维也纳盆地(斯洛伐克)上巴登统碳酸盐岩和硅质岩近岸层的生物地层学和古生态学

IF 1.8 3区 地球科学 Q1 GEOLOGY Facies Pub Date : 2024-01-29 DOI:10.1007/s10347-023-00679-2
Michal Jamrich, Samuel Rybár, Andrej Ruman, Marianna Kováčová, Natália Hudáčková
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引用次数: 0

摘要

本研究全面考察了源于中帕拉蒂西大陆维也纳盆地上巴登世(中新世中期)地层的藻类生物herm结构,包括含有浮游动物和有孔虫的礁石和地毯。这些岩相主要由碳酸盐红藻属 Lithothamnion 组成。该研究通过结合钙质浮游动物、有孔虫、沉积学和古生物学的综合方法,对维也纳盆地的塞拉瓦利安(上巴登纪)沉积物进行了探索。生物地层年龄与 NN6 和 CPN9 区一致,87Sr/86Sr 测定进一步证实了这一点。这项研究强调了岩石学过程和古生态学代用指标在小尺度特征描述和探测古环境条件短期变化方面的重要性。这些独特的生物热结构对维也纳盆地的一个石灰岩地层(桑德伯格地层)进行了新的描述,该地层似乎普遍存在于中帕拉特提斯地区。这些发现支持了地中海与中帕拉泰西之间通过跨泰西海沟走廊建立深远联系的假设,维也纳盆地东部周边观察到的上升流条件也为这一假设提供了支持。证实了中帕拉泰西地区上巴登纪碳酸盐增长的两个主要抑制机制:第一是来自阿尔卑斯山和喀尔巴阡山脉的大量硅质岩流入,并得到维也纳盆地和多瑙河盆地持续断裂的支持;第二是外喀尔巴阡盆地和外兴安岭盆地蒸发岩的传播导致降水,从而破坏了碳酸盐的增长。这项调查强调了中新世期间区域地球动力学与碳酸盐沉积过程之间相互交织的关系。
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Biostratigraphy and paleoecology of the upper Badenian carbonate and siliciclastic nearshore facies in the Vienna Basin (Slovakia)

This study provides a comprehensive examination of algal bioherm structures, including reefs and carpets that contain nannoplankton and foraminifera, originating from the upper Badenian (middle Miocene) strata of the Vienna Basin in the Central Paratethys. These lithofacies primarily consist of the carbonate red algal genus Lithothamnion. Through an integrated approach that combines calcareous nannoplankton, foraminifera, sedimentology, and palynology, the study explores the Serravallian (upper Badenian) sediments from the Vienna Basin. The biostratigraphic age, consistent with the NN6 and CPN9 zones, is further corroborated by 87Sr/86Sr dating. This research highlights the importance of taphonomic processes and paleoecological proxies in small-scale characterization and detecting short-term shifts within paleoenvironmental conditions. These unique bioherm structures enable a novel description of a limestone formation within the Vienna Basin (Sandberg Formation), which seems pervasive across the Central Paratethys region. The findings uphold the hypothesis of a profound connection between the Mediterranean and Central Paratethys via the Trans-Tethyan Trench Corridor, bolstered by upwelling conditions observed in the eastern perimeter of the Vienna Basin. Two main inhibitory mechanisms for carbonate growth in the Upper Badenian within the Central Paratethys area are confirmed: the first is a substantial siliciclastic influx from the Alps and Carpathians, supported by the ongoing rifting of the Vienna and Danube Basins; the second is the propagation of evaporites in the Transcarpathian and Transylvanian Basins leading to precipitation, which disrupts carbonate growth. This investigation underlines the intertwined relationship between regional geodynamics and carbonate sedimentation processes during the Miocene.

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来源期刊
Facies
Facies 地学-地质学
CiteScore
3.70
自引率
5.60%
发文量
15
审稿时长
>12 weeks
期刊介绍: The journal is open to papers dealing with the interpretation of ancient and modern biotopes and carbonate depositional environments by means of facies analysis in its broadest sense. Once the central part of research in hydrocarbon exploration, facies analysis more and more integrates modern and ancient biogeological processes of a changing earth. Special emphasis is laid on paleobiology and -ecology, basin evolution, sedimentology including diagenesis and geochemistry, as well as studies emphasising the impact of life on earth history. The main part of the target group will be people in academia.
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