环北极地区的三叠纪晚期事件

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-03-14 DOI:10.4138/ATLGEOL.2021.005

Gunn Mangerud, N. Paterson, J. Bujak

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引用次数: 3

摘要

现今北极的三叠纪序列包含了丰富多样的非海相孢粉组合，这些组合提供了重要的生物地层学信息。甲藻囊肿在生物地层学上可用于上三叠世的海洋层段。根据已发表的记录，我们汇编了78次末次出现（LOs）、首次出现（FOs）和一些预计在北极地区具有相关性潜力的丰度事件。许多北极地区都开展了孢粉学研究，对挪威巴伦支海和斯瓦尔巴群岛的三叠纪序列发表了广泛的孢粉学研究。该地区存在一个更新的、最近的孢粉分带方案，整合了以前的方案，说明了三叠纪孢粉学的年代地层价值。对于下三叠统和中三叠统，良好的菊石控制将孢粉带与年代地层尺度联系起来。上三叠统独立控制稀疏，分辨率较低，因此孢粉学通常是唯一可用于年代地层定年和对比的生物地层学学科。

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Triassic palynoevents in the circum-Arctic region

Triassic successions of the present-day Arctic contain abundant and diverse assemblages of nonmarine palynomorphs that have provided important biostratigraphic information. Dinoflagellate cyst are biostratigraphically useful in marine intervals in the Upper Triassic. Based on published records, we present a compilation of 78 last occurrences (LOs), first occurrences (FOs), and some abundance events that are anticipated to have correlation potential in the Arctic region. Palynological work has been carried out in many Arctic areas, with extensive palynological research published on the Triassic successions of the Norwegian Barents Sea and Svalbard. An updated, recent palynological zonation scheme exists for that region, integrating previous schemes and illustrating the chronostratigraphic value of palynology in the Triassic. For the Lower and Middle Triassic, good ammonoid control ties the palynological zones to the chronostratigraphic scale. Independent control is sparse, and resolution is lower in the Upper Triassic, so that palynology is commonly the only biostratigraphic discipline available for chronostratigraphic dating and correlation.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.