AMPHIBOLE, CHLORITE AND ZOISITE AS RETROGRADE PHASES IN SHANDERMAN ECLOGITES

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OMRANI H.; MOAZEN MOHSEN; OBERHANSLI R.; BOUSQUET R.; TSUJIMORI S.

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Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2010 | Volume:18 | Issue:3 Page(s): 0-0

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Title

AMPHIBOLE, CHLORITE AND ZOISITE AS RETROGRADE PHASES IN SHANDERMAN ECLOGITES

Author(s)

Keywords

ALBORZ

SHANDERMAN

ECLOGITE

RETROGRADE METAMORPHISM

Abstract

All samples of SHANDERMAN ECLOGITEs contain amphibole, epidote group minerals and chlorite as retrograde phases. Amphiboles show zoning with high FeO and Al2O3 content at the rims and high MgO in the cores in some samples. In these samples, the amphibole compositions vary from tremolitic hornblende to tschermakite and edenitic hornblende from core to rim, respectively. Amphibole inclusions in zoisite have similar composition to matrix amphiboles and show tremolitic hornblende nature. Epidotes include both zoisite and clinozoisite existing in all samples. They show zoning and have high Al2O3 content in the core and high FeO content at the rims. Pistasite content in the core is 0.09% and at the rim is 0.17%. Plagioclase is enriched in Na and is almost pure albite endmember. Chlorites are MgO rich and are of Repidolite and Brunsvigite types. They show FeMg-1 and tschermakitic substitutions. Fe/Mg distribution coefficient among amphibole and chlorite for the cores of the minerals is around 0.5 and for the rims is 1. Thermobarometry of zoned amphiboles show that these minerals are grown from core to rim due to an increase in temperature and pressure.

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APA: Copy

OMRANI, H., MOAZEN, MOHSEN, OBERHANSLI, R., BOUSQUET, R., & TSUJIMORI, S.. (2010). AMPHIBOLE, CHLORITE AND ZOISITE AS RETROGRADE PHASES IN SHANDERMAN ECLOGITES. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 18(3), 0-0. SID. https://sid.ir/paper/556546/en

Vancouver: Copy

OMRANI H., MOAZEN MOHSEN, OBERHANSLI R., BOUSQUET R., TSUJIMORI S.. AMPHIBOLE, CHLORITE AND ZOISITE AS RETROGRADE PHASES IN SHANDERMAN ECLOGITES. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2010;18(3):0-0. Available from: https://sid.ir/paper/556546/en

IEEE: Copy

H. OMRANI, MOHSEN MOAZEN, R. OBERHANSLI, R. BOUSQUET, and S. TSUJIMORI, “AMPHIBOLE, CHLORITE AND ZOISITE AS RETROGRADE PHASES IN SHANDERMAN ECLOGITES,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 18, no. 3, pp. 0–0, 2010, [Online]. Available: https://sid.ir/paper/556546/en

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