Magnetic measurements of Greenland and Himalayan ice-core samples

• Published in: The Holocene
• Main Authors: Sahota, J. T. S., Mayewski, Paul A., Oldfield, F., Twickler, Mark S.
• Format: Text
• Language: unknown
• Published: University of New Hampshire Scholars' Repository 1996
• Subjects: Ice cores; magnetic measurements; dust loadings; Greenland; Himalaya; glacier; ice core; Ice Sheet
• Online Access: https://scholars.unh.edu/faculty_pubs/355; https://doi.org/10.1177/095968369600600411

This paper summarizes Isothermal Remanence (IRM300mT) measurements from Holocene ice-core samples from two contrasting glaciological regimes: (i) the Greenland ice sheet and (ii) a Himalayan glacier. Cores had been previously characterized in terms of chronologies, geochemistry and, for the Himalayan core, microparticle concentrations. Six samples from the Greenland 20-D ice core from the time period AD 1876-1983 did not yield magnetic measurements above instrumental noise-level. Significant Isothermal Remanence measurements (IRM300mT) were obtained from some levels in the Himalayan ice core. Scanning electron microscopy and EDAX analyses indicate weathered crustal material. The techniques used require ice-core samples with relatively high dust loadings and/or larger volume ice samples.