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Evidence of Impact at the Permian/Triassic Boundary from Mössbauer Spectroscopy

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Abstract

Sediment samples from Spiti valley, India, deposited about 250 Million years ago during the Permian-Triassic transition, have been analysed. 57Fe Mössbauer spectroscopic studies show that iron occurs mainly as nanoparticles of hematite and goethite with a broad size distribution. The results show a high degree of resemblance with the Cretaceous-Tertiary boundary (65 My) samples where an asteroidal impact is believed to have caused mass extinction.

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Technology, Kanpur, 208016, India

    H. C. Verma & C. Upadhyay

  2. Department of Physics, Jai Narain Vyas University, Jodhpur, 342001, India

    R. P. Tripathi

  3. Physical Research Laboratory, Navrangpura, Ahmedabad, 380009, India

    A. D. Shukla & N. Bhandari

Authors
  1. H. C. Verma
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  2. C. Upadhyay
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  3. R. P. Tripathi
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  4. A. D. Shukla
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  5. N. Bhandari
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Verma, H.C., Upadhyay, C., Tripathi, R.P. et al. Evidence of Impact at the Permian/Triassic Boundary from Mössbauer Spectroscopy. Hyperfine Interactions 141, 357–360 (2002). https://doi.org/10.1023/A:1021232220892

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  • DOI: https://doi.org/10.1023/A:1021232220892

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