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Kalanat, Behnaz, Gharaie, Mohammad Hosein, Vahidinia, Mohamad, Vaziri-Moghaddam, Hossein, Kano, Akihiro. (1395). Nitrogen isotope variations and environmental perturbations during Cenomanian-Turonian transition in the NE Tethyan realm, Koppeh-Dagh basin. , 7(1), 1-9. doi: 10.22059/geope.2016.59787
Behnaz Kalanat; Mohammad Hosein Gharaie; Mohamad Vahidinia; Hossein Vaziri-Moghaddam; Akihiro Kano. "Nitrogen isotope variations and environmental perturbations during Cenomanian-Turonian transition in the NE Tethyan realm, Koppeh-Dagh basin". , 7, 1, 1395, 1-9. doi: 10.22059/geope.2016.59787
Kalanat, Behnaz, Gharaie, Mohammad Hosein, Vahidinia, Mohamad, Vaziri-Moghaddam, Hossein, Kano, Akihiro. (1395). 'Nitrogen isotope variations and environmental perturbations during Cenomanian-Turonian transition in the NE Tethyan realm, Koppeh-Dagh basin', , 7(1), pp. 1-9. doi: 10.22059/geope.2016.59787
Kalanat, Behnaz, Gharaie, Mohammad Hosein, Vahidinia, Mohamad, Vaziri-Moghaddam, Hossein, Kano, Akihiro. Nitrogen isotope variations and environmental perturbations during Cenomanian-Turonian transition in the NE Tethyan realm, Koppeh-Dagh basin. , 1395; 7(1): 1-9. doi: 10.22059/geope.2016.59787

Nitrogen isotope variations and environmental perturbations during Cenomanian-Turonian transition in the NE Tethyan realm, Koppeh-Dagh basin

Geopersia
مقاله 1، دوره 7، شماره 1 - شماره پیاپی 22287825، فروردین 2017، صفحه 1-9    اصل مقاله (592.54 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22059/geope.2016.59787
نویسندگان
Behnaz Kalanat1؛ Mohammad Hosein Gharaie* 1؛ Mohamad Vahidinia1؛ Hossein Vaziri-Moghaddam2؛ Akihiro Kano3
1Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
2Department of Geology, Faculty of Science, University of Isfahan, Isfahan, Iran
3Department of Environmental Changes, Faculty of Social and Cultural Studies, Kyushu University, Fukuoka, Japan
چکیده
The Cenomanian-Turonian Gharesu section in the east of Kopet-Dagh basin have been investigated to determine the relationship between palaeoenvironmental perturbations and nitrogen cycling across OAE2. This succession is composed of 43 m shale and marl interbedded with glauconitic sandstone and lies between Aitamir-Abderaz formations boundary. The nitrogen Isotope values fluctuate between 0‰ to +3‰ and TOC/TN ratios range from 3.5 to 20.5 in this section. The TOC/TN exhibits high ratios in the organic-rich sediments which were deposited in a low-oxygen environment because nitrogen-rich organic matter was preferably degraded in this condition. The δ15N values are also low in the organic-rich sediments which indicate a nitrogen fixation process as a consequence of greenhouse climate, enhanced productivity and expanded oxygen minimum zone during OAE2.
کلیدواژه‌ها
Kopet-Dagh basin؛ environmental perturbations؛ nitrogen isotope؛ OAE2؛ TOC/TN ratio
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