scholarly journals A rapid ammonium fluoride method to determine the oxygen isotope ratio of available phosphorus in tropical soils

2020 ◽  
Vol 34 (7) ◽  
Author(s):  
Verena Pfahler ◽  
Aleksandra Bielnicka ◽  
Andrew C. Smith ◽  
Steven J. Granger ◽  
Martin S.A. Blackwell ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Ammonium Fluoride ◽  
Tropical Soils ◽  
Available Phosphorus ◽  
Oxygen Isotope Ratio

scholarly journals The stable oxygen isotope ratio of resin extractable phosphate derived from fresh cattle faeces

2018 ◽  
Vol 32 (9) ◽  
pp. 703-710 ◽  
Author(s):  
Steven J. Granger ◽  
Yuguo Yang ◽  
Verena Pfahler ◽  
Chris Hodgson ◽  
Andrew C. Smith ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Oxygen Isotope Ratio ◽  
Stable Oxygen Isotope ◽  
Stable Oxygen ◽  
Cattle Faeces

Oxygen Isotope Ratios in the Crust of Iron Meteorites

1971 ◽  
Vol 26 (9) ◽  
pp. 1485-1490 ◽  
Author(s):  
K. Heinzinger ◽  
C. Iunge ◽  
M. Schidlowski
Keyword(s):  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Atmospheric Oxygen ◽  
Isotope Ratios ◽  
Oxygen Isotope Ratio ◽  
Iron Meteorites ◽  
Oxygen Isotope Ratios ◽  
Cosmic Spherules ◽  
The Difference ◽  
Extraterrestrial Material

Abstract The separation factor, aM-0= (18O/16O) magnetite/' (18O/16O) atmospheric oxygen, between the magnetite crust of iron meteorites and atmospheric oxygen has been determined to be 0.9946 ± 0.0005. It is concluded that this fractionation of the oxygen isotopes is the consequence of an equilibrium isotope effect at high temperatures. It can be assumed that this is also valid for cosmic spherules, which are mainly ablation products of iron meteorites. As these spherules are found in sediments of different geological ages, their oxygen isotope ratio can give information on the development of atmospheric oxygen. The difference of the oxygen isotope ratios between magnetite from the lithosphere and airborne magnetite can be used to distinguish between terrestrial and extraterrestrial material.

scholarly journals Contrasting shell growth strategies in two Mediterranean bivalves revealed by oxygen-isotope ratio geochemistry: The case of Pecten jacobaeus and Glycymeris pilosa

2019 ◽  
Vol 526 ◽  
pp. 23-35 ◽  
Author(s):  
Melita Peharda ◽  
Julien Thébault ◽  
Krešimir Markulin ◽  
Bernd R. Schöne ◽  
Ivica Janeković ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Shell Growth ◽  
Growth Strategies ◽  
Oxygen Isotope Ratio
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