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Wyświetlanie 1-4 z 4
Tytuł:
Tadeusz Depciuch : pionier badań geochronologicznych w Polsce
Tadeusz Depciuch : pioneer of geochronological studies in Poland
Autorzy:
Miecznik, J. B.
Powiązania:
https://bibliotekanauki.pl/articles/2075103.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
K-Ar geochronology
Sudetes
NE Poland
uranium deposits
geochronologia
Sudety
Polska
złoża uranu
Opis:
Dr Tadeusz Depciuch (1928–2007), geochemist, mineralogist and economic geologist, longtime employee of the Polish Geological Institute in Warsaw, as the first scientist in Poland who conducted a systematic study on isotopic age of crystalline rocks. In 1966, after preliminary age determinations by Dr Jerzy Borucki, he undertook research of crystalline rocks of the Lower Silesian Block, mainly granites, and subsequently of rocks of the basement of the Polish part of the East European Precambrian Platform penetrated in the 1960s and 1970s, as well as igneous rocks of its cover. He used the K-Ar method, applying its volumetric variety on own-designed equipment. Age determinations allowed identifying the magmatic and metamorphic stages of the development of the crystalline basement evolution, and establishing the stratigraphy. They also played an important role in the research on Variscan plutonism in Lower Silesia. Tadeusz Depciuch participated in prospecting for uranium deposits in the Sudetes, using geochemical methods, and studied the origin of some deposits. In 1974–1984, he worked in Africa (Benin) as a UN expert in the field of geochemistry and economic geology.
Źródło:
Przegląd Geologiczny; 2014, 62, 10/1; 503--509
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palynology of the Palaeogene and Neogene from the Warmia and Mazury areas (NE Poland)
Autorzy:
Słodkowska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/94259.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
pollen
spres
dinocysts
palynostratigraphy
Palaeogene
Neogene
NE Poland
pyłki roślinne
dinocysty
Polska
paleogen
neogen
Opis:
Pollen, phytoplankton and microfauna from the Palaeogene and Neogene of two boreholes in NE Poland have been studied. Borehole Klucznik 1 is located in the Warmia area, and borehole Sąpłaty 3 borehole in the Mazury area. The oldest palynomorph assemblage comes from the Klucznik sediments; it consists of phytoplankton from the Early Palaeocene (Danian) D1 and D2 dinocyst zone, and from the Selandian D3 zone. The Eocene is present in the both the Klucznik and the Sąpłaty successions. The Middle Eocene assemblage has been dated as late Bartonian and belongs to the D11 dinocyst zone. The Late Eocene (Priabonian) D12 dinocyst zone is also present in both boreholes. Sporomorphs of a Late Eocene palynomorph assemblage point on the proximity of land and on terrestrial vegetation. The dinocyst zone D13, characteristic for the earliest Oligocene (‘Latdorfian’) has been found in both profiles as well. A Neogene sporomorph assemblage dating from the Middle Miocene (Early Serravallian) occurs only in the Sąpłaty profile. This sporomorph assemblage is correlated with pollen zone VIII. Pollen zone IX is present in the uppermost part of the Middle Miocene (Middle Serravallian). Late Miocene deposits (Late Tortonian) with pollen zone XI are present, too. The Miocene deposits accumulated in densely vegetated swamps, resulting now in the occurrence of lignite. The sedimentary conditions in the Warmia and Mazury regions were identical during the Neogene and Palaeogene, implying that both provinces belonged at the time to one sedimentary basin.
Źródło:
Geologos; 2009, 15, No. 3-4; 219-234
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neotectonics induced by ice-sheet advances in NE Poland
Autorzy:
Morawski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/94706.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
neotectonics
glacioisostasy
glaciotectonics
geophysical investigations
Pleistocene
NE Poland
neotektonika
glaciizostazja
glacitektonika
badania geofizyczne
plejstocen
Polska
Opis:
Differences in the geological structure of the hard-rock substratum of the Warmia and Mazury regions (NE Poland) resulted during the Pleistocene in different reactions on the load exerted by the land-ice masses. In the (western) Warmia province, vertical glacio-isostatic movements caused cyclic erosional events affecting the relatively thick sedimentary cover, which became more compacted. In contrast, the thinner sedimentary cover of the rigid crystalline basement favoured quiet sedimentation in the (eastern) Mazury province. The zone in between these two areas runs NNE-SSW for some 80 km. It is several kilometres wide and is composed of landforms that owe their origin to the sedimentary infilling of crevasses. This intermediate zone formed an interlobe are between the two huge ice lobes that covered the Warmia and Mazury areas during the last ice age. The basement of the zone coincides with the crystalline craton slope, which is accompanied to the west by a parallel marginal trough. Cyclic advances and retreats of the Pleistocene ice sheet induced neotectonic mobility. Glacio-isostatic processes resulted in the intermediate zone in block movements (uplift and subsidence) that affected the whole Cenozoic succession, creating mainly vertical discontinuity zones. Glacio-isostasy also induced vertical tectonic movements within the older deposits, reaching down to the crystalline basement. A tectonic graben thus developed. It is bounded by flexures ac-companied on both sides by positive structures that may indicate transpressional movements with a strike-slip stress component.
Źródło:
Geologos; 2009, 15, No. 3-4; 199-217
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy istnieje mazurska, prawoskrętna strefa podatnego ścinania?
Does the Mazury dextral shear zone exist?
Autorzy:
Cymerman, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2074551.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
kompleks mazurski
Litwa
Polska
Mezoprotezoik
struktura
otwory
kinematyka
nasunięcia
ductile thrusting
structures
kinematics
boreholes
Mesoproterozoic
Masuria
NE Poland
SW Lithuania
Opis:
Throughout SW Fennoscandia, numerous approximately W-E trending faults and ductile shear zones have recently been recognized. The regiona--scale zone of strike-slip displacements [Mazury lineament] with a dextral component was referred by many authors as apparently influenced by the distribution of ca. 1.6-1.4 Ga old "anorogenic" intrusions of the Mazury Complex [NE Poland]. However, new detailed structural and kinematics studies of drill-cores from 255 boreholes located throughout NE Poland and SW Lithuania [Lazdijai region] indicate that the Mazury Complex, the Suwałki Anorthosite Massif and surrounding lithotectonic domains share a common ductile thrusting deformation, calling into question the concept of a large-scale dextral shear zone and also the "anorogenic" origin hypothesis of the Mazury Complex. One important advance has been the accumulation of structural and kinematics information that allows assessment of the main orogenic transport direction commonly towards the SW, locally to the NE [e.g., in the eastern part of the Suwałki Anorthosite Massif]. This assessment has been coupled with the recognition of the role of major and numerous ductile shear zones within the western part of the East European Platform. In general, compressional deformation with ductile thrusting predominated in the western part of the East European Platform. Very probable strike of regional mylonitic foliation [S1] from almost 100 boreholes has been established, based on geophysical measurements of the curvature of borehole axis and a few tens oriented core samples [SW Lithuania]. It is assumed that the crystalline rocks of NE Poland and SW Lithuania [Lazdijai region] were subjected to similar ductile thrusting to transpressional deformation during the late Gothian [or newly defined Dano-Polonian] orogeny [ca. 1.5 Ga].
Źródło:
Przegląd Geologiczny; 2007, 55, 2; 157-167
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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