Geopersia, Volume (7), No (1), Year (2017-1) , Pages (1-9)

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

Authors: behnaz kalanat , Mohamad Hosein Mahmudy Gharaie , Mohammad Vahidinia , H. Vaziri-Moghaddam , A. Kano ,

Citation: BibTeX | EndNote

Abstract

The Cenomanian-Turonian Gharesu section in the east of Koppeh-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.

Keywords

, Koppeh-Dagh Basin, Environmental Perturbations, Nitrogen Isotope, OAE2, TOC/TN Ratio
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@article{paperid:1064910,
author = {Kalanat, Behnaz and Mahmudy Gharaie, Mohamad Hosein and Vahidinia, Mohammad and H. Vaziri-Moghaddam and A. Kano},
title = {Nitrogen isotope variations and environmental perturbations during Cenomanian-Turonian transition in the NE Tethyan realm, Koppeh-Dagh basin},
journal = {Geopersia},
year = {2017},
volume = {7},
number = {1},
month = {January},
issn = {2228-7817},
pages = {1--9},
numpages = {8},
keywords = {Koppeh-Dagh Basin; Environmental Perturbations; Nitrogen Isotope; OAE2; TOC/TN Ratio},
}

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%0 Journal Article
%T Nitrogen isotope variations and environmental perturbations during Cenomanian-Turonian transition in the NE Tethyan realm, Koppeh-Dagh basin
%A Kalanat, Behnaz
%A Mahmudy Gharaie, Mohamad Hosein
%A Vahidinia, Mohammad
%A H. Vaziri-Moghaddam
%A A. Kano
%J Geopersia
%@ 2228-7817
%D 2017

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