Sequence stratigraphy and cyclic development of Basal Zechstein carbonate-evaporite deposits with emphasis on Zechstein 2 off-platform carbonates (Upper Permian, Northeast Germany)

Strohmenger, Christian J.; Voigt, E.; Zimdars, Johannes

doi:10.1016/0037-0738(95)00058-5

Cited by 75 publications

(52 citation statements)

References 25 publications

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“…4). Two desiccation events, probably coinciding with the three intra-Ca2 cycles as proposed by Piske and Schretzenmayr (1984) and Strohmenger et al (1996) could be identified.…”

Section: Discussionmentioning

confidence: 91%

“…Similarly Strohmenger et al (1996) inferred Ca2-intracyclicity from sequence stratigraphic analyses of coastal Ca2 deposits from NE-Germany. Intra-Ca2-cyclicity is reflected by variation in organic matter composition over the entire A1-Ca2-A2 interval (Schwark et al 1997).…”

Section: Resultsmentioning

confidence: 99%

“…The inset shows a detailed map of Ca2 deposits in the Thuringian Basin after Strohmenger et al (1996). The position of core Jena 106 is indicated Finnigan MAT, Bremen, Germany) to an IRMS (Delta plus XL, Finnigan MAT, Bremen, Germany).…”

Section: Hydrogen Isotope Ratio Analyses Of Organic Compoundsmentioning

confidence: 99%

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Reconstruction of palaeohydrological conditions in a lagoon during the 2nd Zechstein cycle through simultaneous use of ?D values of individual n-alkanes and ?18O and ?13C values of carbonates

Sachse

Radke

Gaupp

et al. 2004

Int J Earth Sci (Geol Rundsch)

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For the first time d 18 O and d 13 C values from carbonates and dD values of individual n-alkanes were used to reconstruct palaeohydrological conditions in a lagoon at the southern margin of the Central European Zechstein Basin (CEZB). A 12-m core covering the complete Ca2 interval and adjacent anhydrites (A1 and A2) was analyzed for d 18 O and d 13 C values of dolomitized carbonates and dD values of individual n-alkanes. d 18 O carb values (+2‰ to +5‰ vs. VPDB) were strongly influenced by evaporation and temporal freshwater input into the lagoon. The d 13 C carb values (1‰ to +4‰ vs. VPDB) were controlled mainly by changes in primary production. Both isotopic ratios show an inverse relationship throughout most of the core, contradicting diagenetic alteration, since d 13 C carb values are not altered significantly during dolomitization. Assuming a temperature range of 35-40 C in the lagoon, d 18 O carb values of +2.5‰ to +8‰ (vs. VSMOW) for the lagoonal water can be reconstructed. The lagoon may have desiccated twice during the Ca2 interval, as indicated by very high d 18 O carb and low d 13 C carb values, coinciding with increasing amount of anhydrite in the analyzed sample.These events seem to reflect not just local but a regional intra-Ca2 cyclicity. Measured dD values of the shortchain n-alkanes, namely n-C 16 and n-C 18 which are widely used as indicators for photosynthetic bacterial and algal input, reflect the isotopic composition of the lagoonal water. Assuming constant fractionation during incorporation of hydrogen into lipids of 160‰, an average dD value of +70‰ (vs. VSMOW) can be reconstructed for the lagoonal water, accounting for very arid conditions. The long-chain n-alkanes n-C 27 , n-C 28 , n-C 29 and n-C 30 , thought to be derived from the leaf waxes of terrestrial higher plants, were shown to be depleted in D relative to the short-chain alkanes, therefore indicating a different hydrogen source. Terrestrial plants in arid areas mainly use water supplied by precipitation. By using a smaller fractionation of 120‰ due to evaporation processes in the leaves, reconstructed values vary between 74‰ and 9‰ (vs. VSMOW). These values are not indicating extremely arid conditions, implying that the long-chain n-alkanes were transported trough wind and/or rivers into the lagoon at the Zechstein Sea coast. dD water values, reconstructed using the n-C 16 alkane and d 18 O water values, independently reconstructed on the same sample using the temperature dependant fractionation for dolomites are good agreement and suggest high amounts of evaporation affecting the coastal lagoon. Altogether, our results indicate that hydrogen isotopic ratios of nalkanes give information on their origin and are a useful proxy for palaeoclimatic reconstruction.

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“…4). Two desiccation events, probably coinciding with the three intra-Ca2 cycles as proposed by Piske and Schretzenmayr (1984) and Strohmenger et al (1996) could be identified.…”

Section: Discussionmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

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Reconstruction of palaeohydrological conditions in a lagoon during the 2nd Zechstein cycle through simultaneous use of ?D values of individual n-alkanes and ?18O and ?13C values of carbonates

Sachse

Radke

Gaupp

et al. 2004

Int J Earth Sci (Geol Rundsch)

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“…By way of contrast, basin center sequences are falling-stage and lowstand evaporites (laminated gypsum/anhydrite and bedded halite), passing up into transgressive-highstand pelagic, starved-basin, condensed organic-calcareous rhythmites, possibly with highstand calciturbidites derived from adjacent platforms. In recent years, other sequence stratigraphic interpretations have been published for the Zechstein of NW Europe including Strohmenger et al (1996) for Germany, Peryt and Wagner (1998) and Slowakiewicz and Mikolajewski (2009) for Poland. Differences re- late to decisions of where to place the sequence bound…”

Section: Case Study: the Upper Permian Carbonate-evaporite Successionmentioning

confidence: 99%

Sequence Stratigraphy: Methodology and Nomenclature

Catuneanu

Galloway

Kendall

et al. 2011

nos

762

460

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Abstract. The recurrence of the same types of sequence stratigraphic surface through geologic time defines cycles of change in accommodation or sediment supply, which correspond to sequences in the rock record. These cycles may be symmetrical or asymmetrical, and may or may not include all types of systems tracts that may be expected within a fully developed sequence. Depending on the scale of observation, sequences and their bounding surfaces may be ascribed to different hierarchical orders. Stratal stacking patterns combine to define trends in geometric character that include upstepping, forestepping, backstepping and downstepping, expressing three types of shoreline shift: forced regression (forestepping and downstepping at the shoreline), normal regression (forestepping and upstepping at the shoreline) and transgression (backstepping at the shoreline). Stacking patterns that are independent of shoreline trajectories may also be defined on the basis of changes in depositional style that can be correlated regionally. All stratal stacking patterns reflect the interplay of the same two fundamental variables, namely accommodation (the space available for potential sediment accumulation) and sediment supply. Deposits defined by specific stratal stacking patterns form the basic constituents of any sequence stratigraphic unit, from sequence to systems tract and parasequence. Changes in stratal stacking patterns define the position and timing of key sequence stratigraphic surfaces. Precisely which surfaces are selected as sequence boundaries varies as a function of which surfaces are best expressed within the context of the depositional setting and the preservation of facies relationships and stratal stacking patterns in that succession. The high degree of variability in the expression of sequence stratigraphic units and bounding surfaces in the rock record means ideally that the methodology used to analyze their depositional setting should be flexible from one sequence stratigraphic approach to another. Construction of this framework ensures the success of the method in terms of its objectives to provide a process-based understanding of the stratigraphic architecture. The purpose of this paper is to emphasize a standard but flexible methodology that remains objective.

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“…The thickness ranges between 20 and 80 m for platform and 10 and 250 m for slope deposits, with decreasing thickness from upper to lower slope. The basinal facies is usually thinner than 10 m. The overall trend in thickness and facies distribution is influenced by sea-level variations, tectonic subsidence, syndepositional tectonic, and the geometry of the underlying Werra Anhydrite [42]. Highest thicknesses are achieved within the upper slope, where the Ca2 directly overlies the former A1 slope [35].…”

Section: Geological Backgroundmentioning

confidence: 99%

Dedolomitization Potential of Fluids from Gypsum-to-Anhydrite Conversion: Mass Balance Constraints from the Late Permian Zechstein-2-Carbonates in NW Germany

2018

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The Zechstein-2-Carbonates represent one of the most prolific hydrocarbon systems of Central Europe. Carbonate reservoir quality is primarily controlled by mineralogy, with dolomite representing moderate-to-good porosities and calcite commonly representing low porosities. Current models suggest that this calcite is the result of a basin-wide phase of dedolomitization. The calcium (Ca) source for the dedolomites is thought to be derived from the fluids liberated during gypsum-to-anhydrite conversion. We present an easy-to-use and generally applicable template to estimate the dedolomitization potential of these fluids. Depending on reaction stoichiometry, salinity, and temperature, we estimate that between 2.8 * 10 −3 m 3 and 6.2 * 10 −3 m 3 of calcite may replace dolomite for each m 3 of anhydrite created. Within the constraints dictated by the environment of the late Permian Zechstein basin, we estimate that about 5 * 10 −3 m 3 of dedolomite is created for each m 3 of anhydrite. Mass balance constraints indicate that fluids derived from gypsum-to-anhydrite conversion account for less than 1% of the observed dedolomite in most of the studied industry wells from northern Germany.

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Sequence stratigraphy and cyclic development of Basal Zechstein carbonate-evaporite deposits with emphasis on Zechstein 2 off-platform carbonates (Upper Permian, Northeast Germany)

Cited by 75 publications

References 25 publications

Reconstruction of palaeohydrological conditions in a lagoon during the 2nd Zechstein cycle through simultaneous use of ?D values of individual n-alkanes and ?18O and ?13C values of carbonates

Reconstruction of palaeohydrological conditions in a lagoon during the 2nd Zechstein cycle through simultaneous use of ?D values of individual n-alkanes and ?18O and ?13C values of carbonates

Sequence Stratigraphy: Methodology and Nomenclature

Dedolomitization Potential of Fluids from Gypsum-to-Anhydrite Conversion: Mass Balance Constraints from the Late Permian Zechstein-2-Carbonates in NW Germany

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