Mineralogical analysis of fine fraction in the gravels from the Drava river : bachelor's thesis

Šljunčara Hrastovljan nalazi se nedaleko od rijeke Drave na prijelazu između prve i druge dravske terase. Analizirana su četiri uzorka od kojih su dva uzorka materijal iz taložnice, a druga dva su materijal iz ispusta ocjednog sita s plovnog bagera. Analiza je provedena na originalnim uzorcima i na uzorcima separiranim Frantzovim magnetnim separatorom. Minerali su određeni pomoću stereoskopske lupe i XRD metodom. U originalnim uzorcima glavni minerali su kvarc, magnetit, 10Å minerali, kloriti, K-feldspati i plagioklasi. Sporedni minerali su kalcit, amfibol i dolomit. Analizom nisu pronađeni granat i zlato koji su pronađeni u dosadašnjim istraživanjima na prvoj dravskoj terasi.The Hrastovljan gravel pit is located near the Drava River between the first and second Drava terraces. Four samples were obtained, two were material from the settling tank, and the other two were drained leftover material from the dredger. The analysis was performed on the original samples and on the samples separated by the Frantz separator. Minerals were determined using a stereoscopic magnifying glass and the XRD method. In the original samples the main minerals are quartz, magnetite, 10Å minerals, chlorites, K-feldspar and plagioclase. Secondary minerals are calcite, amphibole and dolomite. The analysis did not confirmed presence of garnet and gold, which were found in previous research on the first Drava terrace