MINERALOGY, GEOCHEMISTRY AND MASS CHANGES DUE TO ALTERATION OF KHOSH YEYLAGH VOLCANIC ROCKS, EAST OF GOLESTAN PROVINCE

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BABAZADEH SH.; MAZAHERI S.A.; RAGHIMI M.; RAHIMI CHAKDEL A.

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2014 | Volume:21 | Issue:4 Page(s): 607-624

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Title

MINERALOGY, GEOCHEMISTRY AND MASS CHANGES DUE TO ALTERATION OF KHOSH YEYLAGH VOLCANIC ROCKS, EAST OF GOLESTAN PROVINCE

Author(s)

BABAZADEH SH. | MAZAHERI S.A. | RAGHIMI M. | RAHIMI CHAKDEL A. | Issue Writer Certificate

Keywords

KHOSHYEYLAGHQ3

VOLCANIC ROCKSQ2

PROPYLITIC ALTERATIONQ2

PISTASITEQ2

ISOCON DIAGRAMQ2

CHEMICAL INDEX OF ALTERATION (CIA)Q2

Abstract

The VOLCANIC ROCKS of Silurian in Khosh yeylagh are located in eastern Alborz structural zone, east of Golestan Province. This volcanic mass is significantly affected by hydrothermal alteration. PROPYLITIC ALTERATION is the most dominant alteration in this area. Based on field observation and X-Ray diffraction studies, four alteration zones of chlorite, epidote, albite and hematite are recognized in the study area. The results of XPMA show that chlorites present in rocks of this area as peninite, talc- chlorite and diabanite. These minerals are formed in temperature ranging from 180 to 250 oC. The average of PISTASITE amount in epidotes is 31.15 which show that this mineral is magmatic type and is composed of saussuritized plagioclase.Isocon diagrams show the high mobility of some immobile elements during alteration. In albite, alteration zone with an average isocon slope of 1.06 and 1.09 is the highest while in chlorite, alteration zone with an average isocon slope of 1 and 1.03 is the lowest mass transfer which can be observed during alteration. Also based on these diagrams, SiO2 and P2O5 show depletion and L.O.I and Fe2O3 enrichment in all alteration zones. Chemical index of alteration (CIA) indicate that on epidote alteration zone 46.26% to 46.30%, albite alteration zone 47.86% to 51.49%, chlorite alteration zone 46.50% to 47.33% and hematite alteration zone 59.7% to 71.45% have gone under alteration.

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APA: Copy

BABAZADEH, SH., MAZAHERI, S.A., RAGHIMI, M., & RAHIMI CHAKDEL, A.. (2014). MINERALOGY, GEOCHEMISTRY AND MASS CHANGES DUE TO ALTERATION OF KHOSH YEYLAGH VOLCANIC ROCKS, EAST OF GOLESTAN PROVINCE. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 21(4), 607-624. SID. https://sid.ir/paper/4117/en

Vancouver: Copy

BABAZADEH SH., MAZAHERI S.A., RAGHIMI M., RAHIMI CHAKDEL A.. MINERALOGY, GEOCHEMISTRY AND MASS CHANGES DUE TO ALTERATION OF KHOSH YEYLAGH VOLCANIC ROCKS, EAST OF GOLESTAN PROVINCE. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2014;21(4):607-624. Available from: https://sid.ir/paper/4117/en

IEEE: Copy

SH. BABAZADEH, S.A. MAZAHERI, M. RAGHIMI, and A. RAHIMI CHAKDEL, “MINERALOGY, GEOCHEMISTRY AND MASS CHANGES DUE TO ALTERATION OF KHOSH YEYLAGH VOLCANIC ROCKS, EAST OF GOLESTAN PROVINCE,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 21, no. 4, pp. 607–624, 2014, [Online]. Available: https://sid.ir/paper/4117/en

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