Reply to comment by Compagnoni et al. on 'First finding of continental deep subduction in the Sesia Zone of Western Alps and implications for subduction dynamics'
2024

Response to Comments on Coesite Findings in the Sesia Zone

publication Evidence: moderate

Author Information

Author(s): Chen Yi-Xiang, Zhou Kun, He Qiang, Zheng Yong-Fei, Schertl Hans-Peter, Chen Kun

Primary Institution: State Key Laboratory of Lithospheric and Environmental Co-evolution, University of Science and Technology of China

Hypothesis

The occurrence of coesite in supracrustal rocks indicates continental deep subduction.

Conclusion

The study provides compelling evidence for the presence of coesite in the Sesia zone, addressing critiques regarding its identification.

Supporting Evidence

  • The presence of coesite in supracrustal rocks suggests significant geological processes.
  • Raman spectroscopy provided clear evidence against contamination concerns raised by critics.
  • Observations indicate that coesite can occur at the margins of quartz, challenging previous assumptions.

Takeaway

Scientists found a special mineral called coesite in rocks that were pushed deep into the Earth, which helps us understand how continents can sink.

Methodology

The study involved Raman spectroscopy to analyze mineral compositions in metamorphic rocks.

Limitations

Further studies are needed to explore the unusual occurrence of coesite and its implications.

Digital Object Identifier (DOI)

10.1093/nsr/nwae457

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