High-resolution biotratigraphy and chemostratigraphy of the Cenomanian/Turonian boundary event in the Vocontian Basin, southeast France

Groshény, Danièle; Beaudoin, Bernard; Morel, Laurence; Desmares, Delphine

doi:10.1016/j.cretres.2006.03.005

Cited by 53 publications

(49 citation statements)

References 39 publications

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“…The lower part of the Co trend shows variations similar to As (with values between 1 and 6 ppm). In the second part of the section (from 20 m to the top), Co contents shows rather low values with a slight increase at w32 m. Mo contents remain quite constant along the entire section and deviate towards higher values only in the interval coeval with the decrease in d (Schlanger and Jenkyns, 1976;Jenkyns, 1980;Pratt and Threlkeld, 1984;Gale et al, 1993;Jenkyns et al, 1994;Leckie et al, 2002;Tsikos et al, 2004;Caron et al, 2006;Jarvis et al, 2006;Grosheny et al, 2006;Voigt et al, 2006Voigt et al, , 2007Mort et al, 2007;Takashima et al, 2010). The typical shape of the CeT boundary positive excursion, as observed in the GSSP section at Pueblo, Colorado (Pratt and Threlkeld, 1984;Sageman et al, 2006) Kingdom (Paul et al, 1999;Gale et al, 2005) is characterized by (1) a first increase in d…”

Section: Redox-sensitive Trace Elementsmentioning

confidence: 99%

“…The onset of OAE 2 is characterized by an important positive excursion in the d 13 C carbonate bulk-rock record of approximately 2.5& (Schlanger and Jenkyns, 1976;Jenkyns, 1980;Schlanger et al, 1987;Gale et al, 1993;Erbacher et al, 1996;Jarvis et al, 2006;Voigt et al, 2006). OAE 2 is also marked by an extinction event and turnover in planktonic foraminifera, radiolaria and nannofossil assemblages (Eicher and Worstell, 1970;Hart and Bigg, 1981;Caron and Homewood, 1992;Leckie, 1985;Hart and Ball, 1986;Lamolda et al, 1997;Grosheny and Malartre, 1997;Keller et al, 2001;Leckie et al, 2002;Erba, 2004;Caron et al, 2006;Grosheny et al, 2006), a sealevel rise (Haq et al, 1987) Sr ratio (Jones and Jenkyns, 2001). Recently, Mort et al (2007) showed that the onset of OAE 2 correlates with a general increase in P-accumulation rates, which may have triggered an overall increase in sea surface-water productivity.…”

Section: Introductionmentioning

confidence: 99%

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Evidence for oxic conditions during oceanic anoxic event 2 in the northern Tethyan pelagic realm

Westermann

Caron

Fiet

et al. 2010

Cretaceous Research

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Upper Cenomanian pelagic sediments from the northern Alpine Helvetic fold-and-thrust belt (northern Tethyan margin) coeval with Oceanic Anoxic Event (OAE) 2 are characterized by the temporal persistence of micrite sedimentation and lack of organic carbon-rich layers. We studied an expanded section in the Chrummflueschlucht (east of Euthal, Switzerland), which encompasses the OAE 2 time interval. In order to identify the paleoceanographic and paleoenvironmental conditions during OAE 2 in this part of the northern Tethyan margin, and more specifically to trace eventual changes in nutrient levels and oxic conditions, we investigated the biostratigraphy (planktonic foraminifera), the bulk-rock mineralogy, and measured stable carbon-and oxygen-isotopes, total phosphorus (P) and redox-sensitive trace-element (RSTE) contents.We were able to determine e with some remaining uncertainties e the different planktonic foraminiferal biozones characteristic of the CenomanianeTuronian boundary interval (Rotalipora cushmani, Whiteinella archaeocretacea and Helvetoglobotruncana helvetica zones). In the lower part of the section (R.cushmani total range zone), the bulk-rock d 13 C record shows a long-term increase. Within sediments attributed to the W. archaeocretacea partial range zone, d13 C values reach a maximum of 3.3& (peak "a").In the following the values decrease and increase again to arrive at a plateau with high d13 C values of around 3.1&, which ends with a peak of 3.3& (peak "c"). At the top of the section, in sediments belonging to the H. helvetica total range zone, d13 C values decrease to post-OAE values of around 2.2&.The last occurrence of R. cushmani is observed just above the positive d 13 C shift characterizing OAE 2. P contents display small variations along the section with a long-term decreasing trend towards the top. Before the OAE 2 interval, P values show higher values and relatively good covariation with detrital input, indicating higher nutrient input before OAE 2. In sediments corresponding to the onset of the d 13 C positive excursion, P content is marked by a sharp peak probably linked to a slowdown in sedimentation rates and/or the presence of a small hiatus, as is shown by the presence of glauconite and phosphatic grains. In the interval corresponding to OAE 2, P values remain low and increase slightly at the end of the positive shift in the d 13 C record (in the H. helvetica total range zone). The average contents of RSTE (U, V, As, Co, Mo and Mn) remain low throughout the section and appreciable RSTE enrichments have not been observed for the sedimentary interval corresponding to OAE 2. No correlation is observed with stratigraphic trends in RSTE contents in organic-rich deeper-water sections. The presence of double-keeled planktonic foraminifera species during most of the Cenomanian/Turonian boundary event is another evidence of relatively well-oxygenated conditions in this part of the northern Tethyan outer shelf.Our results show that the Chrummflueschlucht section corresponds to one of the most...

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Section: Redox-sensitive Trace Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evidence for oxic conditions during oceanic anoxic event 2 in the northern Tethyan pelagic realm

Westermann

Caron

Fiet

et al. 2010

Cretaceous Research

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“…The last occurrence of R. cushmani is correlated with the uppermost Cenomanian, which is equivalent to the basal horizon of the OAE2 interval ( Fig. 2c) [19][20][21][22][23] . The first occurrence of the calcareous nannofossil marker species Quadrum gartneri Prins and Perch-Nielsen, which occurs at the base of the Turonian and the upper part or just above the OAE2 interval ( Fig.…”

Section: Biostratigraphymentioning

confidence: 99%

“…A detailed bio-and carbon isotope-stratigraphic framework across the OAE2 interval has been determined for Pueblo (USA), Eastbourne (England), Tarfaya (Morocco), Wadi Bahloul (Tunisia), Provence (France) and Gubbio (Italy) [19][20][21][22][23] . These studies have revealed a detailed stratigraphic range of age-diagnostic marker species in macro-and microfossils across OAE2.…”

Section: Biostratigraphymentioning

confidence: 99%

Prevailing oxic environments in the Pacific Ocean during the mid-Cretaceous Oceanic Anoxic Event 2

et al. 2011

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“…The record of Pont d'Issole in France (Tethys Ocean) (Grosheny et al 2006;Jarvis et al 2011) displays two prominent black shale intervals within an interbedded limestone-grey marl succession. This succession is similar to Gharesu and Taherabad in many ways (increase of carbonate and planktonic foraminiferal diversity in cooling interval) but differs from Gharesu and Taherabad by its further depth and sedimentation of black shale before and after the cold event.…”

Section: The Late Cenomanian Sea Surface Temperature Coolingmentioning

confidence: 99%

Planktonic foraminiferal turnover across the Cenomanian – Turonian boundary (OAE2) in the northeast of the Tethys realm, Kopet-Dagh Basin

Kalanat¹,

Vahidinia²,

Vaziri‐Moghaddam³

et al. 2016

Geologica Carpathica

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Two Late Cenomanian -Early Turonian (C-T) intervals of the eastern part of the Kopet-Dagh basin, NE Iran have been investigated to evaluate the response of planktonic foraminifera to the geological event OAE2. The Gharesu and Taherabad sections with the thicknesses of 30 m and 22.5 m are composed of shale and marl interbedded with glauconitic sandstone. Three biozones Rotalipora cushmani, Whiteinella archaeocretacea and Helvetoglobotruncana helvetica were recognized based on study of planktonic foraminifera, in these sections. We observed the patterns of planktonic foraminiferal assemblage changes around the C-T boundary and divided this succession into several successive intervals. This study confirms that OAE2 was a long term event. A gradual perturbation in the study successions starts in the interval 1 with low abundance and diversity of planktonic foraminifera. An enhanced oxygen minimum zone (OMZ) occurs in the interval 3 which coincides with a temporary absence of planktonic foraminifera and sedimentation of framboidal pyrite. High diversity of planktonic foraminifera and appearance of new genera in the interval 5 indicate return of normal conditions to the basin. A significant short-term sea surface temperature cooling is also indicated by planktonic foraminiferal turnover and carbonate contents in the interval 2 which is comparable with other parts of the Tethys Ocean, Boreal sea and Atlantic region.

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High-resolution biotratigraphy and chemostratigraphy of the Cenomanian/Turonian boundary event in the Vocontian Basin, southeast France

Cited by 53 publications

References 39 publications

Evidence for oxic conditions during oceanic anoxic event 2 in the northern Tethyan pelagic realm

Evidence for oxic conditions during oceanic anoxic event 2 in the northern Tethyan pelagic realm

Prevailing oxic environments in the Pacific Ocean during the mid-Cretaceous Oceanic Anoxic Event 2

Planktonic foraminiferal turnover across the Cenomanian – Turonian boundary (OAE2) in the northeast of the Tethys realm, Kopet-Dagh Basin

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