Infrared and Isotopic Evidence for Diagenesis of Bone Apatite at Dos Pilas, Guatemala: Palaeodietary Implications

Wright, Lori E.; Schwarcz, Henry P.

doi:10.1006/jasc.1996.0087

Cited by 313 publications

(281 citation statements)

References 38 publications

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“…The sum of the absorbance values of the two phosphate peaks at wavenumbers 565 (ν4 PO 4 ) and 603 cm −1 (ν4 PO 4 ) was then divided by the height of the valley between them to obtain the IRSF value, following the protocol described by Weiner and Bar-Yosef (1990). Relative carbonate content was measured by the peak heights at wavenumbers 1035 (ν3 PO 4 ) and 1415 cm − 1 (ν3 CO 3 ) (Wright and Schwarcz, 1996). Relative collagen content was measured by the intensity ratio of the amide I peak at 1640 cm − 1 versus the phosphate peak at 1030 cm −1 (Trueman et al, 2008).…”

Section: Samplingmentioning

confidence: 99%

“…Such processes that affect bone preservation can be caused by microbial attack, temperature, humidity, hydrology, pH, and may lead to partial or complete degradation of organic matter (Beasley et al, 2014;Lebon et al, 2010). Diagenesis is also associated with uptake or exchange of ions (Wright and Schwarcz, 1996) and changes in the crystallinity of bone mineral (Berna et al, 2004). During recrystallization, bone mineral can incorporate or adsorb dissolved ionic species from groundwater into its crystal structure, but it is not inevitable that the original isotope composition is altered (Hollund et al, 2013;Lee-Thorp, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Stable isotope and multi-analytical investigation of Monte da Cegonha: A Late Antiquity population in southern Portugal

Saragoça

Maurer

Šoberl

et al. 2016

Journal of Archaeological Science: Reports

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This study presents for the first time the diet of a Late Antiquity population in southern Portugal (Civitas of Pax Julia), from the Roman villa of Monte da Cegonha (predominantly 7th century CE). Stable isotope analysis (δ 13 C, δ 15 N, δ 18 O, 87 Sr/ 86 Sr) of human and faunal bone collagen and apatite was conducted in order to understand the influence of Roman subsistence strategies on the way of life of rural inhabitants of the area of Pax Julia and to explore their diet (types of ingested plants, amount of animal resources, terrestrial versus marine resources). X-ray diffraction (XRD) and Fourier transform infra-red spectroscopy (FTIR) analyses were used to determine the degree of bone diagenesis and assess the reliability of the bone stable isotopic composition for palaeodietary reconstruction. Anthropological analysis revealed a cariogenic diet, rich in starchy food and carbohydrates, in at least in two individuals based on the frequency of dental caries. Collagen and apatite carbon isotopic analysis suggested that C 3 plants were the basis of the population's diet, complemented with some terrestrial meat and its byproducts as reflected by the observed bone collagen nitrogen isotopic composition. Moreover, whilst the fairly low apatite-collagen spacing recorded in some skeletons (at around 4‰) may have been due to freshwater organisms intake, the relatively low nitrogen values observed indicate that this consumption did not occur very often, unless in the form of fresh fish of low trophic level or fish sauces. There were no significant differences in isotopic values depending on gender or burial type. Strontium and oxygen isotopic composition of bone apatite revealed a sedentary community, with the exception of a male individual who probably did not spend his childhood in Monte da Cegonha.

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Section: Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stable isotope and multi-analytical investigation of Monte da Cegonha: A Late Antiquity population in southern Portugal

Saragoça

Maurer

Šoberl

et al. 2016

Journal of Archaeological Science: Reports

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“…On the basis of the spectra, two indicators were applied to assess diagenetic alteration of the samples -the Crystallinity Index: (Lebon et al, 2010;Wright and Schwarcz, 1996).…”

Section: Methodsmentioning

confidence: 99%

The human bone oxygen isotope ratio changes with aging

2014

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Abstract:The oxygen isotope ratio (δ 18 O) in tissues is the outcome of both climatic and geographical factors in a given individual's place of abode, as well as the physiology and metabolism of his organism. During an individual's life, various rates and intensities of physiological and metabolic processes are observable in the organism, also within the bone tissue. The aim of this study is to verify whether involutional changes occurring as a result of the organism's ageing have a significant impact on δ 18 O determined in the bone tissue. The material used for analysis was fragments of the long bones taken from 65 people, (11 children and 54 adults), whose remains had been uncovered at the early mediaeval (X-XI century) cemetery located at the Main Market Square in Kraków (Poland). The correlation analysis between δ18 O of bone tissue and an individual's age shows that up to 40 years of age, such a relationship does not exist in both, males and females. However, the conducted correlation analysis prompted the observation that after 40 years of life, δ 18 O in bone tissue significantly drops as females increase in age. Results suggest that the δ 18 O in bone tissue among older people may be the outcome not only of environmental factors but also involutional changes in bone linked to an organism's ageing. Therefore, the interpretation of δ 18 O results relating to the description of the origin and migrations of older individuals should be treated with caution.

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“…To secure information in the 400e600 cm À1 region additional 8 mm diameter KBr pellets were prepared and analysed in the macro chamber of the main bench Nicolet Protégé 460 FT-IR. After a baseline correction the crystallinity of reported apatite spectra was estimated using CL ¼ (A 565 þ A 605 )/A 595, where A x is the absorbance at wavenumber x (Termine and Posner, 1996;Shemesh, 1990;Wright and Schwarc, 1996). Carbonate content of measured apatites was calculated using the ratio of the CO 3 (1415 cm À1 ) and PO 4 (1035 cm À1 ) peaks in the sample spectrum and established correlations of CO 3 /PO 4 absorbance to weight %CO 3 for human skeletons, with a best fit line of C/P ¼ 0.025 þ 0.039(%CO 3 ) (Wright and Schwarc, 1996).…”

Section: Fourier Transform Infrared Microscopymentioning

confidence: 99%

“…In this study CO 3 bands at 1456, 1413 and 873 cm À1 suggest that the carbonate ion typically replaces the phosphate ion. The carbonate content for the hyroxyapatite was estimated from the ratio of the absorbances of CO 3 at 1413 cm À1 and PO 4 at w1052 cm À1 (Wright and Schwarc, 1996). These data show carbonate content varies between 1.2 and 11 wt% CO 3 .…”

Section: Ft-irmentioning

confidence: 99%

Characterization and textural analysis of Middle Bronze Age Transdanubian inlaid wares of the Encrusted Pottery Culture, Hungary: a preliminary study

Roberts

Sofaer

Kiss

2008

Journal of Archaeological Science

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Inlaid ceramics belonging to the Encrusted Pottery Culture and dated to the Middle Bronze Age (2000e1500 BC) are highly distinctive vessels with complex decorative motifs found in large numbers in the Transdanubia region of Hungary. Despite this considerable corpus of material there has been little systematic investigation of the composition of the inlays. Micro-analysis of Transdanubian inlaid wares by X-ray diffraction (XRD), micro-Fourier transform infrared microscopy (FT-IR), and scanning electron microscopy (SEM) provides new compositional, structural and textural information on the inlays. In contrast to common statements in the literature regarding the materials used to make inlays, these new data show that the majority of inlays are composed of hydroxyapatite (bone) that was previously ashed, although some of the inlays are composed of calcium carbonate. Additional compositional and textural variation in the bone inlays suggests that bone material from different skeletal elements and/or of different age may have been used, and that contrasting recipes for inlay preparation were employed during fabrication. These results suggest that the production of inlaid vessels of the Encrusted Pottery Culture was more complex than has hitherto been thought.

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Infrared and Isotopic Evidence for Diagenesis of Bone Apatite at Dos Pilas, Guatemala: Palaeodietary Implications

Cited by 313 publications

References 38 publications

Stable isotope and multi-analytical investigation of Monte da Cegonha: A Late Antiquity population in southern Portugal

Stable isotope and multi-analytical investigation of Monte da Cegonha: A Late Antiquity population in southern Portugal

The human bone oxygen isotope ratio changes with aging

Characterization and textural analysis of Middle Bronze Age Transdanubian inlaid wares of the Encrusted Pottery Culture, Hungary: a preliminary study

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