magistrsko delo
Gašper Miha Volk (Avtor), Nina Zupančič (Mentor), Helena Grčman (Komentor)

Povzetek

V magistrski nalogi smo preučili mineralne, geokemične in pedološke lastnosti tal Brkinskega flišnega bazena z namenom primerjave lastnosti tal, nastalih na peščenjaku in meljevcu. Vzorčili smo na treh lokacijah, ki si sledijo od severozahoda proti jugovzhodu in odvzeli 15 vzorcev tal po horizontih in matično podlago. Izvedli smo standardne pedološke analize tal, pregledali zbruske kamnin pod presevnim polarizacijskim mikroskopom in določili mineralno sestavo z rentgensko praškovno difrakcijo. Kemijska analiza vsebnosti glavnih oksidov, slednih elementov in REE v vzorcih kamnin in tal je bila izvedena z emisijsko (ICP-ES) in masno (ICP-MS) spektroskopijo. Ugotovili smo, da so na peščenjakoma razvita distrična rjava tla ter na meljevcu distrični ranker. Vsa tla so teksturno srednje do težka, z različno teksturo. V vseh profilih prevladuje SiO2, ki mu sledita Al2O3 in Fe2O3. Prevladujoči minerali v vseh treh profilih so kremen, plagioklazi, muskovit/illit in minerali kloritove skupine. Primerjava vseh treh talnih profilov s Kruskall-Wallisovo analizo variance je pokazala razlike v vsebnosti finega melja, pH-ju, koncentraciji Ca, Mg in Na kationov ter vsoti in nasičenosti z bazičnimi kationi. Profili se med seboj razlikujejo v vsebnosti Al2O3, Fe2O3, MgO, CaO, K2O, MnO, Ba, Cu, Ga, Ni, Rb, Zn, Zr, V, Sc, Hf in večine REE. V primerjavi s peščenjakoma in tlemi, razvitimi na njiju, meljevec in tla na njem, vsebujeta večjo vsebnost vseh glavnih oksidov, razen SiO2 in Na2O ter vseh slednih elementov in REE, razen Cr, Zr in Pb. Razlika med profili je tudi v intenziteti difrakcijskih uklonov. Primerjava tal na peščenjakih z Mann-Whitneyjevim testom je pokazala pedološke razlike v istih parametrih kot primerjava vseh treh profilov. Peščenjaka in tla na njiju se statistično značilno ločijo po vsebnosti CaO in MnO. Primerjava s tlemi, razvitimi na podobni litološki podlagi, a različnega nastanka in starosti, je pokazala, da se kljub podobni litološki podlagi lastnosti tal razlikujejo.

Ključne besede

pedološka sestava tal;geokemična sestava tal;mineraloška sestava tal;fliš;Brkini;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.09 - Magistrsko delo
Organizacija: UL NTF - Naravoslovnotehniška fakulteta
Založnik: [G. M. Volk]
UDK: 55
COBISS: 232270339 Povezava se bo odprla v novem oknu
Št. ogledov: 113
Št. prenosov: 31
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: pedologic, mineral and geochemical properties of Brkin flysch basin soils
Sekundarni povzetek: In this master's thesis, we investigated the mineralogical, geochemical, and pedological characteristics of soils in the Brkini Flysch Basin to compare the properties of soils developed on sandstone and siltstone. Soil samples were collected at three sites along a northwest-to-southeast transect, with a total of 15 samples taken from various soil horizons and the parent material. We conducted standard pedological analyses, examined thin sections of rock samples under a transmitted polarized light microscope, and determined the mineral composition using X-ray powder diffraction (XRD). The chemical composition, including major oxides, trace elements, and rare earth elements (REEs) in both rock and soil samples, was analyzed using inductively coupled plasma emission spectroscopy (ICP-ES) and inductively coupled plasma mass spectrometry (ICP-MS). The study revealed that Dystric Cambisols (WRB) or Inceptisols (USDA) have developed on sandstone, while Dystric Leptosols (WRB) or Entisols (USDA) are present on siltstone. All soils are moderate to heavy in texture, with variable particle size distribution. In all profiles, SiO₂ is the dominant oxide, followed by Al₂O₃ and Fe₂O₃. The primary minerals identified in all three profiles include quartz, plagioclase, muscovite/illite, and chlorite-group minerals. Kruskal-Wallis variance analysis revealed significant differences in fine silt content, pH, Ca²⁺, Mg²⁺, and Na⁺ concentrations, as well as in the sum and saturation of base cations. The profiles also varied in their concentrations of Al₂O₃, Fe₂O₃, MgO, CaO, K₂O, MnO, and trace elements such as Ba, Cu, Ga, Ni, Rb, Zn, Zr, V, Sc, and Hf, along with most REEs. Compared to sandstone-derived soils, siltstone and its associated soils exhibited higher concentrations of all major oxides except for SiO₂ and Na₂O, as well as higher levels of trace elements and REEs, except for Cr, Zr, and Pb. Additionally, differences were observed in the intensity of XRD diffraction peaks and the relative proportions of mineral phases. A Mann-Whitney U test comparing sandstone-derived soils confirmed pedological differences in the same parameters as those identified in the broader three-profile comparison. Notably, CaO and MnO concentrations were statistically distinct in sandstone-derived soils. Comparisons with soils developed on similar lithological substrates of differing origins and ages indicate that, despite comparable parent materials, substantial variability exists in soil properties.
Sekundarne ključne besede: pedological properties;chemical composition;mineralogical characteristics;Brkini Flysch Basin;
Vrsta dela (COBISS): Magistrsko delo/naloga
Študijski program: 0
Komentar na gradivo: Univ. v Ljubljani, Naravoslovnotehniška fak., Oddelek za geologijo
Strani: XIX, 59 str., pril.
ID: 26125356