Deep-water asymmetric cycles and progradation of carbonate platforms governed by high-frequency eustatic oscillations (Triassic of the Dolomites, Italy)

Masetti, Daniele; Neri, Camillo; Bosellini, Alfonso

doi:10.1130/0091-7613(1991)019<0336:dwacap>2.3.co;2

Cited by 35 publications

(21 citation statements)

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“…Small-scale compositional cycles are observed superimposed on the large-scale trend. These input cycles with different magnitude most likely can be correlated, as suggested for the Carnian record by Burchell et al (1990) and Masetti et al (1988Masetti et al ( , 1991, to a third-order sea-level fluctuation with superimposed fourth-and fifth-order fluctuations. The small-scale bundling seen in Fig.…”

Section: Discussionmentioning

confidence: 90%

“…The input cycles of the individual point-count groups show gradual waxing and waning trends and no asymmetrical cycles. Masetti et al (1991) recorded the same type of pattern in his cycle analysis of the Carnian. We, however, could not find such a clear correlation between grains of pathological origin and progradation as proposed by Bosellini (1989) and Masetti et al (1988Masetti et al ( , 1991.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the type of grains encountered in the single layers at the toe-ofslope could give some indication as to which environments were able to produce excess sediment. In the Dolomites, Bosellini (1989) distinguished two types of grains in the carbonate systems present: (a) "pathological" (erosion products); and (b) "physiological" (resulting from excess platform productivity) grains; thus, two types of progradation are expected (Masetti et al 1991). Physiological prograda-tion resulting from redeposition of carbonate mud and sand previously accumulated at the platform edge, typically associated with sea-level highstands.…”

Section: Introductionmentioning

confidence: 99%

“…Subaerial exposure and increased erosion of the lithified platform top produce enough pathological sediments to enable the system to prograde (Masetti et al 1991). The progradation of the Cassian and the Carnian platforms in the Dolomites are seen as representative for pathological progradation (Bosellini 1984(Bosellini , 1989Masetti et al 1991). Sarg (1988), however, describes the Carnian carbonate platforms as a typical example for progradation during the late highstand.…”

Section: Introductionmentioning

confidence: 99%

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Compositional variations during phases of progradation and retrogradation of a Triassic carbonate platform (Picco di Vallandro/Dürrenstein, dolomites, Italy)

Reijmer

1998

Geol Rundsch

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In this paper data are presented on the composition of sediments deposited at the toe of slope during progradation or retreat of Triassic carbonate platforms in the Dolomites (Italy). For this purpose a succession was studied from the toe of slope of a Triassic (Carnian) carbonate platform (Picco di Vallendro/Dürrenstein, Dolomites, Italy). The microfacies analysis of selected calciturbidites sequences revealed a reduced input of oncolites and ooids during progradation and an increase in clasts. The main input, however, was derived from the reefs on the platform. Retrogradation of the platform showed an increase of filaments and radiolarians (open ocean biota) as well as carbonate mud and a reduced input of grains that originated within the reefs on the platform. Both during progradation and retrogradation parts of the platform were flooded and could produce excess sediment that could be exported to the surrounding basins. However, the absence of platform interior biota documents that progradation occurred from sediments of the reefal belt, probably during relative sea-level lowstands. Carbonate composition varies systematically with toe-of-slope progradation/retrogradation and, thus, argues for carbonate production as the main driver of the geometries observed at the toe of slope.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compositional variations during phases of progradation and retrogradation of a Triassic carbonate platform (Picco di Vallandro/Dürrenstein, dolomites, Italy)

Reijmer

1998

Geol Rundsch

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“…However, in other deep-water sediments, the presence of high-frequency sea-level changes responsible for a cyclic sedimentary signature with periodicities consistent with orbital (so-called Milankovitch) forcing has been demonstrated in many studies (e.g. Savrda & Bottjer 1986, 1989Masetti et al 1991;Erba & Silva 1994;Damholt & Surlyk 2004;Heard et al 2008). In many shallow-water carbonate platform settings, the cyclically stacked building blocks of 3rd-order sequences can equally be attributed to orbital forcing of sea-level changes.…”

Section: Introductionmentioning

confidence: 99%

High-frequency sea-level changes recorded in deep-water carbonates of the Upper Cretaceous Dol Formation (island of Brač, Croatia)

Bucković¹,

Martinuš²,

Kukoč³

et al. 2010

Geologica Carpathica

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Abstract:The upper part of the Middle Coniacian/Santonian-Middle Campanian deep-water Dol Formation of the island of Brač is composed of countless fine-grained allodapic intercalations deposited in an intraplatform trough. Within the studied section 13 beds can be distinguished, each defined by its lower part built up of dark grey limestone with abundance of branched, horizontally to subhorizontally oriented burrows, and the upper part, in which the light grey to white limestone contains larger burrows, rarely branched, showing no preferential orientation. The lower, dark grey, intensively bioturbated levels are interpreted as intervals formed during high-frequency sea-level highstands, while the upper, light grey-to-white levels are interpreted as intervals formed during the high-frequency sea-level lowstands. Cyclic alternation of these two intervals within the fine-grained allodapic beds is interpreted as the interaction between the amount of carbonate production on the platform margin and the periodicity and intensity of shedding and deposition in the distal part of toeof-slope environment, which is governed by Milankovitch-band high frequency sea-level changes.

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Controls on the evolution and demise of Lower Carboniferous carbonate platforms, northern margin of the Dublin Basin, Ireland

et al. 1994

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Shallow water platform limestones of the Chadian-Asbian Milverton Group are restricted to the north-eastern part of the Lower Carboniferous (Dinantian) Dublin Basin. Here, they are confined to two granite-cored fault blocks, the Kentstown and Balbriggan Blocks, known to have been active during the late Dinantian. Three areas of platform sedimentation are delimited (the Kentstown, Drogheda and Milverton areas), although in reality they probably formed part of a single carbonate platform. Resedimented submarine breccias and calciturbidites (Fingal Group) composed of shallow water allochems and intraclasts sourced from the platform accumulated, along with terrigenous muds, in the surrounding basinal areas.Sedimentological evidence suggests that the Kentstown and Balbriggan Blocks possessed tilt-block geometries and developed during an episode of basin-wide extensional faulting in late Chadian time. Rotation of the blocks during extension resulted in the erosion of previously deposited sequences in footwall areas and concomitant drowning of distal hangingwall sequences. Antithetic faults on the northern part of the Balbriggan Block aided the preferential subsidence of the Drogheda area and accounts for the anomously thick sequence of late Chadian platform sediments present there. Continued subsidence andor sea-level rise in the late Chadian-early Arundian resulted in transgression of the Kentstown and Balbriggan Blocks; carbonate ramps developed on the hangingwall dip slopes and transgressed southward with time. Subsequent progradation and aggradation of shallow water sediments throughout the Arundian to Asbian led to the development of carbonate shelves. Several coarse conglomeratic intervals within the contemporaneous basinal sequences of the Fingal Group attest to periodic increases of sediment influx associated with the development of the shelves.Sedimentological processes controlled the development of the carbonate platforms on the hangingwall dip slopes of the Kentstown and Balbriggan Blocks, though periodic increases of sediment flux into the basinal areas may have been triggered by eustatic falls in sea level. In contrast, differential subsidence along the bounding faults of these blocks exerted a strong control on the margins of the late Dinantian shelves, maintaining relatively steep slopes and inhibiting the progradation of the shelves into the adjacent basins.Tectonically induced collapse and retreat of the platform margins occurred in the late Asbian-early Brigantian. Platform sediments are overlain by coarse-grained proximal basinal facies which fine upwards before passing into a thick shale sequence, indicating that by the late Brigantian carbonate production had almost stopped as the platforms were drowned.

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Deep-water asymmetric cycles and progradation of carbonate platforms governed by high-frequency eustatic oscillations (Triassic of the Dolomites, Italy)

Cited by 35 publications

References 0 publications

Compositional variations during phases of progradation and retrogradation of a Triassic carbonate platform (Picco di Vallandro/Dürrenstein, dolomites, Italy)

Compositional variations during phases of progradation and retrogradation of a Triassic carbonate platform (Picco di Vallandro/Dürrenstein, dolomites, Italy)

High-frequency sea-level changes recorded in deep-water carbonates of the Upper Cretaceous Dol Formation (island of Brač, Croatia)

Controls on the evolution and demise of Lower Carboniferous carbonate platforms, northern margin of the Dublin Basin, Ireland

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