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Porosity structure of Icelandic basalt 冰岛玄武岩的孔隙结构
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.2002.1.03
Ó. Sigurdsson, V. Stefansson
{"title":"Porosity structure of Icelandic basalt","authors":"Ó. Sigurdsson, V. Stefansson","doi":"10.3176/geol.2002.1.03","DOIUrl":"https://doi.org/10.3176/geol.2002.1.03","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"47 24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129003520","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: 6
HOLOCENE ENVIRONMENTAL EVENTS IN THE VIITNA AREA, NORTH ESTONIA 爱沙尼亚北部viitna地区全新世环境事件
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.1998.1.03
L. Saarse, A. Poska, E. Kaup, A. Heinsalu
{"title":"HOLOCENE ENVIRONMENTAL EVENTS IN THE VIITNA AREA, NORTH ESTONIA","authors":"L. Saarse, A. Poska, E. Kaup, A. Heinsalu","doi":"10.3176/geol.1998.1.03","DOIUrl":"https://doi.org/10.3176/geol.1998.1.03","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124635855","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: 17
DOLOMITES OF THE MUHU FORMATION (SILURIAN) IN MAINLAND ESTONIA - ASPECTS OF DOLOMITIZATION, PROPERTIES, AND PROSPECTS OF UTILIZATION 爱沙尼亚大陆木湖组(志留系)白云岩——白云化、性质及利用前景
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.1999.4.02
A. Teedumäe, T. Kiipli, T. Kallaste
{"title":"DOLOMITES OF THE MUHU FORMATION (SILURIAN) IN MAINLAND ESTONIA - ASPECTS OF DOLOMITIZATION, PROPERTIES, AND PROSPECTS OF UTILIZATION","authors":"A. Teedumäe, T. Kiipli, T. Kallaste","doi":"10.3176/geol.1999.4.02","DOIUrl":"https://doi.org/10.3176/geol.1999.4.02","url":null,"abstract":". In mainland Estonia the Muhu Formation of the Jaagarahu Stage (Silurian, Wenlock) is represented by secondary dolomites (dolostones) originating from the normal-marine calcareous sediments of the shoal facies belt of the palaeobasin. Five rock types, reef, breccia, microcrystalline, low-argillaceous, and argillaceous dolomites, differing in the lithological composition, properties, and possible fields of use, are distinguished. The chemical composition ofdolomites exhibits close to ideal molar proportions of Ca and Mg for all above-mentioned types of dolomites. The results of the X-ray diffraction study show that dolomites are nearly stoichiometric, with d,,, equalling 2.8850-2.8856 А. The dolomites studied represent the most completely and evenly dolomitized part of the extensive body of pervasive Silurian dolomites.","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129904338","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: 2
HYDROXYAPATITE VARIETIES IN RECENT FISH SCALES 近代鱼鳞中羟基磷灰石的变化
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.1997.4.03
J. Nemliher, T. Kallaste, I. Puura
{"title":"HYDROXYAPATITE VARIETIES IN RECENT FISH SCALES","authors":"J. Nemliher, T. Kallaste, I. Puura","doi":"10.3176/geol.1997.4.03","DOIUrl":"https://doi.org/10.3176/geol.1997.4.03","url":null,"abstract":". Mineralogy of apatite in the scales of Recent sharks, rays, and teleosts was studied using X-ray diffraction analysis. All the studied fish scales are composed of hydroxyapatite with different lattice parameters. The apatite in the scales ofRecent rays and teleosts has lattice parameters within the range of a=9.44-9.46 апа с = 6.87-6.88, which is comparable to the apatite in Recent vertebrate bones. The shark scale apatite has lattice parameters a = 9.40-9.41 and c = 6.87-6.88, closer to the apatite in Recent lingulate brachiopod shells. The distinct lattice parameters reflect differences in the chemical composition, first of all, in the content of hydroxyl, fluorine, and carbonate anions. These differences between the higher taxa of Recent fishes are significant from an evolutionary perspective and have implications to the interpretation of the mineralogy of fossil vertebrate skeletons.","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127010919","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: 2
GEOLOGICAL BACKGROUND OF THE PRESENT REGIONAL UPLIFT ANOMALY IN ESTONIA 爱沙尼亚当前区域隆起异常的地质背景
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.1994.2.02
A. Miidel
{"title":"GEOLOGICAL BACKGROUND OF THE PRESENT REGIONAL UPLIFT ANOMALY IN ESTONIA","authors":"A. Miidel","doi":"10.3176/geol.1994.2.02","DOIUrl":"https://doi.org/10.3176/geol.1994.2.02","url":null,"abstract":". It has been ascertained that the regional upliit anomaly which was established by Svensson (1989","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129284577","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: 5
РЕГРЕССИОННЫЙ АНАЛИЗ В ЭКСПОНЕНЦИАЛЬНОЙ МОДЕЛИ ФОРМИРОВАНИЯ ПАЛЕОДОЗЫ 旧石器时代指数形成模型的回归分析
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.1990.3.06
G. Hütt, V. Polyakov
{"title":"РЕГРЕССИОННЫЙ АНАЛИЗ В ЭКСПОНЕНЦИАЛЬНОЙ МОДЕЛИ ФОРМИРОВАНИЯ ПАЛЕОДОЗЫ","authors":"G. Hütt, V. Polyakov","doi":"10.3176/geol.1990.3.06","DOIUrl":"https://doi.org/10.3176/geol.1990.3.06","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123822070","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
ПОГРАНИЧНЫЕ КЕМБРО-ОРДОВИКСКИЕ ОТЛОЖЕНИЯ РАЗРЕЗА САКА П В СЕВЕРО-ВОСТОЧНОЙ ЭСТОНИИ 爱沙尼亚东北部saka p切口边缘沉积
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.1991.1.02
H. Heinsalu, I. Paalits, V. Viira
{"title":"ПОГРАНИЧНЫЕ КЕМБРО-ОРДОВИКСКИЕ ОТЛОЖЕНИЯ РАЗРЕЗА САКА П В СЕВЕРО-ВОСТОЧНОЙ ЭСТОНИИ","authors":"H. Heinsalu, I. Paalits, V. Viira","doi":"10.3176/geol.1991.1.02","DOIUrl":"https://doi.org/10.3176/geol.1991.1.02","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"7 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120824619","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
CARBON ISOTOPIC COMPOSITION OF LLANDOVERY ROCKS (EAST BALTIC SILURIAN) WITH ENVIRONMENTAL INTERPRETATION 东波罗的海志留系陆相岩碳同位素组成及其环境解释
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.2000.4.02
D. Kaljo, T. Martma
{"title":"CARBON ISOTOPIC COMPOSITION OF LLANDOVERY ROCKS (EAST BALTIC SILURIAN) WITH ENVIRONMENTAL INTERPRETATION","authors":"D. Kaljo, T. Martma","doi":"10.3176/geol.2000.4.02","DOIUrl":"https://doi.org/10.3176/geol.2000.4.02","url":null,"abstract":". Carbon isotope data fromsix borehole sections ofEstonia and West Latvia are presented and analysed against different geological and palaeontological phenomena in order to understand possible reasons for shifts in B'°C values. Four most important carbon isotopic events are established -in the Llandovery (from bottom): (1) a negative shift (-0.5 to —1.5%0) in the Coronograptus cyphus Zone (in the Pusku Beds), (2) a positive excursion (+3.0 to +4.0%0) in the Demirastrites triangulatus Zone (Ikla Member), (3) a negative excursion (—1.3 to —1.4%0) in the Stimulograptus sedgwickii Zone (Rumba Formation), (4) a small positive shift at the beginning of the Velise Formation in the Spirograptus guerichi-Streptograptus crispus Zone. The positive excursions seem to correspond to certain glacial events, negative ones to humid climatic episodes with rising sea level. In the case of the Rumba Formation the influence of carbon with low 5С released due to volcanic activity in the late Aeronian is suggested. The background carbon isotope values are relatively stable during the Llandovery, showing some changes in correlation with facies and climate controlled stratigraphical units.","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121203813","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: 36
THE BILLINGEN AND VOLKHOV STAGES IN THE NORTHERN EAST BALTIC. DETAILED STRATIGRAPHY AND LITHOFACIES ZONATION 波罗的海东部北部的比林根和沃尔霍夫阶段。详细的地层和岩相分带
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.2000.1.01
L. Ainsaar, A. Dronov, T. Meidla, O. Tinn
{"title":"THE BILLINGEN AND VOLKHOV STAGES IN THE NORTHERN EAST BALTIC. DETAILED STRATIGRAPHY AND LITHOFACIES ZONATION","authors":"L. Ainsaar, A. Dronov, T. Meidla, O. Tinn","doi":"10.3176/geol.2000.1.01","DOIUrl":"https://doi.org/10.3176/geol.2000.1.01","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116309291","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: 13
БИОСТРАТИГРАФИЯ ПОГРАНИЧНЫХ ОТЛОЖЕНИЙ НИЖНЕГО И СРЕДНЕГО КЕМБРИЯ В ЛИТВЕ 立陶宛寒武纪下游和中部寒武纪生物地层
Proceedings of the Estonian Academy of Sciences. Geology Pub Date : 1900-01-01 DOI: 10.3176/geol.1991.4.03
T. Jankauskas
{"title":"БИОСТРАТИГРАФИЯ ПОГРАНИЧНЫХ ОТЛОЖЕНИЙ НИЖНЕГО И СРЕДНЕГО КЕМБРИЯ В ЛИТВЕ","authors":"T. Jankauskas","doi":"10.3176/geol.1991.4.03","DOIUrl":"https://doi.org/10.3176/geol.1991.4.03","url":null,"abstract":"","PeriodicalId":237994,"journal":{"name":"Proceedings of the Estonian Academy of Sciences. Geology","volume":"87 27 Pt 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126305480","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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