1887

Abstract

Summary

For doing sequence stratigraphy on Eocene rocks of the High-Zagros in Iran, finding accurate age of samples was necessary, so we chose two sections (Hamzeh-Ali and Shalamzar) and studied on benthic and pelagic foraminifers, but age of some index benthic foraminifera was too long and extension of pelagic foraminifera narrow thus we used of strontium dating for earning the precise age of the sections for understanding this momentous. Some samples were selected for strontium dating analyses because of lithology and texture. The strontium isotope seawater curve for the Early to Middle Eocene has been earned by samples from sections. The lowest 87Sr/86Sr values belonged to Early Eocene at ~52 Ma and generally increased throughout the Middle Eocene at ~45 Ma. These results are exactly confirmed by benthic and pelagic foraminifera. A credible explanation for the 87Sr/86Sr increased between 52 to 45 Ma is stagnancy for volcanic activities at Middle Eocene. Although, the strontium isotope values increased toward middle Eocene but sea level changed to be shallower environment.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201602391
2016-12-05
2020-04-03
Loading full text...

Full text loading...

References

  1. Berggren, W.A., Kent, D.V., Swisher, C.C.III, Aubry, M.P.
    , [1995b] A revised Cenozoic geochronology and chronostratigraphy. In: Berggren, W.A., Kent, D.V., Aubry, M.P., Hardenbol, J., (Eds.), Geochronology, Time Scales and Global Stratigraphic Correlation: A Unified Temporal Framework for an Historical Geology. SEPM Special Publications, 54, 129–212.
    [Google Scholar]
  2. Bolli, H.M., Saunders, J.B., Perch-Nielson, K.
    [1985] Plankton stratigraphy. Cambridge University Press, 1032.
    [Google Scholar]
  3. Davies, L.M.
    [1940] The Upper Khirtar beds of North West India. Quarterly Journal of the Geological Society, 96, 199–230.
    [Google Scholar]
  4. Hottinger, L.
    [1960a] Recherches sur les Alveolines du Paleocene et de l'Eocene. Memoires Suisses de Paleontologie, 75–76, 1–243.
    [Google Scholar]
  5. [2007] Revision of the foraminiferal genus Globoreticulina Rahaghi, 1978, and of its associated fauna of larger foraminifera from the late Middle Eocene of Iran. Carnets de Géologie/ Notebooks on Geology, Article 2007/06, 1–51.
    [Google Scholar]
  6. Less, G.
    [1987] Paleontology and stratigraphy of the European Orthophragminae. Geologica Hungarica, Series Palaeontologica, 51, 1–373.
    [Google Scholar]
  7. Liu, Y.W., Aciego, S.M., Wanamaker, A.D.Jr.
    [2015] Environmental controls on the boron and strontium isotopic composition of aragonite shell material of cultured Arctica islandica. Biogeosciences, 12, 3351–3368.
    [Google Scholar]
  8. Pearson, P.N., Olsson, R.K., Huber, B.T., Hemleben, C., Berggren, W.A.
    [2006] Atlas of Eocene Planktonic Foraminifera. Cushman Foundation, Special Publication, 41, 517.
    [Google Scholar]
  9. Schaub, H.
    , [1981] Nummulites et Assilines de la Téthys Paléogène, taxinomie, phylogenèse et biostratigraphie. Schweizerische Paläontologische Abhandlungen, 104–106, 1–236.
    [Google Scholar]
  10. Serra-Kiel, J., Hottinger, L., Caus, E., Drobne, K., Ferrandez, C., Kumar Jauhri, A., Less, G., Pavlovec, R., Pignatti, J., Maria Samso, J., Schaub, H., Sirel, E., Strougo, A., Tambareau, Y., Tosquella, J., Zakrevskaya, E.
    [1998] Larger foraminiferal biostratigraphy of the Tethyan Paleocene and Eocene. Bulletin de la Societe Geologique de France, 169,(2), 281–299.
    [Google Scholar]
  11. Wynd, T.
    [1965] Biofacies of Iranian oil consortium agreement area. Iranian Oil Offshore Company, Report No. 1082, unpublished.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201602391
Loading
/content/papers/10.3997/2214-4609.201602391
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error