Notes on magnetic properties of Antarctic polymict eucrites

• Main Authors: Takesi Nagata, Minoru Funaki
• Format: Report
• Language: English
• Published: National Institute of Polar Research 1984
• Subjects: Antarctic; Curie Point; Yamato; Antarc*; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1735; http://id.nii.ac.jp/1291/00001735/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1735&item_no=1&attribute_id=18&file_no=1

The magnetic properties of 3 newly collected Antarctic polymict eucrites, Yamato-75011,-790122 and -790266 are examined. The measured magnetic properties are characteristics of magnetic hysteresis curves and thermomagnetic curves in comparison with chemical compositions of opaque minerals contained in these polymict eucrites. The ferromagnetic characters of Yamato-75011 are due to Ni-poor kamacite grains which are common in many other eucrites. However, the origin of magnetic characters of Yamato-790122 and -790266,represented by their Curie point at 540℃, is still unidentified, because opaque minerals in these two eucrites are only almost stoichiometric ilmenite and troilite, no metallic grain nor magnetite being detected.