Spectroscopy of magnetic susceptibility: Development and application

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540455
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Kochi University
• Principal Investigator: KODAMA Kazuto 高知大学, 自然科学系, 教授 (00153560)
• Co-Investigator(Kenkyū-buntansha): YAMOTO Yuhji (00452699)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 岩石磁気 / 環境磁気 / ナノ粒子 / 気候変動

Outline of Final Research Achievements

Broad-band magnetic susceptibility (MS) measurement, a novel magnetic method capable ofquantifying a narrow grain size distribution (GSD) of superparamagnetic (SP) particles by measuring low-field MS at a number of frequency steps spanning four orders of magnitude, has been developed and tested in a loess/palaeosol section at Luochuan in the Chinese Loess Plateau. The
studied succession consists of sequences from the latest palaeosol unit (S0) to the upper part of the loess unit (L2), spanning the last glacial-interglacial cycle. Results indicate that the mean volume of SP particles in this loess/palaeosol sequence tends to increase during the transition from loess→weak palaeosol→palaeosol, an indication of grain growth as pedogenesis progresses.

Free Research Field

岩石磁気学