Stable isotope and trace element geochemistry of Upper Cretaceous carbonates and belemnite rostra (Middle Campanian, north Germany)

Niebuhr, Birgit; Joachimski, Michael M.

doi:10.1016/s0016-6995(02)00009-8

Cited by 37 publications

(22 citation statements)

References 17 publications

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“…As noted by previous authors (e.g., Veizer & Fritz, 1976;Saelen, 1989;Saelen et al, 1996;Podlaha et al, 1998;Niebuhr & Joachimski, 2002;Van de Schootbrugge et al, 2005), thin sections of belemnite rostra investigated under a cathodoluminescence microscope show a characteristic distribution pattern of altered and unaltered areas. Altered areas are commonly the exterior portions of the shells, bored and cracked zones, the calcite along the apical line and zones along some (but not all) visible growth lines.…”

Section: Diagenetic Screeningsupporting

confidence: 70%

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Belemnite-based strontium, carbon and oxygen isotope stratigraphy of the type area of the Maastrichtian Stage

Vonhof

Jagt

Immenhauser

et al. 2011

Netherlands Journal of Geosciences

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Belemnitellid cephalopods from the Maastrichtian stratotype area (southeast Netherlands) are shown to be comparatively well preserved. Although partial diagenetic alteration has been observed, micromilling techniques have permitted the extraction of pristine belemnite calcite, suitable for the reconstruction of strontium (Sr), oxygen (O) and carbon (C) isotope variation of Maastrichtian seawater. A distinct Sr isotope pattern in the Maastricht record can be matched stratigraphically with records from Hemmoor (northern Germany), El Kef (Tunisia) and ODP site 690 (Maud Rise, Antarctica), leading to a new chemostratigraphical age model for the Maastrichtian stratotype section. Our data improve currently applied strontium isotope stratigraphical reference curves by revealing an Sr isotope inflection pattern near the lower/upper Maastrichtian boundary that is a potentially diagnostic feature for intra-Maastrichtian stratigraphical correlation between distant sections. Belemnites further show significant stratigraphical oxygen isotope variation through the Maastrichtian. We interpret this variation to have resulted from palaeoceanographic reorganisations in the Atlantic Ocean during this time interval.

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Section: Diagenetic Screeningsupporting

confidence: 70%

“…7a to represent the average isotope value of that particular belemnite, let alone of that stratigraphical interval (Spaeth et al, 1971;Niebuhr & Joachimski, 2002;Mutterlose et al, 2010).…”

Section: Stable Isotope Variation Of the Belemnites Studiedmentioning

confidence: 99%

Belemnite-based strontium, carbon and oxygen isotope stratigraphy of the type area of the Maastrichtian Stage

Vonhof

Jagt

Immenhauser

et al. 2011

Netherlands Journal of Geosciences

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“…The nonluminescent parts of 109 individual belemnite rostra were sampled for a total of 142 stable isotope analyses. Some of the data from the lower Upper Campanian Misburg Formation have already been included in the papers by Niebuhr and Joachimski (2002) and Niebuhr (2005). However, new analyses have been obtained from additional samples of this site, and the belemnite data from the other localities studied herein are entirely new.…”

Section: Belemnitesmentioning

confidence: 91%

“…All isotopic values are reported in the standard d-notation relative to V-PDB. Calcite palaeotemperature values were calculated using the equation of Anderson and Arthur (1983) (Niebuhr and Joachimski 2002;Niebuhr 2005;Niebuhr et al 2011); for the scope of the present paper they have been supplemented by the yet unpublished data from the intervening Dägeling Formation and integrated into an continuous new dataset ranging from the earliest Late Campanian into the Early Maastrichtian. Biostratigraphically, the isotope curve spans the interval from the Ec.…”

Section: Methodsmentioning

confidence: 99%

“…6A, C, D, H). The studied belemnite calcite has Mg concentrations of only 0.2 % (Niebuhr and Joachimski 2002) and, therefore, the rostra consist of low-magnesium calcite. An original porosity of belemnite rostra has been suggested by Hoffmann et al (2016) but is not supported by our microstructural investigations and stable isotope values (see below), and it would contradict interpretations of its function as a counterbalance.…”

Section: Microstructural Investigationsmentioning

confidence: 98%

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High-resolution Campanian–Maastrichtian carbon and oxygen stable isotopes of bulk-rock and skeletal components: palaeoceanographic and palaeoenvironmental implications for the Boreal shelf sea

Wilmsen¹,

Niebuhr²

2017

Acta Geologica Polonica

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ABSTRACT:Wilmsen, M. and Niebuhr, B. 2017. High-resolution Campanian-Maastrichtian carbon and oxygen stable isotopes of bulk-rock and skeletal components: palaeoceanographic and palaeoenvironmental implications for the Boreal shelf sea. Acta Geologica Polonica, 67 (1), 47-74. Warszawa.A high-resolution latest Early Campanian to Early Maastrichtian carbon and oxygen stable isotope record from the northern German Boreal shelf sea based on 537 analyses of co-occurring belemnites, brachiopods, inoceramids, oysters, and bulk rock samples is presented. All samples are precisely related to their stratigraphic, systematic and facies backgrounds and form an integrated, nearly 10-myr-long dataset with considerable palaeoenvironmental and palaeoceanographical implications. Petrographic studies indicate that low-magnesium calcitic coccoliths and calcispheres (i.e., planktic carbonate) predominate the bulk-rock data (marl-limestone rhythmites and chalks), thus representing a sea-surface water signal, and that only minor diagenetic alteration of the carbonate muds took place. Based on TL and CL microscopy, the investigated belemnites are extraordinarily well preserved, which may in part be explained by their early diagenetic surficial silicification (container effect), while the other macroinvertebrate groups are all less well preserved. The (plankton-dominated) d O signal of ambient seawater (12 ± 2°C). In the absence of any indication for migration from cooler water masses and evidence for authochtonous populations we assume that the belemnites of the genera Belemnitella and Belemnella lived as nektobenthos near the sea-floor and thus record the temperature of the bottom mixed layer of the seasonally weakly stratified north German shelf sea at water depths of 100 to 150 m; the temperature gradient was thus 12.5-18.75 m/1°C. A conspicuous latest Campanian cooling event is evident in both sea-surface and bottom-water temperatures. The d 18O values of nearly all investigated benthic fossils lie between the isotope values of pristine belemnites and bulk rock, and, therefore, should be used for palaeotemperature reconstructions only with great care.

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Ammonoid Habitats and Life History

Lukeneder

2015

Topics in Geobiology

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Stable isotope and trace element geochemistry of Upper Cretaceous carbonates and belemnite rostra (Middle Campanian, north Germany)

Cited by 37 publications

References 17 publications

Belemnite-based strontium, carbon and oxygen isotope stratigraphy of the type area of the Maastrichtian Stage

Belemnite-based strontium, carbon and oxygen isotope stratigraphy of the type area of the Maastrichtian Stage

High-resolution Campanian–Maastrichtian carbon and oxygen stable isotopes of bulk-rock and skeletal components: palaeoceanographic and palaeoenvironmental implications for the Boreal shelf sea

Ammonoid Habitats and Life History

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