1 edition of Early Proterozoic of the Baltic Shield. found in the catalog.
Early Proterozoic of the Baltic Shield.
by Committee for Scientific and Technical Co-operation between Finland and the Soviet Union in Petrozavodsk
Written in English
|LC Classifications||QE 276.3 E12 1986|
|The Physical Object|
|Number of Pages||244|
The Baltic Shield is a segment of the Earth's crust belonging to the East European Craton, representing a large part of Fennoscandia, northwestern Russia and the northern Baltic Sea. It is composed mostly of Archean and Proterozoic gneisses and greenstone which have undergone numerous deformations through tectonic activity. The Baltic Sea is cold, but its history has often run red-hot, as historian Alan Palmer makes clear in his book "The Baltic." Palmer, a prolific, Oxford-educated British historian, wishes to give the 21st-century reader "A New History of the Region and Its People" (the book's subtitle).Cited by: 7.
The Baltic Sea is cold, but its history has often run red-hot, as historian Alan Palmer makes clear in his book The , a prolific, Oxford-educated British historian, wishes to give the 21st-century reader A New History of the Region and Its People (the books subtitle). He does so in a thorough and conscientious manner, covering the Baltic regions history from the earliest known /5. I n the past there was a perception that Proterozoic gold deposits were relatively small and unimportant (Hutchinson, ; Woodall, ).However, the contribution from Proterozoic gold deposits has increased significantly in the last ten years due to recent exploration success in regions such as Africa, South America, and northern Australia, together with historical production from areas.
The obtained [+ or -] 6 Ma magmatic crystallization age of the Velaiciai-2 granodiorite agrees well with the latest Palaeoproterozoic-early Mesoproterozoic extension of the crust and widespread AMCG and A-type granitoid magmatism in Estonia and Latvia as well as Finland and Sweden in the Baltic suggest that all these processes, including the development of the EW-trending. The motivation for this volume came from the idea that the Precambrian is the key, both to the present, and to the understanding of the Earth as a whole. The Precambrian constitutes about 85% of Earths history, and of that, about billion years of Precambrian time, represented by rocks, are accessible to geoscientists. Ancient atmospheric and environmental conditions can be traced back to.
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How to Cite. Rosen, O. M., Safronov, V. and Abbyasov, A. () Sedimentary Environment of the Amphibolite-Grade Early Proterozoic Keiva and Kukas Basins (North-East Baltic Shield): Normative Mineral MINLITH Analysis, in Precambrian Sedimentary Environments: A Modern Approach to Ancient Depositional Systems (eds W.
Altermann and P. Corcoran), Blackwell Publishing Ltd., Oxford, UK. Abstract. The Baltic Shield comprises lithologies ranging in age from to Ga in Finland, Norway, Sweden and the USSR (Figure ). The shield is zoned chronologically from NE (Archaean) to SW (mid to late Proterozoic).Cited by: 1.
This is the primary objective of this book. The book was conceived in order to provide a comprehensive review of the basic rocks produced during the first half of the Precambrian, i.e. the Archaean and early Proterozoic, to about Ga years ago. Two major questions are : R.P. Hall. Proterozoic terranes across the world show significant differences in accretion models.
A subduction-related horizontal accretion is suggested for the crust of North America and the Baltic shield, but a vertical accretion is favored for the Australian crust. A collisional orogeny is recorded in the north of the shield by a narrow belt of early Proterozoic crust separating two Archaean crustal segments.
In the central Baltic Shield, westward growth of continental crust occurred during the Svecokarelian (– Ga) and Gothian (– Ga) by: Sources of Early and Middle Proterozoic magmas in the Makkovik Province, Labrador: evidence from Nd isotape data/A. Kerr and B.J.
Fryer --Sr and Nd isotopic and petrological evidence for the age and origin of the White Bear Arm complex and associated units from the Grenville Province in eastern Labrador/S.A. Prevec, R.H. McNutt, and A.P.
Dickin. Arguments for subduction-related horizontal accretion during the mid-Proterozoic are presented for North America and the Baltic Shield while the Australian crust does not seem to fit such a pattern, and vertical accretion is favored there.
Precambrian Research, 45 () 63 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands Pechenga Ferropicrites and other Early Proterozoic Picrites in the Eastern Part of the Baltic Shield E.J. HANSKI Geological Survey of Finland, P.O. SF Rovaniemi (Finland) V.F.
SMOLKIN Geological Institute, Academy of Sciences of the U.S.S.R., SU Apatity (U.S.S Cited by: The Baltic Shield (or Fennoscandian Shield) is a segment of the Earth's crust belonging to the East European Craton, representing a large part of Fennoscandia, northwestern Russia and the northern Baltic is composed mostly of Archean and Proterozoic gneisses and greenstone which have undergone numerous deformations through tectonic activity.
It contains the oldest rocks of the European. Abstract. The granulite belt of Lapland is an intensely deformed and metamorphosed upthrust sequence of early Proterozoic pelitic to psammitic sediments and predominantly synmetamorphic basic to intermediate igneous rocks mainly of calc-alkaline by: During the Early Proterozoic ( to Ga), three types of coeval structural provinces developed in the eastern Baltic Shield—(1) the Karelian and Kola granite-greenstone cratons, (2) the.
Evidence for early Proterozoic plate tectonics from seismic reflection profiles in the Baltic shield Article (PDF Available) November with Reads How we measure 'reads'.
The East European Craton (EEC) is the core of the Baltica proto-plate and consists of three crustal regions/segments: Fennoscandia to the northwest, Volgo-Uralia to the east, and Sarmatia to the south. Fennoscandia includes the Baltic Shield (also referred to as the Fennoscandian Shield) and has a diversified accretionary Archaean and early Proterozoic crust, while Sarmatia has an older.
The book was conceived in order to provide a comprehensive review of the basic rocks produced during the first half of the Precambrian, i.e.
the Archaean and early Proterozoic, to about Ga years ago. In the Gulf of Bothnia, the Baltic Sea and the countries on the eastern and southern sides of the Baltic Sea, the Proterozoic bedrock of the Svecofennian Province continues underneath a cover of sedimentary rocks of Mesoproterozoic, Palaeozoic and in the south up to Tertiary age.
The Early Proterozoic orogens of North America, Greenland, and the Baltic Shield contain evidence of major accretion of new, and major reworking of older, continental crust (Fig.
1; Patchett and Arndt. Sedimentary Environment of the Amphibolite‐Grade Early Proterozoic Keiva and Kukas Basins (North‐East Baltic Shield): Normative Mineral MINLITH Analysis (Pages: ) O. Rosen; V. Safronov; A. Abbyasov.
This is the primary objective of this book. The book was conceived in order to provide a comprehensive review of the basic rocks produced during the first half of the Precambrian, i.e. the Archaean and early Proterozoic, to about Ga years ago.
Two major questions are addressed. 1 Introduction and Tectonic Setting. The Fennoscandian region in the centre of the Baltic Shield resulted from a series of tectonic processes which involved several episodes of crustal accretion over Ga (Gorbatschev & Bogdanova ).During the Proterozoic, the Archean terranes underwent fragmentation, reworking and reassemblage with belts of newly formed by: Proterozoic glaciations • Early Proterozoic glaciation to by - - tillites from Canada, United States, Australia, and South Africa • Late Proterozoic glaciation ("Varangian") to my "Snow Ball Earth" Critical effect of the Proterozoic glaciations on theevolution of the biosphere.
This book presents a short description of major geological structures in the region and is based on current geological-geochemical and geophysical data and interpretations. New versions of the Geological Map of the Kola Peninsula and some of its structures are given.Other articles where Baltic Shield is discussed: Arctic: Geology: The Baltic (or Scandinavian) Shield, centred on Finland, includes all of northern Scandinavia (except the Norwegian coast) and the northwestern corner of Russia.
The two other blocks are smaller. The Angaran Shield is exposed between the Khatanga and Lena rivers in north-central Siberia and the Aldan.Volume Issue1 November The RNA polymerases from T7 and related bacteriophages, in conjunction with elements of DNA and RNA viruses, can be used in novel ways for expression of.