Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth
Isotopic signatures used in the georeferencing of human remains are largely fixed by spatially distinct geologic and environmental processes. However, location-dependent temporal changes in these isotope ratios should also be considered when determining an individual’s provenance and/or trajectory....
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Oxford University Press
2021-01-01
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| Series: | Forensic Sciences Research |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/20961790.2020.1795377 |
| _version_ | 1827848756822802432 |
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| author | Laura A. Regan Nathan W. Bower Samuel J. Brown Craig C. Lundstrom Gideon Bartov Matthew D. Cooney |
| author_facet | Laura A. Regan Nathan W. Bower Samuel J. Brown Craig C. Lundstrom Gideon Bartov Matthew D. Cooney |
| author_sort | Laura A. Regan |
| collection | DOAJ |
| description | Isotopic signatures used in the georeferencing of human remains are largely fixed by spatially distinct geologic and environmental processes. However, location-dependent temporal changes in these isotope ratios should also be considered when determining an individual’s provenance and/or trajectory. Distributions of the relevant isotopes can be impacted by predictable external factors such as climate change, delocalisation of food and water sources and changes in sources and uses of metals. Using Multi-Collector Inductively-Coupled Plasma Mass Spectrometer (MC-ICP-MS) analyses of 206Pb/207Pb in tooth enamel and dentin from a population of 21 ± 1-year-old individuals born circa 1984 and isotope ratio mass spectrometry (IRMS) of δ18O in their enamel, we examined the expected influence of some of these factors. The resulting adjustments to the geographic distribution of isotope ratios (isoscapes) found in tooth enamel and dentin may contain additional useful information for forensic identification, but the shifts in values can also impact the uncertainty and usefulness of identifications if they are not taken into account.KEY POINTS Isoscapes of 206Pb/207Pb and δ18O used for geolocation are not static. Within a few years, the enamel and dentin of a person may exhibit measurable differences in 206Pb/207Pb even without changing locations. Changes in climatic patterns tied to rising temperatures are more significant than the direct effect of increasing temperature on δ18O fixed in tooth bioapatite. Third molar (M3) enamel mineralisation includes material incorporated from before formal amelogenesis takes place. |
| first_indexed | 2024-03-12T09:52:29Z |
| format | Article |
| id | doaj.art-b043cf25c84b4bfc9d7d0e32d297a8ce |
| institution | Directory Open Access Journal |
| issn | 2096-1790 2471-1411 |
| language | English |
| last_indexed | 2024-03-12T09:52:29Z |
| publishDate | 2021-01-01 |
| publisher | Oxford University Press |
| record_format | Article |
| series | Forensic Sciences Research |
| spelling | doaj.art-b043cf25c84b4bfc9d7d0e32d297a8ce2023-09-02T12:26:48ZengOxford University PressForensic Sciences Research2096-17902471-14112021-01-0161425210.1080/20961790.2020.17953771795377Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teethLaura A. Regan0Nathan W. Bower1Samuel J. Brown2Craig C. Lundstrom3Gideon Bartov4Matthew D. Cooney5Office of Net Assessment, Department of DefenseChemistry and Biochemistry Department, Colorado CollegeChemistry and Biochemistry Department, Colorado CollegeGeology Department, University of IllinoisGeology Department, University of IllinoisInformation Technology Services, Colorado CollegeIsotopic signatures used in the georeferencing of human remains are largely fixed by spatially distinct geologic and environmental processes. However, location-dependent temporal changes in these isotope ratios should also be considered when determining an individual’s provenance and/or trajectory. Distributions of the relevant isotopes can be impacted by predictable external factors such as climate change, delocalisation of food and water sources and changes in sources and uses of metals. Using Multi-Collector Inductively-Coupled Plasma Mass Spectrometer (MC-ICP-MS) analyses of 206Pb/207Pb in tooth enamel and dentin from a population of 21 ± 1-year-old individuals born circa 1984 and isotope ratio mass spectrometry (IRMS) of δ18O in their enamel, we examined the expected influence of some of these factors. The resulting adjustments to the geographic distribution of isotope ratios (isoscapes) found in tooth enamel and dentin may contain additional useful information for forensic identification, but the shifts in values can also impact the uncertainty and usefulness of identifications if they are not taken into account.KEY POINTS Isoscapes of 206Pb/207Pb and δ18O used for geolocation are not static. Within a few years, the enamel and dentin of a person may exhibit measurable differences in 206Pb/207Pb even without changing locations. Changes in climatic patterns tied to rising temperatures are more significant than the direct effect of increasing temperature on δ18O fixed in tooth bioapatite. Third molar (M3) enamel mineralisation includes material incorporated from before formal amelogenesis takes place.http://dx.doi.org/10.1080/20961790.2020.1795377forensic sciencesdentinenamelenvironmentalgeolocationisoscaperadiogenic and stable isotopes |
| spellingShingle | Laura A. Regan Nathan W. Bower Samuel J. Brown Craig C. Lundstrom Gideon Bartov Matthew D. Cooney Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth Forensic Sciences Research forensic sciences dentin enamel environmental geolocation isoscape radiogenic and stable isotopes |
| title | Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth |
| title_full | Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth |
| title_fullStr | Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth |
| title_full_unstemmed | Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth |
| title_short | Forensic isoscapes based on intra-individual temporal variation of δ18O and 206Pb/207Pb in human teeth |
| title_sort | forensic isoscapes based on intra individual temporal variation of δ18o and 206pb 207pb in human teeth |
| topic | forensic sciences dentin enamel environmental geolocation isoscape radiogenic and stable isotopes |
| url | http://dx.doi.org/10.1080/20961790.2020.1795377 |
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