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Deep high-temperature hydrothermal circulation in a detachment faulting system on the ultra-slow spreading ridge

Author

Listed:
  • Chunhui Tao

    (Second Institute of Oceanography, MNR
    Shanghai Jiao Tong University)

  • W. E. Seyfried

    (University of Minnesota)

  • R. P. Lowell

    (Virginia Polytechnic and State University)

  • Yunlong Liu

    (Second Institute of Oceanography, MNR
    Jilin University)

  • Jin Liang

    (Second Institute of Oceanography, MNR)

  • Zhikui Guo

    (Second Institute of Oceanography, MNR
    China University of Geosciences)

  • Kang Ding

    (Chinese Academy of Sciences)

  • Huatian Zhang

    (Peking University)

  • Jia Liu

    (Second Institute of Oceanography, MNR)

  • Lei Qiu

    (Second Institute of Oceanography, MNR)

  • Igor Egorov

    (Academician I.S. Gramberg All-Russia Scientific Research Institute for Geology and Mineral Resources of the Ocean)

  • Shili Liao

    (Second Institute of Oceanography, MNR)

  • Minghui Zhao

    (Chinese Academy of Sciences)

  • Jianping Zhou

    (Second Institute of Oceanography, MNR)

  • Xianming Deng

    (Second Institute of Oceanography, MNR)

  • Huaiming Li

    (Second Institute of Oceanography, MNR)

  • Hanchuang Wang

    (Second Institute of Oceanography, MNR)

  • Wei Cai

    (Second Institute of Oceanography, MNR)

  • Guoyin Zhang

    (Second Institute of Oceanography, MNR)

  • Hongwei Zhou

    (Second Institute of Oceanography, MNR)

  • Jian Lin

    (Chinese Academy of Sciences
    Woods Hole Oceanographic Institution)

  • Wei Li

    (Second Institute of Oceanography, MNR)

Abstract

Coupled magmatic and tectonic activity plays an important role in high-temperature hydrothermal circulation at mid-ocean ridges. The circulation patterns for such systems have been elucidated by microearthquakes and geochemical data over a broad spectrum of spreading rates, but such data have not been generally available for ultra-slow spreading ridges. Here we report new geophysical and fluid geochemical data for high-temperature active hydrothermal venting at Dragon Horn area (49.7°E) on the Southwest Indian Ridge. Twin detachment faults penetrating to the depth of 13 ± 2 km below the seafloor were identified based on the microearthquakes. The geochemical composition of the hydrothermal fluids suggests a long reaction path involving both mafic and ultramafic lithologies. Combined with numerical simulations, our results demonstrate that these hydrothermal fluids could circulate ~ 6 km deeper than the Moho boundary and to much greater depths than those at Trans-Atlantic Geotraverse and Logachev-1 hydrothermal fields on the Mid-Atlantic Ridge.

Suggested Citation

  • Chunhui Tao & W. E. Seyfried & R. P. Lowell & Yunlong Liu & Jin Liang & Zhikui Guo & Kang Ding & Huatian Zhang & Jia Liu & Lei Qiu & Igor Egorov & Shili Liao & Minghui Zhao & Jianping Zhou & Xianming , 2020. "Deep high-temperature hydrothermal circulation in a detachment faulting system on the ultra-slow spreading ridge," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15062-w
    DOI: 10.1038/s41467-020-15062-w
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    Cited by:

    1. Ivan Koulakov & Vera Schlindwein & Mingqi Liu & Taras Gerya & Andrey Jakovlev & Aleksey Ivanov, 2022. "Low-degree mantle melting controls the deep seismicity and explosive volcanism of the Gakkel Ridge," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Jie Chen & Wayne C. Crawford & Mathilde Cannat, 2023. "Microseismicity and lithosphere thickness at a nearly-amagmatic oceanic detachment fault system," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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