scholarly journals Palaeoenvironmental changes recorded in the oxygen and carbon isotope composition of Kimmeridgian (Upper Jurassic) carbonates from central Poland

2019 ◽  
Author(s):  
Hubert WIERZBOWSKI
Keyword(s):  
Carbon Isotope ◽  
Isotope Composition ◽  
Upper Jurassic ◽  
Carbon Isotope Composition ◽  
Oxygen And Carbon Isotope ◽  
Central Poland ◽  
Palaeoenvironmental Changes

scholarly journals Stable Oxygen and Carbon Isotope Composition of Holocene Mytilidae from the Camarones Coast (Chubut, Argentina): Palaeoceanographic Implications

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3464
Author(s):  
Gabriella Boretto ◽  
Giovanni Zanchetta ◽  
Ilaria Consoloni ◽  
Ilaria Baneschi ◽  
Massimo Guidi ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Carbon Isotope ◽  
Isotope Composition ◽  
Temperature Shift ◽  
Carbon Isotope Composition ◽  
Isotopic Shift ◽  
Stable Isotope Composition ◽  
Oxygen And Carbon Isotope ◽  
Stable Oxygen ◽  
Southern Westerlies

The stable isotope composition of living and of Holocene Mytilidae shells was measured in the area of Camarones (Chubut, Argentina). The most striking results were the high δ18O values measured in samples older than ca. 6.1 cal ka BP. In the younger samples, the δ18O values remained substantially stable and similar to those of living specimens. Analysis of the data revealed the possibility for this isotopic shift to be driven mainly by changes in temperature probably accompanied by minor changes in salinity, suggesting cooler seawater before 6.1 cal ka BP, with a maximum possible temperature shift of ca. 5 °C. A possible explanation of this change can be related to a northward position of the confluence zone of the Falkland and Brazilian currents. This is consistent with the data obtained in marine cores, which indicate a northerly position of the confluence in the first half of the Holocene. Our data are also in line with the changes in wind strength and position of the Southern Westerlies Wind, as reconstructed in terrestrial proxies from the Southernmost Patagonia region.

Oxygen and carbon isotope composition of structural carbonate in weathering apatites from laterites, southern Brazil and western Senegal

1993 ◽  
Vol 8 (6) ◽  
pp. 617-632 ◽  
Author(s):  
Jean-Pierre Girard ◽  
René Flicoteaux ◽  
Anne-Véronique Walter ◽  
Samuel M. Savin ◽  
Daniel Nahon
Keyword(s):  
Carbon Isotope ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Southern Brazil ◽  
Oxygen And Carbon Isotope

Effects of environmental factors and species identity on oxygen and carbon isotope composition of teeth in recent small mammals of the Urals

2014 ◽  
Vol 45 (2) ◽  
pp. 136-142 ◽  
Author(s):  
T. A. Velivetskaya ◽  
N. G. Smirnov ◽  
S. I. Kiyashko ◽  
A. V. Ignat’ev ◽  
G. V. Olenev ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Carbon Isotope ◽  
Small Mammals ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
The Urals ◽  
Species Identity ◽  
Oxygen And Carbon Isotope
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