Tracing dissolved O2 and dissolved inorganic carbon stable isotope dynamics in the Nyack aquifer: Middle Fork Flathead River, Montana, USA

2011 ◽  
Vol 75 (20) ◽  
pp. 5971-5986 ◽  
Author(s):  
M. Garrett Smith ◽  
Stephen R. Parker ◽  
Christopher H. Gammons ◽  
Simon R. Poulson ◽  
F. Richard Hauer
Keyword(s):  
Stable Isotope ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Carbon Stable Isotope ◽  
Middle Fork ◽  
Flathead River ◽  
Dissolved O2

scholarly journals Note on the stable isotope values of vein calcite in the El-Seboah peralkaline granite (SW Egypt)

Mineralogia ◽  
2011 ◽  
Vol 42 (2-3) ◽  
pp. 113-120 ◽  
Author(s):  
Kamaleldin Hassan
Keyword(s):  
Stable Isotope ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
The Other ◽  
Peralkaline Granite ◽  
Isotope Data ◽  
Other Hand ◽  
Calcite Deposition ◽  
Stable Isotope Data

Note on the stable isotope values of vein calcite in the El-Seboah peralkaline granite (SW Egypt)Stable isotope data for carbon (δ13C) and oxygen (δ18O) are used to constrain the environments of calcite formation in two veins in the El-Seboah peralkaline granite in south-western Egypt. Vein I with calcite-magnetite-goethite-hematite-quartz, and vein II with calcite-magnetite-goethite-kaolinite-hematite-quartz are texturally distinct. The calcite of each vein has characteristic δ13C- and δ18O-values: + 0.32 and -7.28‰ for vein I and + 1.16 and - 1.21‰ for vein II, respectively. The observed differences between the δ13C values of the two veins indicate that they represent two separate systems of primary dissolved inorganic carbon formed at or near equilibrium with atmospheric CO2. The δ18O values, on the other hand, indicate calcite deposition from meteoric waters which were fresh for vein I and brackish for vein II.

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