Oleh:
Zaturrahmi
2011/1104034
Abstract
The investigation of magnetic mineral types of rubber and
oil palm plantation land in the area Rimbo Bujang Tebo regency in Jambi never
been done before using the measurements of isothermal saturation curve Remanent
Magnetization (IRM). This IRM saturation
curves can only identify the type of magnetic minerals
in the form of magnetite and hematite. As for
identifying other types of magnetic minerals
can be used the
method of X-Ray
Diffraction (XRD) as a method of nonmagnetic.
This study aims to
investigate the type of magnetic minerals contained
in the soil fertile
and less fertile plantations
of rubber and palm
area Bujang Rimbo
Tebo regency in
Jambi-use X-Ray Diffractometer.
The sample for this
study were drawn at six points from three
locations, namely locations
lush rubber plantations as much as two samples, lush palm plantation
sites as much as two
samples of oil palm plantations and locations of
the two samples is
less fertile. The method used was method nonmagnetic
X-Ray Diffraction (XRD). From the results of x-ray diffraction data obtained
for each sample in
the form of diffraction angle
(2), the distance between the field (d) and
relative intensities are then matched with a database of mineral International Centre for Diffraction Data
(ICDD) so as to identify
the type of magnetic minerals contained in the
soil samples.
Results of analysis using XRD showed that the magnetic minerals
contained in a rubber plantation soil fertile
area Bujang Rimbo
Tebo regency in
Jambi comes from iron oxide group. The
dominant type of magnetic minerals are magnetite,
hematite minerals as are found in a
size that is not so dominant. Terkadung nonmagnetic
minerals in soil samples lush rubber plantations
are cronstedtite, hastingsite, grossular, 1-A kaolinite and
quartz. This type of
magnetic minerals were identified in soil samples is dominated by lush palm
plantations hematite, because the only type of hematite were identified. While
the non-magnetic minerals is cronstedtite, clinoclore, hastingsite, grossular,
and calcite. Samples of oil palm estates less fertile land is dominated by the
magnetic mineral magnetite, while also discovered magnetic minerals hematite
and contained cronstedtite, hastingsite, calcite and quartz as the mineral
nonmagnetic.
Keyword: mineral magnetic, mineral nonmagnetic, XRD,soil.
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Irfan Dani, S. Pd.Gr