Development of a non-perennial to ephemeral fluvial system in continental fault-bounded basin – an example from the early Permian Krajanów Formation of the Intra-Sudetic Basin (NE Bohemian Massif)

IF 0.9 4区 地球科学 Q3 GEOLOGY Geological Quarterly Pub Date : 2023-10-10 DOI:10.7306/gq.1701
Aleksander KOWALSKI, Magdalena FURCA
{"title":"Development of a non-perennial to ephemeral fluvial system in continental fault-bounded basin – an example from the early Permian Krajanów Formation of the Intra-Sudetic Basin (NE Bohemian Massif)","authors":"Aleksander KOWALSKI, Magdalena FURCA","doi":"10.7306/gq.1701","DOIUrl":null,"url":null,"abstract":"Non-perennial to ephemeral fluvial systems dominated by seasonal discharge fluctuations and episodic rapid flood-flow events are typical of arid to semi-arid climatic conditions. Dryland fluvial systems have been described from many ancient and modern, predominantly tectonically-controlled sedimentary basins across the globe. This study provides detailed sedimentological analysis and palaeoenvironmental interpretation of the lowermost part of the early Permian (?Asselian) Krajanów Formation exposed within the continental, fault-bounded Intra-Sudetic Basin (ISB), located on the NE periphery of Bohemian Massif. High-resolution sedimentological logging and facies analysis indicate that the early Permian fluvial system in this area was dominated by ephemeral fluvial processes influenced strongly by a semi-arid to arid climate. Rapid (?catastrophic) flood events led to episodic sedimentation of vertically and laterally amalgamated fluvial channel infills, with abundant upper flow regime structures as well as poorly channelized, laterally extensive sheet-like bodies of sandstone. The overbank deposits are poorly preserved due to frequent lateral shifting of the channels. Soft-sediment deformation structures formed due to events of river bank collapse as well as debris flow facies point to high-energy, waning flows. It is concluded that deposition occurred on broad, terminal-type alluvial fans, probably in their proximal- to medial segments within a distributive fluvial system of the Permian Intra-Sudetic Basin. Petrographic composition and measured palaeocurrent directions show that the sediment was sourced from the neighbouring massifs – the Sowie Mts. Massif to the east, the Bardo Structure and a hypothetical Southern Massif to the south/south-east.","PeriodicalId":12587,"journal":{"name":"Geological Quarterly","volume":"59 1","pages":"0"},"PeriodicalIF":0.9000,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geological Quarterly","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.7306/gq.1701","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Non-perennial to ephemeral fluvial systems dominated by seasonal discharge fluctuations and episodic rapid flood-flow events are typical of arid to semi-arid climatic conditions. Dryland fluvial systems have been described from many ancient and modern, predominantly tectonically-controlled sedimentary basins across the globe. This study provides detailed sedimentological analysis and palaeoenvironmental interpretation of the lowermost part of the early Permian (?Asselian) Krajanów Formation exposed within the continental, fault-bounded Intra-Sudetic Basin (ISB), located on the NE periphery of Bohemian Massif. High-resolution sedimentological logging and facies analysis indicate that the early Permian fluvial system in this area was dominated by ephemeral fluvial processes influenced strongly by a semi-arid to arid climate. Rapid (?catastrophic) flood events led to episodic sedimentation of vertically and laterally amalgamated fluvial channel infills, with abundant upper flow regime structures as well as poorly channelized, laterally extensive sheet-like bodies of sandstone. The overbank deposits are poorly preserved due to frequent lateral shifting of the channels. Soft-sediment deformation structures formed due to events of river bank collapse as well as debris flow facies point to high-energy, waning flows. It is concluded that deposition occurred on broad, terminal-type alluvial fans, probably in their proximal- to medial segments within a distributive fluvial system of the Permian Intra-Sudetic Basin. Petrographic composition and measured palaeocurrent directions show that the sediment was sourced from the neighbouring massifs – the Sowie Mts. Massif to the east, the Bardo Structure and a hypothetical Southern Massif to the south/south-east.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
陆相断界盆地非多年生到短暂性河流体系的发育——以早二叠世Krajanów苏德海内盆地(东波希米亚地块)的形成为例
以季节性流量波动和幕式快速洪水事件为主的非多年生至短暂河流系统是干旱至半干旱气候条件的典型特征。旱地河流系统已经被描述从许多古代和现代,主要是构造控制的沉积盆地遍布全球。本研究对位于波西米亚地块东北缘的苏德内断陷陆相盆地(ISB)内暴露的早二叠世(?Asselian) Krajanów组下部进行了详细的沉积学分析和古环境解释。高分辨率沉积学测井和相分析表明,该地区早二叠世河流体系以短暂的河流作用为主,受半干旱至干旱气候的强烈影响。快速(灾难性)洪水事件导致纵向和横向合并河道填充物的幕式沉积,具有丰富的上游流态结构以及河道化程度较差的横向广泛的片状砂岩体。由于河道的频繁横向移动,河岸上的沉积物保存较差。由于河岸坍塌事件和泥石流相形成的软沉积物变形构造指向高能、衰减流。结论认为,沉积发生在二叠纪苏德海内盆地的一个分布河流体系中,可能发生在其近端至中部的宽端型冲积扇上。岩石组成和测量的古水流方向表明,沉积物来自邻近的地块-东部的索伊山地块,巴杜构造和南部/东南部的一个假设的南部地块。
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 去求助
来源期刊
Geological Quarterly
Geological Quarterly 地学-地质学
CiteScore
2.20
自引率
0.00%
发文量
19
审稿时长
>12 weeks
期刊介绍: The policy of the Geological Quarterly is to publish significant contributions of information and geological insight relevant to an international readership. The journal has been issued since 1957 at the Polish Geological Institute - National Research Institute and, at present, is the leading Earth sciences journal in Poland. All aspects of Earth and related sciences, and universal and broad regional rather than locally oriented topics are covered. The journal is intended to be an international forum for the exchange of information and ideas, particularly on important geological topics of Central Europe.
期刊最新文献
Mazovian Interglacial sites in the Sosnowica Depression and the Parczew-Kodeń Heights (Western Polesie, SE Poland), and their stratigraphic, palaeogeographic and palaeoenvironmental significance Remains of Canidae and Felidae from Południowa Cave (Sudetes Mts, SW Poland) ERT field survey supported with numerical and analogue modeling applied to study a fragment of the Pieniny Klippen Belt (Spisz Pieniny Mountains, southern Poland) Fluid and solid inclusions in large halite veins in the Kłodawa Salt Dome (Central Poland) – insights into its development Evolution of the hydrographic network in the middle Wieprz River Basin (E Poland)
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1