Journal ArticleDOI
Standard for Reporting Concentrations of Deuterium and Oxygen-18 in Natural Waters.
TLDR
A standard, based on the set of ocean water samples used by Epstein and Mayeda to obtain a reference standard for oxygen-18 data, but defined relative to the National Bureau of Standards isotopic reference water sample, is proposed for reporting both deuterium and oxygen- 18 variations in natural watersrelative to the same water.Abstract:
A standard, based on the set of ocean water samples used by Epstein and Mayeda to obtain a reference standard for oxygen-18 data, but defined relative to the National Bureau of Standards isotopic reference water sample, is proposed for reporting both deuterium and oxygen-18 variations in natural waters relative to the same water. The range of absolute concentrations of both isotopes in meteoric-waters is discussed.read more
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Nitrogen dynamic in Eurasian coastal Arctic ecosystem: Insight from nitrogen isotope
TL;DR: In this article, a field-based study of nitrogen dynamic over the Laptev Sea shelf based on isotope geochemistry is presented, showing that while most of the nitrogen found under the surface fresh water layer is of remineralized origin, some of the nitrate originates from atmospheric input and was probably transported at depth by the mixing of brine-enriched denser water during sea-ice formation.
Journal ArticleDOI
Fluid geochemistry in the Ivigtut cryolite deposit, South Greenland
TL;DR: The 1.27-Ga old Ivigtut (Ivittuut) intrusion in South Greenland is world famous for its hydrothermal cryolite deposit [Na 3 AlF 6 ] situated within a strongly metasomatised A-type granite stock as mentioned in this paper.
Journal ArticleDOI
Surface water and groundwater interaction in the upper crocodile river basin, johannesburg, south africa: environmental isotope approach
TL;DR: In this paper, an environmental isotope and stream discharge based study has been conducted in the upper Crocodile River Basin, Johannesburg, which is characterized by fractured crystalline rocks and dolomitic aquifers from which groundwater is extracted for diverse economic activities.
Journal ArticleDOI
Intercalibration of environmental isotope measurements; the program of the International Atomic Energy Agency.
TL;DR: The IAEA has implemented two parallel intercalibration programs for stable isotopes of light elements and for a radioactive isotope of hydrogen, tritium, which resulted in the preparation of reference and intercomparison materials of various types, now stored in the Agency and available upon request as mentioned in this paper.
Journal ArticleDOI
Dolomitization of Quaternary reef limestone, Aitutaki, Cook Islands
TL;DR: In this article, six holes were drilled to depths of 30-69 m in the shallow lagoon of Aitutaki in the southern Cook Islands, where they encountered pervasively dolomitized reef limestones at 36 m subbottom depth, which extended to the base of the drilled section at 69·3 m.
References
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Journal ArticleDOI
Isotopic Variations in Meteoric Waters
TL;DR: The relationship between deuterium and oxygen-18 concentrations in natural meteoric waters from many parts of the world has been determined with a mass spectrometer and shows a linear correlation over the entire range for waters which have not undergone excessive evaporation.
Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
TL;DR: 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.
Journal ArticleDOI
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.
Journal ArticleDOI
Effect of Low Concentrations of Carbon Dioxide on Photosynthesis Rates of Two Races of Oxyria.
TL;DR: Alpine plants of Oxyria digyna have higher apparent photosynthesis rates at various carbon dioxide concentrations than arctic, sea-level plants of the same species, which may be involved in the survival of plants at high elevations.