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Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society最新文献

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Calcareous nannoplankton response model of the global warming at the Paleocene-Eocene boundary in Riben section, Northern Bulgaria 保加利亚北部里本地区古新世-始新世边界全球变暖的钙质浮游动物响应模型
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.157
K. Stoykova, M. Ivanov
{"title":"Calcareous nannoplankton response model of the global warming at the Paleocene-Eocene boundary in Riben section, Northern Bulgaria","authors":"K. Stoykova, M. Ivanov","doi":"10.52215/rev.bgs.2022.83.3.157","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.157","url":null,"abstract":"We present a model of calcareous nannoplankton response of the global warming at the PETM, based on studies of Bulgarian sections. New data acquired from forams’carbon and oxygen isotopes, as well as high-resolution quantitative study of calcareous nannofossils suggest 3 phases of the event: pre-PETM, core of PETM and recovery phase. During the core phase, a significant increase in warm-water nannofossil species was registered, as well as signs of acidification and higher salinity of the surface waters (dissolution of carbonate skeletons of nannofossils). In the recovery phase, the cold-water species from pre-event conditions gradually return, however g. Fasciculithus completely disappears.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46544172","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: 1
Trace-element signatures of pegmatite and post-pegmatite minerals from the Govedarnika Pb-Zn deposit, Laki district, Central Rhodopes 罗多佩中部拉基区Govedarnika铅锌矿床伟晶岩和后伟晶岩矿物的微量元素特征
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.89
Y. Georgieva, Georgi Milenkov, R. Vassileva, Sylvina Georgieva
{"title":"Trace-element signatures of pegmatite and post-pegmatite minerals from the Govedarnika Pb-Zn deposit, Laki district, Central Rhodopes","authors":"Y. Georgieva, Georgi Milenkov, R. Vassileva, Sylvina Georgieva","doi":"10.52215/rev.bgs.2022.83.3.89","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.89","url":null,"abstract":"The current study presents mineralogical and geochemical characteristics of pegmatite bodies from the Govedarnika Pb-Zn deposit, situated in Laki district, South Bulgaria. The studied pegmatites are composed mainly of K-feldspar, plagioclase, quartz and accessories of titanite, apatite, allanite and zircon. Intensive hydrothermal alteration resulted in specific mineral assemblage of chlorite, hematite, epidote and carbonates. According to the mineral relationships, it preceded or coincided with the time of base metal ore formation and affected both pegmatites and host metamorphic rocks. Both pegmatite accessories and post-pegmatite hydrothermal silicates often show enhanced contents of some strategic elements such as Sr, Li, V, Ga, Ni and REE. Pilot U-Pb geochronology of titanite from the studied pegmatites yielded a lower intercept age of 39.9±2.3 Ma.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46124134","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
Geochemistry of Triassic metasediments from easternmost part of Sakar Unit, Sakar-Strandzha Zone, SE Bulgaria 保加利亚东南部萨卡尔-斯特兰扎带萨卡尔单元最东部三叠纪变质沉积物的地球化学
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.85
M. Georgieva, Tzvetomila Vladinova
{"title":"Geochemistry of Triassic metasediments from easternmost part of Sakar Unit, Sakar-Strandzha Zone, SE Bulgaria","authors":"M. Georgieva, Tzvetomila Vladinova","doi":"10.52215/rev.bgs.2022.83.3.85","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.85","url":null,"abstract":"Triassic metasediments from the easternmost part of Sakar Unit, Sakar-Strandzha Zone, SE Bulgaria, show a high variety in their mineral and chemical composition from shales, wakes, litharenites to arkoses. Geochemical signatures suggest low to moderate weathering degree at their source and upper continental crust composition. The Triassic metasedimentary rocks were derived from felsic to intermediate igneous rocks with some recycled sediment input. On tectonic setting discrimination diagrams, based on immobile trace elements, the studied metasediments fall in the fields of continental island arc and active continental margin.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42626501","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
Mineral composition of quartz-polymetallic veins in Sally Rocks, Livingston Island, Antarctica 南极洲利文斯顿岛萨利岩石英多金属矿脉的矿物组成
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.182
Ralica Sabeva, Stefan Velev
{"title":"Mineral composition of quartz-polymetallic veins in Sally Rocks, Livingston Island, Antarctica","authors":"Ralica Sabeva, Stefan Velev","doi":"10.52215/rev.bgs.2022.83.3.182","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.182","url":null,"abstract":"The quartz-polymetallic veins from Sally Rocks, Livingston Island, Antarctica are hosted in the Miers Bluff Formation, particularly in the sedimentary sequences of the Sally Rocks member, consisting of thin bedded alternation of mudstone and sandstone. The veins consist of chalcopyrite, sphalerite, galena, pyrite, and arsenopyrite. Chalcopyrite and sphalerite predominate, galena is second in distribution, and pyrite and arsenopyrite are in a subordinate amount. According to the geological setting, textures, and mineral assemblages, the ore mineralization in Sally Rocks can be determined as hydrothermal which corresponds to the genesis of the other ore occurrences in the Hurd Peninsula.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42102663","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
Interpretation of CPTu and SPT data about sandy soils in the Plovdiv region 普罗夫迪夫地区沙质土壤的CPTu和SPT数据解释
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.235
Lyubomir Angelov, Tanya Vasileva
{"title":"Interpretation of CPTu and SPT data about sandy soils in the Plovdiv region","authors":"Lyubomir Angelov, Tanya Vasileva","doi":"10.52215/rev.bgs.2022.83.3.235","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.235","url":null,"abstract":"CPTu (Piezocone Penetration Test) and Penetration tests – SPT (Standard Penetration Test) are the most used in situ tests in order to map a soil stratigraphy and determine the geotechnical parameters of construction soils. A comparison has been made between the relative density values obtained on the basis of the two types of field trials. The soils examined are classified according to well-established classification diagrams. The sandy soils are described in the range of dense to very dense. They have good strength and deformation characteristics – with a high friction angle and high Young’s modulus but the presence of a high level of groundwater is a prerequisite for their liquefaction under dynamic impacts.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48684187","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
Optical cathodoluminescence petrography, combined with SEM and LA-ICP-MS analyses: a case study from the Elatsite porphyry Cu-Au deposit 光学阴极发光岩相学与SEM和LA-ICP-MS分析相结合:以黄铜矿斑岩型铜金矿为例
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.117
Elitsa Stefanova, M. Kadiyski, S. Georgiev, A. Hikov, Sylvina Georgieva, I. Peytcheva
{"title":"Optical cathodoluminescence petrography, combined with SEM and LA-ICP-MS analyses: a case study from the Elatsite porphyry Cu-Au deposit","authors":"Elitsa Stefanova, M. Kadiyski, S. Georgiev, A. Hikov, Sylvina Georgieva, I. Peytcheva","doi":"10.52215/rev.bgs.2022.83.3.117","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.117","url":null,"abstract":"In the present research, we have applied a combination of Cold-CL petrography with two in-situ techniques (SEM-EDS and LA-ICP-MS) to study quartz-pyrite-sericite veins with some carbonates from the Elatsite porphyry Cu-Au deposit. Based on Cold-CL images, we found out that these veins are formed during two stages: quartz-pyrite with sericite and later quartz-carbonate with chlorite. Together with the quartz and carbonates small amount of arsenian pyrite, hematite, chalcopyrite, sphalerite, galena and apatite are precipitated. SEM-EDS and LA-ICP-MS allowed determining that the observed zoning of the pyrite from Q-Py stage is due to a variable Co and Ni content. Similarly, the zonal growth of calcite is due to variable Mn content. Pyrite and arsenian pyrite have different trace element composition. Arsenian pyrite has elevated Au, Ag, Cu, Pb, Sb and Tl contents compared to the pyrite. The combination of the three techniques was essential for resolving temporal relationships between the minerals within quartz-pyrite-carbonate veins and changes of the composition of the pyrite from the quartz-pyrite-sericite to the later quartz-carbonate stage.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48921634","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
Depositional conditions for Lower–Middle Jurassic sedimentary rocks from Northern Bulgaria inferred from whole-rock elemental composition 从全岩元素组成推断保加利亚北部下中侏罗世沉积岩的沉积条件
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.81
S. Georgiev, Gatien L. F. Morin, L. Bidzhova, N. Botoucharov
{"title":"Depositional conditions for Lower–Middle Jurassic sedimentary rocks from Northern Bulgaria inferred from whole-rock elemental composition","authors":"S. Georgiev, Gatien L. F. Morin, L. Bidzhova, N. Botoucharov","doi":"10.52215/rev.bgs.2022.83.3.81","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.81","url":null,"abstract":"The Lower–Middle Jurassic sedimentary rocks from Northern Bulgaria represent important stratigraphic markers and a potential source for oil and gas accumulation. Here, we present preliminary major and trace element results for 22 sedimentary rock samples from the Bachiishte, Ozirovo, and Etropole Formations collected from the Balkanides and the Moesian Platform in Central-northern and Northwestern Bulgaria. The three studied formations have largely similar geochemical characteristics. The application of established geochemical proxies and comparison with recent and ancient sediments suggests that the samples were deposited in a shallow, high-energy environment with no water restriction. Eroding mafic to intermediate lithologies provided the sediment into the submerging Moesian Platform. Most redox-sensitive geochemical parameters suggest an overall oxygenated environment during sediment deposition, although specific samples show evidence for periodically dysoxic or anoxic water column conditions.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48876790","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: 1
Characteristics and features of the hydrochemical regime of groundwater in the upper Pontian aquifer, Northwest Bulgaria 保加利亚西北部Pontian含水层上部地下水水化学状态的特征和特征
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.267
Aglaida Toteva, S. Tsakovski
{"title":"Characteristics and features of the hydrochemical regime of groundwater \u0000in the upper Pontian aquifer, Northwest Bulgaria","authors":"Aglaida Toteva, S. Tsakovski","doi":"10.52215/rev.bgs.2022.83.3.267","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.267","url":null,"abstract":"Spatial and seasonal changes in the chemical composition of groundwater in the upper Pontian aquifer have been monitored. The results of the monitoring and the changes of the chemical parameters over time were evaluated based on GIS and statistical processing of the data.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46258146","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
Cambrian magmatism in the Vlahina Mt. (SW Bulgaria) – correlation with the Vertiskos Unit (Serbo-Macedonian Massif) 弗拉希纳山（保加利亚西南部）的寒武纪岩浆活动——与Vertiskos单元（Serbo Macedonian Massif）的相关性
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.2.41
P. Machev, Lyubomirka Macheva, J. Plotkina, Е.V. Salnikova, M. Stifeeva, Irena Peycheva
{"title":"Cambrian magmatism in the Vlahina Mt. (SW Bulgaria) – correlation \u0000with the Vertiskos Unit (Serbo-Macedonian Massif)","authors":"P. Machev, Lyubomirka Macheva, J. Plotkina, Е.V. Salnikova, M. Stifeeva, Irena Peycheva","doi":"10.52215/rev.bgs.2022.83.2.41","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.2.41","url":null,"abstract":"The Rhodope massif and the Kraishte Zone are parts of the Internal Balkanides separated by Gabrovdol detachment. In the most southwestern part of Bulgaria one of the units of the Serbo-Macedonian Massif (the western part of the Rhodope Massif) the Vertiskos Unit crops out. Part of this unit represented by metagabbro-metadiorites is exposed in an area of about 60 km2 in the central part of the Vlahina Mountain. These rocks are metamorphosed at lower amphibolite facies conditions (T = 630–670 °C and P = 0.85–1.05 GPa). LA-ICP-MS U-Pb dating of zircons display concordant age of these rocks of 541±2.6 Ma. The petrological and isotopic investigations show significant differences with the rocks of the Vertiskos Unit and allow us to assign these rocks to the basement of the Kraishte zone (Struma Unit).","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44419236","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
Long-term monitoring of recent crustal movements in the region of Southwestern Bulgaria. Results from 2022 保加利亚西南部地区近期地壳运动的长期监测。2022年的结果
IF 0.2
Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI: 10.52215/rev.bgs.2022.83.3.293
N. Dimitrov, R. Nakov
{"title":"Long-term monitoring of recent crustal movements in the region of Southwestern Bulgaria. Results from 2022","authors":"N. Dimitrov, R. Nakov","doi":"10.52215/rev.bgs.2022.83.3.293","DOIUrl":"https://doi.org/10.52215/rev.bgs.2022.83.3.293","url":null,"abstract":"This article examines the study of modern crustal movements in the region of southwestern Bulgaria, a geologically and seismically active region with the presence of numerous fault structures. The main method of obtaining deformation information is by using GNSS measurements. The monitoring of geodynamic processes in the area has been going on for more than 25 years. GNSS data obtained from periodic campaign measurements between 1997 and 2022 are processed and analyzed to obtain the deformation accumulation result in southwestern Bulgaria. As a result of long-term measurements, more and more accurate and reliable results are obtained for the velocities of the points. A certain relationship has been established between the modern movements of the Earth’s crust, seismic events and tectonic structures. This extensive movement of southern Bulgaria and northern Greece is also confirmed. The results can be used for a detailed geodynamic and geological study of the active fault structures in the area.","PeriodicalId":40733,"journal":{"name":"Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43447642","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: 1
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