Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.211
Aleksandar Gadzhalov, Irina Marinova, Mihail Tarassov, Liliya Tsvetanova, E. Tacheva
Here we present statistical and geochemical data on 12 minor and trace elements from pyrite- and marcasite-bearing samples from drillhole cores in the Sarnak (also known as Surnak) gold deposit. The data were obtained by SEM-EDX and single-spot LA-ICP-MS analyses in marcasite and different pyrite zones – core, mantle, and rim.
{"title":"Minor and trace elements in pyrite and marcasite from the Sarnak low-sulfidation gold deposit, SE Bulgaria. Part 1","authors":"Aleksandar Gadzhalov, Irina Marinova, Mihail Tarassov, Liliya Tsvetanova, E. Tacheva","doi":"10.52215/rev.bgs.2023.84.3.211","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.211","url":null,"abstract":"Here we present statistical and geochemical data on 12 minor and trace elements from pyrite- and marcasite-bearing samples from drillhole cores in the Sarnak (also known as Surnak) gold deposit. The data were obtained by SEM-EDX and single-spot LA-ICP-MS analyses in marcasite and different pyrite zones – core, mantle, and rim.","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":"139188533","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.63
R. Vassileva, Sylvina Georgieva, J. Cempírek, V. Grozdev, R. Škoda, Elitsa Stefanova
Large pegmatite body/bodies are outcropping in the “Suhata Reka” quarry, near the town of Rakitovo. Their bulk mineral composition with dominant K-feldspar (40%), plagioclase (30%), quartz (25%) and mica (≤ 5%) is complemented by (REE+Y)-bearing association of primary and secondary accessories. Zircon, monazite, xenotime, scarce apatite and noticeable amount of garnet are among the pegmatite primary minerals. The cm-sized almandine-spessartine crystals contain numerous fractures which host secondary (REE+Y)-bearing phosphate (xenotime, cheralite) and silicate minerals (e.g. REE-epidote). Formation of the late-stage REE-mineralization in garnet is due to its hydrothermal alteration and redistribution of REE+Y in the secondary phases.
拉基托沃镇附近的 "Suhata Reka "采石场出露了大型伟晶岩体。它们的主要矿物成分是钾长石（40%）、斜长石（30%）、石英（25%）和云母（≤ 5%），此外还有含（REE+Y）的原生和次生附属物。伟晶岩的原生矿物质包括锆石、独居石、氙石、稀少的磷灰石和相当数量的石榴石。厘米大小的天青石-菱锰矿晶体含有大量裂隙，这些裂隙承载着含次生（REE+Y）磷酸盐（氙石、绿泥石）和硅酸盐矿物（如 REE-橄榄石）。石榴石后期 REE 矿化的形成是由于其热液蚀变和次生相中 REE+Y 的重新分布。
{"title":"Garnet (REE+Y)-bearing mineral association in pegmatite from the Chepino lithotectonic Unit, Western Rhodopes","authors":"R. Vassileva, Sylvina Georgieva, J. Cempírek, V. Grozdev, R. Škoda, Elitsa Stefanova","doi":"10.52215/rev.bgs.2023.84.3.63","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.63","url":null,"abstract":"Large pegmatite body/bodies are outcropping in the “Suhata Reka” quarry, near the town of Rakitovo. Their bulk mineral composition with dominant K-feldspar (40%), plagioclase (30%), quartz (25%) and mica (≤ 5%) is complemented by (REE+Y)-bearing association of primary and secondary accessories. Zircon, monazite, xenotime, scarce apatite and noticeable amount of garnet are among the pegmatite primary minerals. The cm-sized almandine-spessartine crystals contain numerous fractures which host secondary (REE+Y)-bearing phosphate (xenotime, cheralite) and silicate minerals (e.g. REE-epidote). Formation of the late-stage REE-mineralization in garnet is due to its hydrothermal alteration and redistribution of REE+Y in the secondary phases.","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":"139188885","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.219
Victoria Vangelova, Martin Dobrev
The concentrations of trace elements in pyrite and enargite-luzonite from target 185 of the copper-gold high sulphidation Chelopech deposit were determined by LA-ICP-MS. Their average contents in ppm based on 12 analyses of pyrite and 10 analyses of enargite-luzonite are respectively: Ti (6548) > Cu (3449) > V (580) > Mn (299) > Pb (173) > As (157) > Se (149) > Te (122) > Zn (80) > Co (79) > Bi (41) > Cr (29) > W (25) > Sn (22) > Ni (17) > Au, Ga (15) > Ag (14) > Mo (9) > Sb (5) > Tl (4) > Hg (1) > In (0.2) for the first one and Fe (26531) > Zn (22140) > Sb (11014) > Bi (7956) > Se (1730) > Sn (1016) > Pb (995) > Te (326) > Mn (205) > Mo (170) > Hg (100) > Ge (88) > Ag (46) > Ti (42) > W (25) > Cd (24) > V (19) > Au (16) > In (4) > Tl (3) > Ga (1) for the second.
采用 LA-ICP-MS 方法测定了铜金高硫化 Chelopech 矿床 185 号靶区黄铁矿和鹅耳石-吕宋岩中的微量元素浓度。根据对黄铁矿的 12 次分析和对鹅绿泥石的 10 次分析，它们的平均含量（以 ppm 为单位）分别为钛（6548）>铜（3449）>钒（580）>锰（299）>铅（173）>砷（157）>硒（149）>碲（122）>锌（80）>钴（79）>铋（41）>铬（29）>钨（25）>锡（22）>镍（17）>金、镓（15）>银（14）>钼（9）>锑（5）>钛（4）>汞（1）>铟（0.2），而第二种则是 Fe (26531) > Zn (22140) > Sb (11014) > Bi (7956) > Se (1730) > Sn (1016) > Pb (995) > Te (326) > Mn (205) > Mo (170) > Hg (100) > Ge (88) > Ag (46) > Ti (42) > W (25) > Cd (24) > V (19) > Au (16) > In (4) > Tl (3) > Ga (1)。
{"title":"Ore-bearing potential of target 185 in the Chelopech deposit: a LA-ICP-MS study","authors":"Victoria Vangelova, Martin Dobrev","doi":"10.52215/rev.bgs.2023.84.3.219","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.219","url":null,"abstract":"The concentrations of trace elements in pyrite and enargite-luzonite from target 185 of the copper-gold high sulphidation Chelopech deposit were determined by LA-ICP-MS. Their average contents in ppm based on 12 analyses of pyrite and 10 analyses of enargite-luzonite are respectively: Ti (6548) > Cu (3449) > V (580) > Mn (299) > Pb (173) > As (157) > Se (149) > Te (122) > Zn (80) > Co (79) > Bi (41) > Cr (29) > W (25) > Sn (22) > Ni (17) > Au, Ga (15) > Ag (14) > Mo (9) > Sb (5) > Tl (4) > Hg (1) > In (0.2) for the first one and Fe (26531) > Zn (22140) > Sb (11014) > Bi (7956) > Se (1730) > Sn (1016) > Pb (995) > Te (326) > Mn (205) > Mo (170) > Hg (100) > Ge (88) > Ag (46) > Ti (42) > W (25) > Cd (24) > V (19) > Au (16) > In (4) > Tl (3) > Ga (1) for the second.","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":"139190460","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.337
Lyuba Dimova, L. Dimitrova, R. Raykova
The first seismic station of the Seismic Network of Sofia University (SNSU) was built in 2023 with funding from the Scientific Research Fund of Sofia University “St. Kliment Ohridski”. The station is operating in the Faculty of Physics since September 2023. The equipment consists of a seismometer Geophone 4.5 Hz and a digitiser PSN-ADC24. A portable computer is used for data recording and archiving. During the month of station operation several earthquakes in Bulgaria and neighbouring countries were analysed. The spectrum of the seismic noise from the station was analysed for different periods. The characteristics of the terrain of station installation were also determined using the method H/V. Although the equipment has modest capabilities, it allows students and young scientists to work directly with the seismic equipment and to do scientific investigations. The possibility of scientific research will be expanded renewing the equipment (purchased in October 2023).
{"title":"First station from the Sofia University Seismic Network","authors":"Lyuba Dimova, L. Dimitrova, R. Raykova","doi":"10.52215/rev.bgs.2023.84.3.337","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.337","url":null,"abstract":"The first seismic station of the Seismic Network of Sofia University (SNSU) was built in 2023 with funding from the Scientific Research Fund of Sofia University “St. Kliment Ohridski”. The station is operating in the Faculty of Physics since September 2023. The equipment consists of a seismometer Geophone 4.5 Hz and a digitiser PSN-ADC24. A portable computer is used for data recording and archiving. During the month of station operation several earthquakes in Bulgaria and neighbouring countries were analysed. The spectrum of the seismic noise from the station was analysed for different periods. The characteristics of the terrain of station installation were also determined using the method H/V. Although the equipment has modest capabilities, it allows students and young scientists to work directly with the seismic equipment and to do scientific investigations. The possibility of scientific research will be expanded renewing the equipment (purchased in October 2023).","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":"139190729","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.237
Zornitsa Dotseva, I. Gerdjikov, D. Vangelov
On September 2nd, 2022, an intense and prolonged rainfall event caused severe flooding, landslides, debris flows, and groundwater rise, resulting in substantial damage, particularly in the northern slopes of Sredna Gora Mountain in Central Bulgaria. Various methodologies, including field analysis, remote sensing, and GIS tools, were employed to analyze the disaster’s causes and field conditions. Active sediment sources, deposition patterns, and mapping techniques were used to document the disaster’s impact. The results showed that the disaster resulted from the formation of numerous landslides, and rapid hydrological response led to riverine flooding, high-speed flows, and sediment deposition. An important contribution of this study is the generated landslide inventory map, that can be used for mountain road reconstruction and the planning of mitigation measures.
2022 年 9 月 2 日，一场持续时间较长的强降雨引发了严重的洪水、山体滑坡、泥石流和地下水上升，造成了重大损失，尤其是在保加利亚中部 Sredna Gora 山的北坡。我们采用了各种方法，包括实地分析、遥感和地理信息系统工具，对灾害的原因和实地情况进行了分析。研究人员利用活性沉积物来源、沉积模式和绘图技术来记录灾害的影响。结果表明，灾害是由大量山体滑坡形成的，而快速的水文反应导致了河水泛滥、高速水流和沉积物沉积。本研究的一个重要贡献是生成了滑坡清查图，可用于山区道路重建和减灾措施规划。
{"title":"Impact аssessment of the September 2022 disaster in the area of Karavelovo, Bogdan, and Slatina villages, Karlovo Municipality","authors":"Zornitsa Dotseva, I. Gerdjikov, D. Vangelov","doi":"10.52215/rev.bgs.2023.84.3.237","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.237","url":null,"abstract":"On September 2nd, 2022, an intense and prolonged rainfall event caused severe flooding, landslides, debris flows, and groundwater rise, resulting in substantial damage, particularly in the northern slopes of Sredna Gora Mountain in Central Bulgaria. Various methodologies, including field analysis, remote sensing, and GIS tools, were employed to analyze the disaster’s causes and field conditions. Active sediment sources, deposition patterns, and mapping techniques were used to document the disaster’s impact. The results showed that the disaster resulted from the formation of numerous landslides, and rapid hydrological response led to riverine flooding, high-speed flows, and sediment deposition. An important contribution of this study is the generated landslide inventory map, that can be used for mountain road reconstruction and the planning of mitigation measures.","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":"139190875","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.93
Svetoslav V. Georgiev, Lora Bidzhova
The chemical properties of mercury (Hg) such as volatility, organic affinity, multiple oxidation states and extreme biotoxicity, determine its various industrial applications, but also health hazard concerns. Mercury data on geologic materials are important for characterizing the main sources and sinks of Hg, for tracking volcanic activity in the geology past, for refining regional and global stratigraphic correlations, and for minimizing anthropogenic mercury emissions. Newly obtained Hg and CHNS analyzers available at the Geological Institute at the Bulgarian Academy of Sciences, facilitate new geologic and environmental research in Bulgaria. Here we show initial results for the accuracy and precision of our Hg analyses based on repeated measurements of certified reference material NIST 2702 and identify avenues for further analytical improvements. The encouraging results allow for the initiation of diverse geological and ecological studies that are needed, but currently lacking in Bulgaria.
汞（Hg）的化学特性，如挥发性、有机亲和性、多重氧化态和极强的生物毒性，决定了它的各种工业应用，也决定了它对健康的危害。地质材料中的汞数据对于确定汞的主要来源和汇的特征、追踪地质过去的火山活动、完善区域和全球地层关联以及最大限度地减少人为汞排放都非常重要。保加利亚科学院地质研究所（Geological Institute at the Bulgarian Academy of Sciences）新近获得的汞和 CHNS 分析仪有助于保加利亚开展新的地质和环境研究。在此，我们根据对认证参考材料 NIST 2702 的重复测量，展示了汞分析准确度和精确度的初步结果，并确定了进一步改进分析的途径。这些令人鼓舞的结果有助于启动保加利亚目前需要但缺乏的各种地质和生态研究。
{"title":"Mercury in geological materials from Bulgaria: Significance, applications, new analytical capabilities, and initial results","authors":"Svetoslav V. Georgiev, Lora Bidzhova","doi":"10.52215/rev.bgs.2023.84.3.93","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.93","url":null,"abstract":"The chemical properties of mercury (Hg) such as volatility, organic affinity, multiple oxidation states and extreme biotoxicity, determine its various industrial applications, but also health hazard concerns. Mercury data on geologic materials are important for characterizing the main sources and sinks of Hg, for tracking volcanic activity in the geology past, for refining regional and global stratigraphic correlations, and for minimizing anthropogenic mercury emissions. Newly obtained Hg and CHNS analyzers available at the Geological Institute at the Bulgarian Academy of Sciences, facilitate new geologic and environmental research in Bulgaria. Here we show initial results for the accuracy and precision of our Hg analyses based on repeated measurements of certified reference material NIST 2702 and identify avenues for further analytical improvements. The encouraging results allow for the initiation of diverse geological and ecological studies that are needed, but currently lacking in Bulgaria.","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":"139194282","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.137
Tzvetomila Vladinova, Milena Georgieva
The geochemistry of Triassic metacarbonate rocks from the Sakar unit, Sakar-Strandzha zone recorded condition on deposition environments and primary (protoliths) composition. The metacarbonate yielded trace element distribution that conform seawater condition on shallow shelves under oxic conditions and coincide interpretation of Chatalov (1990). The REE pattern determines low to moderate contamination of terrigenous material. The significant variation of Sr can be efficient for distinguish the metacarbonates in SE Bulgaria.
{"title":"Geochemistry of the Triassic metacarbonate rocks from the Sakar Unit, Sakar-Strandzha zone, SE Bulgaria","authors":"Tzvetomila Vladinova, Milena Georgieva","doi":"10.52215/rev.bgs.2023.84.3.137","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.137","url":null,"abstract":"The geochemistry of Triassic metacarbonate rocks from the Sakar unit, Sakar-Strandzha zone recorded condition on deposition environments and primary (protoliths) composition. The metacarbonate yielded trace element distribution that conform seawater condition on shallow shelves under oxic conditions and coincide interpretation of Chatalov (1990). The REE pattern determines low to moderate contamination of terrigenous material. The significant variation of Sr can be efficient for distinguish the metacarbonates in SE Bulgaria.","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":"139195758","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.27
S. Encheva, Nikolay Gospodinov, Denka Yanakieva, P. Petrov, Stela Atanasova-Vladimirova
New for Bulgaria arsenic minerals picropharmacolite and arsenolite from the Mareshnitsa ore occurrence, Eastern Rhodopes are presented. Their formation is due to the oxidation of arsenopyrite, which is abundant in the samples. The composition of the picropharmacolite from Mareshnitsa differs from the picropharmacolite from other deposits around the world. It is characterized by relatively few impurities and excess of Mg, which substitute part of Ca. This is resulting in smaller a parameter of the unit cell. The presence of these two new arsenic minerals sheds additional light on the behaviour of arsenic in the area.
{"title":"Picropharmacolite and arsenolite from the Mareshnitsa ore occurrence, Eastern Rhodopes – new minerals for Bulgaria","authors":"S. Encheva, Nikolay Gospodinov, Denka Yanakieva, P. Petrov, Stela Atanasova-Vladimirova","doi":"10.52215/rev.bgs.2023.84.3.27","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.27","url":null,"abstract":"New for Bulgaria arsenic minerals picropharmacolite and arsenolite from the Mareshnitsa ore occurrence, Eastern Rhodopes are presented. Their formation is due to the oxidation of arsenopyrite, which is abundant in the samples. The composition of the picropharmacolite from Mareshnitsa differs from the picropharmacolite from other deposits around the world. It is characterized by relatively few impurities and excess of Mg, which substitute part of Ca. This is resulting in smaller a parameter of the unit cell. The presence of these two new arsenic minerals sheds additional light on the behaviour of arsenic in the area.","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":"139191339","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.287
Miroslav Krastanov
The use of borehole cameras in Bulgaria is increasingly used in hydrogeology and engineering geology. The resulting photographs and movies contribute to solving problems related to the study and assessment of the condition of water supply wells, as well as to obtain a clear picture on the assessment of rock massifs for their suitability for various types of construction. Borehole cameras on the territory of our country are more widely used in the field of hydrogeology compared to engineering geology. The purpose of this article is to present the possible applications of this technology, which has been improved over the years, for the study of rock massifs in their study for various infrastructure objects. Also. to shed light on the benefits of using boreholes in surveying the various water sources.
{"title":"Application of borehole cameras in the field of Engineering Geology and Hydrogeology","authors":"Miroslav Krastanov","doi":"10.52215/rev.bgs.2023.84.3.287","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.287","url":null,"abstract":"The use of borehole cameras in Bulgaria is increasingly used in hydrogeology and engineering geology. The resulting photographs and movies contribute to solving problems related to the study and assessment of the condition of water supply wells, as well as to obtain a clear picture on the assessment of rock massifs for their suitability for various types of construction. Borehole cameras on the territory of our country are more widely used in the field of hydrogeology compared to engineering geology. The purpose of this article is to present the possible applications of this technology, which has been improved over the years, for the study of rock massifs in their study for various infrastructure objects. Also. to shed light on the benefits of using boreholes in surveying the various water sources.","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":"139191350","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.59
Svetla Stariradeva, P. Petrov, Denka Yanakieva
A late-deposited colloform banded sphalerite from Pcheloyad and Sporno deposits in samples from the Earth and Man National Museum was studied. Its composition is very close to the theoretical one for sphalerite. Iron, gallium, cadmium and indium are established as trace elements in concentrations lower than those in earlier deposited sphalerite generations. The presence of wurtzite was proved by X-ray powder diffraction. A similar low-temperature colloform banded sphalerite of the Schalenblende type has so far not been described in the lead-zinc Zvezdel-Pcheloyad ore field.
{"title":"Colloform sphalerite in Pcheloyad Pb-Zn deposit, Eastern Rodopes, Bulgaria","authors":"Svetla Stariradeva, P. Petrov, Denka Yanakieva","doi":"10.52215/rev.bgs.2023.84.3.59","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.59","url":null,"abstract":"A late-deposited colloform banded sphalerite from Pcheloyad and Sporno deposits in samples from the Earth and Man National Museum was studied. Its composition is very close to the theoretical one for sphalerite. Iron, gallium, cadmium and indium are established as trace elements in concentrations lower than those in earlier deposited sphalerite generations. The presence of wurtzite was proved by X-ray powder diffraction. A similar low-temperature colloform banded sphalerite of the Schalenblende type has so far not been described in the lead-zinc Zvezdel-Pcheloyad ore field.","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":"139191356","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}
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