Light Fe isotopes in arc magmas from cold subduction zones: Implications for serpentinite-derived fluids oxidized the sub-arc mantle

• Published in: Geochimica et cosmochimica acta Vol. 342; pp. 1 - 14
• Main Authors: Chen, Zuxing, Chen, Jiubin, Tamehe, Landry Soh, Zhang, Yuxiang, Zeng, Zhigang, Zhang, Ting, Shuai, Wangcai, Yin, Xuebo
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2023
• Subjects: Arc magmas; Cold subduction zones; Fe isotopes; Oxygen fugacity; Serpentinite dehydration; Oxygen fugacity; Arc magmas; Cold subduction zones; Serpentinite dehydration; Fe isotopes

Arc basalts typically have higher Fe3+/ΣFe ratios but lighter Fe isotopic compositions than mid-ocean ridge basalts (MORB); however, the reasons for these differences are unclear. Here, we report new Fe isotope data for fresh lavas from the Mariana subduction zone, along with available Fe-B-Sr-Nd is...