Assessing and calibrating the ATR-FTIR approach as a carbonate rock characterization tool

Henry, Delano G.; Watson, Jonathan S.; John, Cédric M.

doi:10.1016/j.sedgeo.2016.07.003

Cited by 53 publications

(31 citation statements)

References 22 publications

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“…Opus software was used to evaluate the data. The identification of dolomite is based on the blueshift of D1 peak position (1400 cm À1 ) and diagnostic D3 (728 cm À1 ) peak following the research of Henry et al (2017). The silicates (mainly quartz and feldspar) are characterized by the intense absorbance bands of Si-O stretch at ca 1000 cm À1 .…”

Section: Micromentioning

confidence: 99%

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

Wen

Sánchez‐Román

et al. 2020

Sedimentology

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In past decades, the formation of dolomite at low temperature has been widely studied in both natural systems and cultured experiments, yet the mechanism(s) involved in the nucleation and precipitation of dolomite remains unresolved. Late Eocene dolomitic deposits from core in the upper Niubao Formation (Lunpola Basin, central Tibetan Plateau, China) are selected as a case study to understand the dolomitization process(es) in the geological record. Dolomite formation in Lunpola Basin can be ascribed to a different mechanism forming the large quantities of replacive dolostones in the geological record; and provides a potential fossil analogue for primary dolomite precipitation at low temperature. This analogue consists of an alternation of laminated dolomitic beds, organic‐rich and siliciclastic layers; formed in response to intense evaporation interpreted to take place in a continental shallow lake environment. Mineralogical, textural and stable isotopic evaluations suggest that the dolomite from those dense‐clotted laminated beds is a primary precipitate. At the nanoscale, these dolomitic beds are composed of Ca–Mg carbonate globular nanocrystals (diameter 80 to 100 nm) embedded in an organic matrix and attached to clay flakes. Micro‐infrared spectroscopy analyses have revealed the presence of aliphatic compounds in the organic matrix. Microscopic and elemental compositional studies suggest that clay surfaces may facilitate the nucleation of dolomite at low temperature in the same way as the organic matrix does. The dolomite laminae show values for δ18OVPDB from −3.2 to −1.76‰ and for δ13CVPDB from −2.62 to −3.78‰. Inferred δ18OSMOW values of the lake water reveal typical evaporitic hydrological conditions. These findings provide a potential link to primary dolomite formation in ancient and modern sedimentary environments; and shed new light on the palaeoenvironmental conditions in central Tibet during the Eocene.

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Section: Micromentioning

confidence: 99%

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

Wen

Sánchez‐Román

et al. 2020

Sedimentology

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“…Spectral analyses were performed with the OPUS software provided by the instrument manufacturer (BrukerOptics Sarl). The assignment of the different absorption bands was obtained by comparison with previous spectra descriptions available in the bibliography (Henry et al, 2017). Each double-button was sampled in ‘bulk’ but the nacreous and prismatic layers of samples HavC and PesB were also analysed separately, in order to determine the mineralogical composition of each microstructural layer.…”

Section: 1 Archaeological Sites and Double-buttonsmentioning

confidence: 99%

'Palaeoshellomics’ reveals the use of freshwater mother-of-pearl in prehistory

Sakalauskaite

Andersen

Biagi

et al. 2019

eLife

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The extensive use of mollusc shell as a versatile raw material is testament to its importance in prehistoric times. The consistent choice of certain species for different purposes, including the making of ornaments, is a direct representation of how humans viewed and exploited their environment. The necessary taxonomic information, however, is often impossible to obtain from objects that are small, heavily worked or degraded. Here we propose a novel biogeochemical approach to track the biological origin of prehistoric mollusc shell. We conducted an in-depth study of archaeological ornaments using microstructural, geochemical and biomolecular analyses, including ‘palaeoshellomics’, the first application of palaeoproteomics to mollusc shells (and indeed to any invertebrate calcified tissue). We reveal the consistent use of locally-sourced freshwater mother-of-pearl for the standardized manufacture of ‘double-buttons’. This craft is found throughout Europe between 4200–3800 BCE, highlighting the ornament-makers’ profound knowledge of the biogeosphere and the existence of cross-cultural traditions.

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“…According to the scientific data, the characteristic FTIR signals for CaCO 3 are at ~1400 cm −1 (ν3—doubly degenerate planar asymmetric stretching), ~870 cm −1 (ν2—out-of-plane bending), and between 700 and 746 cm −1 (ν4—doubly degenerate planar bending). The absorption band 1100−1000 cm −1 can also be detected (ν1—symmetric stretching) but is less noticeable and does not have to be taken into consideration [ 48 ].…”

Section: Resultsmentioning

confidence: 99%

Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

et al. 2021

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Microbiologically induced CaCO3 precipitation (MICP) is a well-known bio-based solution with application in environmental, geotechnical, and civil engineering. The significance of the MICP has increased explorations of process efficiency and specificity via natural bacterial isolates. In this study, comprehensive profiling of five soil ureolytic Bacillus strains was performed through a newly formed procedure that involved six steps from selection and identification, through kinetic study, to the characterization of the obtained precipitates, for the first time. To shorten the whole selection procedure of 43 bioagents with the MICP potential, Standard Score Analysis was performed and five selected bacteria were identified as Bacillus muralis, B. lentus, B. simplex, B. firmus, and B. licheniformis by the MALDI-TOF mass spectrometry. Despite following the targeted activity, kinetic studies were included important aspects of ureolysis and the MICP such as cell concentration, pH profiling, and reduction in calcium ion concentration. At the final step, characterization of the obtained precipitates was performed using FTIR, XRD, Raman, DTA/TGA, and SEM analysis. Although all tested strains showed significant potential in terms of precipitation of calcite or calcite and vaterite phase, the main differences in the MICP behavior can be observed at the bacterial strain level. B. licheniformis showed favorable behavior compared to the reference Sporosarcina pasteurii DSM 33.

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Assessing and calibrating the ATR-FTIR approach as a carbonate rock characterization tool

Cited by 53 publications

References 22 publications

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

'Palaeoshellomics’ reveals the use of freshwater mother-of-pearl in prehistory

Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

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