伊朗东北部Koppeh-Dagh盆地上白垩统Abderaz组浮游有孔虫和鞭毛虫囊

IF 0.9 3区地球科学 Q3 GEOLOGY

Stratigraphy Pub Date : 2018-03-12 DOI:10.29041/strat.15.1.47-66

Elham Davtalab, M. Vahidinia, E. Ghasemi-Nejad, A. Ashouri

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引用次数: 4

摘要

在伊朗东北部Koppeh-Dagh盆地东部Abderaz组359 m厚的Padeha-Baghak复合剖面上研究了浮游有孔虫和鞭毛虫囊的组合。地层主要由浅灰色页岩和泥灰岩组成，上部为3层白垩质灰岩。发现浮游有孔虫9属44种，鞭毛虫39属85种。浮游有孔虫可分为4个生物带(Dicarinella primitiva - marinotruncana sigali)、Dicarinella concavata、Dicarinella asymmetrica和Globotruncanita elevata)。识别出2个藻囊超带(Conosphaeridium striatoconum超带和下部Odontochitina porifera超带)和7个间隔带。这些生物带表明Koppeh-Dagh盆地的Abderaz组处于turonian晚期- Campanian早期。

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Planktonic foraminifera and dinoflagellate cysts from the Upper Cretaceous Abderaz Formation in the Koppeh-Dagh Basin, NE Iran

Assemblages of planktonic foraminifera and dinoflagellate cysts were studied from the 359 m thick Padeha-Baghak composite section of the Abderaz Formation, eastern Koppeh-Dagh Basin, NE Iran. The formation consists mainly of light grey shales and marls with three chalky limestone beds in the upper part. Nine genera and 44 species of planktonic foraminifera and 39 genera and 85 species of dinoflagellate cysts are identified. Planktonic foraminifera are attributed to four biozones (Dicarinella primitiva–Marginotruncana sigali, Dicarinella concavata, Dicarinella asymetrica and Globotruncanita elevata zones). Two dinocyst superzones (Conosphaeridium striatoconum Superzone and the lower part of the Odontochitina porifera Superzone) with seven interval zones are recognized. These biozones suggest a late Turonian–early Campanian age for the Abderaz Formation in this part of the Koppeh-Dagh Basin.

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来源期刊

Stratigraphy 地学-地质学

CiteScore

1.80

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： The journal’s mission is to publish peer-reviewed papers that use modern stratigraphic tools – biostratigraphy, chemostratigraphy, magnetostratigraphy, cyclostratigraphy, sequence stratigraphy, climatostratigraphy, lithostratigraphy, GSSPs and more – to explore broad ideas in earth history.