Manganese in Pelagic carbonates: indication of major Tectonic events during the geodynamic evolution of a passive continental margin (the Jurassic European Margin of the Tethys–Ligurian Sea)

Corbin, J.C.; Person, Alain; Iatzoura, A.; Ferré, Bruno; Renard, Maurice

doi:10.1016/s0031-0182(99)00135-2

Cited by 59 publications

(34 citation statements)

References 33 publications

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“…Earlier studies have shown that marine manganese and iron ores were formed at times of peculiar paleoceanographic conditions. "Mn giants" of the early Toarcian, late Jurassic, Aptian, Albian, Cenomanian/Turonian boundary, and Miocene are correlated with ocean-wide anoxia (Oceanic Anoxic Events) and/or changes in the carbon cycle as expressed by positive δ 13 C excursions (e.g., Pomerol 1983;Frakes & Bolton 1984, 1992Schlanger et al 1987;Van Houten & Arthur 1989;Jenkyns et al 1991Jenkyns et al , 2002Pratt et al 1991;Corbin et al 2000;De Rafélis et al 2001). …”

Section: Introductionmentioning

confidence: 99%

Altered carbon cycling and trace-metal enrichment during the late Valanginian and early Hauterivian

Kuhn¹,

Weissert

Föllmi

et al. 2005

Eclogae geol. Helv.

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Section: Introductionmentioning

confidence: 99%

Altered carbon cycling and trace-metal enrichment during the late Valanginian and early Hauterivian

Kuhn¹,

Weissert

Föllmi

et al. 2005

Eclogae geol. Helv.

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“…At the same stratigraphic interval, a peak in abundance of the radiolarian family Pantanelliidae was recorded, indicating the maximum development of eutrophic conditions (Goričan et al, 2003). Rise of eustatic sea level and enhanced global oceanic Mn flux could have characterized the early Toarcian as a result of hydrothermal activity during rapid seafloor spreading (Corbin et al, 2000). However, the high Mn contents measured in the lower part of Monte Mangart section might not be justified solely by an increase in hydrothermal inputs during the most active expansion phase of midoceanic ridges.…”

Section: Mn Fluctuations Sea-level Variations and Anoxiamentioning

confidence: 99%

“…Sediments in anoxic marine environments are commonly depleted in manganese because low Eh values favour the stability of Mn 2+ ions in aqueous solutions (Force and Cannon, 1988). However, Mn-rich (Mn 2+ ) carbonates stratigraphically associated with Jurassic black shales have been recognized in basinal pelagic deposits from Austria, Germany, Switzerland, Slovakia, Italy, and Hungary (Bellanca et al, 1999;Corbin et al, 2000;Ebli et al, 1998;Jenkyns, 1988;Jenkyns et al, 1991;Polgári et al, 1991Polgári et al, , 2004Rantitsch et al, 2003;Vetö et al, 1997). Ferromanganese oxyhydroxide crusts and nodules (Mn 4+ ) formed on topographic highs (seamounts) in relatively shallow waters are also characteristic of the Jurassic Tethys (Cronan et al, 1991;Di Stefano et al, 2002;Jenkyns, 1970Jenkyns, , 1971Jenkyns, , 1977.…”

Section: Introductionmentioning

confidence: 99%

“…Several authors (i.e. Corbin et al, 2000;Jach and Dudek, 2005) linked the elevated concentrations of Mn in Jurassic sediments of the western Tethys to increasing submarine hydrothermal activity during progressive rifting of the Tethyan passive continental margin; in addition, Jenkyns et al (1991) suggested a possible continental derivation of Mn transported through the oxygen minimum zone across the Tethyan continental margin.…”

Section: Introductionmentioning

confidence: 99%

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Petrography and high-resolution geochemical records of Lower Jurassic manganese-rich deposits from Monte Mangart, Julian Alps

Sabatino¹,

Neri²,

Bellanca³

et al. 2011

Palaeogeography, Palaeoclimatology, Palaeoecology

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Deposits with unusually high Mn contents sampled at Monte Mangart in the Julian Alps include organic-rich marlstone and black shale with interbedded manganoan and siliceous limestone, which were deposited during the early Toarcian Oceanic Anoxic Event. Mn enrichment during that period has been related to global sea-level change coincident with increasing subsidence rate. The formation of Fe-Mn nodules, marking a hardground at the base of the Monte Mangart section, seems to be triggered by release of Mn from remote hydrothermal vents into a region of relatively elevated submarine topography where oxidizing conditions prevailed. However, very high Mn contents in carbonate phases above the hardground imply an additional diagenetic source of this element in the lower part of this section. The whole stratigraphic sequence (ca 30 m) displays a transition from Mn-rich (up to 8.8%) sediments, in the lower part, to Mn-poor (less than 1.8%) sediments in the middle and upper parts. The drastic decrease in Mn content's up-section is accompanied by a clear decrease in the mean size of pyrite framboids, indicating more intense anoxia/euxinia in the water column. In the presence of Mn 2+ , conditions of high alkalinity induced precipitation of Mn carbonates during early diagenetic processes. Negative δ 13C carb values coincident with high Mn contents indicate involvement of organic matter in the mineralization process. The striking similarity of Ce/Ce* and Mn profiles demonstrates that, consistent with redox-chemistry of Mn and Ce under anoxic conditions, Ce 3+ and Mn 2+ were mobilized and released into pore water where precipitation of Mn carbonates occurred.

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“…Petrographically and in terms of biofacies, these deposits are relatively uniform mudstones to wackestones, with common ammonoids, scarce sponges and very scarce nautiloids, brachiopods, bivalves, belemnites, echi noids, crinoids and gastropods. As to microfossils, the overall sedimentary fades shows a calcisphere-mudstone texture; the marls contain foraminifers (Lenticulina, Dentalina), ostracods and molluscs (cephalopods, bivalves, gastropods) along with detrital minerals, quartz, muscovite and biotite (Corbin et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Formal proposal for the Bathonian GSSP (Middle Jurassic) in the Ravin du Bès Section (Bas-Auran, SE France)

Fernández-López

Pavia²,

Erba

et al. 2009

Swiss J. Geosci.

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The Bathonian Global Stratotype Section and Point (GSSP) is proposed at the base of limestone bed RB071 (bed 23 in Sturani 1967) in the Ravin du Bes Section (43057' 38" N, 6° IS' 55" E), Bas-Auran area, "Alpes de Haute Provence" French department. The Ravin du BesSectioll , as formal candidate GSSP for the base of the Bathonian Stage, satisfies most of the requirements recommended by the International Commission on Stratigraphy: 1) The ex posure extends over 13 m in thickness. At the Bajocian-Bathonian transition, no vertical (bio-, ichno-or tap ho-) facies changes, condensation, stratigraphic gaps or hiatuses have been recorded. Structural complexity, synsedimentary and tectonic disturbances, or important alterations by metamorphism are not relevant constraints. 2) There is a well-preserved, abundant and diverse fos sil record across the boundary interval, with key markers (ammonites and IntroductionThe present paper corresponds to part of the scientifIc dossier recently prepared by several specialists and sent to all mem bers of the Bathonian Working Group (International Subcom mission on Jurassic Stratigraphy, November 2007), in order to achieve the formal ballot on the selection and proposal of the Global Stratotype Section and Point (hereafter GSSP The Bathonian Working Group (BtWG) was established in 1984, during the 1st International Symposium on Jurassic Stratigraphy in Erlangen, in order to improve the geologic data relative to the Bajocian/Bathonian boundary. The Bas-Auran section was first proposed as stratotype in a presentation to the Luxembourg II (1967) Colloquium by Torren� but not pub lished until 1974lished until (Morton 1974Torrens 1974a Torrens , b, 1987 Torrens , 2002 fig. 8; pI. 19, fIgS. 1-2) are the index species, respectively, of the Bathonian basal zone and subzone. The Zigzag Zone was distinguished from the underlying Parkinsoni Zone by Oppel (1857Oppel ( . p. 579. 1862. and later assigned to the "Bath-Gruppe·· (Oppel 1865. p. 309) in a discussion of the section at "Mon tagne de Crussol" in the Ardeche (France). The Convergens Subzone was mentioned by Maubeuge (1950, p. 4), based on the "Convergens horizon" that was used in letters by Arkell (1951-59. p.10; 1956. p. 62). The Bajocian/Bathonian bound ary established between the Parkinsoni and Zigzag zones was recommended at the two congresses denominated "Colloque du Jurassique" held in Luxembourg in 1962(Rioult 1964 Tor rens 1965) and 1967(Torrens 1974a. The localities of Bath (England) and the "Montagne de Crussol" (France), however, have been considered quite unsuitable for a typological defini tion of the Bathonian Stage, because they are condensed sec tions with discontinuous and lenticular beds (Torrens 1974a(Torrens , b, 2002Page 1996b). After the publication of Sturani (1967) (Sturani 1967). The Parvum Sub zone has been proposed by Mangold (1990) to denote the first Bathonian subzone of the Zigzag Zone in the Sub-Mediter ranean Province, equivalent to the Convergens Sub zone of the Northwest European Province...

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Manganese in Pelagic carbonates: indication of major Tectonic events during the geodynamic evolution of a passive continental margin (the Jurassic European Margin of the Tethys–Ligurian Sea)

Cited by 59 publications

References 33 publications

Altered carbon cycling and trace-metal enrichment during the late Valanginian and early Hauterivian

Altered carbon cycling and trace-metal enrichment during the late Valanginian and early Hauterivian

Petrography and high-resolution geochemical records of Lower Jurassic manganese-rich deposits from Monte Mangart, Julian Alps

Formal proposal for the Bathonian GSSP (Middle Jurassic) in the Ravin du Bès Section (Bas-Auran, SE France)

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