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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Groundwater hydrogeochemical formation and evolution in a karst aquifer system affected by anthropogenic impacts.
Xiancang Wu,Changsuo Li,Bin Sun,Fuqiang Geng,Shuai Gao,Minghui Lv,Ma Xueying,Hu Li,Liting Xing +8 more
TL;DR: The study suggests that karst groundwater quality is dominated by water–rock interactions and elucidates the influence of anthropogenic nitrogen, and is a good reference point to study anthropogenic influences on the groundwater environment and to protect karSt groundwater globally.
Journal ArticleDOI
The Na'aman springs, northern israel: Salination mechanism of an irregular freshwater-seawater interface
TL;DR: In the Na'aman catchment area, it was previously assumed that high salinities in this area were due to fossil brackish water or connate seawater, however, the chemical composition of the water indicates contamination by present seawater.
Journal ArticleDOI
Carbon isotopic study on graphite and carbonate in the Kamioka mining district, Gifu Prefecture, central Japan, in relation to the role of graphite in the pyrometasomatic ore deposition
TL;DR: In this paper, the oxygen fugacity of pyrometasomatic lead-zinc ore deposits of the Kamioka mine was estimated to be from 10−31,4 to 10−301 bars at 350 °C and total pressure of 1,000 bars.
Journal ArticleDOI
A Late Pleistocene to Holocene Record of Precipitation Reflected in Margaritifera falcata Shell δ18O From Three Archaeological Sites in the Lower Salmon River Canyon, Idaho
TL;DR: Oxygen-18 (δ18O) concentrations in Margaritifera falcata shells preserved in three archaeological sites in the Lower Salmon River Canyon of Idaho are compared with modern mussel shells as discussed by the authors.
Journal ArticleDOI
Combined boron, radiogenic (Nd, Pb, Sr), stable (C, O) isotopic and geochemical investigations of carbonatites from the Blue River Region, British Columbia (Canada): Implications for mantle sources and recycling of crustal carbon
Okay Çimen,Okay Çimen,Corinne Kuebler,Stefanie S. Simonetti,Loretta Corcoran,Roger H. Mitchell,Antonio Simonetti +6 more
TL;DR: In this article, the authors reported the combined major, minor and trace element compositions, and stable (C, O), radiogenic (Nd, Pb, and Sr) isotopic compositions for the Fir, Felix, Gum, and Howard Creek carbonatites from the Blue River Region, British Columbia, Canada.
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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.