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

Yagmur Gunes, Nurgul Balci*

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2 Atıf (Scopus)

Özet

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.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)58-78
Sayfa sayısı21
DergiAntarctic Science
Hacim34
Basın numarası1
DOI'lar
Yayın durumuYayınlandı - 18 Şub 2022

Bibliyografik not

Publisher Copyright:
Copyright © Antarctic Science Ltd 2022.

Finansman

This study was carried under the auspices of the Presidency of the Republic of Turkey, supported by the Ministry of Industry and Technology, and coordinated by Istanbul Technical University (ITU) Polar Research Center (PolReC). This study was conducted within the frame of the bilateral agreement with the Polish Institute of Biochemistry and Biophysics (IBB) and PolReC. This project was supported by TUBITAK (the Scientific and Technological Research Council of Turkey, grant 119Y411) to N. Balci and by the ITU Scientific Research Projects Division (Project ID: 41729).

FinansörlerFinansör numarası
ITU Scientific Research Projects Division41729
Ministry of Industry and Technology
TUBITAK
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu119Y411
Istanbul Teknik Üniversitesi

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