The elemental composition in peatland samples has been measured using the XRF (X-Ray Fluorescence) instrument. Peat soil samples were taken using a peat core near the Lake Diatas Alahan Panjang. After the magnetic suceptibilty of the samples were measured using Bartington Magnetic Susceptibility with MS2C sensor the samples that had the highest value were subsequently selected for analysis of elemental composition. The given results of percentage of major composition, including Si (50,552%), Al (13,545%), Fe (12,23%), S (4,896%) and Mg (4,204%). The most magnetic element forming magnetic element was Fe that formed mineral such on hematite, magnetite, maghemite, ilmenite, greidite or geothite.
Peatlands are formed from the accumulation of organic matter that originate from weathering vegetation for a long time. Minerals within peatlands can come from volcanic ash and consist of several types of minerals, one of which is magnetic minerals. This research aims to look the morphology, elemental composition and type of magnetic minerals found in the Lake Diatas peatland in Solok Regency, Indonesia because magnetic minerals have different morphologies depending on the source. The selected samples were from core DD REP B 693, which had a high magnetic susceptibility value. The magnetic minerals in the peatland were imaged and identified using Scanning Electron Microscope (SEM), which was equipped with Energy Dispersive Spectrometer (EDS). The results of morphological analysis showed that peatland had oval-shaped minerals with fractures and are multidomainal. The Back Scattered Electron (BSE) images show that the minerals have a bright colored surface that indicates the presence of a high amount of Fe. The EDS results showed that magnetic minerals from the peatland predominately contain the elements Fe, Ti, Si, and O. Based on the relative proportions of these elements, the magnetic minerals that can be formed in peatland are Magnetite (Fe304) and Ilminite (FeTiO3)
The rocks on the surface of the earth have different formation process, beginning with the lava of volcanic activity that flow on the surface of the earth and then cool down forming igneous rocks. Rocks derived by volcanic eruptions contain different types of minerals than those formed by sedimentary or metamorphic processes. The aim of study was to evaluate the relation of magnetic susceptibility with the elemental composition of rock and soil around the Danau Diatas. Magnetic susceptibility was measured using Bartington susceptibility meter MS2B and the element composition has been measured by X-Ray Fluorescence. The values of magnetic susceptibility of low frequency (χlf) obtained for rock are 2332×10−8 m3/Kg, 2161,7×10−8 m3/Kg, and 2791,6×10−8 m3/Kg, while the values of magnetic susceptibility of low frequency (χlf) obtained for soils are 802,4×10−8 m3/Kg, 779,8×10−8 m3/Kg, and 58,4×10−8 m3/Kg. Rock and soil samples contain several elements such as Fe, Mn and Ti, with Fe having the highest concentration and thus the highest potential influence on their magnetic susceptibility.
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