This book shows the results of structural, compositional and evolutionary investigations of the Precambrian crust of the East European Craton in Lithuania and adjacent areas. This work contributes to the recognition of the platform basement, which remains weekly investigated worldwide, despite it encompassing the surfaces of cratons. It presents a methodological example of systematic studies of the covered platform basement, integrating petrological, geochemical, isotopic, and geophysical methods, as well as geological mapping, in order to present comprehensive geological picture of the subject matter. In a systematic and summarized form, factual data and intellectual material acquired by researchers are combined. Important papers and industrial reports (also written in Russian and Lithuanian) make this information accessible for both local and international scientists and practitioners and stimulate the advertising, application, and augmentation of this knowledge
Author(s): Gediminas Motuza
Series: Regional Geology Reviews
Publisher: Springer
Year: 2022
Language: English
Pages: 206
City: Cham
Contents
About the Author
Abbreviations
Abbreviations of the Grain Size
Names of the Boreholes
References
1 Introduction
2 Research History and the Sources of Information
Abstract
2.1 Drilling
2.1.1 Drilling for General Geological Investigation
2.1.2 Drilling for Geological Mapping
2.1.3 Drilling for Hydrogeological Purposes
2.1.4 Drilling for Oil Exploration
2.1.5 Drilling for the Exploration of Metal Ores
2.1.6 Drilling for Other Purposes
2.2 Exploration of the Potential Fields
2.3 Seismic Exploration
2.4 Magnetotelluric Investigations
2.5 Scientific Research
2.6 Geochronology
2.7 Exploration of Mineral Resources
2.8 Impact Craters
2.9 A General Methodology of this Study
References
3 The Structural Subdivision of the Crust
Abstract
References
4 Supracrustal Rocks of the Lithuanian-Belarus Belt
Abstract
4.1 Introduction
4.2 Felsic Paragneisses
4.2.1 Petrographic Characteristics
4.2.2 Geochemistry
4.3 Basic Metavolcanic Rocks
4.3.1 Petrological Characteristic
4.3.2 Geochemistry
4.4 Felsic Metavolcanic Rocks
4.4.1 The Admixture of Pyroclastic Material in Psammites
4.4.2 Metavolcanic Rocks in the Varėna Iron Ore Zone
4.4.3 Metavolcanic Rocks in the Lazdijai Band
4.5 Carbonate Rocks
4.6 Metamorphism in the LBB
4.7 The Age of the Supracrustal Rocks of the LBB
4.8 Supracrustal Rocks of the Zarasai Block
4.9 Conclusions
References
5 Felsic Metavolcanic Rocks of the Sūduva Suite
Abstract
5.1 Petrological Characteristic
5.2 Geochemistry
5.3 The Age of the Sūduva Suite
5.4 Conclusions
References
6 Supracrustal Rocks of the West Lithuanian Domain
Abstract
6.1 Petrological Characteristics
6.1.1 Metagreywacke (Ca-rich Gneisses)
6.1.2 Metapelite (Al-Rich Gneisses)
6.1.3 Metaarkose (Si-Rich Gneisses)
6.2 Geochemistry
6.3 Basic Supracrustal Rocks in the WLD
6.4 The Correlation of Supracrustals in the WLD and Västervik Area
6.5 The Age and Stratigraphy of the WLD Supracrustals
6.6 Comparison of Supracrustal Sequences in the WLD and the LBB
6.7 Conclusions
References
7 Synorogenic Intrusive Magmatism in the LBB
Abstract
7.1 Migmatites and Synorogenic Granitic Intrusions in the LBB
7.2 The Age of Synorogenic Granite in the LBB
7.3 The Randamonys Suite
7.4 Plutonic Synorogenic Magmatism in the Zarasai Block
References
8 The Varėna Suite
Abstract
8.1 General Characteristic
8.2 Petrological Characteristics
8.3 Metasomatic Alteration of the Varėna Suite and Host Rocks
8.4 Dolomite Rock
8.5 The Shape of the Bodies of the Varėna Suite
8.6 Discussion on the Genesis of the Varėna Suite
8.7 The Age of the Varėna Suite
8.8 Economic Aspects
8.9 Other Occurrences of Ultramafic Intrusive Rocks in the LBB
References
9 Synorogenic Plutonic Magmatism in the WLD
Abstract
9.1 Migmatites and Anatectic Granite
9.2 The Kuršiai Suite
9.2.1 General Characteristic
9.2.2 The Petrological Characteristics of the Charnockitic Rocks
9.2.3 The Geochemistry
9.2.4 Granitic Rocks of the Kuršiai Suite
9.2.5 Basic Enclaves in the Kuršiai Batholith
9.2.6 The Age of the Kuršiai Suite
9.2.7 Correlation of the Kuršiai and Askersund Suites
9.3 Basic Intrusive Rocks in the WLD
9.4 Conclusions
References
10 Postorogenic Intrusive Magmatism in the LBB
Abstract
10.1 AMCG-Type Magmatism
10.1.1 Petrology
10.1.2 Geochemistry
10.1.3 Chronology
10.1.4 Metallogenic Aspects
10.2 Minor Intrusions
10.2.1 Glassy Veins
10.2.2 Carbonate Veins
References
11 Post-orogenic Intrusive Magmatism in the WLD
Abstract
11.1 Initial Stages of Post-Orogenic Magmatism in the WLD
11.2 The Žemaičių Naumiestis Suite
11.2.1 The Petrological Characteristic
11.2.2 The Geochemistry
11.2.3 Chronology
11.3 Latest Manifestations of Magmatism
11.3.1 Basalt veins
11.3.2 Carboniferous and Permian Magmatism
References
12 Fault Tectonics
Abstract
12.1 General Paterns
12.2 Principal Shear Zones and Fault Systems in the WLD
12.2.1 General Characteristic
12.2.2 Petrological Characteristics of Fault Rocks in the TSZ
12.2.3 The Age of the TSZ
12.3 Principal Shear Zones and Fault Systems in the LBB
12.4 Fault Tectonics in the Zarasai Block
References
13 Tectonic Structure of the Crust
Abstract
13.1 The Deep Structure of the WLD
13.2 The Deep Structure of the LBB
13.3 The Structure of the MLSZ
References
14 Chronology of the Precambrian Events
Abstract
14.1 General Overview
14.2 Stratigraphy
14.3 The History of Magmatism
14.4 The Stages of Metamorphism
References
15 Formation and Evolution of the Crust
Abstract
15.1 Main Processes of the Formation of the Crust
15.2 The Regional Tectonic Context of the Precambrian Basement of Lithuania
15.3 Conclusions
References
