In geochemistry, paleoclimatology, and paleoceanography δ13C (pronounced "delta c thirteen") is an isotopic signature, a measure of the ratio of the two...
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increases and δ13C values can be as low as −32‰. The δ13C value for animals depends on their diet. An animal that eats food with high δ13C values will have...
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An animal that eats food with high δ13C values will have a higher δ13C than one that eats food with lower δ13C values. The animal's own biochemical...
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signature of the SPICE event is a positive δ13C excursion, characterized by a 4 to 6 ‰ (per mille) shift in δ13C values within carbonate successions around...
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at any one time, δ18O and δ13C preserved in the fossil record can be affected by regional factors. Carboniferous δ18O and δ13C records show regional differences...
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photosynthetic pathway that produces δ13C values averaging about −12.5‰. It follows that eating these different plants will affect the δ13C values in the consumer's...
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87Sr/86Sr and δ13C. Continued erosion of the deeper levels of the Gondwanan mountain belts led to a peak in 87Sr/86Sr and linked positive δ13C and δ34S excursions...
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forms a substantial part of birds' eggshells, and the δ13C of the diet is reflected in the δ13C of the calcite of the shell. The largest documented single...
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expressed in using delta notation of δ13C ("delta thirteen C"), which is reported in parts per thousand (per mille, ‰). δ13C is defined in relation to the Vienna...
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of the earliest examples of biological control. The δ13C of the emu's diet is reflected in the δ13C of the calcite of its egg shell. Small stones are swallowed...
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clasts. Pentelic marble is divided into 3 units distinguishable by δ13C and δ18O values. δ13C and δ18O values have been used to precisely match marbles from...
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Douglas J.; Freeman, Katherine H. (September 5, 2018). "Fatty acid specific δ13C values reveal earliest Mediterranean cheese production 7,200 years ago"....
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between minerals can be used to estimate the temperature of equilibration. The δ13C and δ34S of coexisting carbonate minerals and sulfides can be used to determine...
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photosynthesis. The fraction is generally compared to a standard sample using a ratio δ13C expressed in parts per thousand. Common rocks from the mantle such as basalts...
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a duration of 60 ± 48 thousand years. A large, abrupt global decrease in δ13C, the ratio of the stable isotope carbon-13 to that of carbon-12, coincides...
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Rico): Chemical characterization and organic matter provenance using bulk δ13C, C/N, alkaline CuO oxidation-GC/MS, and solid-state". Geochemistry, Geophysics...
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Period/System (2250–2060 Ma) – names are respectively for the Lomagundi–Jatuli δ13C isotopic excursion event spanning its duration, and for the (proposed) first...
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period is marked by a prominent negative excursion in carbon stable isotope (δ13C) records from around the globe; more specifically, there was a large decrease...
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intensive chemical weathering in the Deccan basalts. Abrupt increase in δ13C values and decrease in TOC content accompanied with a significant increase...
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on 29 December 1898. Recent studies on the isotopic signature analysis of Δ13C and Nitrogen-15 in their bone collagen and hair keratin were published in...
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Stage (the base of the Ypresian) is defined at a strong negative anomaly in δ13C values at the global thermal maximum at the Paleocene-Eocene boundary. The...
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span formality Formal Lower boundary definition Strong negative anomaly in δ13C values at the PETM Lower boundary GSSP Dababiya section, Luxor, Egypt 25°30′00″N...
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Hydroxyarchaeol (section δ13C Isotope ratio analysis)
sediment hydroxyarchaeol had very depleted δ13C at methane seeps. Both the methane and DIC present also had depleted δ13C values, but not as a perfect match to...
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2021). "Improved Constraints on Global Methane Emissions and Sinks Using δ13C-CH4". Global Biogeochemical Cycles. 35 (6): e2021GB007000. Bibcode:2021GBioC...
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lasted from 234 to 227 Ma. At the Carnian-Norian boundary occurred a positive δ13C excursion believed to signify an increase in organic carbon burial. From...
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2019). "Sea level, carbonate mineralogy, and early diagenesis controlled δ13C records in Upper Ordovician carbonates". Geology. 48 (2): 194–199. doi:10...
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symbol. Per mille may be used to express stable-isotope ratios—for example: "δ13C was measured at −3.5‰" In Italy, it is possible to nominate a charity or...
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San Luis Potosí, inhabited closed vegetation, based on the individual's δ13C signature. Consuming C3 resources, its diet may have incorporated local C3...
233 KB (20,944 words) - 20:04, 12 August 2024
P.; Hillier, C.; Riding, J. B.; Kendrick, C. (2015). "The application of δ13C, TOC, C/N geochemistry to reconstruct Holocene relative sea levels and paleoenvironments...
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The carbon isotopic ratio is expressed between carbon-13 and carbon-12 as δ13C relative to the international standard. The hydrogen isotopic ratio between...
20 KB (2,077 words) - 16:24, 5 January 2024