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dc.contributor.authorRath, A.
dc.contributor.authorJoju, G.S.
dc.contributor.authorWarrier, A.K.
dc.contributor.authorChaparro, M. A.E.
dc.contributor.authorBadesab, F.K.
dc.contributor.authorVenkateshwarlu, M.
dc.contributor.authorMahesh, B.S.
dc.contributor.authorMohan, R.
dc.date.accessioned2025-07-04
dc.date.accessioned2025-07-04T06:45:19Z
dc.date.available2025-03-29
dc.date.available2025-07-04T06:45:19Z
dc.date.issued2025
dc.identifier.citationGeoderma Regional, vol. 41; 2025; Article no:e00954
dc.identifier.issn2352-0094
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S2352009425000392
dc.identifier.urihttps://doi.org/10.1016/j.geodrs.2025.e00954
dc.identifier.urihttp://drs.nio.res.in/drs/handle/2264/9443
dc.descriptionIF2023= 3.1
dc.description.abstractWe determined and discussed the mineral magnetic properties of the soil samples (n�=�78) from the Schirmacher Oasis, East Antarctica. Environmental magnetism analysis was conducted to identify the mechanisms controlling the formation and distribution of iron oxide minerals such as magnetite and hematite. Magnetic susceptibility (?lf) exhibited a mean (� SD) value of 109.5 (� 76.6)�נ10?8 m3kg?1, indicating the presence of magnetically strong minerals. A statistically significant correlation (r�=�0.79; p�<�0.01) between ?lf and saturation isothermal remanent magnetization (SIRM), the S-ratio values (0.97�0.99) and temperature-dependent magnetization measurements, suggests that low-coercivity magnetic minerals, such as magnetite, primarily regulate the magnetic signal. The percentage of frequency-dependent susceptibility remains below 2�% for most samples, indicating an insignificant presence of ultrafine superparamagnetic grains. The ?ARM/SIRM parameter (mean (� SD) values of 53.7 (� 26.3)�נ10?5�mA?1) suggests a predominance of coarse-grained magnetic minerals, while magnetic hysteresis parameters indicate the dominance of multidomain magnetic grains, with minor proportions of single-domain and superparamagnetic grains. Various inter-parametric ratios reveal the absence of bacterial magnetite, anthropogenic magnetite, and authigenic greigite, suggesting that the magnetic minerals in these Antarctic soils from Schirmacher Oasis predominantly result from weathering processes.
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleEnvironmental magnetism linked to weathering processes: A study on surface soils from an East Antarctic oasis,
dc.typeJournal Article
dc.affiliation.authorDepartment of Sciences, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India


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