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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Accurate classification of juvenile weakfish Cynoscion regalis to estuarine nursery areas based on chemical signatures in otoliths
TL;DR: The ability of trace element and isotopic signatures in otoliths to record the nursery areas of juvenile (young-of-the-year) weakfish Cynoscion regalis from the east coast of the USA to be able to use chemical signatures from the juvenile portion of adult C, reyalis otolithS to accurately classify these fish to their natal estuary.
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Carbon isotopic composition of atmospheric CH4: Fossil and biomass burning source strengths
Paul D. Quay,Stagg L. King,J. Stutsman,David Wilbur,L. P. Steele,Inez Fung,R. H. Gammon,Thomas A. Brown,G W Farwell,Pieter Meiert Grootes,F H Schmidt +10 more
TL;DR: The 13C/12C of atmospheric methane (CH4) was measured at Point Barrow (71°N, 156°W), Olympic Peninsula (48°N and 126°W) and Cape Grim (41°S, 144°E) between 1987 and 1989, and the global average δ13CPDB from these measurements (n = 208) was −47.20 ± 0.13%o as mentioned in this paper.
Journal ArticleDOI
Selective preservation and origin of petroleum-forming aquatic kerogen
TL;DR: A marine algal sapropel from Mangrove Lake, Bermuda, by 13C NMR and stable carbon isotopic methods showed that precursors of aquatic kerogen (insoluble, macromolecular, paraffinic humic substances) are primary components of algae and possibly associated bacteria.
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Accelerated Carbonation of Brucite in Mine Tailings for Carbon Sequestration
TL;DR: Recognition of mechanisms for brucite carbonation will guide ongoing work to accelerate Mg-silicate carbonation in tailings, offering the potential to offset annual mine emissions by ~22-57%.
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Isotopic compositions and probable origins of organic molecules in the Eocene Messel shale
TL;DR: It is shown that the carbon isotopic compositions of these and other biomarkers allow identification of specific sources for some materials and reconstruction of carbon flows within the lake and its sediments, and the 13C content of organic matter synthesized by lacustrine primary producers can be estimated from the observed 13Ccontent of the geoporphyrins derived from their chlorophylls.
References
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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.