伊朗中部Sabzevar地区南部的伊朗牙槽藻和钙质纳米化石:生物地层、分类和古生物地理意义

IF 1.3 4区地球科学 Q3 PALEONTOLOGY

Micropaleontology Pub Date : 2021-01-01 DOI:10.47894/mpal.67.1.04

M. Hadi, L. Consorti, M. Vahidinia, M. Parandavar, Marziyeh Zoraghi

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引用次数: 2

摘要

伊朗中部Sabzevar地区南部始新世碳酸盐岩具有丰富的Alveolina组合。通过薄片详细分析，鉴定出了A. globula、Alveolina sp. 1、Alveolina affulbula、A. regularis、A. globosa、A. pasticillata、A. laxa、A. pisiformis和A. cf.deciens等9种。生物地层学结果指向早伊波斯浅底栖带SBZ6和部分SBZ7，表明下始新统碳酸盐岩体系的发育。Alveolina生物地层学与钙质纳米化石生物地层学具有相关性，可归属于NP10带中部，特别是CNE2生物带。本文认为A. globula的进化趋势及其在新特提斯洋西部和中部的扩散与Alveolina sp.的出现有关。

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Ypresian Alveolina and calcareous nannofossils from the south Sabzevar area (Central Iran): biostratigraphic, taxonomic and paleobiogeographic implications

The Eocene carbonates of the south Sabzevar region in central Iran hold a rich Alveolina assemblage.Nine species including A. globula, Alveolina sp. 1, Alveolina aff. globula, A. regularis, A. globosa, A. pasticillata, A. laxa, A. pisiformis and A. cf. decipiens are identified through detailed analysis in thin section. The biostratigraphy obtained points to the early Ypresian Shallow Benthic Zones SBZ6 and partly SBZ7, indicating the occurrence of a lower Eocene carbonate system. The Alveolina biostratigraphy is correlated to the calcareous nannofossil biostratigraphy, and is assignable to the middle part of the NP10 Zone and especially with the CNE2 biozones. The evolutionary trends of A. globula and its dispersal through thewestern and central Neo-Tethys Ocean during theYpresian is here considered in relation with the occurrence of Alveolina sp. 1.

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来源期刊

Micropaleontology 地学-古生物学

CiteScore

3.20

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Micropalaeontology (JM) is an established international journal covering all aspects of microfossils and their application to both applied studies and basic research. In particular we welcome submissions relating to microfossils and their application to palaeoceanography, palaeoclimatology, palaeobiology, evolution, taxonomy, environmental change and molecular phylogeny. Owned by The Micropalaeontological Society, the scope of the journal is broad, demonstrating the application of microfossils to solving broad geoscience issues.