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Review of the Bulgarian Geological Society最新文献

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Calpionellid biostratigraphy and microfacies across the Tithonian/Berriasian boundary interval in the Western Fore-Balkan, Bulgaria 保加利亚西前巴尔干蒂通尼/白垩纪边界区间的钙钛矿生物地层和微地层
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.193
S. Petrova, P. Andreeva, I. Lakova
{"title":"Calpionellid biostratigraphy and microfacies across the Tithonian/Berriasian boundary interval in the Western Fore-Balkan, Bulgaria","authors":"S. Petrova, P. Andreeva, I. Lakova","doi":"10.52215/rev.bgs.2023.84.3.193","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.193","url":null,"abstract":"The upper Tithonian and the lower Berriasian in the Western Fore-Balkan in Bulgaria (Gintsi and Glozhene Formations) represent a remarkable, stratigraphically expanded record of pelagic nodular and micritic limestones. More than 50 studied thin sections revealed the succession of the Chitinoidella, Praetintinnopsella, Crassicollaria, and Calpionella zones, further divided into subzones. The stratigraphical ranges of 22 chitinoidellid (the genera Almajella, Borziella, Carpathella, Chitinoidella, Daciella, Dobeniella, Longicollaria, and Praetintinnopsella) and 26 calpionellid species of the genera Tintinnopsella, Crassicollaria, Calpionella, Remaniella, Borzaiella and Lorenziella have been recorded. Eight microfacies, two of which in the Gintsi Formation, and six microfacies in the Glozhene Formation have been distinguished, all being wackestones and mudstones, characteristic of open-marine pelagic deposits and differing from each other in the prevailing bioclasts. The Tithonian/Berriasian boundary was tentatively drawn at the Crassicollaria/Calpionella boundary.","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":"139193378","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
Mafic adakite-like magmatism at the Cretaceous–Paleogene boundary from the Northwest Rhodopes, Bulgaria 保加利亚罗多彼山脉西北部白垩纪-古近纪交界处的黑云母类金刚岩浆活动
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.81
P. Filipov
{"title":"Mafic adakite-like magmatism at the Cretaceous–Paleogene boundary from the Northwest Rhodopes, Bulgaria","authors":"P. Filipov","doi":"10.52215/rev.bgs.2023.84.3.81","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.81","url":null,"abstract":"New findings of monzogabbro and gabbro-monzodiorite dykes aged 62 Ma reveal the existence of magmatism in the gap between termination of the Late Cretaceous subduction-related and start of the early–middle Eocene post-collisional magmatic stages in the Rhodope Massif. Their geochemical compositions strongly resemble adakitic signature as well as hornblende and epidote geobarometers predicted lower crustal conditions (20–30 km depth) of crystallization. Detailed studies on U-Pb geochronology of zircon populations and Sr-Nd-Hf isotopic compositions point to significant assimilation of the local basement and mixing of mantle-crust sources in the regime of a thickened crust.","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":"139195002","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 Bessarabian (Sarmatian) reef buildup between the village of Tyulenovo and Cape Shabla (Northeastern Bulgaria) as climatic and paleoecological indicator 作为气候和古生态指标的 Tyulenovo 村和沙卜拉角（保加利亚东北部）之间的贝萨拉比亚（萨尔马特）暗礁堆积层
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.181
E. Koleva-Rekalova
{"title":"The Bessarabian (Sarmatian) reef buildup between the village of Tyulenovo and Cape Shabla (Northeastern Bulgaria) as climatic and paleoecological indicator","authors":"E. Koleva-Rekalova","doi":"10.52215/rev.bgs.2023.84.3.181","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.181","url":null,"abstract":"The Bessarabian (Sarmatian) limestones composed mainly of endemic foraminifera Nubicularia novorossica are studied in detail in three sections between the village of Tyulenovo and Cape Shabla (Northeastern Bulgaria). An important reef buildup found in the upper levels of the sections allows to reconstruct the climatic and paleoenvironmental conditions. The most prominent changes are а shift from subtropical to drier climate and increased wave activity. This led to a decrease in the amount of Nubicularia novorossica and an increase in encrusting organisms such as encrusting nubicularia, bryozoans and red algae, which protected the newly formed sediments from destruction by the strong wave disturbance. The occurrence of less favorable climatic conditions is also evidenced by the presence of microbial micrite masses in the reef limestones.","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":"139188212","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
Cetacean and hipparion fossils from the upper Miocene near General Marinovo Village, NW Bulgaria 保加利亚西北部 General Marinovo 村附近上新世的鲸类和河马化石
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.177
L. Hristova, D. Dochev, L. Metodiev, Vladimir Nikolov
{"title":"Cetacean and hipparion fossils from the upper Miocene near General Marinovo Village, NW Bulgaria","authors":"L. Hristova, D. Dochev, L. Metodiev, Vladimir Nikolov","doi":"10.52215/rev.bgs.2023.84.3.177","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.177","url":null,"abstract":"The fossils of cetaceans are common in the Miocene marine deposits of North Bulgaria and along the Black Sea coast, however, they had received little attention until now. We report on abundant whale fossil material from the area near General Marinovo Village, NW Bulgaria. The finding of a hipparion tooth in the same area as the rest of the material implies a late Miocene age for the fossils. Taphonomical, XRD, and palaeohistological analyses reveal details about the pre-burial history and palaeobiology of part of the studied cetacean fossils.","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":"139188240","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
Modern morphodynamic processes and deposits in Western Srednogorie and Kraishte 西斯雷德诺戈里和克拉伊什特的现代形态动力学过程和矿床
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.345
Radostina Rizova, Dimitar Sachkov, V. Sachanski
{"title":"Modern morphodynamic processes and deposits in Western Srednogorie and Kraishte","authors":"Radostina Rizova, Dimitar Sachkov, V. Sachanski","doi":"10.52215/rev.bgs.2023.84.3.345","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.345","url":null,"abstract":"The present paper addresses investigation of modern morphodynamic processes, which lead to relief modelling on one hand and the formation of new landforms and deposits on the other. Erosional, denudational and gravitational landforms and deposits were observed in three key areas in the Zavalska Mountain (Western Srednogorie), Strazha and Lyubash (Kraishte). The aim of this study is to trace the intensity of exogenous landforming processes, to characterize the deposits and elucidate the connection between the geological base, the topography and the local hydroclimatic conditions for their genesis and dynamics. To achieve this goal, field and laboratory methods were employed, as well as data from an automatic weather station in the territory of the Breznik Municipality. Despite the short observation period of three months, the data reveal significant dynamics, rendering the selected study areas interesting for future research.","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":"139190823","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 review of depositional ages of the metasedimentary rocks in the units of the eastern Circum-Rhodope belt, Bulgaria-Greece 保加利亚-希腊环罗多坡带东部单元中的变质岩沉积年代综述
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.147
N. Bonev, P. Filipov
{"title":"A review of depositional ages of the metasedimentary rocks in the units of the eastern Circum-Rhodope belt, Bulgaria-Greece","authors":"N. Bonev, P. Filipov","doi":"10.52215/rev.bgs.2023.84.3.147","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.147","url":null,"abstract":"The Circum-Rhodope belt is a major tectonic unit in the Alpine orogen of northern Aegean region, which consists of metasedimentary rocks and unmetamorphosed arc-related Jurassic Evros ophiolite. Here, we review the biostratigraphic and detrital zircon ages available for the distinct units of the eastern Circum-Rhodope belt in Bulgaria and Greece. Both, biostratigraphic and radiometric ages consistently reveal a Middle Triassic to latest Late Jurassic timing of the sedimentation. Most importantly, the continuous depositional record sketches sedimentary sources from the continental margin (Rhodope) and the Jurassic arc system (Evros ophiolite) as documented mostly by the detrital zircons in clastic successions.","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":"139192359","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
Archaeoseismological study in northeastern Bulgaria: Islands in Durankulak Lake 保加利亚东北部的考古地震学研究：杜兰库拉克湖中的岛屿
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.359
Andrei Korzhenkov, Aleksandr Ovsyuchenko, O. Dimitrov, Todor Dimov, A. Larkov, B. Ranguelov, Nikolay Dobrev
{"title":"Archaeoseismological study in northeastern Bulgaria: Islands in Durankulak Lake","authors":"Andrei Korzhenkov, Aleksandr Ovsyuchenko, O. Dimitrov, Todor Dimov, A. Larkov, B. Ranguelov, Nikolay Dobrev","doi":"10.52215/rev.bgs.2023.84.3.359","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.359","url":null,"abstract":"The most northeastern part of the territory of Bulgaria is characterized by high seismicity. In 2019, archeoseismological studies of traces of strong earthquakes were carried out in the oldest architectural monument in Europe – Durankulak. There are reports of earthquakes in these places in the Middle Ages and in Аntiquity, but the data on the location of their foci is unspecified. Therefore, a team of scientists from Bulgaria and Russia carried out special scientific research on the islands in Lake Durankulak. A large number of artifacts have been found on the Big Island. The ruins located there are very old and have fixed traces of seismic impacts that have occurred over a long period of time. As a result of paleoseismological and archaeoseismological studies, three major earthquakes have been identified. Most likely, the focus of the first is connected to the Intramysian fault, and the focus of the second and third to the Shabla-Kaliakra seismic zone. The first was between VIII and IX degree on the scale of MSK 64, the second between IX and X, the third also between VIII and IX degree on the same scale.","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":"139193064","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
Duration of ammonite zones and characteristic Jurassic fossil taxa from the Pliensbachian–Aalenian successions of Bulgaria 保加利亚Pliensbachian-Aalenian岩层中的鹦鹉螺区和侏罗纪特征化石类群的持续时间
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.185
L. Metodiev, D. Dochev, Milena Georgieva, Tania Stoylkova, E. Koleva-Rekalova, Iliya Dimitrov, I. Savov
{"title":"Duration of ammonite zones and characteristic Jurassic fossil taxa from the Pliensbachian–Aalenian successions of Bulgaria","authors":"L. Metodiev, D. Dochev, Milena Georgieva, Tania Stoylkova, E. Koleva-Rekalova, Iliya Dimitrov, I. Savov","doi":"10.52215/rev.bgs.2023.84.3.185","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.185","url":null,"abstract":"The relative durations of ammonite biozones and selected ammonite taxa, as well as some bioevents associated with coeval Lower–Middle Jurassic benthic taxa are represented herein. Based on linked Sr-isotope data, we found a notable difference in the time spans of the zones and in the relative longevity of the guiding ammonite genera around the Pliensbachian/Toarcian (P/T) boundary. The last occurrences of the well-known late Pliensbachian bivalve taxa Gryphaea gigantea and Pseudopecten aequivalvis were dated at 184 Ma and 183.8 Ma, respectively. Recently defined Toarcian–Aalenian autochtonous brachiopod taxa (Bulgariarhynchia and Capillirhynchia brezenensis) were found to have significant taxonomic durations (2 Ma and 5 Ma). The Sr-isotope data also revealed ~2 Ma duration of seawater warming and 0.2 Ma fossil hiatus around the P/T boundary.","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":"139195578","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
Posušje bauxites in Bosnia and Herzegovina: A source of critical raw materials and a paleoclimatic marker 波斯尼亚和黑塞哥维那的 Posušje 铝土矿：关键原材料的来源和古气候标记
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.133
I. Peytcheva, Šime Bilić, Stoyan Georgiev, Ivica Pavičić, F. Šumanovac, A. Hikov, Marko Holma, M. Guillong, Ivan Grubišić
{"title":"Posušje bauxites in Bosnia and Herzegovina: A source of critical raw materials and a paleoclimatic marker","authors":"I. Peytcheva, Šime Bilić, Stoyan Georgiev, Ivica Pavičić, F. Šumanovac, A. Hikov, Marko Holma, M. Guillong, Ivan Grubišić","doi":"10.52215/rev.bgs.2023.84.3.133","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.133","url":null,"abstract":"The present study provides geochemical and geochronological data about Posušje bauxites in Bosnia and Herzegovina with the aim to characterize them as Critical Raw Materials (CRMs) sources and to put constraints on the time and genesis of the deposit. Boehmite is the bauxites’ main Al-bearing mineral, while gibbsite is a minor constituent. Hematite is the dominant Fe-phase, whereas goethite is rare. The chemical analyses indicate that the Al2O3 content ranges from 49.6 to 63.0 wt %, Fe2O3 varies from 16.5 to 33.7 wt % and the SiO2 content is usually <0.5 wt %. TiO2 content ranges between 2.6 and 3.2 wt %. Typical trace elements are V (353–787 ppm), Cr (498–1055 ppm), Zr (382–558 ppm), Sc (42–72 ppm), and Ga (40–47 ppm). The sum of REEs is 357–1112 ppm. The U-Pb zircon dating indicates an age of Posušje bauxite formation at 56.6±0.5 Ma. This age closely aligns with the global climatic event that occurred approximately 56 Ma ago, called Paleocene–Eocene Thermal Maximum (PETM).","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":"139188249","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
Contemporary trends and interactive forms of presentation of the museums at the University of Mining and Geology “St. Ivan Rilski” 圣伊万-里尔斯基 "矿业地质大学博物馆的当代趋势和互动展示形式
Review of the Bulgarian Geological Society Pub Date : 2023-12-01 DOI: 10.52215/rev.bgs.2023.84.3.363
Elitsa Zareva, Kameliya Marinova
{"title":"Contemporary trends and interactive forms of presentation of the museums at the University of Mining and Geology “St. Ivan Rilski”","authors":"Elitsa Zareva, Kameliya Marinova","doi":"10.52215/rev.bgs.2023.84.3.363","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.363","url":null,"abstract":"Information guide was created within the framework of a project for artistic and creative activity in the field of science. Its purpose is to present the museums at University of Mining and Geology „St. Ivan Rilski“ – Museum of Unique Crystals “Ilia Deleff”, Museum of Geology and Paleontology, Museum of Mineralogy, Petrography and Resources and Museum of Physics. in a modern and attractive way, accessible to a wide range of people. The guide has a direct connection with the virtual tours of the four museums of the university developed in a previous project, through which the audience gets to know the exhibits in the museums from a distance.","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":"139188265","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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