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Related Experiment Videos

In- and out-flows of elements in bones embedded in reference soils.

T Shinomiya1, K Shinomiya, C Orimoto

  • 1Department of Legal Medicine, School of Medicine, Ehime University, Japan.

Forensic Science International
|February 26, 1999
PubMed
Summary

Human vertebrae buried for 2 years showed element exchange with soil. Some elements entered bone, others left, indicating soil type and burial time influence these changes for forensic analysis.

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Area of Science:

  • Forensic Anthropology
  • Geochemistry
  • Biogeochemistry

Background:

  • Understanding post-mortem elemental exchange between bone and soil is crucial for forensic science.
  • Previous studies have explored bone diagenesis, but detailed elemental analysis over time is limited.

Purpose of the Study:

  • To quantify elemental exchange between human bone and surrounding soil after 2 years of burial.
  • To categorize elemental migration patterns (in-flow, balanced decrease, out-flow).
  • To assess the influence of soil type and burial duration on these exchanges.

Main Methods:

  • Human vertebrae samples were buried underground for 2 years without pre-treatment.
  • Elemental composition of bone was analyzed using atomic emission mass spectrometry.

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  • Sixteen key elements were quantified and categorized based on their migration patterns.

    • Main Results:

    • Observed three types of elemental exchange: Type I (in-flow, e.g., Fe, Al, Ba), Type II (balanced decrease, e.g., S, Mg, Zn), and Type III (out-flow, e.g., Ca, P).
    • Elemental exchange dynamics were influenced by soil composition and burial duration.
    • Exchanges showed progression over the burial period.

    Conclusions:

    • Elemental exchange between buried bone and soil is a dynamic process influenced by environmental factors.
    • These findings provide a basis for estimating post-burial time and identifying soil-derived elements in forensic investigations.
    • The study highlights the potential for using elemental analysis of bone for forensic taphonomy.