Preservation and alteration of inclusion-based calcite-water oxygen isotope and clumped isotope temperature signals in calcite veins [PDF]
Scientific ReportsKnowledge of the formation temperatures of geological deposits is essential for investigating their genesis. Oxygen isotope thermometry (OIT), using the temperature dependence of oxygen isotope fractionation between host carbonate mineral and mineral ...
Attila Demény +3 more
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Oxygen Isotope Fractionation between Carbonate Minerals and Carbonic Acid Systems and Constraints for Environmental Science and Geological Processes [PDF]
MoleculesThe equilibrium oxygen isotope fractionation factor is widely used in geological thermometry. However, under most natural conditions, the oxygen isotope exchange is rare to reach equilibrium. Especially for the complex water–rock interaction process, the
Jixi Zhang
doaj +2 more sources
Century-to-millennial scale climatic variability in Lake Malawi revealed by isotope records. [PDF]
, 2007 Diatom-based oxygen isotope data (δ18Odiatom) from Lake Malawi show multi-centennial scale wetâ dry intervals spaced approximately every 2.3 ka throughout a 25 ka sequence.
Leng, Melanie J. +3 more
core +6 more sources
Oxygen isotope ecology of recent planktic foraminifera at the central Walvis Ridge (SE Atlantic) [PDF]
, 2005 Above the Walvis Ridge, in the SE Atlantic Ocean, we collected living plantkic foraminifera from the upper water column using depth stratified plantkon tows. The oxygen isotope composition (
Kroon, Dirk +10 more
core +1 more source
Carbon and Oxygen Isotope Analysis of Calcite and Dolomite Mixtures Using Selective Acid Extraction by Gasbench-IRMS [PDF]
Zhipu Xuebao, 2022 Carbonate cements formed at different stages in sandstone have different mineral compositions, structural characteristics and carbon and oxygen isotope compositions.
HAN Juan +6 more
doaj +1 more source
The Precambrian marine carbonate isotope database: version 1.1. [PDF]
, 2002 We present a compilation of strontium, carbon, and oxygen isotope compositions of roughly 10,000 marine carbonate rocks of Archean - Ordovician age (3800 Ma – 450 Ma).
Shields, GA +5 more
core +1 more source
Application of Modified DDARP Method for Purification of Barite in Natural Water Samples
Yankuang ceshi, 2019 BACKGROUND Diethylenetriaminepentaacetic acid (DTPA) dissolution and reprecipitation (DDARP) method is used frequently to eliminate encapsulated nitrate during barite precipitation. However, the effect of DDARP on barite precipitated from different kinds
ZHANG Dong +6 more
doaj +1 more source
Stable oxygen and carbon isotope compositional fields for skeletal and diagenetic components in New Zealand Cenozoic nontropical carbonate sediments and limestones: A synthesis and review [PDF]
, 1996 The stable oxygen isotope composition (δ18O) of a precipitated carbonate depends mainly on the isotope composition, salinity, and temperature of the host fluid, whereas the stable carbon isotope composition (δ13C) reflects the source of CO2 for ...
Nelson, Campbell S. +3 more
core +1 more source
Angewandte Chemie, 2019 Nickel iron oxide is considered a benchmark nonprecious catalyst for the oxygen evolution reaction (OER). However, the nature of the active site in nickel iron oxide is heavily debated.
Seunghwan Lee +3 more
semanticscholar +1 more source
Antarctic Record, 1977 The oxygen isotope ratio determined from CO_2 equilibrated isotopically with the water sample provides the oxygen isotope activity ratio of the water sample.
Kikuo KATO
doaj +1 more source