MAGNETIC MEASUREMENTS OF GREENLAND AND HIMALAYAN ICE-CORE SAMPLES

This paper summarizes Isothermal Remanence (IRM(300mT)) measurements f rom Holocene ice-core samples from two contrasting glaciological regim es: (i) the Greenland ice sheet and (ii) a Himalayan glacier. Cores ha d been previously characterized in terms of chronologies, geochemistry and, for the Himalayan core, microparticle concentrations. Six sample s from the Greenland 20-D ice core from the time period AD 1876-1983 d id not yield magnetic measurements above instrumental noise-level. Sig nificant Isothermal Remanence measurements (IRM(300mT)) were obtained from some levels in the Himalayan ice core. Scanning electron microsco py and EDAX analyses indicate weathered crustal material. The techniqu es used require ice-core samples with relatively high dust loadings an d/or larger volume ice samples.