Reliability of volcano-sedimentary biotite ages across the Eocene-Oligocene boundary (Apennines, Italy)

Odin, G.S.; Montanari, A.; Deino, A.; Drake, Robert E.; Guise, P. G.; Kreuzer, H. J.; Rex, D. C.

doi:10.1016/0168-9622(91)90050-7

Cited by 34 publications

(21 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The boundary between Scaglia Variegata and Scaglia Cinerea falls at 12 m. Discrete biotite-rich layers occur at 2. 04, 5.25, 5.8, 6.5, 7.25, 7.75, 12.1, 12.7, 12.9 and 14.7 m. Biotite from layers at 7.25, 12.9 and 14.7 m provided ages of 35.4 + 0.3, 34.5 + 0.3 and 34.2 + 0.2 Ma, respectively (Montanari et al 1985;Odin et al 1991;Oberli & Meier 1991).…”

Section: Contessamentioning

confidence: 99%

“…Twenty-one biotite-rich layers emplaced as air fall volcanic ashes occur in our U -M PPCS, (Figs 5-7). As yet, K -Ar, Ar -Ar and Rb -Sr dates on pristine biotite separates have provided the geochronologic calibration of six discrete stratigraphic levels, contributing to the improvement of the accuracy of the Palaeogene time scale (Montanari et al 1985;Odin & Montanari, 1988;Oberli & Meier 1991;Odin et al 1991;Coccioni et al 2008;Fig. 8).…”

Section: The Ppcs Of the Umbria -Marche Basinmentioning

confidence: 99%

See 1 more Smart Citation

Integrated stratigraphy (magneto-, bio- and chronostratigraphy) and geochronology of the Palaeogene pelagic succession of the Umbria–Marche Basin (central Italy)

Coccioni

Sideri

Bancalà

et al. 2012

View full text Add to dashboard Cite

Extensive outcrops in the Umbria Marche Basin of central Italy include some of the most complete successions of Palaeogene sediments known from the Tethyan Realm. Owing to the continuous deposition in a pelagic setting, a rather modest tectonic overprint, the availability of excellent age control through magneto-, bio-, chemo- and tephrostratigraphy, and direct radioisotopic dates from interbedded volcaniclastic layers, these sediments have played a prominent role in the establishment of standard Palaeogene time scales. We present here a complete and well-preserved Palaeogene pelagic composite succession of the Umbria-Marche Basin, which provides the means for an accurate and precise calibration of the Palaeogene time scale. As a necessary step towards the compilation of a more robust database on a wide scale so as to improve the magneto-, bio- and chronostratigraphic framework of the classical southern Tethyan zonations, enabling regional and supraregional correlations, we have constructed a record of reliable Palaeogene planktonic foraminifera, calcareous nannofossil and dinocyst biohorizons commonly used in tropical to subtropical Cenozoic zonations. In addition, an age model is provided for the Palaeogene pelagic composite succession based on magnetostratigraphy, planktonic foraminifera and calcareous nannofossils, which contributes to an integrated chronology for the Palaeogene Tethyan sediments from c. 65.5 to 23 Ma

show abstract

Section: Contessamentioning

confidence: 99%

Section: The Ppcs Of the Umbria -Marche Basinmentioning

confidence: 99%

Integrated stratigraphy (magneto-, bio- and chronostratigraphy) and geochronology of the Palaeogene pelagic succession of the Umbria–Marche Basin (central Italy)

Coccioni

Sideri

Bancalà

et al. 2012

View full text Add to dashboard Cite

show abstract

“…The Late Cretaceous-Palaeogene portion of this spline-fit model utilized six calibration points of age-chron-distance. Of these six ages, only the youngest estimate (Eocene-Oligocene boundary has an extrapolated age of 33.7 _ 0.4 Ma and is positioned at C13r.86 (Odin et al 1991)) has not been revised by later data, revision of monitor standards, and re-evaluation of biostratigraphic calibrations.…”

Section: Revised Spreading-rate Model For the South A Tlan Ticmentioning

confidence: 99%

Astronomical calibration of the Danian time scale

Röhl

Ogg

Geib

et al. 2001

View full text Add to dashboard Cite

Ocean Drilling Program Sites 1001A (Caribbean Sea) and 1050C (western North Atlantic) display obliquity and precession cycles throughout polarity zone C27 of the late Danian stage (earliest Cenozoic time). Sliding-window spectra analysis and direct cycle counting on downhole logs and high-resolution Fe variations at both sites yield the equivalent of 35-36 obliquity cycles. This cycle-tuned duration for polarity chron C27 of 1.45 Ma (applying a modern mean obliquity period of 40.4 ka) is consistent with trends from astronomical tuning of early Danian polarity chron C29 and 4°Ar/39Ar age calibration of the Campanian-Maastrichtian magnetic polarity time scale. The cycle-tuned Danian stage (sensu Berggren et al. 1995, in SEPM Special Publications, 54, 129-212) spans 3.65 Ma (65.5-61.85 Ma). Spreading rates on a reference South Atlantic synthetic profile display progressive slowing during the Maastrichtian to Danian stages, then remained relatively constant through late Palaeocene and early Eocene time.

show abstract

“…However, it will be necessary to confirm it by dating other formations and other minerals, for two reasons: first, the state of preservation of the rock means we cannot be sure that the isotopic equilibria were perfectly preserved, and, second experience shows that only a multiple approach (different geochronometers and different dating methods) can lead to unquestionable calibrations (Odin et al, 1991a(Odin et al, , 1991b. The area of study is ready and a program is under way in that direction.…”

Section: Discussionmentioning

confidence: 95%

FIRST K-Ar DATING OF A PALEONTOLOGICALLY CONTROLLED BATHONIAN HORIZON (GEORGIA, USSR); USE OF CATHODOLUMINESCENCE TO SELECT FAVORABLE PLAGIOCLASES

Odin¹,

Hernandez

Lordkipanidze

et al. 1992

International Geology Review

View full text Add to dashboard Cite

Reliability of volcano-sedimentary biotite ages across the Eocene-Oligocene boundary (Apennines, Italy)

Cited by 34 publications

References 12 publications

Integrated stratigraphy (magneto-, bio- and chronostratigraphy) and geochronology of the Palaeogene pelagic succession of the Umbria–Marche Basin (central Italy)

Integrated stratigraphy (magneto-, bio- and chronostratigraphy) and geochronology of the Palaeogene pelagic succession of the Umbria–Marche Basin (central Italy)

Astronomical calibration of the Danian time scale

FIRST K-Ar DATING OF A PALEONTOLOGICALLY CONTROLLED BATHONIAN HORIZON (GEORGIA, USSR); USE OF CATHODOLUMINESCENCE TO SELECT FAVORABLE PLAGIOCLASES

Contact Info

Product

Resources

About