Modern and Paleotravertines from Gorny Altai: Indicative Features
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This work reports new geochemical and stable isotope data on the Late Quaternary travertines of the southeastern Gorny Altai. The travertines are composed of Mg-calcite and Sr-aragonite, which cement the Sartan moraines and Holocene colluvium. The isotope characteristics of CaCO3 (δ13C = –4.1…+0.9‰ and δ18O = –13.8…–13.9‰, VPDB) indicate a mixed carbon source, while the oxygen source is sedimentation water of the early diagenetic stage. The formation of travertines is controlled by the following factors: faults, underlying deformed carbonate rocks, dissected relief overlain by colluvium and/or moraine sediments, and the ascending fluid flow.
This study was supported by the state assignment project no. 0330-2016-0004. Mineralogical–geochemical, isotope, and hydrogeochemical studies and interpretation of our results were supported by grant no. MK-6322.2016.5 for young Russian scientists from the President of the Russian Federation; analysis of the geological position of the objects was supported by the Russian Foundation for Basic Research (project no. 16-35-00415 mol_a).
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