scholarly journals Petroleum generation and expulsion in the Lower Palaeozoic petroleum source rocks at the SW margin of the East European Craton (Poland)

2019 ◽  
Author(s):  
Dariusz Botor ◽  
Jan Golonka ◽  
Justyna Zając ◽  
Bartosz Papiernik ◽  
Piotr Guzy
Keyword(s):  
East European Craton ◽  
Source Rocks ◽  
East European ◽  
Petroleum Generation ◽  
Lower Palaeozoic

Seismic profile LT-7 (northwest Poland): geological implications

1997 ◽  
Vol 134 (5) ◽  
pp. 653-659 ◽  
Author(s):  
RYSZARD DADLEZ
Keyword(s):  
Layer Structure ◽  
Seismic Profile ◽  
Suture Zone ◽  
East European Craton ◽  
Significant Differentiation ◽  
East European ◽  
Crystalline Crust ◽  
Lower Palaeozoic ◽  
Geological Implications ◽  
Four Blocks

Crystalline crust examined along the seismic profile LT-7 is subdivided into four blocks separated by distinct vertical fractures. The northeastern block belongs to the East European Craton (Baltica). Its three-layer structure is similar to that of the Svecofennian crust farther to the northwest. The southeastern block reveals typical, two-layer Variscan crust. Both central blocks have a peculiar structure not comparable with the crust of the Danish and North German areas: two lower layers, with velocities identical or close to that of the cratonic lower and middle layers, are extremely thin, and an upper layer, 8–11 km thick, shows surprisingly low velocities. This upper layer probably represents the folded and weakly metamorphosed Lower Palaeozoic sequences, although the connection with undeformed epicratonic cover cannot be excluded. Significant differentiation of crustal types in different segments of the Trans-European Suture Zone favours the concept of tectonostratigraphic terranes which collided with Baltica.

Generation and origin of natural gas in Lower Palaeozoic shales from southern Sweden

1969 ◽  
pp. 37-40
Author(s):  
Niels Hemmingsen Schovsbo ◽  
Arne Thorshøj Nielsen
Keyword(s):  
Source Rocks ◽  
Southern Sweden ◽  
Hydrocarbon Gases ◽  
Biogenic Gas ◽  
South Central ◽  
Alum Shale ◽  
Marine Source ◽  
Lower Palaeozoic ◽  
Background Gas ◽  
Origin Of Natural Gas

The Lower Palaeozoic succession in Scandinavia includes several excellent marine source rocks notably the Alum Shale, the Dicellograptus shale and the Rastrites Shale that have been targets for shale gas exploration since 2008. We here report on samples of these source rocks from cored shallow scientific wells in southern Sweden. The samples contain both free and sorbed hydrocarbon gases with concentrations significantly above the background gas level. The gases consist of a mixture of thermogenic and bacterially derived gas. The latter likely derives from both carbonate reduction and methyl fermentation processes. The presence of both thermogenic and biogenic gas in the Lower Palaeozoic shales is in agreement with results from past and present exploration activities; thermogenic gas is a target in deeply buried, gas-mature shales in southernmost Sweden, Denmark and northern Poland, whereas biogenic gas is a target in shallow, immature-marginally mature shales in south central Sweden. We here document that biogenic gas signatures are present also in gas-mature shallow buried shales in Skåne in southernmost Sweden.

The East European craton at the end of the Paleoproterozoic: A new paleomagnetic pole of 1.79–1.75 Ga

2016 ◽  
Vol 71 (1) ◽  
pp. 8-17 ◽  
Author(s):  
N. V. Lubnina ◽  
A. M. Pasenko ◽  
M. A. Novikova ◽  
A. Yu. Bubnov
Keyword(s):  
East European Craton ◽  
East European ◽  
Paleomagnetic Pole
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