Pregled bibliografske jedinice broj: 87541
Distribution of rare earth elements and clay mineralogy in two different types of soil situated on Lower Cretaceous limestones in Istria, Croatia
Distribution of rare earth elements and clay mineralogy in two different types of soil situated on Lower Cretaceous limestones in Istria, Croatia // Abstracts / Dominguez, Eduardo (ur.).
Bahia Blanca: Universidad nacional del sur, 2001. (poster, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 87541 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Distribution of rare earth elements and clay mineralogy in two different types of soil situated on Lower Cretaceous limestones in Istria, Croatia
Autori
Durn, Goran ; Ottner, Franz ; Fröschl, Heinz ; Marchig, Vera
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Abstracts
/ Dominguez, Eduardo - Bahia Blanca : Universidad nacional del sur, 2001
Skup
The 12th International Clay Conference "2001 a Clay Odyssey"
Mjesto i datum
Bahía Blanca, Argentina, 22.07.2001. - 28.07.2001
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
soil; REE; terra rossa; waterlogged paleosol; clay mineralogy
Sažetak
Distribution of REE and clay mineralogy were studied in two different types of soils situated on Lower Cretaceous limestones in Istria. Sampling was performed along three profiles of terra rossa, polygenetic red soil (5YR to 10R in Munsell Hue) of Quaternary age and one profile of grey waterlogged paleosol (5BG to 10BG in Munsell Hue) of Early Cretaceous age. Dominant mineral phases in the clay fraction of terra rossa are kaolinites, illitic material, Fe-oxides and XRD amorphous inorganic compounds. Illitic material, regularly and randomly oriented illite/smectite mixed layer minerals are dominant mineral phases in the clay fraction of grey waterlogged paleosol. The total REE content ranges from 104.09 to 394.95 ppm in terra rossa and from 87.80 to 123.56 ppm in grey waterlogged paleosol. (La/Yb)ch ratios in terra rossa ranges from 8.5 to 13.18. and are higher than that of ES indicating LREE enrichment relative to HREE. On the contrary, (La/Yb)ch ratios in grey waterlogged paleosol ranges from 4.51 to 6.82 and are significantly lower than that of ES indicating HREE enrichment relative to LREE. The difference in total REE in analysed terra rossa can be attributed to the REE content in external rocks which have contributed in genesis of terra rossa, modified by weathering processes which characterise specific pedoenvironment in which terra rossa is formed. pH seems to be a key factor in controling the fate of the REE in grey waterlogged paleosol.
Izvorni jezik
Engleski
Znanstvena područja
Geologija
POVEZANOST RADA
