TY - JOUR
T1 - Mineral magnetic properties of surface soils from the Broknes and Grovnes Peninsula, Larsemann Hills, East Antarctica
AU - Joju, G. S.
AU - Warrier, Anish Kumar
AU - Chaparro, Marcos A.E.
AU - Mahesh, B. S.
AU - Matthew, Freddy Abraham
AU - Anusree, S.
AU - Mohan, Rahul
N1 - Funding Information:
The authors are grateful to the Director, National Centre for Polar and Ocean Research , Goa, for his support and encouragement. AKW thanks Dr. R. Shankar for providing access to the magnetic instruments used for this study, which were procured through a research project sanctioned to Dr. Shankar (DOD Sanction no.: DOD/11-MRDF/1/48/P/94-ODII/12-10-96). We are thankful to the Antarctic Logistics Division, NCPOR and members of the 33rd Indian Scientific Expedition to Antarctica for their assistance during sampling work. AKW acknowledges the financial support provided by the ESSO-National Centre for Polar and Ocean Research , Ministry of Earth Sciences , in the form of a research project (Sanction: NCPOR/2019/PACER-POP/ES-02 dated July 05, 2019) under the PACER Outreach Programme (POP) initiative, to undertake this research. We thank the editor-in-chief and two anonymous reviewers whose comments helped improve the manuscript's quality. This is NCPOR contribution number J-15/ 2023-24.
Funding Information:
The authors are grateful to the Director, National Centre for Polar and Ocean Research, Goa, for his support and encouragement. AKW thanks Dr. R. Shankar for providing access to the magnetic instruments used for this study, which were procured through a research project sanctioned to Dr. Shankar (DOD Sanction no.: DOD/11-MRDF/1/48/P/94-ODII/12-10-96). We are thankful to the Antarctic Logistics Division, NCPOR and members of the 33rd Indian Scientific Expedition to Antarctica for their assistance during sampling work. AKW acknowledges the financial support provided by the ESSO-National Centre for Polar and Ocean Research, Ministry of Earth Sciences, in the form of a research project (Sanction: NCPOR/2019/PACER-POP/ES-02 dated July 05, 2019) under the PACER Outreach Programme (POP) initiative, to undertake this research. We thank the editor-in-chief and two anonymous reviewers whose comments helped improve the manuscript's quality. This is NCPOR contribution number J-15/ 2023-24.
Publisher Copyright:
© 2023 Elsevier B.V. and NIPR
PY - 2023/12
Y1 - 2023/12
N2 - This study presents the mineral magnetic, particle size, and organic content data of surface soils from Larsemann Hills, East Antarctica. The analysis of isothermal remanent magnetization and the high specific magnetic susceptibility values –mean (±S.D.) values of 117.7 (±175.0) × 10−8m3kg−1 for Broknes Peninsula and of 330.9 (±217.4) × 10−8m3kg−1 for Grovnes Peninsula– indicate high concentrations of low-coercivity magnetic minerals. The magnetic minerals are coarse-grained in the multidomain and pseudo-single domain range, and the significant correlation between some magnetic parameters suggests the dominant control of multidomain grains. The remanent acquisition coercivity H1/2 shows mean (±S.D.) values of 38.2 (±4.9) for Broknes and 38.3 (±3.7) mT for Grovnes soils suggesting magnetite dominance. The soils lie in the sand and loamy sand textural classes, and the concentration of organic matter is very low. Values of percentage frequency-dependent susceptibility indicate insignificant proportions of superparamagnetic grains, and therefore no significant evidence for pedogenic magnetic minerals was observed in these soils. The magnetic signal of Larsemann Hills soils was primarily terrigenous with no contributions from bacterial magnetite, authigenic greigite and anthropogenic magnetic minerals.
AB - This study presents the mineral magnetic, particle size, and organic content data of surface soils from Larsemann Hills, East Antarctica. The analysis of isothermal remanent magnetization and the high specific magnetic susceptibility values –mean (±S.D.) values of 117.7 (±175.0) × 10−8m3kg−1 for Broknes Peninsula and of 330.9 (±217.4) × 10−8m3kg−1 for Grovnes Peninsula– indicate high concentrations of low-coercivity magnetic minerals. The magnetic minerals are coarse-grained in the multidomain and pseudo-single domain range, and the significant correlation between some magnetic parameters suggests the dominant control of multidomain grains. The remanent acquisition coercivity H1/2 shows mean (±S.D.) values of 38.2 (±4.9) for Broknes and 38.3 (±3.7) mT for Grovnes soils suggesting magnetite dominance. The soils lie in the sand and loamy sand textural classes, and the concentration of organic matter is very low. Values of percentage frequency-dependent susceptibility indicate insignificant proportions of superparamagnetic grains, and therefore no significant evidence for pedogenic magnetic minerals was observed in these soils. The magnetic signal of Larsemann Hills soils was primarily terrigenous with no contributions from bacterial magnetite, authigenic greigite and anthropogenic magnetic minerals.
UR - https://www.scopus.com/pages/publications/85163875367
UR - https://www.scopus.com/pages/publications/85163875367#tab=citedBy
U2 - 10.1016/j.polar.2023.100968
DO - 10.1016/j.polar.2023.100968
M3 - Article
AN - SCOPUS:85163875367
SN - 1873-9652
VL - 38
JO - Polar Science
JF - Polar Science
M1 - 100968
ER -