پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 158 |
| تعداد شماره‌ها | 6,225 |
| تعداد مقالات | 67,685 |
| تعداد مشاهده مقاله | 114,996,757 |
| تعداد دریافت فایل اصل مقاله | 89,669,567 |
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 | ||
| عنوان مقاله [English] | ||
| Late Maastrichtian benthic foraminiferal response to palaeoenvironmental changes: a case study from the AbTalkh Formation, west of Kopeh-Dagh Basin, Iran | ||
| نویسندگان [English] | ||
| Shemshad Ghoorchaei؛ Mohammad Vahidinia؛ Alireza Ashoori | ||
| چکیده [English] | ||
| 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. | ||
|
آمار تعداد مشاهده مقاله: 2,401 تعداد دریافت فایل اصل مقاله: 2,319 |
||