Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
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TLDR
In this paper, Niee's and Solenhofen standards were compared to the Chicago PDB standard for carbon and oxygen isotope ratios, and the correction factors for instrumental effects and for the nature of the mass spectra were derived.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1957-01-01. It has received 4071 citations till now. The article focuses on the topics: Carbon & Carbon dioxide.read more
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Methane stable isotopic ratios and concentrations as indicators of methane dynamics in estuaries
TL;DR: In this paper, mixing diagrams of CH4 concentration and stable isotopic ratio (δ13C-CH4) were used to examine the fate of river-borne CH4 as it crosses a variety of estuaries: Columbia River (Oregon/Washington), Parker River (Massachusetts), Great Bay (New Hampshire), Kaneohe Bay (Hawaii), and Elkhorn Slough (California).
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Mechanisms of contamination in Lesser Antilles island arc magmas from radiogenic and oxygen isotope relationships
TL;DR: In this paper, the effects of varying magma chemistry on δ18O (through differentiation) by normalising to the chemical index of Garlick were investigated, and it was concluded that the range in Δ18O values measured cannot result from hydrothermal interaction or weathering alone, although limited alteration of a few samples may be responsible for some scatter in the oxygen isotope data.
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Multi-component carbon isotope evidence of early Holocene environmental change and carbon-flow pathways from a hard-water lake in northern Sweden
TL;DR: In this paper, a 9000-year carbonate-rich sediment sequence from a small hard-water lake in northernmost Sweden was studied by means of multi-component stable carbon isotope analysis.
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Methane-derived marine carbonates of pleistocene age.
John C. Hathaway,Egon T. Degens +1 more
TL;DR: In some calcium carbonate-bearing sandstones from the edge of the continental shelf off the northeast United States, the δC13 range is from -30 and -60 per mil for both aragonite and high-magnesium calcite, suggesting deposition at temperatures around 0�C.
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Metabolism of 13C-labeled linoleic acid in newborn infants during the first week of life.
TL;DR: The proportion of linoleic acid oxidized to CO2 did not correlate with the estimated conversion to long-chain polyunsaturated metabolites, and areas under the curve of plasma tracer concentration over time were calculated for plasma n-6 phospholipid fatty acids.
References
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Journal ArticleDOI
On the Isotopic Chemistry of Carbonates and a Paleotemperature Scale
TL;DR: In this paper, the temperature variation of the fractionation of oxygen in exchange reactions between dissolved carbonate and water and between calcite and water was calculated on theoretical grounds, and checked experimentally.
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Variation of O18 content of waters from natural sources
S Epstein,Toshiko K. Mayeda +1 more
TL;DR: A number of marine water and fresh water samples were examined for the relative O18O16 ratio, and the variation of this ratio was determined to a precision of ± 1% as mentioned in this paper.
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Revised carbonate-water isotopic temperature scale
TL;DR: The relationship between temperature and O(18) content relative to that for a Cretaceous belemnite of the Pee Dee formation previously reported (Epstein, Buchsbaum, Lowenstam, and Urey, 1951) has been re-determined using modified procedures for removing organic matter from shells, and is found to be 16.5 - 4.3 δ + 0.14 δ^2
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The geochemistry of the stable carbon isotopes
TL;DR: A survey of the variation of the ratio C13/C12 in nature can be found in this paper, where Urey and his co-workers used two complete feed systems with magnetic switching to determine small differences in isotope ratios between samples and a standard gas.