Statistical Interpretation of the Relation Between ICP-OES/MS Geochemical and Mineralogical Data Obtained From Lake and Floodplain Sediments (Amuq Valley / SE Turkey)

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Devin Aykasim MSc Thesis.pdf

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2022-2-3

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Aykasım, Devin

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In the Amuq Valley region, mineralogical and elemental geochemical investigations were carried out along the undisturbed core samples that were taken from the Amuq Lake and from the vicinity of the mounds within this region. Mineralogical content of the sediments along these cores were examined by X-Ray Diffraction (XRD) and Scanning Electron Microscope – Energy Dispersive X-Ray Spectroscopy (SEM-EDS). Inductively Coupled Plasma – Optical Emission Spectrometry / Mass Spectrometry (ICP-OES/MS) analyses were conducted on the samples to detect quantitative concentrations of major, minor and trace elements. A method was developed by MapInfo software to convert intensities of bulk powder and oriented air-dried clay fraction X-ray diffractogram peaks to numerical values. Numerical values obtained from XRD and ICP-OES/MS analyses were correlated by Correlation Matrix and Principal Component Analysis (PCA). Hence, advantages and disadvantages of this method was determined, and mineral-element relationships were statistically identified. Statistical evaluation of the data revealed that quartz, serpentine, feldspars and clay minerals have higher correlation coefficients in the floodplain samples while calcite and aragonite have higher correlation coefficients in the lake samples. A significant effect of environmental difference was determined on aragonite correlations. It was also examined that the clay mineral peaks before 20° 2θ on bulk powder X-ray diffractograms exhibit different mineralogical and elemental relationship in contrast to the other clay mineral peaks. Moreover, element vs. mineral correlations revealed possible presence of impurities like rutile in quartz while other minerals generally correlate with their chemical constituents except clay minerals which also correlate with rare earth elements.

Subject Keywords

Amuq Valley, Lake and Floodplain Sediments, Mineralogical and Geochemical Data, Statistical Evaluation

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https://hdl.handle.net/11511/96306

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

D. Aykasım, “Statistical Interpretation of the Relation Between ICP-OES/MS Geochemical and Mineralogical Data Obtained From Lake and Floodplain Sediments (Amuq Valley / SE Turkey),” M.S. - Master of Science, Middle East Technical University, 2022.