The Catalytic Effect of the Heterotrophic Bacterium <i>Virgibacillus marismortui</i> on Basaltic Rock Dissolution Under Excess Nutrient Conditions

Güneș, Yaǧmur; Balcı, Nurgül

doi:10.1080/01490451.2020.1852453

Cited by 5 publications

(1 citation statement)

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“…However, the factors controlling the geochemical and mineralogical compositions of the sediment and water chemistry characteristics of different reservoirs are complex. Dissolution mechanisms and elemental flux of mafic/ultramafic Maritime Antarctic rocks have been investigated experimentally by Gunes & Balci (2021), including the effects of microorganisms. There are unfortunately few studies dealing with the water and particularly sediment geochemistry records of different reservoirs of the Maritime Antarctic (i.e.…”

Section: Introductionmentioning

confidence: 99%

Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula

Güneș

Balcı

2022

Antarctic Science

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We used a multidisciplinary approach integrating major, trace and rare earth element geochemistry, mineralogy of rocks and sediments along with the ionic composition of water reservoirs of Admiralty Bay, King George Island, to evaluate the record of water-rock interactions under Maritime Antarctic conditions. Our results showed that the ionic compositions of the streams and meltwaters predominantly reflect the atmospheric inputs, while lake waters have higher Na/Cl, Ca/Mg and HCO3/Cl ratios related to chemical weathering in lake sediments, but this did not allow for distinguishing purely silicate sources. Consistent with the trace and rare earth element data, various alteration indices and Index of Compositional Variability values denote the low degree of chemical weathering in the lake sediments. The records from the previously unexplored Mud Lake and Upper Lake suggest that the lakes of Admiralty Bay are better places to trace the impacts of a succession of environmental changes that have occurred in the watershed, while the stream channel sediments, when accompanied by water chemistry data, may provide a more representative composition of the source rocks than the lake sediments. These findings may help revealing the intensity of contemporary weathering in a colder climate with relatively few mineralogical changes accompanied by a lesser degree of elemental loss.

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Section: Introductionmentioning

confidence: 99%