Interplay between abiotic and microbial biofilm‐mediated processes for travertine formation: Insights from a thermal spring ( Piscine Carletti , Viterbo, Italy)

Autor: Stefania Venturi, Simona Crognale, Francesco Di Benedetto, Giordano Montegrossi, Barbara Casentini, Stefano Amalfitano, Tommaso Baroni, Simona Rossetti, Franco Tassi, Francesco Capecchiacci, Orlando Vaselli, Stefano Fazi
Rok vydání: 2022
Předmět:
Zdroj: Geobiology. 20:837-856
ISSN: 1472-4669
1472-4677
Popis: Active hydrothermal travertine systems are ideal environments to investigate how abiotic and biotic processes affect mineralization mechanisms and mineral fabric formation. In this study, a biogeochemical characterization of waters, dissolved gases, and microbial mats was performed together with a mineralogical investigation on travertine encrustations occurring at the outflow channel of a thermal spring. The comprehensive model, compiled by means of TOUGHREACT computational tool from measured parameters, revealed that mineral phases were differently influenced by either abiotic conditions or microbially driven processes. Microbial mats are shaped by light availability and temperature gradient of waters flowing along the channel. Mineralogical features were homogeneous throughout the system, with euhedral calcite crystals, related to inorganic precipitation induced by CO
Databáze: OpenAIRE
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