Using Mg Isotopes to Trace Cyanobacterially Mediated Magnesium Carbonate Precipitation in Alkaline Lakes

@article{Shirokova2012UsingMI,
  title={Using Mg Isotopes to Trace Cyanobacterially Mediated Magnesium Carbonate Precipitation in Alkaline Lakes},
  author={Liudmila S. Shirokova and Vasileios Mavromatis and Irina Bundeleva and Oleg S. Pokrovsky and Pascale B{\'e}n{\'e}zeth and Emmanuelle G{\'e}rard and Christopher R. Pearce and Eric H. Oelkers},
  journal={Aquatic Geochemistry},
  year={2012},
  volume={19},
  pages={1-24}
}
This study assesses the potential use of Mg isotopes to trace Mg carbonate precipitation in natural waters. Salda Lake (SW Turkey) was chosen for this study because it is one of the few modern environments where hydrous Mg carbonates are the dominant precipitating minerals. Stromatolites, consisting mainly of hydromagnesite, are abundant in this lake. The Mg isotope composition of incoming streams, groundwaters, lake waters, stromatolites, and hydromagnesite-rich sediments were measured… 
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References

SHOWING 1-10 OF 112 REFERENCES
Magnesium isotope fractionation during inorganic and cyanobacteria-induced hydrous magnesium carbonate precipitation
Some of the largest measured Mg isotope variations are found in carbonate rocks, with a∼2 h δ Mg difference between dolostone and limestone suggesting a strong mineralogical control on Mg isotope
Hydromagnesite Stromatolites and Sediments in an Alkaline Lake, Salda Golu, Turkey
ABSTRACT Salda Lake in SW Turkey is a highly alkaline (pH > 9) water body with waters enriched in magnesium. Microbial stromatolites along shorelines contain a microflora of diatoms and cyanobacteria
Constraining magnesium cycling in marine sediments using magnesium isotopes
Freshwater Carbonate Sedimentation
Carbonate minerals are a common constituent of lacustrine sediments. The great variability with respect to geological setting, climatic environment, water chemistry, and biological activity limits
Magnesium isotope fractionation during hydrous magnesium carbonate precipitation with and without cyanobacteria
Magnesium stable isotope fractionation in marine biogenic calcite and aragonite
A hydrous Ca-bearing magnesium carbonate from playa lake sediments, Salines Lake, Spain
Abstract Sediments of playa Lake Salines, SE, Spain, contain a carbonate mineral characterized by X-ray diffraction peaks very similar to, but systematically shifted from those of pure magnesite.
A hydrous Ca-bearing magnesium carbonate from playa lake sediments , Salines Lake , Spain
Sediments of playa Lake Salines, SE, Spain, contain a carbonate mineral characterized by X-ray diffraction peaks very similar to, but systematically shifted from those of pure magnesite. Analyses
Mg isotopic composition of carbonate: insight from speleothem formation
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