基于新的和老的多道反射地震数据的波兰近海前寒武纪和古生代平台边界带的后卡利登构造演化

IF 3.2 2区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS
Quang Nguyen, Michal Malinowski, Stanisław Mazur, Sergiy Stovba, Małgorzata Ponikowska, Christian Hübscher
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引用次数: 0

摘要

摘要由于优质地震数据稀少和油井数据不足,波罗的海波兰地区前寒武纪向古生代地台过渡的后卡利登时期沉积覆盖层的结构一直是一个争论不休的问题。2016 年新获得的高分辨率 BalTec 地震数据为破译该地区的区域地质做出了巨大贡献。在此,我们展示了针对所选波兰近海新 BalTec 地震剖面以及传统 PGI97 区域地震数据的最佳地震数据处理工作流程。由于在浅水环境中采集,处理策略侧重于通过级联应用现代多重消除方法来抑制多重反射和导波。我们说明了新数据和重新处理后的数据在重点对科沙林断层区域进行地震解释方面的潜力。根据现有数据,科沙林断层是控制中生代沉降和波兰近海中坡海槽东部晚白垩世-古新世反转的主要结构。在远离波兰海岸的北部,反转的特征从薄皮变为厚皮。科沙林断层重新激活了劳鲁西亚边缘泥盆纪大陆裂解时期遗留下来的古老构造纹理。该断层与喀里多尼亚变形前线斜交,喀里多尼亚变形前线自志留纪-泥盆纪过渡时期形成以来一直处于静止状态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Post-Caledonian tectonic evolution of the Precambrian and Paleozoic platform boundary zone offshore Poland based on the new and vintage multi-channel reflection seismic data
Abstract. The structure of the post-Caledonian sedimentary cover in the transition from the Precambrian to the Paleozoic platforms in the Polish sector of the Baltic Sea is a matter of ongoing debate due to the sparsity of quality seismic data and insufficient well data. The new high-resolution BalTec seismic data acquired in 2016 contributed greatly to deciphering the regional geology of the area. Here we show an optimal seismic data-processing workflow for the selected new BalTec seismic profiles offshore Poland, as well as legacy PGI97 regional seismic data. Due to the acquisition in a shallow-water environment, the processing strategy focused on suppressing multiple reflections and guided waves through a cascaded application of modern multiple elimination approaches. We illustrate the potential of the new and re-processed data for focusing seismic interpretation on the area of the Koszalin Fault. In light of the available data, the Koszalin Fault was the main structure controlling Mesozoic subsidence and Late Cretaceous–Paleocene inversion of the eastern portion of the Mid-Polish Trough offshore Poland. The inversion changed its character from thin- to thick-skinned towards the north, away from the Polish coast. The Koszalin Fault reactivated older structural grain inherited from the time of Devonian continental rifting at the margin of Laurussia. The fault runs obliquely to the Caledonian Deformation Front, the feature that remained inactive since its formation at the Silurian–Devonian transition.
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来源期刊
Solid Earth
Solid Earth GEOCHEMISTRY & GEOPHYSICS-
CiteScore
6.90
自引率
8.80%
发文量
78
审稿时长
4.5 months
期刊介绍: Solid Earth (SE) is a not-for-profit journal that publishes multidisciplinary research on the composition, structure, dynamics of the Earth from the surface to the deep interior at all spatial and temporal scales. The journal invites contributions encompassing observational, experimental, and theoretical investigations in the form of short communications, research articles, method articles, review articles, and discussion and commentaries on all aspects of the solid Earth (for details see manuscript types). Being interdisciplinary in scope, SE covers the following disciplines: geochemistry, mineralogy, petrology, volcanology; geodesy and gravity; geodynamics: numerical and analogue modeling of geoprocesses; geoelectrics and electromagnetics; geomagnetism; geomorphology, morphotectonics, and paleoseismology; rock physics; seismics and seismology; critical zone science (Earth''s permeable near-surface layer); stratigraphy, sedimentology, and palaeontology; rock deformation, structural geology, and tectonics.
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