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Ghoorchaei, Shemshad, Vahidinia, Mohammad, Ashoori, Alireza. (1391). Late Maastrichtian benthic foraminiferal response to palaeoenvironmental changes: a case study from the AbTalkh Formation, west of Kopeh-Dagh Basin, Iran. , 2(2), 25-42. doi: 10.22059/jgeope.2012.29230
Shemshad Ghoorchaei; Mohammad Vahidinia; Alireza Ashoori. "Late Maastrichtian benthic foraminiferal response to palaeoenvironmental changes: a case study from the AbTalkh Formation, west of Kopeh-Dagh Basin, Iran". , 2, 2, 1391, 25-42. doi: 10.22059/jgeope.2012.29230
Ghoorchaei, Shemshad, Vahidinia, Mohammad, Ashoori, Alireza. (1391). 'Late Maastrichtian benthic foraminiferal response to palaeoenvironmental changes: a case study from the AbTalkh Formation, west of Kopeh-Dagh Basin, Iran', , 2(2), pp. 25-42. doi: 10.22059/jgeope.2012.29230
Ghoorchaei, Shemshad, Vahidinia, Mohammad, Ashoori, Alireza. Late Maastrichtian benthic foraminiferal response to palaeoenvironmental changes: a case study from the AbTalkh Formation, west of Kopeh-Dagh Basin, Iran. , 1391; 2(2): 25-42. doi: 10.22059/jgeope.2012.29230

Late Maastrichtian benthic foraminiferal response to palaeoenvironmental changes: a case study from the AbTalkh Formation, west of Kopeh-Dagh Basin, Iran

Geopersia
مقاله 3، دوره 2، شماره 2 - شماره پیاپی 1228511، اسفند 2012، صفحه 25-42    اصل مقاله (1.06 M)
شناسه دیجیتال (DOI): 10.22059/jgeope.2012.29230
نویسندگان
Shemshad Ghoorchaei؛ Mohammad Vahidinia؛ Alireza Ashoori
Ferdowsi University of Mashhad
چکیده
Benthic foraminiferal assemblages from Maastrichtian strata, Gansserina gansseri-Abathamphalus mayaroensis Planktonic Foraminiferal Zone, of the AbTalkh Formation at Aitamir section (west of the Kopeh-Dagh basin) were investigated in order to evaluate the palaeoenvironmental changes (organic matter flux and bottom-water oxygenation). Maastrichtian faunal assemblages are well preserved and diversified. Fluctuations in the percentage of infaunal and epifaunal morphogroups as well as simple diversity and heterogeneity index are recorded. The study indicates that an unstable environment with oligotrophic to weakly mesotrophic condition and high oxygenated bottom water condition was prevailed during the depositionof the sediments in the latest Cretaceous.
کلیدواژه‌ها
Benthic Foraminifera؛ Iran؛ Kopeh- Dagh basin؛ Maastrichtian؛ Palaeoenvironment
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