The paper presents new 40Ar/39Ar age determination of basalts from the Franz Josef Land archipelago. The obtained set of dates confirms the predominance of products only of Early Cretaceous age, which is also confirmed by results of paleomagnetic studies. Analysis of the entire set of geochronological data, taking into account information on their magnetic polarity, indicates that the interval of active magmatism occurred at the latest Barremian–Aptian and corresponds to the beginning of the Cretaceous Normal Superchron (C34n) at about 125 Ma. Significantly older age estimates are not related to the time of formation of the FJL basalts as a part of the High Arctic Large Igneous Province.

中文翻译：

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弗朗兹约瑟夫地群岛早白垩世玄武岩：新 40Ar/39Ar 与古地磁数据的对应关系

本文介绍了弗朗兹约瑟夫地群岛玄武岩的新 40Ar/39Ar 年龄测定方法。所获得的一组日期证实了仅早白垩世产品的优势，这也得到了古地磁研究结果的证实。对整套地质年代学数据进行分析，考虑到它们的磁极性信息，表明活动岩浆作用的间隔发生在最新的巴雷米亚-阿普蒂安期，对应于大约 125 Ma 的白垩纪正超纪元（C34n）的开始。显着更老的年龄估计与作为高北极大火成岩省一部分的 FJL 玄武岩的形成时间无关。