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Isothermal remanence experiments at room and at liquid nitrogen temperature: Application to soil studies
Author(s) -
Bógalo María Felicidad,
Heller Friedrich,
Osete María Luisa
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl012032
Subject(s) - remanence , environmental magnetism , superparamagnetism , rock magnetism , ferrimagnetism , coercivity , hematite , magnetism , materials science , ferromagnetism , geology , mineralogy , magnetic mineralogy , magnetization , magnetic field , condensed matter physics , magnetite , metallurgy , physics , quantum mechanics
A simple magnetic mineral identification technique is proposed which measures isothermal remanent magnetisation (IRM) acquired in different field strengths at 293 K and 77 K. Magnetic parameters are introduced that use these IRMs in order to distinguish concentration and type of ferromagnetic minerals in different magnetic states. The method determines easily contributions of superparamagnetic ferrimagnetic minerals in environmental magnetism studies. In addition, high coercivity goethite and possibly superparamagnetic hematite are identified. The analysis of the magnetic properties of a soil profile on a Late Pleistocene terrace from the Jarama river in central Spain is given as an example.