MINERALOGICAL INVESTIGATION OF HYDROTHERMAL ALTERATIONS IN THE MIDDLE PART OF TAROM MOUNTAINS – NORTHWEST OF IRAN

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GANJI A.R.

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2005 | Volume:13 | Issue:1 Page(s): 121-133

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Title

MINERALOGICAL INVESTIGATION OF HYDROTHERMAL ALTERATIONS IN THE MIDDLE PART OF TAROM MOUNTAINS – NORTHWEST OF IRAN

Author(s)

GANJI A.R. | Issue Writer Certificate

Keywords

HYDROTHERMAL ALTERATIONQ2

APS MINERALSQ4

IILLITE CRYSTALLINITY (IC)Q4

TAROM MOUNTAINSQ4

Abstract

The studied area is a part of TAROM MOUNTAINS and is located in 40 km north of Zanjan. The area is formed mainly by Tertiary volcano-sedimentary and plutonic rocks, which are mostly altered. Based upon geological setting, the HYDROTHERMAL ALTERATIONs in the area are divided into two groups: (1) Regional alterations consisting of potassic, sericitic and propylitic types. (2) Structurally controlled alterations consisting of three argillic & alunitic types. The mineralogical studies show that, the major minerals characterizing the argillic – alunitic alterations are APS MINERALS (especially alunite and jarosite) + clay minerals (kaolinite, montmorillonite, illite, mixed–layer illite/smectite) + chlorite + sericite + quartz + gypsum + pyrite, that their quantity, grain size and crystallinity vary in the different alteration types. In order to determine the temperature of argillization, the illite crystallinity factor is used and the results of calculations showed that the formation temperature of illites is about 200 to 240 oC. The results of this study indicate that the argillic-alunitic alterations of studied area considerably resemble high-sulfidation type of the epithermal argillic alterations in the continental arc subduction zones.

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APA: Copy

GANJI, A.R.. (2005). MINERALOGICAL INVESTIGATION OF HYDROTHERMAL ALTERATIONS IN THE MIDDLE PART OF TAROM MOUNTAINS – NORTHWEST OF IRAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 13(1), 121-133. SID. https://sid.ir/paper/3788/en

Vancouver: Copy

GANJI A.R.. MINERALOGICAL INVESTIGATION OF HYDROTHERMAL ALTERATIONS IN THE MIDDLE PART OF TAROM MOUNTAINS – NORTHWEST OF IRAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2005;13(1):121-133. Available from: https://sid.ir/paper/3788/en

IEEE: Copy

A.R. GANJI, “MINERALOGICAL INVESTIGATION OF HYDROTHERMAL ALTERATIONS IN THE MIDDLE PART OF TAROM MOUNTAINS – NORTHWEST OF IRAN,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 13, no. 1, pp. 121–133, 2005, [Online]. Available: https://sid.ir/paper/3788/en

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