This paper presents a comparison between persistent scatterer interferometry (PSI) monitoring results and the in situ displacement measurements. The landslide occurred after heavy rain event in November 1990. The material on the deposit is Boršt hydrometallurgical waste from the extraction process of the ammonium diuranate (yellowcake) from uranium ore, excavated at adjacent uranium mine Žirovski vrh. Although the landslide did not directly endanger people, site remediation works were undertaken due to the possible subsequent environmental problems. PSI campaigning in the ŠkofjeloškoCerkljansko area, where the mining waste from the uranium ore mill is situated also detected displacements, most probably indicating a creeping process. The high correlation values between the movements of the benchmarks and the PSs confirm that the remediation works were effective as the fluctuations in the displacement values of the landslide were very similar to those of the PSs. Nevertheless, although there are several limitations in comparing the two different datasets, the PSI technique can be complementary to conventional in situ methods, mainly in areas where long term monitoring is required.
COBISS.SI-ID: 2234197
The paper presents a study of a new Slovenian meteorite Jezersko, which was found near Češka koča cottage over Jezersko. Analyses showed that the meteorite Jezersko is mainly composed of olivine and piroxenes (enstatite, diopside) with low iron content and homogeneous composition, and plagioclases, which form chondrules and matrix. Besides main silicate minerals, kamacite, taenite, troilite, chromite, chlorapatite and merrillite are also common. Pentlandite, cobalt pentlandite and molybdenite, which were described for the first time in meteorite Jezersko as a primary mineral in ordinary chondrites, occur as rare accessory minerals. The chemical composition of mineral pairs (geothermometers) showed that after its formation the meteorite was exposed to temperatures up to 854°C with rapid cooling to 700°C, followed by slow cooling down to 450°C. According to petrological, mineral and chemical composition, the meteorite Jezersko was classified as H4 S2(3) chondrite, partially equilibrated stony meteorite with a high content of iron minerals that has experienced weak shock metamorphosis.
COBISS.SI-ID: 1153374
In order to detect recently tectonically active faults, Stream Length-gradient (SL) index and a newly developed method of river gradient analysis were made for three rivers. Two methods were used on the southern part of Ljubljana moor, where rivers cross dextral (right-lateral) faults with Dinaric orientation (NW-SE). Watercourse profiles were analyzed first, using a "classic", well established method of SL index. However, this method didn't yield useful results since almost no variability in SL indexes were observed. Additionally, a second newly developed method pointed on the anomalies, which might correspond to the areas of active surface uplift and subsidence as a consequence of active tectonic movements. We compared determined anomalies with the fault lines plotted on the Basic geological map 1:100.000 and with the data of radar measurements of vertical movements by PSInSAR method. In such way five potentially active faults, areas of contraction and areas of extension were determined. The results of this research can be used as complementary information for the construction of tectonic model of Ljubljana field and Ljubljana moor.
COBISS.SI-ID: 2167125
A composite sample of coal cuttings (depth: 141.0–155.5 m) from the TER-1/03 water supply well in north-eastern (NE) Slovenia (Slovenske gorice; locality Terbegovci – Sveti Jurij ob Ščavnici) was analysed for its coal quality (proximate analysis – percent moisture, volatile matter, fixed carbon, ash), calorific value, and major (C, H, O, N, S)-, minor (Si, Al, Fe, Mg, Ca, Na, K, Ti, P, Mn – as oxides)- and trace-elemental (43 elements) chemical composition. The coal was classified as a “normal” humic, high-grade metalignite, similar to coals in the Mura Formation of the Mura-Zala Basin. Unusually high arsenic (As) content of more than 100 µg/g was determined in the investigated coal matter, whereas the Clarke value for the world coals is between 5 and 10 µg/g, as cited by different authors. Besides As, also Sb, V, Mo, U, and W have been found to be enriched in the studied coal. Arsenic content in the TER-1/03 coal resembles the “Dacota type coal” significant for high As content where As was sorbed epigenetically by lignite from low-temperature groundwaters. At present time, increased As contents were not detected in underground waters of the wider TER-1/03 area.
COBISS.SI-ID: 2294869
Study deals with dusty material in rainfall residue, deposited and collected on February 19th 2014 in Ljubljana, which was analyzed with SEM/EDS in order to assess its origin. The analysis showed that the material consisted of poorly sorted and sharp-edged particles of very finegrained silt and clay fractions, consistent with long-range aerial transport, represented by illite, chlorite and kaolinite group clay minerals, quartz, feldspars, carbonates, accessory minerals and secondary Fe-oxyhydroxide minerals. Quantities and ratios between different clay minerals indicated that the dusty material originated from Morocco and northern Mauritania and only partly also from central Niger, southern Algeria, southwestern and central Libya.
COBISS.SI-ID: 2294613