Aragonite dissolution, sedimentation rates and carbon isotopes in deep-water hemipelagites (Livinallongo Formation, Middle Triassic, northern Italy)

Preto, Nereo; Spötl, Christoph; Mietto, Paolo; Gianolla, Piero; Riva, A.; Manfrin, Stefano

doi:10.1016/j.sedgeo.2005.08.001

Cited by 33 publications

(72 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Below Piz del Corvo the thickness of this Upper Serla -Contrin interval starts to decrease. Along Rio Sacuz the basinal Ambata Formation onlaps a westerly adjacent slope of the Contrin Formation (Blendinger et al 1982;Preto et al 2005).…”

Section: Pre-platform Units and The Shape Of The Platform Basementioning

confidence: 99%

Geometry and chronology of growth and drowning of Middle Triassic carbonate platforms (Cernera and Bivera/Clapsavon) in the Southern Alps (northern Italy)

et al. 2007

View full text Add to dashboard Cite

The depositional architecture and the geometric relationships between platform-slope deposits and basinal sediments along with paleontological evidence indicate the time interval of the younger Anisian Reitziites reitzi ammonoid zone to largely represent the main stage of platform aggradation at the Cernera and Bivera/Clapsavon carbonate platforms. Published and new U-Pb age data of zircons from volcaniclastic layers bracketing the stratigraphic interval of platform growth constrain the duration of platform evolution to a time span shorter than 1.8±0.7m.y., probably in the order of 0.5-1m.y., reflecting fast rates of vertical platform aggradation exceeding 500 m/m.y. In the range of growth potentials for shallow-water carbonate systems estimated in relation to the time span of observation, this high rate is in agreement with values for short intervals of 10 5 -10 6 yrs (e.g., Schlager 1999).After drowning, the platforms at Cernera and Bivera/Clapsavon were blanketed by thin pelagic carbonates. On the former platform flanks the draping sediments in places comprise red nodular pelagic limestones (Clapsavon Limestone) similar in facies to the Han Bulog Limestones occurring elsewhere in Middle Triassic successions of the Mediterranean Tethys. The drowning of vast areas of former carbonate platforms possibly triggered the onset of bottom-water circulation in adjacent basins as suggested by the abrupt transition from laminated to bioturbated pelagic nodular limestones in the Buchenstein Formation which occurred close to the time of initial platform submergence. During the Late Ladinian the topographic features of the drowned platforms were onlapped by rapidly deposited, predominantly clastic successions including coarse breccias and volcanic rocks sealing and preserving the peculiar stratigraphic setting. ZUSAMMENFASSUNGDie Architektur der retrogradierenden Karbonatplattformen der Cernera und des Bivera/Clapsavon Massifs weisen zusammen mit den geometrischen Beziehungen zwischen Plattformabhang-und Beckensedimenten und der Verbreitung von Ammonoideen auf ein kurzes Wachstumsintervall in der späten Reitziites reitzi Ammonitenzone (spätes Anisian) hin. Publizierte und neue hoch auflösende U-Pb-Alter von Zirkonen aus vulkanoklastischen Lagen grenzen dieses stratigraphische Intervall ein und ergeben für die Hauptphase des vertikalen Wachstums der Cernera-und der Bivera/Clapsavon-Plattform einen Zeitraum von weniger als 1.8±0.7 m.y., wahrscheinlich in der Grössen-ordnung von 0.5-1m.y.. In den als Funktion der Beobachtungsdauer geschätz-ten Wachstumspotentialen für Flachwasserkarbonatsysteme fällt die aus obiger Zeitspanne resultierende hohe Sedimentationsrate von 500 m/m.y. und mehr in den Bereich der Werte für die Bebachtungsdauer 10 5 -10 6 y (z.B. Schlager 1999).Nach dem Absinken der Cernera-und der Bivera/Clapsavon-Plattform wurden die markanten untermeerischen Erhebungen von geringmächtigen pelagischen Karbonaten bedeckt, Diese umfassen an den Plattformflanken unter anderem rote Knollenkalke (Clapsavon-Kalk) m...

show abstract

Section: Pre-platform Units and The Shape Of The Platform Basementioning

confidence: 99%

Geometry and chronology of growth and drowning of Middle Triassic carbonate platforms (Cernera and Bivera/Clapsavon) in the Southern Alps (northern Italy)

et al. 2007

View full text Add to dashboard Cite

show abstract

“…Platform drowning can be controlled by many factors, including rapid eustatic sea-level rise, crustal subsidence, ecological stress, water temperature, upwelling of cold deep water and the rate of sediment production and removal (see discussion in Bice and Stewart 1990, pp. 161-163;Bosellini and Morsilli 1997;Simone and Carannante 1988;Preto et al 2005;Mutti et al 2005). Platform drowning may occur in various tectonic settings: extensional basins (Bernoulli and Jenkyns 1974;Bice and Stewart 1990), pull-apart basins (Duncan et al 1999) and foreland basins (Robertson 1988;Galewsky 1998).…”

Section: Introductionmentioning

confidence: 99%

Progressive drowning of carbonate platform in the Moravo-Silesian Basin (Czech Republic) before the Frasnian/Famennian event: facies, compositional variations and gamma-ray spectrometry

Bábek

Přikryl

Hladil

2007

Facies

View full text Add to dashboard Cite

The Moravo-Silesian Basin (MSB; eastern Czech Republic and southern Poland) hosted an extensive shallow-water carbonate platform in the Middle Devonian to Frasnian interval. The platform drowned in a stepwise fashion from the Palmatolepis hassi to the Pa. linguiformis zone. Three types of drowning successions were revealed from conodont biostratigraphy, facies, microfacies and gamma-ray spectrometry data: (A) drowning to periplatform turbidite setting; (B) drowning to (hemi)pelagic seamount setting and (C) drowning associated with the stratigraphical gap.

show abstract

“…Hence, the results of our study question the hypothesis of mounded geometries owing to low carbonate productivity at the coeval but drowned Monte Cernera carbonate platform (Blendinger et al, 2004). It is much more likely that the drowning is related to upwelling of cold water masses into the western Tethys as proposed by Preto et al (2005) than to low productivity of a not fully recovered carbonate factory.…”

Section: Carbonate Accumulation Ratesmentioning

confidence: 52%

Numerical Simulation of the Syn‐ to Post‐Depositional History of a Prograding Carbonate Platform: The Rosengarten, Middle Triassic, Dolomites, Italy

Emmerich

Tscherny

Bechstädt

et al. 2008

Analogue and Numerical Modelling of Sedimentary Systems: From Understanding to Prediction

View full text Add to dashboard Cite

A combination of thermal history, numerical basin-reverse and sequence-stratigraphic forward modelling is applied to the Mesozoic outcrop analogue of the Rosengarten carbonate platform area in the Dolomites of northern Italy. This integrated multidisciplinary approach of numerical simulation quantifies the thermal, subsidence, geometrical and subsequent facies evolution of the area. Calibration data during modelling were vitrinite reflectance (VR) and apatite fission-track (FT) analyses as well as detailed outcrop studies. Vitrinite reflectance values in strata underlying the carbonate platform vary between 0.5 and 0.8% VR r ; apatites from these formations reveal cooling ages of around 165.6 Ma and track lengths of approximately 9.8 µm. This low thermal maturity combined with the FT data in apatites indicates a relatively cool (<110 • C), protracted (between 250 and 30 Ma) and shallow burial (thickness of eroded strata overlying present-day topography is <1100 m), as well as a fast exhumation from the Middle Miocene onward. Maximum temperatures are reached during the Middle/Late Triassic, when the basal heat flow was elevated owing to regional volcanic and hydrothermal activity. Local anomalies in vitrinite reflectance of up to 1.1% VR r in the immediate surroundings of the Predazzo/Monzoni volcanic centre show that its thermal influence decreased rapidly with increasing distance. The geometrical evolution of the Middle Triassic (Anisian/Ladinian) Rosengarten platform is twofold: the first stage reveals aggradation, the second progradation of the platform margin. Basin-reverse modelling results indicate that these two intervals originate from a temporal change in tectonic subsidence. Spatial variations in flexural and tectonic subsidence along the 6 km transect are insignificant due to the rigidity of the basement (up to 2500 m of Late Permian ignimbrites). During the first stage of platform evolution, high pulse-like total subsidence rates of up to 820 m Myr −1 led to aggradation, whereas the subsequent drop to 100 m Myr −1 initiated platform progradation. The short-spanned subsidence peak was linked to block movements in a strike-slip tectonic setting (Cima Bocche Anticline-Stava Line approximately 10 km southeast of the study area). Stratigraphic forward modelling quantifies the sediment volumes involved in the geometrical evolution of the platform. In order to replicate platform architecture, constant carbonate accumulation rates between 900 and 1000 m Myr −1 -increasing from periplatform environments to the slope -have to be assumed throughout the existence (approximately 5.8 Myr) of the Rosengarten. As the carbonate factory successfully keeps up with the modelled accommodation rates, it must have completely recovered from the Permian-Triassic biotic crisis during the onset of platform growth in latest Anisian times despite the low biotic diversity of the platform succession seen elsewhere in the Dolomites. Our forward modelling confirms that the main carbonate factory was situated on the slope at water dep...

show abstract

Aragonite dissolution, sedimentation rates and carbon isotopes in deep-water hemipelagites (Livinallongo Formation, Middle Triassic, northern Italy)

Cited by 33 publications

References 26 publications

Geometry and chronology of growth and drowning of Middle Triassic carbonate platforms (Cernera and Bivera/Clapsavon) in the Southern Alps (northern Italy)

Geometry and chronology of growth and drowning of Middle Triassic carbonate platforms (Cernera and Bivera/Clapsavon) in the Southern Alps (northern Italy)

Progressive drowning of carbonate platform in the Moravo-Silesian Basin (Czech Republic) before the Frasnian/Famennian event: facies, compositional variations and gamma-ray spectrometry

Numerical Simulation of the Syn‐ to Post‐Depositional History of a Prograding Carbonate Platform: The Rosengarten, Middle Triassic, Dolomites, Italy

Contact Info

Product

Resources

About