2024-03-29T09:31:47Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/367762022-11-17T02:08:08Zhdl_2115_35168hdl_2115_34816hdl_2115_116On the Nature of Remanence in the 1985 Andesitic Pumice with Self-Reversed Magnetization from Nevado del Ruiz, ColombiaFujiwara, Yoshiki1000060374203Gautam, PitambarYoshida, MitsuoKatsui, Yoshioopen access450The magnetic remanence of the andesitic pumice of the Nevado del Ruiz 1985 eruption has the multi-component nature. The major normal component behavior is due to the titanomagnetite phase with variable chemistry. The major reverse component has a peak demagnetization and acquisition range between 200°-225℃ but no such mineral phase could be detected. The titanomagentite phase contributes to the major normal component and has probably no relation to the reverse magnetization.北海道大学Hokkaido University1992-08engdepartmental bulletin paperVoRhttp://hdl.handle.net/2115/367760018-3474北海道大学理学部紀要Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy232167174https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/36776/1/23-2_p167-174.pdfapplication/pdf2.51 MB1992-08