TITLE:
The Effect of Measuring Magnetic Susceptibility of Water Samples by Starting with Isothermal Remanent Magnetization (IRM) before Anhysteretic Remanent Magnetization (ARM)
AUTHORS:
Maureen Kapute Mzuza, Samwel Mchele Limbu
KEYWORDS:
χfd, χARM, χARM/SIRM Ratio, Water Samples, Susceptibility Parameters
JOURNAL NAME:
International Journal of Geosciences,
Vol.6 No.6,
June
25,
2015
ABSTRACT: Estimating magnetic
properties of water samples by first measuring the Anhysteretic Remanent
Magnetization (ARM) before Isothermal Remanent Magnetization (IRM) is induced
has been costly due to the discard of samples measured by staring with the
latter before the former. However,
no clear understanding exists on the effect of measuring magnetic properties
values by first inducing IRM before ARM. This study explored the effect of
measuring concentration related
parameters (χlf, χfd and χARM), a mineral related parameter (S-300)
and grain size parameters (χfd% and χARM/SIRM ratio) fromwater samples by
starting with IRM before ARM. Forty three surface water samples were collected
from the estuarine of Yangtze River (China) with the aim of measuring magnetic
characteristics by starting with IRM before ARM. The results indicated that, measuring
magnetic properties by either starting with ARM or IRM led to similar values
for χlf, χfd, χfd%, χARM, S-300 and
χARM/SIRM ratio (p > 0.05). These results imply that, measuring concentrationrelated parameters does
not necessarily require measuring ARM first and then IRM. Researchers can start
by measuring any parameter between ARM and IRM without affecting the final
results of the water samples, but with proper demagnetization when started with
IRM.