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Latitude-dependent oxygen fugacity in arc magmas

Author

Listed:
  • Fangyang Hu

    (Chinese Academy of Sciences)

  • Hehe Jiang

    (Chinese Academy of Sciences)

  • Bo Wan

    (Chinese Academy of Sciences)

  • Mihai N. Ducea

    (University of Bucharest
    University of Arizona)

  • Lei Gao

    (China University of Geosciences)

  • Fu-Yuan Wu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

The redox state of arc mantle has been considered to be more oxidized and diverse than that of the mid-ocean ridge, but the cause of the variation is debated. We examine the redox state of the Cenozoic global arc mantle by compiling measured/calculated fO2 of olivine-hosted melt inclusions from arc magma and modeled fO2 based on V/Sc and Cu/Zr ratios of arc basaltic rocks. The results indicate that the redox state of Cenozoic arc mantle is latitude dependent, with less oxidized arc mantle in the low latitudes, contrasting with a near constant across-latitude trend in the mid-ocean ridges. We propose that such a latitude-dependent pattern in the arc mantle may be controlled by the variation in the redox state of subducted sediment, possibly related to a latitudinal variation in the primary production of phytoplankton, which results in more organic carbon and sulfide deposited on the low-latitude ocean floor. Our findings provide evidence for the impact of the surface environment on Earth’s upper mantle.

Suggested Citation

  • Fangyang Hu & Hehe Jiang & Bo Wan & Mihai N. Ducea & Lei Gao & Fu-Yuan Wu, 2024. "Latitude-dependent oxygen fugacity in arc magmas," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50337-6
    DOI: 10.1038/s41467-024-50337-6
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    References listed on IDEAS

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    1. Alberto E. Saal & Erik H. Hauri & Charles H. Langmuir & Michael R. Perfit, 2002. "Vapour undersaturation in primitive mid-ocean-ridge basalt and the volatile content of Earth's upper mantle," Nature, Nature, vol. 419(6906), pages 451-455, October.
    2. Kai Deng & Shouye Yang & Yulong Guo, 2022. "A global temperature control of silicate weathering intensity," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    3. Cin-Ty A. Lee & Peter Luffi & Véronique Le Roux & Rajdeep Dasgupta & Francis Albaréde & William P. Leeman, 2010. "The redox state of arc mantle using Zn/Fe systematics," Nature, Nature, vol. 468(7324), pages 681-685, December.
    4. S. Tumiati & S. Recchia & L. Remusat & C. Tiraboschi & D. A. Sverjensky & C. E. Manning & A. Vitale Brovarone & A. Boutier & D. Spanu & S. Poli, 2022. "Subducted organic matter buffered by marine carbonate rules the carbon isotopic signature of arc emissions," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    5. Lei Gao & Shuwen Liu & Peter A. Cawood & Fangyang Hu & Jintuan Wang & Guozheng Sun & Yalu Hu, 2022. "Oxidation of Archean upper mantle caused by crustal recycling," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
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