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  • Identification of Fe3+ content in Epidote from Varan, Urumieh-Dokhtar magmatic arc, Iran: using FTIR and Raman spectroscopy

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Manuscript ID : IJES-2006-1493 (R2) Visit : 211 Page: 131 - 139

10.30495/ijes.2021.685387

Article Type: Original Research

Identification of Fe3+ content in Epidote from Varan, Urumieh-Dokhtar magmatic arc, Iran: using FTIR and Raman spectroscopy

Subject Areas : Mineralogy

Bahman Rahimzadeh 1 , Zheira Ghosoun 2 , Fariborz Masoudi 3

1 - School of Earth Sciences, Shahid Beheshti University, Tehran, Iran
2 - School of Earth Sciences, Shahid Beheshti University, Tehran, Iran
3 - School of Earth Sciences, Shahid Beheshti University, Tehran, Iran

Received: 2021-03-01 Accepted : 2021-07-05 Published : 2021-07-05

Keywords: Iran, Epidote, Urumieh-Dokhtar Magmatic Arc, Raman spectroscopy, FTIR,

Abstract :

This study is aimed to determine the Fe content in natural epidote from Varan area (Urumieh-Dokhtar Magmatic Arc, Iran) by using vibrational FTIR and Raman spectroscopy and EPMA analyses. Fe3+ concentration calculated from FTIR spectroscopic data is in the range of 0.96 to 1 apfu. The results are in complete agreement with EPMA data. The comparison between obtained Raman spectra of studied epidote grains and those from the RRUFF database suggest that epidote from Varan area is rich in Fe3+. High Fe3+ content might reflect moderate to high oxygen fugacity during the crystallization of epidote. This short paper demonstrates that the quantification of the Fe content in epidote via FTIR method is as good as EPMA, whereas the utilization of a low-cost Raman spectrometer helps in quickly distinguishing between Fe-rich and Fe-poor epidote, which even could be useful in the case of field studies.Key-words: Epidote, FTIR, Raman spectroscopy, Iron content, Urumieh-Dokhtar Magmatic Arc, Iran.

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