40Ar/39Ar geochronology of Burdigalian paleobotanical localities in the central Paratethys (south Slovakia)

IF 1.3 4区地球科学 Q2 GEOLOGY

Geologica Acta Pub Date : 2021-05-21 DOI:10.1344/GEOLOGICAACTA2021.19.5

Katarína Šarinová, S. Rybár, F. Jourdan, C. Mayers, A. Frew, M. Kováčová, Petronela Nováková, Barbara Lichtman, M. Kováč

引用次数: 4

Abstract

The Lipovany and Mucin paleobotanical localities contain important floral associations within the tuff horizons, which were used for determination of subtropical to tropical climatic conditions during the Early Miocene. Based on the combination of results from plagioclase and biotite 40 Ar/ 39 Ar dating, the age of the tuff deposition is around 17.3Ma. For the Lipovany locality, single-grain 40 Ar/ 39 Ar convergent ages of 17.49±0.54Ma and 17.28±0.06Ma, for plagioclase and biotite were obtained, respectively. The Mucin locality only provide an imprecise convergent age of 16.5±1.4Ma due to the small size of the analyzed plagioclase crystals. The results thus allowed to include the fossil subtropical flora of the studied localities in the late Ottnangian regional stage (upper part of the Burdigalian). Additionally, these age data indicate that deposition of the overlaying Salgotarjan Formation starts much later than originally thought (during Ottnangian-Karpatian boundary).

查看原文本刊更多论文

Paratethys中部（斯洛伐克南部）Burdigalian古植物区的40Ar/39Ar地质年代

Lipovany和Mucin古植物区在凝灰岩层中包含重要的植物组合，用于确定中新世早期的亚热带至热带气候条件。根据斜长石和黑云母40Ar/39Ar定年的结果，凝灰岩沉积的年龄约为17.3Ma。在Lipovany地区，斜长石和黑云母的单颗粒40Ar/39Ar会聚年龄分别为17.49±0.54Ma和17.28±0.06Ma。由于分析的斜长石晶体尺寸较小，Mucin位置仅提供16.5±1.4Ma的不精确收敛年龄。因此，研究结果包括了所研究地区在Ottnagian晚期区域阶段（Burdigalian的上部）的亚热带植物群化石。此外，这些年龄数据表明，上覆Salgotarjan组的沉积开始时间比最初认为的要晚得多（在Ottnagian-Karpatian边界期间）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geologica Acta 地学-地质学

CiteScore

2.50

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： - Relevant conceptual developments in any area of the Earth Sciences. - Studies presenting regional synthesis. - Thematic issues or monographic volumes presenting the results from one or more research groups. - Short papers reflecting interesting results or works in progress. - Contributions and results from Research Projects, Workshops, Symposiums, Congresses and any relevant scientific activity related to Earth Sciences. - Geologica Acta aims to stimulate rapid diffusion of results and efficient exchange of ideas between the widespread communities of Earth Science researchers (with special emphasis on Latinamerica, the Caribbean, Europe, the Mediterranean