Geologia Croatica最新文献_第2页

Upper Miocene ostracods from the Krško Basin, SE Slovenia 斯洛文尼亚东南部Krško盆地中新世上部介形类

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2023-06-16 DOI: 10.4154/gc.2023.07

M. Marinšek, Valentina Hajek-Tadesse, M. Poljak, T. Kolar-Jurkovšek, L. Gale

引用次数: 0

Taxonomic revision of the Lake Pannon cockle subgenus Lymnocardium (Budmania) Brusina, 1897 潘农湖鸡亚属Lymnocardium（Budmania）Brusina的分类修订，1897

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2023-02-23 DOI: 10.4154/gc.2023.01

I. Magyar, L. Katona

引用次数: 0

Žune Ba-F epithermal deposit Part 2: Geophysical characterization and exploration perspective Žune Ba-F浅成热液矿床第二部分:地球物理表征与勘探前景

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2023-02-23 DOI: 10.4154/gc.2023.04

Jasna Orešković, Aleksej Miloševič, Saša Kolar, S. Šoštarić

{"title":"Žune Ba-F epithermal deposit Part 2: Geophysical characterization and exploration perspective","authors":"Jasna Orešković, Aleksej Miloševič, Saša Kolar, S. Šoštarić","doi":"10.4154/gc.2023.04","DOIUrl":"https://doi.org/10.4154/gc.2023.04","url":null,"abstract":"The Žune barite-fluorite ore body in northwestern Bosnia and Herzegovina has been explored in order to determine spatial distribution of the ore body. At the Žune site, barite mineralization occurs in the form of veins and is hosted by dolostone. A geophysical survey was carried out with the aim to detect anomalies associated with the barite-fluorite deposit and to characterize the abandoned old deposit. Therefore, 2D electrical resistivity tomography (ERT) was measured along four profiles. Prior to surface geophysical measurements, detailed geological field mapping of the ore body and host rocks was undertaken. The geometry of the abandoned mining cut with steep walls and complex structural setting with barite that incorporates coarse fragments of host rock and fluorite makes interpretation of the results challenging. The collected geological data were used to calibrate the geophysical models. Forward modelling in addition to inversion of the ERT data helped to reduce the ambiguity of geophysical data interpretation. The results revealed that the barite vein in the area of mining cut is limited to a depth of about 10 m and length is about 40 m. There is no indication for barite mineralization in the area south of the mining cut, while anomalies that may be associated with ore bodies are present in the northern and northeastern part.","PeriodicalId":55108,"journal":{"name":"Geologia Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70281559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sedimentological infill of the Middle Triassic half-graben below Mt. Vernar in Julian Alps, Slovenia 斯洛文尼亚朱利安阿尔卑斯山Vernar山下中三叠纪半地堑的沉积填充

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2023-02-23 DOI: 10.4154/gc.2023.03

L. Gale, Katarina Kadivec, M. Vrabec, B. Celarc

{"title":"Sedimentological infill of the Middle Triassic half-graben below Mt. Vernar in Julian Alps, Slovenia","authors":"L. Gale, Katarina Kadivec, M. Vrabec, B. Celarc","doi":"10.4154/gc.2023.03","DOIUrl":"https://doi.org/10.4154/gc.2023.03","url":null,"abstract":"Early beginnings of the Middle Triassic extension in the areas surrounding the western embayment of the Neotethys are evidenced in formation of small half-graben basins, local emergences of the underlying platform, and/or deposition of coarse-grained breccia. The succession related to the creation and infilling of one of these half-grabens is exposed on the slopes of the base of Mt. Vernar in eastern Julian Alps, Slovenia. The lowermost exposed unit within the half-graben is the Uggowitz Breccia, which attains thickness of up to 150 m. It is followed by a few tens of meters of red nodular limestone (the informal 'Vernar member'), followed by the second, thinner Uggowitz Breccia unit, succeeded by sandstone and sandy limestone (the informal “Krma member”), rich in shallow marine foraminifers and plant material. The basin-filling succession is followed by indistinctly bedded and then massive limestone of the Schlern Formation. Late Anisian (Ilyrian) age is assumed for the sediments of the half-graben based on the clast composition and comparison with regional sequence stratigraphic schemes. Breccias likely deposited in shallow marine or marginal marine setting. Individual beds are interpreted as subaqueous debris-flow deposits.","PeriodicalId":55108,"journal":{"name":"Geologia Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42040473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Petrochronological study of chloritoid schist from the Medvednica Mts. (Croatia, Zagorje Mid-Transdanubian zone) Medvednica Mts.(克罗地亚，Zagorje - transdanubian中游地区)绿绿片岩的岩石年代学研究

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2023-02-23 DOI: 10.4154/gc.2023.02

Ivan Mišur, D. Balen, U. Klötzli, M. Belak, H. Massonne, Mihovil Brlek, V. Brčić

{"title":"Petrochronological study of chloritoid schist from the Medvednica Mts. (Croatia, Zagorje Mid-Transdanubian zone)","authors":"Ivan Mišur, D. Balen, U. Klötzli, M. Belak, H. Massonne, Mihovil Brlek, V. Brčić","doi":"10.4154/gc.2023.02","DOIUrl":"https://doi.org/10.4154/gc.2023.02","url":null,"abstract":"A chloritoid schist from the Medvednica Mts. (Croatia, Zagorje-Mid-Transdanubian zone) is part of the metasedimentary succession of a Palaeozoic-Mesozoic Metamorphic Complex. The studied samples show the mineral association of chloritoid, chlorite, quartz and white mica. A P-T pseudosection, combined with modal and chemical isopleths, and classical thermobarometric calculations yield peak metamorphic conditions of 0.8 – 1.0 GPa at around 500 °C. Monazite in-situ dating with the electron microprobe results in an age of 156 ± 3 (2σ) Ma interpreted as dating monazite growth during prograde metamorphism. Laser ablation multicollector ICP mass spectrometry of U-Th-Pb isotope systematics in detrital zircon grains indicate a maximal deposition time of the sedimentary protolith in the Permian in accordance with published palaeontological records. The presented results are synchronous with the Late Jurassic obduction of a Neotethys-derived ophiolitic mélange onto a Permotriassic sedimentary sequence originated from the continental margin of Adria. This obduction caused regional collision metamorphism by thrusting Ophiolitic units (i.e. Neotethys) upon tectonic units of continental margin of Adria. Studied chloritoid schist is a part of the continental margin of Adria and is metamorphosed during collisional metamorphic event at upper greenschist-facies.","PeriodicalId":55108,"journal":{"name":"Geologia Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43166173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The calcareous nannofossil record of the uppermost Maastrichtian-lower Palaeocene in the Kırıkkale Basin, in the Central Anatolian Region (Turkey) 土耳其中部安纳托利亚地区Kırıkkale盆地上马斯特里赫特-下古新世钙质纳米化石记录

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2022-10-26 DOI: 10.4154/gc.2022.30

Caner Kaya Ozer, Yakup Kilic

{"title":"The calcareous nannofossil record of the uppermost Maastrichtian-lower Palaeocene in the Kırıkkale Basin, in the Central Anatolian Region (Turkey)","authors":"Caner Kaya Ozer, Yakup Kilic","doi":"10.4154/gc.2022.30","DOIUrl":"https://doi.org/10.4154/gc.2022.30","url":null,"abstract":"The Late Cretaceous–Early Paleogene (K–Pg) was a critical period of transition in geological time. This period encompassed short-term climatic fluctuations on a global scale, changes in ocean circulation, and sudden and large extinctions of marine and terrestrial organisms. In the study area, located in the mid to low latitudes, the Late Cretaceous and Early Paleogene were very tectonically active due to the positioning of the site close to the collision zone of two large continents. The impacts of the global K–Pg crisis can be observed in the study area. In this study, the calcareous nannofossil contents of late Maastrichtian–Danian sediments were studied, and the nannofossil biostratigraphy determined, from samples from the Samanlık and Dizilitaşlar Formations, deposited in the Kırıkkale Basin. From three stratigraphic sections, 26 nannofossil genera and 36 nannofossil species were identified from the Late Maastrichtian UC20aTP and UC20bTP biozones and the NP1 and NP2 biozones of the Danian. Additionally, it was determined that the K–Pg boundary was not continuous in the study area. In the Kırıkkale Basin, relatively low abundances of Micula decussate Vekshina, 1959 signals a diagenetic effect and stressful environment in the Late Maastrichtian, whereas the relatively low abundances of Thoracosphaera operculata Bramlette & Martini, 1964, Braarudosphaera bigelowii (Gran & Braarud, 1935) Deflandre, 1947 and Futyania petalosa (Ellis & Lohmann, 1973) Varol, 1989 in the Danian assemblages indicate unstable environmental conditions and major environmental perturbations that reflect tectonic activity in the region. No nannofossils were encountered in those samples taken from turbiditic levels, which contained high proportions of sand.","PeriodicalId":55108,"journal":{"name":"Geologia Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47525234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distribution of sulphur, phosphorous, iron, and trace elements in bottom sediment cores, mussels and fish from the Punat Bay (Island of Krk, Croatia) 普纳特湾(克罗地亚克尔克岛)底部沉积物岩心、贻贝和鱼类中硫、磷、铁和微量元素的分布

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2022-10-26 DOI: 10.4154/gc.2022.29

Tatjana Ivošević, I. Halkijevic, N. Bilandžić, K. Licht, M. Sedak, Ivica Orlić, Damir Bucković, Š. Kampić

{"title":"Distribution of sulphur, phosphorous, iron, and trace elements in bottom sediment cores, mussels and fish from the Punat Bay (Island of Krk, Croatia)","authors":"Tatjana Ivošević, I. Halkijevic, N. Bilandžić, K. Licht, M. Sedak, Ivica Orlić, Damir Bucković, Š. Kampić","doi":"10.4154/gc.2022.29","DOIUrl":"https://doi.org/10.4154/gc.2022.29","url":null,"abstract":"Ships and associated anthropogenic activities release a number of contaminant elements into the marine environment which can be particularly concentrated in restricted circulatory environments including Bays and marinas. One such locality is a Punat Bay, situated at the southern coastline of the island of Krk (west Croatia), which is the largest Croatian marina. The aim of this study was to examine depth profiles of sulfur (S), phosporous (P), iron (Fe), and trace elements (As, Ba, Be, Cd, Co, Cr, Cu, Hg, Mn, Mo, Ni, Pb, Sn, Sr, Ti, U, V, Y, and Zn) in six sediment cores (down to 20-30 cm), and from mussels and fish from Punat Bay, by determining their levels with ICP-OES. Data analysis showed that the majority of variables were elevated in a sediment core located closest a port of the marina. Minimum to maximum S, P, and Fe levels in sediments were as follows: 0.4-2.4%, 0.04-320 mg/kg, and 0.2-2.3%, respectively. Correlations among S, P, Fe, and various trace elements were mostly positive (p<0.05). Trace elements were not increased in mussels and fish. This paper shows that the Punat marina has only a limited impact on the environmental status. Several potentially toxic trace elemens (Pb, Cu, etc.) were found to be elevated in a sediment core located closest to the marina.","PeriodicalId":55108,"journal":{"name":"Geologia Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42515412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Vulnerability methods in hard rock formation as a basis for groundwater risk assessment – from resource to source 作为地下水风险评估基础的硬岩层脆弱性方法——从资源到水源

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2022-10-26 DOI: 10.4154/gc.2022.23

V. Živanović, Igor Jemcov, V. Dragišić

{"title":"Vulnerability methods in hard rock formation as a basis for groundwater risk assessment – from resource to source","authors":"V. Živanović, Igor Jemcov, V. Dragišić","doi":"10.4154/gc.2022.23","DOIUrl":"https://doi.org/10.4154/gc.2022.23","url":null,"abstract":"Groundwater in a hard rock formation is most endangered at places where a potential source can discharge contaminants that can reach the saturated zone of an aquifer. In these circumstances, an essential tool for groundwater protection is the contamination risk map. This map is based on the integration of two maps: a hazards map, i.e., map of potential sources of contamination and a vulnerability map. The selection of a proper vulnerability method is an important task since the resulting vulnerability map can significantly impact the final risk of contamination map. The most appropriate method for groundwater vulnerability assessment was considered in the case study of Tara National park, in Western Serbia. The four commonly used methods were applied to assess the intrinsic vulnerability maps: DRASTIC, EPIK, PI and COP. All the applied methods resulted in different vulnerability maps in assessing the degree of vulnerability, consequently influencing the groundwater contamination risk maps. The applied research presents an example of how contamination risk should be assessed in a specific area. Comparison of the results obtained for the area of Tara National Park indicates the preference of the PI method as a well-balanced method, taking into account all the specifics of the study area. A detailed analysis of the assessed risks in the catchments of the existing sources was also conducted to indicate probable sources of contamination and confirm the degree of accuracy of the created vulnerability and risk maps. The conducted research emphasizes the necessity to adopt a clear conceptual hydrogeological model and to apply several methods simultaneously to determine the optimal one for each individual area.","PeriodicalId":55108,"journal":{"name":"Geologia Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44058314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Žune Ba-F epithermal deposit Part 1: Mineralogical and geochemical characteristics Žune Ba-F浅成热液矿床第1部分:矿物学和地球化学特征

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2022-10-26 DOI: 10.4154/gc.2022.24

Sibila Borojević Šoštarić, Martin Roglić, Aleksej Miloševič, T. Brenko

{"title":"Žune Ba-F epithermal deposit Part 1: Mineralogical and geochemical characteristics","authors":"Sibila Borojević Šoštarić, Martin Roglić, Aleksej Miloševič, T. Brenko","doi":"10.4154/gc.2022.24","DOIUrl":"https://doi.org/10.4154/gc.2022.24","url":null,"abstract":"The Žune Ba-F epithermal deposit is situated in the Ljubija ore field (NW Bosnia and Herzegovina), within Upper Palaeozoic dolostone. A typical ESE-WNW Variscan vergency fault zone separates the dolostone from Lower Triassic schists and sandstones. External and internal pseudo-bedding, with massive, homogenous structure and partial limonitization characterizes the dolostone. Its geochemical composition exhibits low SiO2 (1.33 – 2.06 mass. %), Al2O3 (0.27 –0.38 mass. %), BaO (0.02 – 0.83 mass. %), ƩREE (5.7 – 9.4 ppm), Sr (61.7 – 120.4 ppm), Sm (0.3 – 2.2 ppm) and Eu (0.1 – 0.6 ppm), while having high CaO (30.24 – 32.38 mass. %), MgO (16.47 – 17.35 mass. %) and LOI (44.6 – 45.58 mass. %). The dolostone-mineralization contact zone consists of metasomatically recrystallised host dolostone with quartz and pyrite, where the presence of accessory tremolite, magnesiochloritoid and pyknite indicates peak formation conditions in the pre-mineralization phase with temperatures above 300°C. Two ore types are described: (i) Ba-F vein-type mineralization composed of barite – fluorite ± quartz, and (ii) hydrothermal breccia composed of coarse-grained fluorite and barite, surrounding fragments of dolostone, and occupying ≈20 % of the deposit. Mineralized samples show slightly elevated SiO2 (2.20 – 5.53 mass. %) and Al2O3 (0.24 – 0.74 mass. %), low MgO (below 0.02 mass. %) and LOI (0.3 – 3.1 %), with high BaO (up to 50.74 mass. %), CaO (up to 66.03 mass. %), ƩREE (20 – 166 ppm), Sr (exceeding 1 mass. %), Sm (up to 118 ppm) and Eu (up to 44 ppm). Elevated Sr can be correlated to other barite epigenetic hydrothermal deposits in the Dinarides, interpreted as BaSr substitution in the barite crystal lattice. Fluorite-rich samples are characterized by Y (0.6 –49.2 ppm) and HREE enrichment, accompanied by depletion of LREE. The Ba-F deposit Žune, having variable REE concentration and a negative cerium and ytterbium anomaly corresponds geochemically to world-class fluorite deposits associated with carbonate sedimentary rocks.","PeriodicalId":55108,"journal":{"name":"Geologia Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46108434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

General features of some pollymetalic ore deposits in the Republic North Macedonia 北马其顿共和国一些多金属矿床的一般特征

IF 1.3 4区地球科学

Geologia Croatica Pub Date : 2022-10-17 DOI: 10.4154/gc.2022.27

T. Serafimovski, G. Tasev, T. Stafilov

引用次数: 2