandstones. The basal contact zone of the bauxite horizon is mainly undulatory, and bauxite fills cavities in the footwall dolomite, whereas the upper contact zone is concordant with the hanging-wall shales and sandstones. Textural analysis indicates both ALLOCHTHONOUS and AUTOCHTONOUS origins for the bauxites. Diaspore, bohemite, gibbsite, chamosite, hematite, goethite, clay minerals, anatase, cancrinite, crandallite, pyrite, and quartz were identified in the ore paragenesis. These minerals are developed during three stages of weathering, diagenetic and epigenetic processes. Combination of mineralogical and geochemical data show that this deposit formed during two main stages. First, bauxite materials, Fe and Ti oxides and clay minerals were developed as authigenic BAUXITIZATION processes of alkaline basaltic parent rock. During the second stage, these materials were transported to karst depressions, where they accumulated as a relatively thick bauxite horizon.

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APA: Copy

AMINI, L., SHAMANIAN, GH.H., RAGHIMI, M., & JAFARZADEH, R.. (2011). MINERALOGICAL, GEOCHEMICAL AND GENETICAL INVESTIGATIONS OF THE JAJARM KARST BAUXITE DEPOSIT, NE IRAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 19(3), 413-426. SID. https://sid.ir/paper/4009/en

Vancouver: Copy

AMINI L., SHAMANIAN GH.H., RAGHIMI M., JAFARZADEH R.. MINERALOGICAL, GEOCHEMICAL AND GENETICAL INVESTIGATIONS OF THE JAJARM KARST BAUXITE DEPOSIT, NE IRAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2011;19(3):413-426. Available from: https://sid.ir/paper/4009/en

IEEE: Copy

L. AMINI, GH.H. SHAMANIAN, M. RAGHIMI, and R. JAFARZADEH, “MINERALOGICAL, GEOCHEMICAL AND GENETICAL INVESTIGATIONS OF THE JAJARM KARST BAUXITE DEPOSIT, NE IRAN,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 19, no. 3, pp. 413–426, 2011, [Online]. Available: https://sid.ir/paper/4009/en

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