20.500.12556/DiRROS-16016-940fd926-4943-1bcb-6a48-da7213c8e37b Statistical approach to interpretation of geochemical data of stream sediment in Pleše mining area Statistični pristop k interpretaciji geokemičnih podatkov potočnega sedimenta na območju rudišča Pleše The Ba, Pb and Zn ore deposit Pleše near Ljubljana is one of the formerly productive mines. The stream sediments were sampled and analysed by XRF to establish the effect of grain size, mineralization, and downstream location of sampling sites on geochemical composition based on various statistical analyses. Statistical analyses of the geochemical data confirm the impact of mineralization. The parametric t-test, non-parametric Mann-Whitney test and cluster analysis showed only minor differences in the geochemical composition of the samples with different grain sizes (< 0.063 mm and 0.063-2 mm). The parametric and non-parametric correlation coefficients as well as cluster analysis indicate that the contents of Si, Al, K, Rb, and Fe are associated with weathered rock forming minerals such as micas, and clay minerals, whereas Nb and Zr are associated with minerals resistant to weathering. Ca and Mg are associated with carbonates. S, Ba, Sr, Pb, Zn, and Mn indicate local mineralization with sulphates and sulphides. The results of the t-test and analysis of variance, Mann-Whitney tests and Kruskal-Wallis ANOVA of the groups established by the cluster analysis confirm that the contents of Ba, Pb and Sr have a statistically significant influence on the classification of the cluster group - i.e., the influence of sediment mineralization. There are no differences in elemental contents in the sediment samples downstream. The statistical approach to evaluate the geochemical data has proven useful and provides a good basis for further interpretation. V rudišču Pleše v okolici Ljubljane so v preteklosti pridobivali Ba, Pb in podrejeno Zn. Vpliv velikosti zrn, mineralizacije in lokacije vzorčevanih točk dolvodno na geokemično sestavo sem določala v vzorcih potočnega sedimenta, katerega geokemična sestava je bila določena z metodo XRF. Statistična analiza podatkov geokemične sestave je potrdila mineralizacijo vzorcev potočnega sedimenta. Rezultati parametričnega t-testa, neparametičnega Mann-Whitney-jevega testa in clustrske analize so pokazali, da se geokemični sestavi vzorcev frakcij <0,063 mm in 0,063-2 mm skoraj ne razlikujeta. Tako parametrični kot neparametrični korelacijski koeficienti ter clustrska analiza so pokazali, da prvine Si, Al, K, Rb in Fe kažejo na prisotnost preperelih kamninotvornih mineralov (npr. sljud, glinenih mineralov), Nb in Zr na minerale odporne na preperevanje, Ca in Mg sta značilna za karbonate. S, Ba, Sr, Pb, Zn in Mn kažejo na lokalno mineralizacijo s sulfati in sulfidi. Razlike med skupinami, ugotovljenimi s clustrsko analizo, sem testirala s parametričnim t-testom, analizo variance in Mann-Whitney-jevim testom ter Kruskall-Wallis ANOVO. Na uvrstitev v skupine nabolj vplivajo vsebnosti Ba, Pb in Sr, kar potrjuje vpliv mineralizacije sedimenta. Razlik v geokemični sestavi vzorcev sedimentov dolvodno testi niso zaznali. Statistični pristop k interpretaciji geokemičnih podatkov predstavlja dobro osnovo za nadaljnjo interpretacijo. ANOVA t-test correlation cluster analysis XRF mineralization ANOVA t-test korelacija clustrska analiza XRF mineralizacija true false true Geološki zavod Slovenije Angleški jezik Slovenski jezik Neznano 2023-01-06 03:34:59 2023-01-18 09:55:59 2023-02-18 03:34:42 0000-00-00 00:00:00 2022 0 0 str. 225-235 no. 2 vol. 65 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-12-21 504.5 0016-7789 10.5474/geologija.2022.013 135905283 1845-Article_Text-12342422-1-10-20221221.pdf 1845-Article_Text-12342422-1-10-20221221.pdf 1 99FD68D3F5EF1BBB3298410C9483E0F5 c086ffe0b4874293d349788a76f04afd5d62cbb8c18911c2e4693d84a6d7c78f 9f435fe5-970e-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21382 https://www.geologija-revija.si/index.php/geologija/article/view/1845/1910 0 6a051bd0-970e-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21381 Geološki zavod Slovenije Geologija 0 0 0