Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Microbiostratigraphy and Microfacies study of the Tarbur Formation in northeast and Southeast of Shiraz

Document Type : Original Research Paper

Authors
Khosro Khosrow Tehrani 1
Massih Afghah 2
1 Geology Department, Science and Research Unit, Islamic Azad University, Tehran, Iran
2 Geology Department, Science and Research Unit, Islamic Azad University
Abstract
      This study is based on six stratigraphic sections of Tarbur formation which names Gondashtlu, Zarghan, Kherameh-1, Kherameh-3, Kherameh-4 and Sarvestan. Over 2500 meters of Tarbur Formation and 850 thin sections are studied. Index microfacies and foraminifers are identified.
      This study shows that Tarbur Formation is divided by two parts 1- Lower part (well bedded limestone , 2- Upper part (Massive limestone).
      Index Microfacies include: wackestone, packstone, grainstone and boundstone. Amount of extraclasts in lower part of Tarbur Formation are more than of upper part, and amount of bioclasts are more than of the other of microfacies elements. The index foraminifers which are identified include:
Orbitoides media, O.apiculata, O.concavatus, O.tissoti. O.triangularis, Antalyna korayi, Laffitteina sp. Loftusia minor, Omphalocyclus macroporus, Siderolites calcitrapoides, Murciella cuvillieri,Dicyclina schlumbergeri. Coskinolina sp. Rotalia skourensis, Rotalia sp. Dictyconella complanata, D.sp., Sirtina sp., Dictyoconus sp., Vania anatolica, Lepidorbitoides minor, L.socialis, Minaxia sp., Tochospira sp., Subalveolina sp., Bolivinopsis sp., Broeckinella sp., Nezzazatinella sp., Goupillaudina shirazensis, G.sp.,
      Therefore stratigraphic limits are changed in different stratigraphic sections, but the age of Tarbur Formation is between Campanian to early Paleocene.
Keywords
Microbiostratigraphy
Tarbur Formation
Shiraz
Iran

Subjects

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Scientific Quarterly Journal of Geosciences
Volume 14, Issue 53
Autumn 2004, Vol. 14, No. 53
Autumn 2004
Pages 74-87