Details
| Original language | English |
|---|---|
| Pages (from-to) | 3111-3128 |
| Number of pages | 18 |
| Journal | Geochemistry, Geophysics, Geosystems |
| Volume | 16 |
| Issue number | 9 |
| Publication status | Published - 1 Sept 2015 |
Abstract
Deep-time shallow-marine carbonate platforms record distinct biotic responses to climatic and environmental stressors. Unfortunately, precise temporal assignment of these biotic responses is often problematical due to poor biostratigraphic control and/or a significant diagenetic overprint of the neritic bulk carbonate chemostratigraphic inventory. An accurate stratigraphic framework is essential to better understand the causal relation between biotic events recorded by carbonate platforms and environmental changes that, for instance, culminated in mass extinction events or prolonged episodes of oceanic anoxia. Here we provide an integrated carbon and strontium-isotope stratigraphy of the Early Cretaceous subtropical Provence carbonate platform in SE France that is based solely on pristine low-Mg calcite from rudist bivalves. Carbon-isotope data of geochemically screened rudist fragments enabled reconstruction of a characteristic Barremian pattern including the Mid-Barremian Event (MBE) that allowed for a precise correlation with stratigraphically well-constrained Tethyan shallow-water and hemipelagic reference sections. In order to evaluate ontogenetic carbon-isotope changes and the overall variability of the shell-derived carbon-isotope data, numerous sclerochronological carbon-isotope profiles of individual large rudist shells are presented. Strontium-isotope stratigraphy supports the carbon-isotope-based age of the studied sections, but also provides unequivocal evidence for a major hiatus in the depositional record covering large parts of the Late Barremian. In contrast to biostratigraphic and bulk carbonate chemostratigraphic archives, the here established chronostratigraphy of carbonate platform evolution in the southern Provence region demonstrates a twofold resurgence of rudist-rich carbonate platform production during the Early Aptian and arguably the latest Early Aptian. Key Points: Rudist shell carbon-isotope sclerochemistry enables assessing major δ13CDIC trends Rudist 87Sr/86Sr and δ13C data allow stratigraphic refinement of neritic sections Strontium-isotope stratigraphy reveals a major Late Barremian hiatus (1.2 Myr)
Keywords
- carbon isotopes, carbonate platforms, Cretaceous, rudist shell sclerochemistry, strontium-isotope stratigraphy
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
Sustainable Development Goals
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In: Geochemistry, Geophysics, Geosystems, Vol. 16, No. 9, 01.09.2015, p. 3111-3128.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Improving shallow-water carbonate chemostratigraphy by means of rudist bivalve sclerochemistry
AU - Huck, S.
AU - Heimhofer, U.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - Deep-time shallow-marine carbonate platforms record distinct biotic responses to climatic and environmental stressors. Unfortunately, precise temporal assignment of these biotic responses is often problematical due to poor biostratigraphic control and/or a significant diagenetic overprint of the neritic bulk carbonate chemostratigraphic inventory. An accurate stratigraphic framework is essential to better understand the causal relation between biotic events recorded by carbonate platforms and environmental changes that, for instance, culminated in mass extinction events or prolonged episodes of oceanic anoxia. Here we provide an integrated carbon and strontium-isotope stratigraphy of the Early Cretaceous subtropical Provence carbonate platform in SE France that is based solely on pristine low-Mg calcite from rudist bivalves. Carbon-isotope data of geochemically screened rudist fragments enabled reconstruction of a characteristic Barremian pattern including the Mid-Barremian Event (MBE) that allowed for a precise correlation with stratigraphically well-constrained Tethyan shallow-water and hemipelagic reference sections. In order to evaluate ontogenetic carbon-isotope changes and the overall variability of the shell-derived carbon-isotope data, numerous sclerochronological carbon-isotope profiles of individual large rudist shells are presented. Strontium-isotope stratigraphy supports the carbon-isotope-based age of the studied sections, but also provides unequivocal evidence for a major hiatus in the depositional record covering large parts of the Late Barremian. In contrast to biostratigraphic and bulk carbonate chemostratigraphic archives, the here established chronostratigraphy of carbonate platform evolution in the southern Provence region demonstrates a twofold resurgence of rudist-rich carbonate platform production during the Early Aptian and arguably the latest Early Aptian. Key Points: Rudist shell carbon-isotope sclerochemistry enables assessing major δ13CDIC trends Rudist 87Sr/86Sr and δ13C data allow stratigraphic refinement of neritic sections Strontium-isotope stratigraphy reveals a major Late Barremian hiatus (1.2 Myr)
AB - Deep-time shallow-marine carbonate platforms record distinct biotic responses to climatic and environmental stressors. Unfortunately, precise temporal assignment of these biotic responses is often problematical due to poor biostratigraphic control and/or a significant diagenetic overprint of the neritic bulk carbonate chemostratigraphic inventory. An accurate stratigraphic framework is essential to better understand the causal relation between biotic events recorded by carbonate platforms and environmental changes that, for instance, culminated in mass extinction events or prolonged episodes of oceanic anoxia. Here we provide an integrated carbon and strontium-isotope stratigraphy of the Early Cretaceous subtropical Provence carbonate platform in SE France that is based solely on pristine low-Mg calcite from rudist bivalves. Carbon-isotope data of geochemically screened rudist fragments enabled reconstruction of a characteristic Barremian pattern including the Mid-Barremian Event (MBE) that allowed for a precise correlation with stratigraphically well-constrained Tethyan shallow-water and hemipelagic reference sections. In order to evaluate ontogenetic carbon-isotope changes and the overall variability of the shell-derived carbon-isotope data, numerous sclerochronological carbon-isotope profiles of individual large rudist shells are presented. Strontium-isotope stratigraphy supports the carbon-isotope-based age of the studied sections, but also provides unequivocal evidence for a major hiatus in the depositional record covering large parts of the Late Barremian. In contrast to biostratigraphic and bulk carbonate chemostratigraphic archives, the here established chronostratigraphy of carbonate platform evolution in the southern Provence region demonstrates a twofold resurgence of rudist-rich carbonate platform production during the Early Aptian and arguably the latest Early Aptian. Key Points: Rudist shell carbon-isotope sclerochemistry enables assessing major δ13CDIC trends Rudist 87Sr/86Sr and δ13C data allow stratigraphic refinement of neritic sections Strontium-isotope stratigraphy reveals a major Late Barremian hiatus (1.2 Myr)
KW - carbon isotopes
KW - carbonate platforms
KW - Cretaceous
KW - rudist shell sclerochemistry
KW - strontium-isotope stratigraphy
UR - http://www.scopus.com/inward/record.url?scp=84944154717&partnerID=8YFLogxK
U2 - 10.1002/2015GC005988
DO - 10.1002/2015GC005988
M3 - Article
AN - SCOPUS:84944154717
VL - 16
SP - 3111
EP - 3128
JO - Geochemistry, Geophysics, Geosystems
JF - Geochemistry, Geophysics, Geosystems
SN - 1525-2027
IS - 9
ER -