Browsing by Author "O'Neil J.R."
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Browsing by Author "O'Neil J.R."
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Kim S.T.; O'Neil J.R. (1997)A suite of divalent metal (Ca, Cd, Ba) carbonates was synthetized over the temperature range 10-40°C by the classical method of slowly bubbling N2 through a bicarbonate solution. It was discovered that carbonates could be ...
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Vennemann T.W.; Fricke H.C.; Blake R.E.; O'Neil J.R.; Colman A. (2002)A comparison has been made of oxygen isotope analyses of natural and synthetic phosphates using three methods in current use and Ag3PO4 as the analyte. Of these methods, conventional fluorination using BrF5 provides the ...
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OXYGEN ISOTOPE FRACTIONATION BETWEEN DIATOMACEOUS SILICA AND WATER - IMPLICATIONS AND APPLICATIONS Brandriss M.E.; O'Neil J.R.; Edlund M.B.; Stoermer E.F. (1998)The temperature dependence of the oxygen isotope fractionation between diatomaceous silica and water was determined by analyzing frustules of freshwater diatoms cultured in the laboratory at temperatures ranging from 3.6 ...
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Blake R.E.; O'Neil J.R.; Garcia G.A. (1997)Microbial activity has been invoked to explain anomalous oxygen isotope compositions of phosphate mineral deposits as well as fossil biogenic apatite. Results of laboratory experiments on enzyme-mediated reactions of ...
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Fricke H.C.; O'Neil J.R. (1999)Correlations between mean annual temperature (MAT) and the weighted average oxygen isotope composition of yearly precipitation (δ18Opt) are well-known, but the utility of modern relations to make reliable estimates of ...
Now showing items 1-5 of 5