Results 1 to 10 of about 24,904 (238)

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   +6 more sources

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

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

Spatial and temporal characteristics of isotopes of different water sources and implications for water circulation in mining areas

open access: yesShui kexue jinzhan, 2022
This study aimed to characterize the temporal and spatial variation in isotopes of different water sources of the Pingshuo mining area to identify the significance of coal mining activities to the regional water cycle.
Long SUN   +4 more
doaj   +1 more source

Evaluation of oxygen isotopes and trace elements in planktonic foraminifera from the Mediterranean Sea as recorders of seawater oxygen isotopes and salinity [PDF]

open access: yesClimate of the Past, 2020
The Mediterranean Sea is characterized by a relatively strong west to east salinity gradient, which makes it an area suitable for testing the effect of salinity on foraminiferal shell geochemistry.
L. K. Dämmer   +5 more
doaj   +1 more source

A dataset of the mid-brunhes period at site MD05-2925, Solomon Sea: Surface-subsurface planktonic foraminifera stable C-O isotope and Mg/Ca ratios

open access: yesData in Brief, 2021
Here we present derived thermal-hydrological variations data during the Marine isotope stages (MISs) 10–12 using surface and subsurface dwelling planktonic foraminiferal geochemical proxies of a sedimentary core of MD05-2925 (9.3oS, 151.5oE, water depth ...
Li Lo   +5 more
doaj   +1 more source

Isotopic Tracing of Perchlorate Sources in the Environment

open access: yesJournal of Chemistry, 2021
Perchlorate (ClO4−) is an emerging persistent pollutant that is ubiquitous in the environment at trace concentrations. Perchlorate ingestion poses a risk to human health because it interferes with thyroidal hormone production.
Mengnan Zhang   +6 more
doaj   +1 more source

Building Mexican isoscapes: Oxygen and hydrogen isotope data of meteoric water sampled across Mexico

open access: yesData in Brief, 2021
Oxygen and hydrogen isotope data of meteoric water samples are compiled from several States across Mexico. This dataset includes 287 oxygen and hydrogen (and deuterium excess) isotope data corresponding to meteoric water collected from the surface ...
Diana K. Moreiras Reynaga   +5 more
doaj   +1 more source

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