Former magnesian calcite and aragonite submarine cements in upper Paleozoic reefs of the Canadian Arctic: A summary

Davies, Graham

doi:10.1130/0091-7613(1977)5<11:fmcaas>2.0.co;2

Cited by 94 publications

(46 citation statements)

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“…Such resemblance led Davies et al (2004) to draw some analogies between modern algal buildups occurring oV Australia and Late Paleozoic phylloid algal mounds. Carbon and oxygen isotopic compositions of marine cements originating from the studied reefs point to "normal" marine values assumed for the Pennsylvanian seawater (author's unpublished data) and compare well with the values obtained from the Canadian examples (Davies 1977).…”

Section: Depositional Environmentsupporting

confidence: 69%

“…Furthermore, the depositional environment assumed agrees well with that inferred for phylloid algal mounds in the Canadian Arctic Archipelago, in which marine cements (including botryoidal cement) represent a major component in volume and importance in stabilizing the reef structure (Davies 1977;Beauchamp et al 1989). Such resemblance led Davies et al (2004) to draw some analogies between modern algal buildups occurring oV Australia and Late Paleozoic phylloid algal mounds.…”

Section: Depositional Environmentsupporting

confidence: 69%

See 1 more Smart Citation

Paleoecology of Pennsylvanian phylloid algal buildups in south Guizhou, China

Gong

Samankassou

Guan

et al. 2007

Facies

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Section: Depositional Environmentsupporting

confidence: 69%

Section: Depositional Environmentsupporting

confidence: 69%

Paleoecology of Pennsylvanian phylloid algal buildups in south Guizhou, China

Gong

Samankassou

Guan

et al. 2007

Facies

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“…Large growth-framework cavities are filled by isopachous fibrous radiaxial calcite, typically observed in reef facies (e.g. Davies, 1977). The reef facies are preserved as a narrow belt that rapidly passes seaward to massive slope breccias.…”

Section: Depositional Architecturementioning

confidence: 99%

Forward modelling of carbonate platforms: Sedimentological and diagenetic constraints from an application to a flat-topped greenhouse platform (Triassic, Southern Alps, Italy)

Berra

Lanfranchi

Smart³

et al. 2016

Marine and Petroleum Geology

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•We propose a quantitative analysis of a carbonate platform using 3d numerical models.• Parameter definition is critical to produce realistic 3d numerical models.• Modelling parameters were defined by architectural and sedimentological studies. •The obtained model has been tested by comparison with outcrop and laboratory data.• 3d numerical models may help to parameterise petrophysical properties of geobodies.Key words: carbonate platform, forward modelling, Triassic, facies analysis, diagenesis 2 AbstractQuantitative analysis of depositional systems using numerical models can provide insights into the interaction of sedimentological and diagenetic processes, difficult to interpret from observation of the geological products alone. Numerical models can highlight the interactions between controlling parameters, and generate best estimate simulations of case studies from the geological record. Different data sources (e.g., outcrop data, uniformitarian constraints, paleogeography) need to be considered in the process of defining the parameters required to produce models that honour individual case studies. We present a best-estimate forward model of a high-relief Triassic carbonate platform (Southern Alps, Italy) generated using CARB3D+, a 3D process-based forward modelling package able to simulate sedimentary facies, geometries and early diagenesis of isolated carbonate platforms. The parameters used for the presented forward model have been deduced by the study of architectural, sedimentological and diagenetic features of the platform, and by data from modern and ancient analogues. Sensitivity analysis is used to tune values of the parameters within ranges defined from field, laboratory and uniformitarian constraints. Critical evaluation of the model allowed 1) verification of the validity of the used parameters; 2) evaluation of the interaction between controlling parameters; 3) development of a numerical model that can be used for quantitative elaborations. Furthermore, the process of generating the numerical model required a detailed interpretation of field and laboratory data, crucial to define the required input parameters. Modelling the studied carbonate platform also enabled evaluation of the effects of the interaction between productivity, environmental energy and creation of accommodation space, promoting the understanding of their role on the architecture of carbonate systems. Forward modelling also allows the integration of data from conventional data sets with data from presentday observations and seismic geometries, promoting a transition from a qualitative to a semiquantitative/quantitative sedimentological approach. Forward models can further be used to parameterise petrophysical properties of complex geobodies, with potential application for the management of georesources.

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“…The author's concern, that such a relation must, unacceptably, imply early precipitation of a tier of cement on the floor before any was precipited on the roof, is seen to be unnecessary. Relevant to this discussion is a detailed and lucid comparison of Ordovician neomorphosed cements with their modern analogues (Davies, 1977).…”

mentioning

confidence: 99%

Ordovician Meiklejohn bioherm, Nevada

Bathurst

1977

Geol. Mag.

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Former magnesian calcite and aragonite submarine cements in upper Paleozoic reefs of the Canadian Arctic: A summary

Cited by 94 publications

References 0 publications

Paleoecology of Pennsylvanian phylloid algal buildups in south Guizhou, China

Paleoecology of Pennsylvanian phylloid algal buildups in south Guizhou, China

Forward modelling of carbonate platforms: Sedimentological and diagenetic constraints from an application to a flat-topped greenhouse platform (Triassic, Southern Alps, Italy)

Ordovician Meiklejohn bioherm, Nevada

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