The reefal margin and slope of a Middle Triassic carbonate platform: the Latemar (Dolomites, Italy)

Emmerich, Axel; Zamparelli, Valeria; Bechstädt, Thilo; Zühlke, Rainer

doi:10.1007/s10347-004-0033-6

Cited by 65 publications

(48 citation statements)

References 45 publications

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“…Occurrence and stratigraphic rang e: Celyphia zoldana is known from the Anisian of the Dolomites, Italy (Ott et al 1980;Senowbari-Daryan et al 1993 and further references; Emmerich et al 2005), Karawanken, Austria (Schafhauser 1997), and from the reef of Aggtelek; both from reef stage 1 and reef stage 2 (this paper).…”

Section: Celyphia Zoldanamentioning

confidence: 74%

“…C. catenulata catenulata is known from several Ladinian-Carnian reef localities in the former Tethyan realm (Austria, Greece, Italy, Slovakia). The species is described from the Anisian reef limestones of Latemar (Dolomites, Italy) by Emmerich et al (2005) Descriptio n: The specimens of this sponge are poorly preserved and therefore all characteristics are not recognizable. The diameter of both specimens, illustrated in Fig.…”

Section: Colospongia Catenulata Catenulatamentioning

confidence: 99%

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Sponges from the Middle Triassic reef limestone of the Aggtelek Karst (NE Hungary)

Senowbari‐Daryan¹,

Kovács²,

Velledits³

2011

Geologica Carpathica

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Abstract:The hypercalcified sponge fauna of the Middle Triassic (Anisian-Ladinian) reef limestone exposed between Aggtelek-Jósvafő-Égerszög (northern Hungary) is described. Almost all the identified species are chambered sponges ("sphinctozoa"). Only two fragments of a not determinable species of non-chambered species ("inozoa") were identified. Hexactinellid sponges are not found. The majority of the Middle Anisian "sphinctozoans" are absolutely different genera, not known from the Permian reefs. The sponge fauna of the Triassic pioneer reefs in the Aggtelek Karst are distinctly small-scaled occurring in "Tubiphytes"-dominated carbonates. The following taxa are described: Amblysiphonella sp.,

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Section: Celyphia Zoldanamentioning

confidence: 74%

Section: Colospongia Catenulata Catenulatamentioning

confidence: 99%

Sponges from the Middle Triassic reef limestone of the Aggtelek Karst (NE Hungary)

Senowbari‐Daryan¹,

Kovács²,

Velledits³

2011

Geologica Carpathica

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“…From this point of view, the lower Middle Anisian section in the Mahmudia Quarry resembles the shelf-edge framestones of the Anisian Chinese reefs (Enos et al 1997(Enos et al , 2006Payne et al 2006) and the Middle Anisian to Lower Ladinian boundstone facies of Latemar (Harris 1993;Emmerich et al 2005;Marangon et al 2011) and Marmolada (Russo et al 2000), both in the Italian Dolomites, and the Middle Anisian carbonate mounds in central Iran (Berra et al 2012).…”

Section: Comparison With Other Tubiphytes-buildups Known In the Geolomentioning

confidence: 96%

“…Emmerich et al 2005), the prominent Tubiphytes occurrence is the most important feature in the lower Middle Anisian buildup in the Mahmudia Quarry. It is stated that the Tubiphytes micro-encruster enabled the stabilisation of carbonate sediments in the upper slope and allowed cement-rich reefs to flourish in the early Middle Anisian (Senowbary-Daryan et al 1993;Enos et al 2006).…”

Section: Depositional Environmentmentioning

confidence: 96%

“…The North Dobrogean Tubiphytes-dominated framework, with a high volume (30-50%) of penecontemporaneous and early-diagenetic cements and a considerable amount of automicrite, corresponds well to other Tubiphytes-dominated reefs, known from the Late Palaeozoic to Mesozoic: the Permian reefs of the Urals in Russia (Chuvashov 1983;Antoshkina 1998), the Permian Capitan Reef in the United States (Tinker 1998;Saller et al 1999;Weidlich 2002), and the Middle Triassic (Anisian-Ladinian) reefs, such as the Great Bank of Guizhou, in south China (Enos et al 1997(Enos et al , 2006Lehrmann 1999;Payne et al 2006Payne et al , 2011Lehrmann et al 2007), the Camorelli Bank and Concarena platform in the Italian Lombardic Alps (Gaetani and Gorza 1989;Berra et al 2005;Seeling et al 2005), the Latemar platform in the Italian Dolomites (Harris 1993(Harris , 1994Emmerich et al 2005;Marangon et al 2011;Preto et al 2011), and the Aggtelek reef in Hungary (Velledits et al 2011(Velledits et al , 2012. Microbial boundstones, as Tubiphytes-dominated facies, are also the main constituents of the Carboniferous upper slopes in the Cantabrian Mountains in northern Spain (Della Porta et al 2003;2004;Kenter et al 2005;Bahamonde et al 2007).…”

Section: Comparison With Other Tubiphytes-buildups Known In the Geolomentioning

confidence: 99%

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An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

Popa¹,

Panaiotu²,

Grădinaru³

2014

Acta Geologica Polonica

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ABSTRACT:Popa, L., Panaiotu, C.E. and Grădinaru, E. 2014. An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis. Acta Geologica Polonica, 64 (2), 189-206. Warszawa.A well-developed Triassic carbonate platform is exposed in the eastern part of the Tulcea Unit, in the Cimmerian North Dobrogean Orogen, southeastern Romania. Facies analysis of the 200 m thick succession of lower Middle Anisian limestones exposed in a large limestone quarry south of the village of Mahmudia suggests a transition from upper slope towards toe-of-slope carbonate facies, reflecting sea-level fluctuations and tectonic tilting. The slope is dominated by in situ microbialites in the upper portion, consisting of reefal boundstone facies, and by molluscan coquina and cement boundstones. A key role is played by the cosmopolitan micro-encruster Tubiphytes, which became common in the aftermath of the mass extinction at the Permian/Triassic boundary, and by autochthonous micrite and synsedimentary marine cement. The absence of metazoan reef builders, such as sponges and corals, reflects the fact that microbes were the first organisms to recover after the Permian/Triassic crisis under unusual marine conditions and that their main role in reef formation was sediment stabilization along the upper slopes. The lower slope is mostly detrital, being dominated by platform-derived bioclastic rudstones and crinoidal floatstones, which are interbedded with basinal carbonate hemipelagics. The toe-of-slope is composed of pelagic wackestones framed by thin tongues of intraclast breccia. All these observations are in agreement with the slopeshedding model described for the Pennsylvanian microbial margin in Asturias (northern Spain) and the AnisianLadinian flat-topped, steep-rimmed Latemar platform (Dolomites, Italy).As most of the Anisian reefs were described from western and eastern Tethys (Southern Alps, Hungary, China), the occurrence of the early Middle Anisian Tubiphytes-reef from North Dobrogea (Romania) contributes to resolving the puzzle of the geographic distribution of reef recovery in the Middle Triassic.

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Multiscale fracture network characterization and impact on flow: A case study on the Latemar carbonate platform

et al. 2015

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A fracture network arrangement is quantified across an isolated carbonate platform from outcrop and aerial imagery to address its impact on fluid flow. The network is described in terms of fracture density, orientation, and length distribution parameters. Of particular interest is the role of fracture cross connections and abutments on the effective permeability. Hence, the flow simulations explicitly account for network topology by adopting Discrete‐Fracture‐and‐Matrix description. The interior of the Latemar carbonate platform (Dolomites, Italy) is taken as outcrop analogue for subsurface reservoirs of isolated carbonate build‐ups that exhibit a fracture‐dominated permeability. New is our dual strategy to describe the fracture network both as deterministic‐ and stochastic‐based inputs for flow simulations. The fracture geometries are captured explicitly and form a multiscale data set by integration of interpretations from outcrops, airborne imagery, and lidar. The deterministic network descriptions form the basis for descriptive rules that are diagnostic of the complex natural fracture arrangement. The fracture networks exhibit a variable degree of multitier hierarchies with smaller‐sized fractures abutting against larger fractures under both right and oblique angles. The influence of network topology on connectivity is quantified using Discrete‐Fracture‐Single phase fluid flow simulations. The simulation results show that the effective permeability for the fracture and matrix ensemble can be 50 to 400 times higher than the matrix permeability of 1.0 · 10−14 m2. The permeability enhancement is strongly controlled by the connectivity of the fracture network. Therefore, the degree of intersecting and abutting fractures should be captured from outcrops with accuracy to be of value as analogue.

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The reefal margin and slope of a Middle Triassic carbonate platform: the Latemar (Dolomites, Italy)

Cited by 65 publications

References 45 publications

Sponges from the Middle Triassic reef limestone of the Aggtelek Karst (NE Hungary)

Sponges from the Middle Triassic reef limestone of the Aggtelek Karst (NE Hungary)

An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

Multiscale fracture network characterization and impact on flow: A case study on the Latemar carbonate platform

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