Sequence analysis, cyclostratigraphy and palynofacies of early Anisian carbonate ramp deposits, NW Bulgaria

IF 1.2 4区地球科学 Q2 GEOLOGY

Annales Societatis Geologorum Poloniae Pub Date : 2020-01-01 DOI:10.14241/ASGP.2020.27

G. Ajdanlijsky, A. Strasser, A. Götz

{"title":"Sequence analysis, cyclostratigraphy and palynofacies of early Anisian carbonate ramp deposits, NW Bulgaria","authors":"G. Ajdanlijsky, A. Strasser, A. Götz","doi":"10.14241/ASGP.2020.27","DOIUrl":null,"url":null,"abstract":"A sequence- and cyclostratigraphic interpretation of early Anisian (Aegean) shallow-marine carbonate ramp deposits, exposed in outcrop sections west of Tserovo village, NW Bulgaria, is presented. The hierarchical pattern identified can be interpreted in terms of Milankovitch cyclicity with elementary sequences representing the precession (20-kyr) cycle, small-scale sequences the short eccentricity (100-kyr), and medium-scale sequences the long eccentricity (400-kyr) cycle. Palynology provides a robust stratigraphic framework. The study of sedimentary organic matter, revealing variations of terrestrial input, sorting and fragmentation of phytoclasts, and prominent acritarch peaks, allows the interpretation of environmental changes and contributes to the cyclostratigraphic and sequence-stratigraphic framework. The detailed documentation of syndepositional soft-sediment deformation structures confirms their laterally traceable distribution within the depositional sequences and makes them good palaeoenvironmental indicators. Anisian ramp systems of the western Tethyan realm thus were subjected to highly dynamic regimes, recording the interplay between sea-level changes in tune with orbital cycles and ramp morphology.","PeriodicalId":50776,"journal":{"name":"Annales Societatis Geologorum Poloniae","volume":"1 1","pages":""},"PeriodicalIF":1.2000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annales Societatis Geologorum Poloniae","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.14241/ASGP.2020.27","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOLOGY","Score":null,"Total":0}

引用次数: 1

Abstract

A sequence- and cyclostratigraphic interpretation of early Anisian (Aegean) shallow-marine carbonate ramp deposits, exposed in outcrop sections west of Tserovo village, NW Bulgaria, is presented. The hierarchical pattern identified can be interpreted in terms of Milankovitch cyclicity with elementary sequences representing the precession (20-kyr) cycle, small-scale sequences the short eccentricity (100-kyr), and medium-scale sequences the long eccentricity (400-kyr) cycle. Palynology provides a robust stratigraphic framework. The study of sedimentary organic matter, revealing variations of terrestrial input, sorting and fragmentation of phytoclasts, and prominent acritarch peaks, allows the interpretation of environmental changes and contributes to the cyclostratigraphic and sequence-stratigraphic framework. The detailed documentation of syndepositional soft-sediment deformation structures confirms their laterally traceable distribution within the depositional sequences and makes them good palaeoenvironmental indicators. Anisian ramp systems of the western Tethyan realm thus were subjected to highly dynamic regimes, recording the interplay between sea-level changes in tune with orbital cycles and ramp morphology.

查看原文本刊更多论文

保加利亚西北部早安尼期碳酸盐斜坡沉积层序分析、旋回地层及孢粉相

本文介绍了在保加利亚西北部Tserovo村西部露头剖面中发现的早期Anisian(爱琴海)浅海碳酸盐斜坡沉积的层序和旋回地层解释。该层次化模式可以用Milankovitch旋回来解释:初级层序代表进动(20 kyr)旋回，小尺度层序代表短偏心(100 kyr)旋回，中等尺度层序代表长偏心(400 kyr)旋回。孢粉学提供了一个强有力的地层框架。对沉积有机质的研究，揭示了陆源输入的变化、植物碎屑的分选和破碎，以及突出的顶拱峰，有助于解释环境变化，并有助于旋回地层和层序地层格架。同沉积软沉积变形构造的详细记录证实了其在沉积层序中的横向可追溯分布，是良好的古环境指示物。因此，西特提斯王国的阿尼西亚坡道系统受到高度动态的制度的影响，记录了海平面变化与轨道周期和坡道形态之间的相互作用。

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

Annales Societatis Geologorum Poloniae 地学-地质学

CiteScore

2.60

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： Annales Societatis Geologorum Poloniae (ASGP) is the scientific journal of the Polish Geological Society. Original contributions and review articles are considered for publication in Annales Societatis Geologorum Poloniae. Submissions for publication may be from all branches of the geological sciences, including applied and economic geology, as well as discussions of papers, previously published in the journal. The language of the journal is English.