The interpretability of stable hydrogen isotopes in modern herbivore tooth enamel

Drewicz, Amanda E.; Trayler, Robin B.; Holloway, Mariah E.; Harrigan, Claire O.; Kohn, Matthew J.

doi:10.1016/j.gca.2019.11.013

Cited by 2 publications

(6 citation statements)

References 54 publications

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“…2008, Drewicz et al . 2020), as shark collagen has so far not been analysed yet. This relationship was expressed as ∆ collagen–phosphate , and an isotopic 18 O depletion of ‐5‰ of the δ 18 O collagen relative to the δ 18 O PO4 is assumed.…”

Section: Resultsmentioning

confidence: 99%

“…The low δ 18 O value measured for the modern shark tooth using SIMS may, in part, be related to the presence of organic matter (e.g., Drewicz et al . 2020). While there are no collagen δ 18 O values reported for sharks in the literature, the collagen δ 18 O values of herbivore mammals are about 5‰ lower compared with that for enamel δ 18 O PO4 values (Kirsanow et al .…”

Section: Discussionmentioning

confidence: 99%

“…Relative to carbonates, the phosphate values are likely to be 7 to 9‰ (Δ carbonate-phosphate between +7 to +9‰; Iacumin et al 1996, Vennemann et al 2001, L ecuyer et al 2010, Aguilera et al 2017. Compared with organic matter (i.e., collagen), a Δ collagen-phosphate value of -5‰ is used (Kirsanow et al 2008, Drewicz et al 2020.…”

Section: Oxygen Isotope Compositions Of Tissues Analysedmentioning

confidence: 99%

“…The low d 18 O value measured for the modern shark tooth using SIMS may, in part, be related to the presence of organic matter (e.g., Drewicz et al 2020). While there are no collagen d 18 O values reported for sharks in the literature, the collagen d 18 O values of herbivore mammals are about 5‰ lower compared with that for enamel d 18 O PO4 values (Kirsanow et al 2008, Drewicz et al 2020. Assuming the same degree of isotopic 18 O depletion (i.e., Δ collagen-phosphate ) for shark tooth collagen, and assuming that the complete unmeasurable portion represents collagen only, such a contribution would decrease the d 18 O values by only 1.5‰ (Table 4).…”

Section: Oxygen Isotope Compositions Of Tissues Analysedmentioning

confidence: 99%

“…To the carbonate group, an 18 O enrichment of carbonate compared with phosphate of between +7 to +9‰ (Δ carbonate-phosphate ; Iacumin et al 1996, Vennemann et al 2001, L ecuyer et al 2010, Aguilera et al 2017) is hypothesised. For organic matter, the estimates are based on collagen d 18 O values measured from herbivorous mammals (Kirsanow et al 2008, Drewicz et al 2020, as shark collagen has…”

Section: Secondary Ion Mass Spectrometry (Sims)mentioning

confidence: 99%

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New Insights on Micro‐Scale Variations of Geochemical and Oxygen Isotope Compositions in Conodont and Shark Tooth Bioapatite

Luz,

Leu,

Baumgartner

et al. 2023

Geostandard Geoanalytic Res

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To help understand bioapatite microstructures and related chemical variations, their impact on O‐isotope compositions measured and give insights on sample preparation, this study analysed conodonts and shark teeth prepared in different orientations through microanalytical and bulk sampling techniques: scanning electron microscopy (SEM); electron probe microanalysis (EPMA); continuous‐flow and high‐temperature reduction – isotope ratio mass spectrometry; and secondary ion mass spectrometry (SIMS). The SEM and EPMA measurements in conodonts allowed to distinguish the tissues commonly analysed by SIMS, which included albid and hyaline crowns but given their often small‐scale intergrowth, mixtures of these are difficult to avoid. In situ SIMS O‐isotope analyses provided different δ18O values: lower values with higher variance (16 ± 1‰ n = 13, 15.7 ± 1.9‰ n = 11) for mixed albid‐hyaline tissues, and higher, homogeneous values (17.1 ± 0.2‰, n = 13) for mainly hyaline tissues. Recent shark teeth δ18OSIMS value for dentine of the same tooth was 10‰ lower than the mean δ18OSIMS value for enameloid whereas the δ18OPO4 values measured for enameloid and dentine using the HTR method were identical. The variation of δ18O seems sensitive to analytical artefacts related to sample textures, caused during the sample preparation over more porous biomineral surfaces.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%