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Mineraloška, petrološka in geokemična karakterizacija talninskih plasti velenjskega lignitnega sloja = mineralogical, petrological and geochemical characterization of the foot-wall sediments of the Velenje lignite seam : diplomsko deloČeru, TejaCilj diplomske naloge je bil proučiti mineralno, petroioško in geokemično sestavo talninskih sedimentov velenjskega lignitnega sloja. V ta namen je bilov raziskavo vključenih 32 vzorcev iz jedra ... vrtine P-9k/92 na katerih so bile opravljene naslednje preiskave: suha sejalna analiza, sejalna analiza z laserskim merilcem zrnavosti, optična mikroskopija v presevni svetlobi, rentgenska praškovna difrakcija in geokemijska analiza. Rezultati analiz so pokazali, da talninske plasti predstavljajo zelo heterogeni in hitro menjavajoči se sedimenti, ki so nastali v relativno mirnem sladkovodnem okolju, kjer so vladale redukcijske razmere. V proučevanem profilu prevladujejo melji in premoško bogati vzorci, med katerimi izstopajo peščenjaki in brečo-konglomerati. Debeleje zrnati sedimenti so odraz intenzivnejših dogodkov ter povečanega doprinosa terigenega materiala, ki so ga vodotoki s severa prinašali v sedimentacijski bazen. Pojavljajo se tudi sideritni vložki in debelozrnati sedimenti bogati s sideritom. Z izračunano Ce anomalijo smo ugotovili, da so ti sedimenti nastali v nekoliko bolj oksidacijskih pogojih. Geokemijska analiza je pokazala, da v vzorcih prevladujejo naslednji oksidi glavnih prvin: SiO2, AI2O3, Fe2O3, K2O, CaO, in Na2O. Vzorci se med seboj razlikujejo le v količini in razmerju med glavnimi oksidi. Meljevce tako pretežno sestavljajo kremen ter kaolinit in illit/muskovit. V debelozrnatih sedimentih je količina glinenih mineralov znatno nižja, ti pa poleg omenjene sestave vsebujejo še glinence. Kot vezivo se v dobro litificiranih peščenjakih pojavlja markazitni, kalcitni in sideritni cement. Korelacije med glavnimi oksidi in redkimi zemljami so pokazale, da je vsebnost lahkih redkih zemelj vezana na alumosilikate, vsebnost težkih redkih zemelj pa na karbonatni del, pretežno na siderit.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [T. Čeru], 2013Language - slovenianCOBISS.SI-ID - 1086558
Author
Čeru, Teja
Other authors
Dolenec, Matej, 1974- |
Markič, Miloš
Topics
mineralogija |
petrologija |
geokemija |
talninske plasti |
lignitni sloji |
premogovnik Velenje
Library/institution |
City | Acronym | For loan | Other holdings |
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NTF, Department of Geology, Ljubljana | Ljubljana | NTFGEO |
outside loan 1 cop.
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Čeru, Teja | 37528 |
Dolenec, Matej, 1974- | 21372 |
Markič, Miloš | 08255 |
Source: Personal bibliographies
and: SICRIS
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