Geologija最新文献

{"title":"Provenance and morphostratigraphy of the PlioceneQuaternary sediments in the Celje and Drava-Ptuj Basins (eastern Slovenia)","authors":"Eva Mencin Gale, P. Rupnik, M. Trajanova, L. Gale, M. Bavec, F. Anselmetti, A. Šmuc","doi":"10.5474/geologija.2019.009","DOIUrl":"https://doi.org/10.5474/geologija.2019.009","url":null,"abstract":"","PeriodicalId":12743,"journal":{"name":"Geologija","volume":"62 1","pages":"189-218"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49055018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triassic deep-water sedimentation in the Bled Basin, eastern Julian Alps, Slovenia","authors":"L. Gale, T. Kolar-Jurkovšek, Barbara Karničnik, B. Celarc, Š. Goričan, B. Rožič","doi":"10.5474/geologija.2019.007","DOIUrl":"https://doi.org/10.5474/geologija.2019.007","url":null,"abstract":"The Bled Basin was a Middle Triassic–Early Cretaceous basin whose remnants are preserved in the eastern Southern Alps in western Slovenia. The early evolution of the basin is recorded in the Upper Ladinian to Lower Jurassic Zatrnik cherty limestone formation, which in the Pokljuka Nappe overlies Middle Triassic volcanics, volcaniclastics and hemipelagic limestones. The Zatrnik Limestone is poorly documented and biostratigraphically not well constrained. The base of the Zatrnik Limestone was logged in four sections in the eastern part of the Pokljuka plateau. An Upper Ladinian Muelleritortis cochleata Radiolarian Zone was recognised in the lowermost part, whereas conodont data indicate Julian to latest Tuvalian/early Norian age for the rest of the logged sections. Microfacies analysis indicates hemipelagic deposition on a basin plain and/or distal slope, which is often interrupted by distal calciturbidites.","PeriodicalId":12743,"journal":{"name":"Geologija","volume":"62 1","pages":"153-173"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45348535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk assessment for open loop geothermal systems, in relation to groundwater chemical composition (Ljubljana pilot area, Slovenia)","authors":"Katja Koren, M. Janža","doi":"10.5474/geologija.2019.011","DOIUrl":"https://doi.org/10.5474/geologija.2019.011","url":null,"abstract":"Shallow geothermal energy is a renewable source of energy that can be used effectively with open loop geothermal systems. Knowledge of hydrogeological conditions is a prerequisite for the successful implementation and operation of such systems. The article describes a risk assessment of open loop geothermal system operation related to the chemical composition of groundwater in the area of the City of Ljubljana. Results of the study show that in the area of the Ljubljansko polje aquifer, the geochemical characteristics of the groundwater do not represent a risk of possible operational problems for an open loop geothermal system. On the contrary, the chemical composition of the groundwater in the Ljubljansko barje aquifer indicates a risk of corrosion and/or the precipitation of minerals, which can lead to diminished efficiency of the geothermal system or even damage that can result in the interruption of operations. In order to avoid operational problems in open loop systems, wells must be a professionally designed and installed, and groundwater geochemical characteristics properly determined. In the latter, it is important to take into account the method of sampling, since the chemical composition of water in the aquifer and in the geothermal system may vary significantly.","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44034412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of achieving sustainable goals from the groundwater management and protection perspective in Slovenia","authors":"J. Uhan, M. Andjelov","doi":"10.5474/geologija.2019.013","DOIUrl":"https://doi.org/10.5474/geologija.2019.013","url":null,"abstract":"Achieving the sustainable goals for management and protection of groundwater resources in shallow aquifers in Slovenia was evaluated with stress indicators for the alluvial aquifers of groundwater bodies with the highest quantitative and qualitative pressures: Savska kotlina with Ljubljansko Barje, Savinjska kotlina, Krška kotlina, Dravska kotlina and Murska kotlina. We have deepened the approach taken so far to assess the status of groundwater in Slovenia as defined by the Water Framework Directive for the area of individual bodies of water. The level of groundwater exploitation is markedly higher in some of the most polluted parts of shallow groundwater bodies than has been estimated so far in whole groundwater bodies. In some cases, such as Ljubljansko polje aquifer, the groundwater withdrawals in mid-low-water conditions are already approaching half of all available groundwater resources. In some alluvial aquifers of groundwater bodies, such as Krška, Dravska and Murska kotlina, the level of groundwater nitrate pollution in dry years has already exceeded the limit for the sustainable protection of groundwater resources. GEOLOGIJA 62/2, 267-278, Ljubljana 2019 https://doi.org/10.5474/geologija.2019.013","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45784782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Statistical analysis of groundwater drouht on Dravsko-Ptujsko polje","authors":"Simona Adrinek, M. Brenčič","doi":"10.5474/geologija.2019.012","DOIUrl":"https://doi.org/10.5474/geologija.2019.012","url":null,"abstract":"Drought is a complex phenomenon and can be defined in many ways. It is a globally growing problem that occurs on a time scale ranging from months to years. There are several types of drought, but the least investigated is groundwater drought. Globally, research on it started relatively recently, in the last decade. In Slovenia, there are almost no data on groundwater drought. In this research, we focused on statistical analysis of groundwater level diagrams of individual groundwater stations, which can determine periods of groundwater drought. The first method used is based on ranking statistics defined by lower percentiles that indicate low groundwater level. Another approach was based on univariant Standardized Groundwater Index – SGI. As a case study, the unconfined Quaternary aquifer of Dravsko-Ptujsko polje was chosen. The results show that the groundwater deficits in the groundwater stations appear simultaneously but differ in intensity and duration of each drought period. The important conclusion is that the intensity of groundwater drought does not depend on the length of an event but more on thickness of the unsaturated aquifer","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48032965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of seismological investigations related to 1998 Mw5.6 and 2004 Mw5.2 earthquakes in Krn Mountains","authors":"A. Gosar","doi":"10.5474/GEOLOGIJA.2019.003","DOIUrl":"https://doi.org/10.5474/GEOLOGIJA.2019.003","url":null,"abstract":"Overview of extensive seismological studies of Krn Mountains earthquakes performed in two decades is given. Detailed macroseismic studies by using a new European Macroseismic Scale EMS-98 showed large variations in damage to buildings due to the influence of very heterogeneous sediments and partly also due to the differences in source radiation pattern. Site effects were carefully studied and it was proven by microtremor HVSR method that soil-structure resonance effects severely enhanced the damage in many places. Particularly important were seismotectonic studies based mainly on focal mechanisms and distribution of aftershocks. Combined with geological data these studies pointed to the complex structure of segmented Ravne fault, which is growing by interactions between individual fault segments. A wider area is characterised by a kinematic transition between Dinaric (NW-SE) strike-slip faults in W Slovenia and E-W trending Alpine structures with predominantly reverse faulting in Friuli. Other investigations included static stress changes on neighbouring faults, analyses of the time decay of extensive aftershock sequences and magnitude-frequency relations. All these studies have significantly fostered seismological research in Slovenia and have enhanced international cooperation. Following the 1998 earthquake a modern national seismological network was built composed of 26 stations equipped with broadband sensors, accelerometers and high-resolution digitizers. Together with cross-border exchange of real-time data the seismological monitoring has been significantly improved.","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44099858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aspects of the consequences of the extreme weather event","authors":"M. Novak, I. Mrak","doi":"10.5474/GEOLOGIJA.2019.006","DOIUrl":"https://doi.org/10.5474/GEOLOGIJA.2019.006","url":null,"abstract":"All protected areas of natural values which are populated are faced with the problem of maintaining a balance between preserving the natural environment and human interventions in it for its economic activities and its security. The extreme weather event in the night from 29th to 30th October 2018 caused major changes in the Tržiška Bistrica river basin, which are most evident in the Dovžan Gorge Natural Monument. The event highlighted several aspects of this issue. Through the analysis of this weather event, changes in the surface from photo documentation and historical archives, the Dovžan Gorge Natural Monument has proven to be an excellent polygon for the study of natural processes, anthropogenic influences and the human perception of natural disasters and historical memory of them. GEOLOGIJA 62/1, 123-135, Ljubljana 2019 https://doi.org/10.5474/geologija.2019.006","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45364008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uvodnik","authors":"Miloš Bavec","doi":"10.5474/geologija.2019.000","DOIUrl":"https://doi.org/10.5474/geologija.2019.000","url":null,"abstract":"","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47731291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examples of the assessment of temperatures on the surface of solid ground in the design of the shallow geothermal energy extractions","authors":"D. Rajver, S. Pestotnik, J. Prestor","doi":"10.5474/GEOLOGIJA.2019.005","DOIUrl":"https://doi.org/10.5474/GEOLOGIJA.2019.005","url":null,"abstract":"The thermal conductivity of rocks and soils and the mean annual temperature of the ground have the biggest impact on the dimensioning of the extraction of geothermal energy with closed ground-water systems. The method of determining the ground temperature is presented in four ways according to the available data at a given location: 1) we have data on the mean annual air temperature, 2) we only have information about the altitude of the place, 3) nearby is a meteorological station with soil (ground) temperature measurements, and 4) a borehole with a thermogram is in the vicinity. The use of these four methods and the differences between them are illustrated by five examples in different parts of Slovenia (Cerkno, Lucija, Brnik, Babno Polje and Maribor). It has been shown that the ground temperature measured at meteorological stations is on average higher than the temperature calculated from the borehole thermograms. The ground temperature can be well estimated with a regression line between the altitude and the measured ground temperatures at meteorological stations only for the continental part. In the coastal part of Slovenia, such an assessment was not feasible, as only two stations with ground temperature measurements are available. There are significantly more boreholes with thermograms (as much as 458) than meteorological stations with measurements of ground temperature (only 9). For this reason, the use of borehole thermograms makes sense. In addition, the borehole thermograms allow us to calculate the heat-flow density, which is also needed in the dimensioning of geothermal energy extractions. For more GEOLOGIJA 62/1, 103-122, Ljubljana 2019 https://doi.org/10.5474/geologija.2019.005 104 Dušan RAJVER, Simona PESTOTNIK & Joerg PRESTOR comparable assessment of the ground temperature from the thermograms, several thermograms from the recent period 1981-2010 should be available, because this period already contains the effect of global warming of the atmosphere. Since this was not the case, we obtained at all locations according to the method of calculation the lowest value from the thermograms. On the other hand, in most boreholes, the temperature record in the upper 20 m is missing, so in the correct extrapolation of the T-z profile from the deeper section of the profile, we mainly covered sections between 20 and 100 m depth. With this we captured such a course of the T-z profile, which still contains in itself a memory of usually slightly lower temperatures on the surface in the past.","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49204263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LicenseCalpionellid biostratigraphy and sedimentation of the Biancone limestone from the Rudnica Anticline (Sava Folds, eastern Slovenia)","authors":"D. Reháková, B. Rožič","doi":"10.5474/GEOLOGIJA.2019.004","DOIUrl":"https://doi.org/10.5474/GEOLOGIJA.2019.004","url":null,"abstract":"Mt Rudnica in eastern Slovenia structurally belongs to the Sava Folds. The mountain itself is an exposure of the Mesozoic core of the Rudnica Anticline. The major part of the core is composed of Triassic rocks deposited on the NE margin of the Dinaric (Adriatic) Carbonate Platform, overlain locally by deep-marine Berriasian Biancone limestone. The latter formation was logged in a newly discovered section on the northern slopes of Mt Rudnica near the village of Loka pri Žusmu. The Biancone limestone of Mt Rudnica is mostly monotonous, calpionellid-bearing limestone with only minor up-section differences in colour, chert presence, and clay content. It is characteristic pelagic facies for the entire Tethyan Realm of the time. Using calpionellid as well as dinocyst biostratigraphy, the formation was subdivided into Early Berriasian Calpionella Zone - Alpina and Ferasini Subzones, Middle Berriasian Calpionella Zone - Elliptica Subzone and upper Berriasian Calpionellopsis Zone - Oblonga Subzone. Within the Early Berriasian part of the formation a synsedimentary slump was documented, whereas the largest increase in clay content is observed in the topmost, i.e. Late Berriasian part of the formation.","PeriodicalId":12743,"journal":{"name":"Geologija","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49185387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}