scholarly journals Early diagenesis driven by widespread meteoric infiltration of a Central European carbonate ramp: A reinterpretation of the Upper Muschelkalk

2017 ◽  
Vol 362 ◽  
pp. 37-52 ◽  
Author(s):  
Arthur Adams ◽  
Larryn W. Diamond
2003 ◽  
Vol 174 (6) ◽  
pp. 595-601 ◽  
Author(s):  
Bernard Courtinat ◽  
Fabrice Malartre

Abstract This study analyses variations in the size of black woody phytoclast and palynofacies types of shallow subtidal environments evolving to deeper subtidal environments, of latest Illyrdian-latest Fassanian age (Upper Muschelkalk). Some of the results display some discrepancies between elevated particle sizes that were supposedly deposited in a relative proximal source and the rich veryhachid palynofacies that are thought to represent distal marine environments. A case study of the succession in the Héming quarry, located in the Alsace-Lorraine trough (southwestern part of the intracratonic Germanic basin) reveals that : (1) the palynological assemblages are dominated by acritarchs belonging to micrhystridids, disaccate pollen and woody phytoclasts; (2) the abundance of phytoclasts, sporomorphs and marine groups is not correlated with lithologies; (3) the length of the processes of micrhystridids is not a useful parameter in defining palynofacies types. In carbonate ramp environments, many factors could have confused the palynological signals such as high-energy events and the water level on which the nutrient supply depended pro parte. All these factors seem to have been governed by climatic or tectono-eustatic events.


2015 ◽  
Vol 135 ◽  
pp. 1-27 ◽  
Author(s):  
M. Franz ◽  
S.I. Kaiser ◽  
J. Fischer ◽  
C. Heunisch ◽  
E. Kustatscher ◽  
...  

2004 ◽  
Vol 83 (1) ◽  
pp. 1-15 ◽  
Author(s):  
M. C. Pöppelreiter ◽  
A. Simone ◽  
G. Hoetz

AbstractThe Upper Muschelkalk is an unusual reservoir in NW Europe, producing only in the Coevorden Muschelkalk field, onshore the Netherlands. Origin and nature of the gas producing intervals were poorly known. The objective of the paper is to provide a comprehensive description of facies, cyclicity and petrophysical characteristics. From this description a depositional and sequence stratigraphic model is proposed, which explains why there is gas production only from certain intervals of the sequence. Our investigation is based on seismic, core and open hole log data. It indicates that the reservoir consists of dolomites, which are either muddy lagoonal to sabkha, or grainy backshoal deposits. The best reservoir quality is encountered in peloidal-oolitic packstones to grainstones. These represent storm-dominated backshoal deposits and constitute the inner part of a homoclinal carbonate ramp. The succession shows a conspicuous hierarchical cyclicity. Porous backshoal deposits form during maximum transgression and early regression. However permeable, gas producing backshoal deposits only occur in the upper 15 to 20 m, which forms the large-scale regressive hemi-cycle of the Upper Muschelkalk. Better reservoir quality in the upper hemi-cycle is due to changes in grain type and early diagenesis. The investigation might serve as calibration point for further exploring the Upper Muschelkalk reservoir and its facies pattern in the NW European basin.


Even though tick-borne encephalitis (TBE) has been a notifiable disease in Croatia since 2007, there are no or only limited data available on the occurring tick species in the endemic areas, on the prevalence of TBE virus (TBEV) in ticks, its distribution in Croatia, and its genetic characteristics. Reporting of human cases also is very scarce. The Central European subtype of virus (TBEV-EU) appears to be present in Croatia


2004 ◽  
Vol 54 (2) ◽  
pp. 249-255
Author(s):  
Merdan Halilov ◽  
Zdenek Kudrna ◽  
Judit Kapás

[Book reviews] Winiecki, J.: Transition Economies and Foreign Trade. London and New York: Routledge, 2002, 150 pp.; Olson, M.: Power and Prosperity: Outgrowing Communist and Capitalist Dictatorship. New York: Basic Books, 2000, 233 pp.; Krizsán, A. - Zentai, V. (eds): Reshaping Globalization - Multilateral Dialogues and New Initiatives. Budapest: Central European University Press, 2003, 327 pp.


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