ABOUT THE INCORRECTNESS OF Yu.K. VASIL'CHUK'S METHOD FOR THE RECONSTRUCTION OF PALEOTEMPERATURES USING ISOTOPE COMPOSITION OF WEDGE ICE. Review of the article by Yu.K. Vasil'chuk, A.C. Vasil'chuk Review of the article by Yu.K. Vasil'chuk, A.C. Vasil'chuk "Air January paleotemperature reconstruction 48-15 calibrated ka BP using oxygen isotope ratios from Zelyony Mys Yedoma"

2021 ◽  
Keyword(s):  
Oxygen Isotope ◽  
Isotope Composition ◽  
Isotope Ratios ◽  
Oxygen Isotope Ratios

scholarly journals Potential Reference Materials for Hematite Oxygen Isotope Analysis

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 987
Author(s):  
Lianjun Feng ◽  
Hongwei Li ◽  
Tiejun Li
Keyword(s):  
Oxygen Isotope ◽  
Iron Oxides ◽  
Oxygen Isotopes ◽  
Reference Materials ◽  
Isotope Composition ◽  
Isotope Analysis ◽  
Isotope Ratios ◽  
Bulk Rock ◽  
Accurate Analysis ◽  
Oxygen Isotope Ratios

Hematite is a potential mineral for reconstructing the oxygen isotope composition and paleotemperature of paleowater. A highly accurate analysis of oxygen isotopes is essential. However, relative to other oxygenated minerals, we lack hematite reference materials that allow for internationally comparable analyses between different laboratories. To address this issue, we attempted to perform bulk rock oxygen isotope analysis on five hematite reference materials (GBW07223a, GBW07825, YSBC28740-95, YSBC28756-2008, Harvard 92649). Meanwhile, the oxygen isotope ratios of iron oxides (GBW07223a, GBW07825, YSBC28740-95, YSBC28756-2008) were obtained by mass balance involving other oxygen-bearing minerals such as quartz and silicates. In addition, the oxygen isotope ratios of iron oxides in an oolitic hematite (ca. 1.65 billion years ago) are consistent with the results of previous analyses of this class of minerals.

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