The late jurassic ‘Massenkalk fazies’ of Southern Germany: calcareous sand piles rather than organic reefs

Koch, Roman; Senowbari‐Daryan, Baba; Strauss, Horst

doi:10.1007/bf02536939

Cited by 34 publications

(10 citation statements)

References 15 publications

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“…In some layers, they form densely packed, grain-supported fabrics showing moderate to well sorting. Similar problematical ''spherical particles'' were described by Koch et al (1994) from the Late Jurassic of the Franconian Alb associated with algal-sponge reef-complexes and interpreted as true ooids (with nuclei) or as possible ''in situ'' microbial-peloids (without nuclei; for microbial peloids see also Flügel 2004, Pl. 10/1).…”

Section: Peloids/ooidsmentioning

confidence: 94%

The occurrence and role of microencruster frameworks in Late Jurassic to Early Cretaceous platform margin deposits of the Northern Calcareous Alps (Austria)

Schlagintweit

Gawlick

2007

Facies

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Section: Peloids/ooidsmentioning

confidence: 94%

The occurrence and role of microencruster frameworks in Late Jurassic to Early Cretaceous platform margin deposits of the Northern Calcareous Alps (Austria)

Schlagintweit

Gawlick

2007

Facies

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“…These Upper Jurassic carbonates yield conspicuous sponge/microbial bioherms and have been subject to numerous investigations (e.g., Quenstedt 1858 ;Fischer 1913;Roll 1934;Gwinner 1962Gwinner , 1976Nitzopoulos 1974;Ziegler 1977;Ricken 1985;Koch and Schorr 1986;Koch and Schweizer 1986;Schmidt-Kaler 1989, 1990; Keupp et al 1990;Prestel 1990;Selg and Wagenplast 1990;Geyer and Gwinner 1991;Leinfelder 1993a;Koch et al 1994;Hantzpergue et al 1998;Reinhold 1998;Schauer 1998;Gygi 2000a, b;Schweigert 2000a, b;Baier and Schweigert 2001;Pawellek 2001;Pawellek andAigner 2002, 2003;Olivier et al 2004). However, due to the relatively uniform lithology and the lack of modern analogues, the factors controlling sedimentation and sponge/microbial bioherm development are not yet fully understood.…”

Section: Scope Of Studymentioning

confidence: 98%

A multi-proxy study of deeper-water carbonates (Upper Jurassic, southern Germany): combining sedimentology, chemostratigraphy and palynofacies

Ruf

Link

Pross

et al. 2005

Facies

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A multi-proxy study of deeper-water carbonates (Upper Jurassic, southern Germany): combining sedimentology, chemostratigraphy and palynofacies Abstract Deeper shelf carbonates are often composed of relatively monotonous successions with few diagnostic sedimentological characteristics. The Upper Jurassic of southern Germany provides a classical example for deeper ramp carbonate environments, dominated by limestone/marl sequences including conspicuous sponge/microbial bioherms. Sedimentological analysis was integrated with stable isotope (O, C) and palynofacies analysis in an attempt to reconstruct the dominant depositional controls (sea level, climate, nutrients) as well as to delineate genetic sequences and their stacking patterns. Small-scale (3-10 m thick), medium-scale (5-25 m thick) and large-scale (45-60 m thick) sequences could be recognised, which all share similar patterns and trends. Oxygen isotopes from bulk rock carbonate samples were interpreted as records of temperature trends which were related to climatically induced sea level fluctuations. A positive oxygen isotope trend (i.e., cooling and associated relative sea-level fall) in combination with increasing absolute palynoclast abundances (increasing proximality) are inferred to mark regressive hemi-sequences. Negative trends in oxygen isotopes (i.e., warming and associated relative sea-level rise) and a decrease in absolute palynoclast abundances (increasing distality) are interpreted to indicate transgressive hemi-sequences. In contrast to the smallscale sequences, the medium-scale sequences could be

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“…As a result of the high variability in its depositional environment ( Fig. 1b), sedimentary and diagenetic features as well as irregular fractures, faults, and locally intensive karstification, the aquifer properties are very heterogeneous throughout the basin (Koch et al 1994(Koch et al , 2010Koch 1997Koch , 2000Koch and Munnecke 2016;Mraz 2019;Niebuhr 2014;Stier and Prestel 1991). Therefore, petrophysical and hydraulic properties of the aquifer rock are presumed to be variable throughout this carbonate platform setting as well.…”

Section: Introductionmentioning

confidence: 99%

Porosity–permeability relationship derived from Upper Jurassic carbonate rock cores to assess the regional hydraulic matrix properties of the Malm reservoir in the South German Molasse Basin

Bohnsack¹,

Potten²,

Pfrang³

et al. 2020

Geotherm Energy

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For the successful realization and productivity prediction of new hydrothermal projects in the South German Molasse Basin, the hydraulic matrix properties of the Upper Jurassic Malm reservoir have to be determined as accurately as possible. To obtain specific information on the distribution of the petrophysical parameters (e.g., rock density, porosity, and permeability) 363 samples of rare drilling cores from the reservoir northeast of Munich (wells Moosburg SC4 and Dingolfing FB) were investigated using different experimental methods. Additionally, porosity was calculated by a downhole resistivity log of a nearby borehole close to Munich for comparison and the attempt of transferability of the data set to other locations within the Central Molasse Basin. Core data were divided into groups of different stratigraphic and petrographic units to cover the heterogeneity of the carbonate aquifer and provide data ranges to improve reservoir and prediction models. Data for effective porosity show a high variance from 0.3 to 19.2% throughout this heterogeneous aquifer. Permeability measured on core samples is scattered over several orders of magnitude (10 −4-10 2 mD). Permeability models based on the porosity-permeability relationship were used to estimate permeability for the whole aquifer section and identify possible flow zones. A newly developed empirical model based on distinct lithofacies types allows a permeability estimation with a deviation < 10 mD. However, fractured, karstified, and vuggy zones occurring in this typically karstified, fractured, and porous reservoir cannot yet be taken into account by the model and result in an underestimation of permeability on reservoir scale. Overall, the dominant permeability trends can be mapped well using this model. For the regional transfer and the correlation of the results, a core-related porosity/ permeability log for the reservoir was compiled for a well close to Munich showing similarities to the core investigations. The validation of the regional transferability of the parameter set to other locations in the Molasse Basin was carried out by correlation with the interpreted log data of a well near Munich.

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The late jurassic ‘Massenkalk fazies’ of Southern Germany: calcareous sand piles rather than organic reefs

Cited by 34 publications

References 15 publications

The occurrence and role of microencruster frameworks in Late Jurassic to Early Cretaceous platform margin deposits of the Northern Calcareous Alps (Austria)

The occurrence and role of microencruster frameworks in Late Jurassic to Early Cretaceous platform margin deposits of the Northern Calcareous Alps (Austria)

A multi-proxy study of deeper-water carbonates (Upper Jurassic, southern Germany): combining sedimentology, chemostratigraphy and palynofacies

Porosity–permeability relationship derived from Upper Jurassic carbonate rock cores to assess the regional hydraulic matrix properties of the Malm reservoir in the South German Molasse Basin

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