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An intermittent detachment faulting system with a large sulfide deposit revealed by multi-scale magnetic surveys

Author

Listed:
  • Tao Wu

    (MNR, Second Institute of Oceanography, MNR)

  • Maurice A. Tivey

    (Woods Hole Oceanographic Institution)

  • Chunhui Tao

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

  • Jinhui Zhang

    (MNR, Second Institute of Oceanography, MNR)

  • Fei Zhou

    (Institute de Physique du Globe, CNRS UMR)

  • Yunlong Liu

    (MNR, Second Institute of Oceanography, MNR)

Abstract

Magmatic and tectonic processes can contribute to discontinuous crustal accretion and play an important role in hydrothermal circulation at ultraslow-spreading ridges, however, it is difficult to accurately describe the processes without an age framework to constrain crustal evolution. Here we report on a multi-scale magnetic survey that provides constraints on the fine-scale evolution of a detachment faulting system that hosts hydrothermal activity at 49.7°E on the Southwest Indian Ridge. Reconstruction of the multi-stage detachment faulting history shows a previous episode of detachment faulting took place 0.76~1.48 My BP, while the present fault has been active for the past ~0.33 My and is just in the prime of life. This fault sustains hydrothermal circulation that has the potential for developing a large sulfide deposit. High resolution multiscale magnetics allows us to constrain the relative balance between periods of detachment faulting and magmatism to better describe accretionary processes on an ultraslow spreading ridge.

Suggested Citation

  • Tao Wu & Maurice A. Tivey & Chunhui Tao & Jinhui Zhang & Fei Zhou & Yunlong Liu, 2021. "An intermittent detachment faulting system with a large sulfide deposit revealed by multi-scale magnetic surveys," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25880-1
    DOI: 10.1038/s41467-021-25880-1
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