Details
Original language | English |
---|---|
Pages (from-to) | 389-413 |
Number of pages | 25 |
Journal | Newsletters on Stratigraphy |
Volume | 53 |
Issue number | 4 |
Early online date | 2 Dec 2019 |
Publication status | Published - 17 Sept 2020 |
Abstract
Shallow-water carbonate platform sections are valuable archives for the reconstruction of deep-time environmental and climatic conditions, but the low resolution of biostratigraphic schemes associated with frequent sedimentary hiatuses often hampers their precise chronostratigraphic assignment. Moreover, chemostratigraphic correlation of shallow-water sections with well-dated pelagic successions is notoriously difficult and associated with large uncertainties, as shallow-water bulk carbonate archives are particularly prone to the impact of diagenesis. This study examines central Tethyan mid-Cretaceous carbonate platform deposits exposed in the Central Apennines (Italy) suffering several emersion phases, which cause sedimentary gaps of variable duration. The investigated sections (Santa Lucia, Monte La Costa) represent a transect through the Apennine Carbonate Platform, ranging from the lagoonal inner carbonate platform realm towards the platform margin. Although benthic foraminifera are at times scarce and the carbonates evidently suffered diagenetic alteration, high-resolution carbon isotope stratigraphy combined with (rudist and chondrodont shell) strontium isotope stratigraphy enables a correlation of the studied sections with pelagic composite reference curves. A detailed foraminiferal-algal biostratigraphic record of the studied shallow-water sections and their integration into high-resolution carbon and strontium isotope stratigraphy is presented. This approach allows precise estimates of the time lost in major sedimentary hiatuses, three of which were identified at the Santa Lucia locality. There, long-lasting hiatuses cover parts of the Early Aptian (3.2 Myr), the Late Aptian (3.3 Myr) and the Late Albian to Cenomanian (14.3 Myr), the latter being associated with formation of karst-filling bauxite. The documentation and dating of sedimentary hiatuses in the Apennine Carbonate Platform sector presented here is essential to correlate emersion phases observed in the peri-mediterranean region, in particular with respect to the mechanisms of their origin.
Keywords
- Apennine carbonate platform, Biostrati-graphy, Chemostratigraphy, Cretaceous, Emersion, Sedimentary gaps
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Plant Science
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Stratigraphy
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In: Newsletters on Stratigraphy, Vol. 53, No. 4, 17.09.2020, p. 389-413.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Deciphering the fragmentary nature of cretaceous shallow-water limestone archives
T2 - A case study from the subtropical apennine carbonate platform
AU - Schmitt, Katharina
AU - Heimhofer, Ulrich
AU - Frijia, Gianluca
AU - Di Lucia, Matteo
AU - Huck, Stefan
N1 - Funding information:. We thank Christiane Wenske (LUH) for laboratory assistance and Fritz-Lukas Stoepke (LUH) for thin-section preparation. Financial support from German Research Foundation (DFG) projects HU 2258/2-1186 (SH) and HE 4467/8-1 is gratefully acknowledged. We would like to thank two anonymous reviewers for their critical comments and constructive contributions.
PY - 2020/9/17
Y1 - 2020/9/17
N2 - Shallow-water carbonate platform sections are valuable archives for the reconstruction of deep-time environmental and climatic conditions, but the low resolution of biostratigraphic schemes associated with frequent sedimentary hiatuses often hampers their precise chronostratigraphic assignment. Moreover, chemostratigraphic correlation of shallow-water sections with well-dated pelagic successions is notoriously difficult and associated with large uncertainties, as shallow-water bulk carbonate archives are particularly prone to the impact of diagenesis. This study examines central Tethyan mid-Cretaceous carbonate platform deposits exposed in the Central Apennines (Italy) suffering several emersion phases, which cause sedimentary gaps of variable duration. The investigated sections (Santa Lucia, Monte La Costa) represent a transect through the Apennine Carbonate Platform, ranging from the lagoonal inner carbonate platform realm towards the platform margin. Although benthic foraminifera are at times scarce and the carbonates evidently suffered diagenetic alteration, high-resolution carbon isotope stratigraphy combined with (rudist and chondrodont shell) strontium isotope stratigraphy enables a correlation of the studied sections with pelagic composite reference curves. A detailed foraminiferal-algal biostratigraphic record of the studied shallow-water sections and their integration into high-resolution carbon and strontium isotope stratigraphy is presented. This approach allows precise estimates of the time lost in major sedimentary hiatuses, three of which were identified at the Santa Lucia locality. There, long-lasting hiatuses cover parts of the Early Aptian (3.2 Myr), the Late Aptian (3.3 Myr) and the Late Albian to Cenomanian (14.3 Myr), the latter being associated with formation of karst-filling bauxite. The documentation and dating of sedimentary hiatuses in the Apennine Carbonate Platform sector presented here is essential to correlate emersion phases observed in the peri-mediterranean region, in particular with respect to the mechanisms of their origin.
AB - Shallow-water carbonate platform sections are valuable archives for the reconstruction of deep-time environmental and climatic conditions, but the low resolution of biostratigraphic schemes associated with frequent sedimentary hiatuses often hampers their precise chronostratigraphic assignment. Moreover, chemostratigraphic correlation of shallow-water sections with well-dated pelagic successions is notoriously difficult and associated with large uncertainties, as shallow-water bulk carbonate archives are particularly prone to the impact of diagenesis. This study examines central Tethyan mid-Cretaceous carbonate platform deposits exposed in the Central Apennines (Italy) suffering several emersion phases, which cause sedimentary gaps of variable duration. The investigated sections (Santa Lucia, Monte La Costa) represent a transect through the Apennine Carbonate Platform, ranging from the lagoonal inner carbonate platform realm towards the platform margin. Although benthic foraminifera are at times scarce and the carbonates evidently suffered diagenetic alteration, high-resolution carbon isotope stratigraphy combined with (rudist and chondrodont shell) strontium isotope stratigraphy enables a correlation of the studied sections with pelagic composite reference curves. A detailed foraminiferal-algal biostratigraphic record of the studied shallow-water sections and their integration into high-resolution carbon and strontium isotope stratigraphy is presented. This approach allows precise estimates of the time lost in major sedimentary hiatuses, three of which were identified at the Santa Lucia locality. There, long-lasting hiatuses cover parts of the Early Aptian (3.2 Myr), the Late Aptian (3.3 Myr) and the Late Albian to Cenomanian (14.3 Myr), the latter being associated with formation of karst-filling bauxite. The documentation and dating of sedimentary hiatuses in the Apennine Carbonate Platform sector presented here is essential to correlate emersion phases observed in the peri-mediterranean region, in particular with respect to the mechanisms of their origin.
KW - Apennine carbonate platform
KW - Biostrati-graphy
KW - Chemostratigraphy
KW - Cretaceous
KW - Emersion
KW - Sedimentary gaps
UR - http://www.scopus.com/inward/record.url?scp=85097666189&partnerID=8YFLogxK
U2 - 10.1127/nos/2019/0551
DO - 10.1127/nos/2019/0551
M3 - Article
AN - SCOPUS:85097666189
VL - 53
SP - 389
EP - 413
JO - Newsletters on Stratigraphy
JF - Newsletters on Stratigraphy
SN - 0078-0421
IS - 4
ER -