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Review of the Bulgarian Geological Society最新文献

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Engineering geological conditions for the construction of a photovoltaic power plant on coal tailings 在煤炭尾矿上建设光伏发电站的工程地质条件
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.267
Stefan Frangov
{"title":"Engineering geological conditions for the construction of a photovoltaic power plant on coal tailings","authors":"Stefan Frangov","doi":"10.52215/rev.bgs.2023.84.3.267","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.267","url":null,"abstract":"Photovoltaic power plants have recently become increasingly common to reduce carbon emissions into the atmosphere. Non-fertile lands occupied by industrial waste are very suitable for their construction. The present study concerns the design and construction of a photovoltaic park on the territory of a reclaimed coal tailings dump “Suhoto Dere” near the TPP “Bobov Dol”. The study includes collection, processing and analysis of archival materials, site mapping, drilling of exploration boreholes, dynamic penetration tests, geophysical electrical resistivity survey, laboratory testing of soil samples to determine physical and mechanical properties; chemical analysis of soil samples to assess soil aggressiveness to concrete and steel. Based on the obtained data, an assessment of the suitability of the site is made and recommendations are given to prevent the occurrence of adverse phenomena and processes.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193138","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}
引用次数: 0
Geochemical characteristics of silty clays from the Brusartsi Formation 布鲁萨特西地层淤泥质粘土的地球化学特征
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.279
Metodi Karadjov, D. Karastanev, Boriana Tchakalova
{"title":"Geochemical characteristics of silty clays from the Brusartsi Formation","authors":"Metodi Karadjov, D. Karastanev, Boriana Tchakalova","doi":"10.52215/rev.bgs.2023.84.3.279","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.279","url":null,"abstract":"This study investigated the geochemical characteristics of Pliocene clay sediments from the Brusartsi Formation, situated in the area of the town of Kozloduy, North Bulgaria). The main objective of the study is to characterize the Brusartsi clays as a natural barrier against pollutant and radionuclide migration. Based on mineralogical and geochemical analyses, new results are obtained concerning the mineral composition, cation exchange capacity (CEC), specific surface area, etc., for the Brusartsi Formation.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139194910","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}
引用次数: 0
Preliminary data on the mineral chemistry of garnet from the skarn alteration associated with the Elatsite porphyry-copper gold deposit, Bulgaria 关于保加利亚 Elatsite 斑岩铜金矿床相关矽卡岩蚀变中石榴石矿物化学的初步数据
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.31
H. Georgieva, R. Nedialkov, Elitsa Stefanova, Georgi Milenkov, Ivan Krumov, Neven Georgiev
{"title":"Preliminary data on the mineral chemistry of garnet from the skarn alteration associated with the Elatsite porphyry-copper gold deposit, Bulgaria","authors":"H. Georgieva, R. Nedialkov, Elitsa Stefanova, Georgi Milenkov, Ivan Krumov, Neven Georgiev","doi":"10.52215/rev.bgs.2023.84.3.31","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.31","url":null,"abstract":"The skarn alteration is poorly preserved at the Elatsite, restricted to the hornfelses from the East, Southeast and Southern part of the deposit. The rocks are defined as exoskarns, with a mineral composition including garnets, epidote, pyroxene, amphiboles, carbonates, prehnite, quartz, sulphides. The newly formed minerals occur in poorly preserved layers. The garnet grains are subhedral with inclusions of epidote and quartz, while some of them are corrode with carbonate and zeolites formed in the fractures. The garnets are grossular-andradite type, with higher values for HREE over LREE, and low values for Rb, Sr, Ba, Pb and U. The skarn formation is related with the intrusion of the magma which causes the heating of the metamorphic rocks (rich in carbonate material – chlorite-sericite-carbonite, sericite-carbonate schists, etc.) from the low-grade metamorphic rocks. The Fe+3–Al+3 exchanges in the cores of the garnets indicate their formation from fluids with high oxygen fugacity.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139194965","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}
引用次数: 0
Coexisting nickel diarsenide polymorphs in the five-element mineralization of the Bihor metallogenetic district, Apuseni Mountains, Romania 罗马尼亚阿普塞尼山脉比霍尔成矿带五元素矿化中并存的二砷化镍多晶体
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.51
G. Săbău, George Dincă, Andra-Elena Filiuță
{"title":"Coexisting nickel diarsenide polymorphs in the five-element mineralization of the Bihor metallogenetic district, Apuseni Mountains, Romania","authors":"G. Săbău, George Dincă, Andra-Elena Filiuță","doi":"10.52215/rev.bgs.2023.84.3.51","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.51","url":null,"abstract":"The three known polymorphs of nickel diarsenide were found to coexist in apparent equilibrium in the five-element mineralizations of the Bihor Metallogenetic District. It is the first identification of pararammelsbergite and krutovite in Romania, and the locality joins a very limited list of occurrences where all three NiAs2 polymorphs coexist. Both phases newly identified in Romania are easily distinguishable from rammelsbergite by their optical properties and display consistent compositional differences manifested in stoichiometry and degree of isomorphic substitution. The NiAs2 polymorphs coexist with nickeline and skutterudite and apparently predate cobaltite-gersdorffite in a mesothermal depositional sequence characterized by initial separation of Ni and Co in metal-poorer arsenides, followed by continuous decrease of arsenic activity, increase in sulfur activity, modal increase of nickeline and Co enrichment in the gersdorffite-cobaltite series.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139195023","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}
引用次数: 0
The crustal thickness in the Rhodope Metamorphic Complex area from the perspective of the present-day geological knowledge 从当今地质知识的角度看罗多彼变质岩群地区的地壳厚度
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.155
Neven Georgiev
{"title":"The crustal thickness in the Rhodope Metamorphic Complex area from the perspective of the present-day geological knowledge","authors":"Neven Georgiev","doi":"10.52215/rev.bgs.2023.84.3.155","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.155","url":null,"abstract":"The crustal thickness in the area of the Rhodope Metamorphic Complex decreases from west to east from ~50 km to ~30 km. This regional-scale feature is mostly due to the different rates of extension that the basement rocks experienced in different parts of the complex. In our model, we postulate that the crustal thickness in the area is an effect of the late Eocene zipper-like or hinge-like extensional tectonics that caused a larger amount exhumation of high-grade metamorphic rocks in the eastern parts of the area and lesser one in the west. This zipper-like orogen parallel extension caused a vast tectonic erosion and progressive thinning of the crust from west to east.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139196168","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}
引用次数: 0
Fractionation of W in the topsoil of a meadow soil above the oxidation zone of the W deposit: results of sequential extraction and LA-ICP-MS analysis of soil from the Grantcharitsa deposit, Bulgaria W 矿床氧化区上方草甸土壤表层土壤中 W 的分馏：对保加利亚 Grantcharitsa 矿床土壤进行顺序提取和 LA-ICP-MS 分析的结果
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.257
Mihail Tarassov, Nadezhda Lihareva, E. Tarassova, E. Tacheva, Milen Stavrev
{"title":"Fractionation of W in the topsoil of a meadow soil above the oxidation zone of the W deposit: results of sequential extraction and LA-ICP-MS analysis of soil from the Grantcharitsa deposit, Bulgaria","authors":"Mihail Tarassov, Nadezhda Lihareva, E. Tarassova, E. Tacheva, Milen Stavrev","doi":"10.52215/rev.bgs.2023.84.3.257","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.257","url":null,"abstract":"A four-step sequential extraction procedure (SEP) was used to assess the distribution of W fractionation in the topsoil (0–20 cm) of the soil above the oxidation zone of the W deposit. Data on the extraction of W and other elements were obtained using LA-ICP-MS and SEM-EDX analyses of the dried, sieved and finely grinded original soil and residual samples after each step of the procedure. When processing LA-ICP-MS data, the SiO2 content of the original soil was used as an internal standard for all samples in the sequential extraction procedure. It was found that of the approximately 90 ppm of total W content in the soil, about 25% is associated with organic matter, 40% with amorphous hydrous Fe oxides (ferrihydrite), 25% with crystalline hydrous Fe oxides (goethite), and about 10% with residual material (scheelite, silicates).","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191018","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}
引用次数: 0
Carboniferous sills and related metasomatic activity in the area of Asaritsa Peak, West Stara Planina Mountain 西斯塔拉普兰纳山阿萨里萨峰地区的石炭纪山体及相关的变质活动
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.85
Stoyan Georgiev, Elitsa Stefanova, A. Hikov, I. Peytcheva, V. Sachanski, Milen Stavrev
{"title":"Carboniferous sills and related metasomatic activity in the area of Asaritsa Peak, West Stara Planina Mountain","authors":"Stoyan Georgiev, Elitsa Stefanova, A. Hikov, I. Peytcheva, V. Sachanski, Milen Stavrev","doi":"10.52215/rev.bgs.2023.84.3.85","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.85","url":null,"abstract":"Two diorite to monzodiorite sills are recently found among the Silurian sedimentary succession near to Asaritsa peak, West Stara Planina Mountain. Several levels with diagenetic metalliferous nodules occur within shale interval in the sediments. The magmatic rocks are affected by strong propylitic to sericitic alteration (chlorite, sericite, albite and quartz) and only relicts of the rock-forming minerals (feldspar, biotite and clinopyroxene) are observed. The bodies are crosscut by thin quartz veins and disseminated pyrite is observed. The chondrite normalized spidergrams show patterns similar to orogenic rocks, with very high peaks of Th and U and depletion in Sr and Ti. The zircon U-Pb geochronology reveals that the magmatic crystallization is during the Carboniferous period – 326.4±3.2 Ма, with low content of xenocryst most probably from the sedimentary basement. The magmatic activity coincides with the Variscan orogeny formed during the late Paleozoic and most probabaly is related to the evolution of the alkaline Buhovo-Seslavtsi Pluton which is situated just to the south, at a direct proximity. The different composition of the pyrite from the sills and the diagenetic nodules from the sediments is most probably due to their different genesis. While the alterations of the nodules can be attributed to metasomatic processes related to the magmatic activity.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191193","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}
引用次数: 0
A contribution to the understanding of the discharge dynamics and water balance of the karst spring Gornji Dušnik (Suva Planina) 有助于了解岩溶泉 Gornji Dušnik（苏瓦普兰纳）的排放动态和水平衡
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215//rev.bgs.2023.84.3.315
Aleksandar Tanasković, Vesna Ristić Vakanjac, D. Polomcic, Jelena M. Močević
{"title":"A contribution to the understanding of the discharge dynamics and water balance of the karst spring Gornji Dušnik (Suva Planina)","authors":"Aleksandar Tanasković, Vesna Ristić Vakanjac, D. Polomcic, Jelena M. Močević","doi":"10.52215//rev.bgs.2023.84.3.315","DOIUrl":"https://doi.org/10.52215//rev.bgs.2023.84.3.315","url":null,"abstract":"A sufficiently long time-series of daily discharges is needed to assess the discharge dynamics and calculate the water balance equation parameters of a spring (river source). The paper assumes that a catchment is gauged if a time-series of observations of at least 30 years is available, which is a rare case in Serbia. One-year monitoring is often set up to verify the reserves of a water source or spring intended for capture. Monitoring ceases after the final report is produced. The paper aims to show potential problems if there are no sufficiently long time-series and if no detailed hydrogeological investigations have been undertaken. The Gornji Dušnik Spring is used as an example. That spring drains the western parts of Suva Planina Mountain. It was captured many years ago to provide public water supply to the town of Gadžin Han and the nearby villages of Donji Dušnik and Gornji Dušnik.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139192275","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}
引用次数: 0
Petrography and geochemistry of Cretaceous bauxites from Jajce, Bosnia and Herzegovina 波斯尼亚和黑塞哥维那亚伊采白垩纪铝土矿的岩石学和地球化学研究
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.77
Šime Bilić, I. Peytcheva, Stoyan Georgiev, A. Hikov, Ivica Pavičić, Gordana Deljak, F. Šumanovac, Marko Holma
{"title":"Petrography and geochemistry of Cretaceous bauxites from Jajce, Bosnia and Herzegovina","authors":"Šime Bilić, I. Peytcheva, Stoyan Georgiev, A. Hikov, Ivica Pavičić, Gordana Deljak, F. Šumanovac, Marko Holma","doi":"10.52215/rev.bgs.2023.84.3.77","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.77","url":null,"abstract":"The study presents petrographic and compositional data of Late Cretaceous bauxite deposits in the area of Jajce, Bosnia and Herzegovina. Results indicate that bauxites exhibit ooidic to pisodic textures enclosed within a pelitomorfic matrix. Most of the deposits are boehmitic but in some localities, a considerable quantity of diaspore is identified. Hematite is the dominant Fe-mineral, while kaolinite, goethite and calcite are minor. The accessory minerals are represented by anatase, rutile and zircon. Al2O3 content ranges between 54.32–61.05 wt % and is negatively correlated to Fe2O3. Rare earth elements (REE) show variable concentrations, reaching up to 1353 ppm. The chondrite normalized patterns reveal negative Eu anomaly in all and positive Ce anomaly in almost all samples. Ce anomaly shows negative correlation with REE. Bauxites from the Jajce area represent valuable mineral resource with potentially valuable quantities of REE and Sc. Mineralogy and geochemical signature indicate a complex petrogenetic history.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193344","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}
引用次数: 0
Efficient benchtop acid digestion of organic-rich sediments for ICP-MS analyses: testing analytical procedures on NIST 2702 standard reference material 用于 ICP-MS 分析的富含有机物沉积物的高效台式酸消化：在 NIST 2702 标准参考材料上测试分析程序
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.73
Lora Bidzhova, Emiliya D. Raeva, Gatien L. F. Morin, Svetoslav V. Georgiev
{"title":"Efficient benchtop acid digestion of organic-rich sediments for ICP-MS analyses: testing analytical procedures on NIST 2702 standard reference material","authors":"Lora Bidzhova, Emiliya D. Raeva, Gatien L. F. Morin, Svetoslav V. Georgiev","doi":"10.52215/rev.bgs.2023.84.3.73","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.73","url":null,"abstract":"Trace element abundances in organic-rich sediments are widely used in various fields of the geosciences, yet few contributions discuss the effectiveness of low-cost benchtop acid digestion techniques for such samples. Here, we tested three different sample preparation methods (acid digestion in closed and open vessels, and fusion) on twelve powder aliquots of organic-rich sediment, standard reference material NIST 2702. Comparison of newly obtained ICP-MS and LA-ICP-MS results with their respective certificate values, facilitates the assessment of digestion efficiency and the effects of vessel size, acid mixture, and other parameters on the recoveries of 29 trace elements. Our results show that benchtop digestion of organic-rich sediment in closed 7 mL PFA vessels using HF+HNO3+HClO4 mixture is more efficient compared with open vessel digestion treated with the same acid mixture (± HCl), with closed or open vessel digestions without HClO4, and with LA-ICP-MS measurements on fused glass discs.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139194393","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}
引用次数: 0
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