Results 11 to 20 of about 1,259,928 (152)

Paradoxically lowered oxygen isotopes of hydrothermally altered minerals by an evolved magmatic water [PDF]

open access: yesScientific Reports, 2022
It has been well known that the influxing meteoric water can hydrothermally lower oxygen and hydrogen isotopes of rocks and/or minerals during continental magmatic or metamorphic processes in certain appropriate cases.
Chun-Sheng Wei, Zi-Fu Zhao
doaj   +2 more sources

Author Correction: Constraining the rise of oxygen with oxygen isotopes [PDF]

open access: yesNature Communications, 2020
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
B. A. Killingsworth   +5 more
doaj   +2 more sources

Progress of Analytical Techniques and Application of Triple Oxygen Isotopes in Dissolved Oxygen [PDF]

open access: yesJournal of Isotopes
Oxygen is one of the essential elements in Earth's ecosystem,with stable isotopes including δ16O,δ17O,and δ18O. The composition of oxygen stable isotopes (δ17O,δ18O) exhibits different fractionation patterns in various biogeochemical reactions,making ...
Hongmin ZHENG   +3 more
doaj   +2 more sources

Constraining the rise of oxygen with oxygen isotopes [PDF]

open access: yesNature Communications, 2019
The loss of anomalous sulfur isotope compositions from sedimentary rocks has been considered a symptom of permanent atmospheric oxygenation. Here the authors show sulfur and oxygen isotope evidence from 
B. A. Killingsworth   +5 more
doaj   +2 more sources

A Critical Look at the Combined Use of Sulfur and Oxygen Isotopes to Study Microbial Metabolisms in Methane-Rich Environments [PDF]

open access: yesFrontiers in Microbiology, 2018
Separating the contributions of anaerobic oxidation of methane and organoclastic sulfate reduction in the overall sedimentary sulfur cycle of marine sediments has benefited from advances in isotope biogeochemistry.
Gilad Antler   +3 more
doaj   +2 more sources

Evolution of ancient hydrothermal fluids theoretically inverted with initial oxygen isotopes of water [PDF]

open access: yesScientific Reports
While great successes have been achieved during past decades, oxygen isotopic endmembers of water were implicitly adopted by previous studies for quantifying fossil hydrothermal systems worldwide.
Chun-Sheng Wei, Zi-Fu Zhao
doaj   +2 more sources

Oxygen isotopes and lakes [PDF]

open access: yes, 2014
Isotopes are variations of a particular chemical element. It is all to do with the number of neutrons. Oxygen has two main isotopes: 18O which has 10 neutrons and 8 protons; and 16O which has 8 neutrons and 8 protons.
Dean, Jonathan, Leng, Melanie
core   +4 more sources

Triple Oxygen Isotope Paleoaltimetry of Crystalline Rocks

open access: yesFrontiers in Earth Science, 2021
Triple oxygen isotopes of hydrothermally altered minerals from crystalline rocks can be used to determine past elevations of mountain ranges. This method uses all three isotopes of oxygen (16O, 17O, and 18O) to create arrays that can be extrapolated back
C. Page Chamberlain   +6 more
doaj   +1 more source

Constraints on carbonate diagenetic fluid properties by microzone in situ analysis of carbon and oxygen isotopes: a case study of Cambrian-Ordovician, Tarim Basin

open access: yesShiyou shiyan dizhi, 2023
As an important technological measure to uncover complex sedimentary-diagenetic process, microzone in situ geochemical analysis has drawn more and more attention along with improving analytical and test levels.
Jun HAN   +4 more
doaj   +1 more source

Presenting the Compendium Isotoporum Medii Aevi, a Multi-Isotope Database for Medieval Europe

open access: yesScientific Data, 2022
Measurement(s) Isotopes Technology Type(s) Mass Spectrometry Factor Type(s) Carbon isotopes • nitrogen isotopes • sulfur isotopes • oxygen isotopes • strontium isotopes Sample Characteristic - Organism Humans • Animals • Plants Sample Characteristic ...
Carlo Cocozza   +4 more
doaj   +1 more source

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