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首页> 外文期刊>Global and planetary change >High resolution architecture of neotectonic fault zones and post-8-Ma deformations in western Hungary: Observations and neotectonic characteristics of the fault zone at the Eastern Lake Balaton
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High resolution architecture of neotectonic fault zones and post-8-Ma deformations in western Hungary: Observations and neotectonic characteristics of the fault zone at the Eastern Lake Balaton

机译：匈牙利西部射精断层区的高分辨率建筑和8米变形：东部巴拉顿东湖断裂带的观测和霓虹灯特性

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摘要

Lake Balaton (Hungary), the largest lake in Central Europe, formed by the interplay of tectonic and external forces. Its shallow water and young soft sediments together allow to carry out ultra-high resolution reflection seismic surveys to investigate shallow tectonic structures and near surface stratigraphy at depth of ca. 0 & ndash;30 m. To document neotectonics of the eastern lake basin and its onshore surroundings to the East, we have integrated new ultra-high-resolution seismic-reflection data with deeper penetrating multichannel lake and land seismic profiles, regional geological, geophysical and seismicity data, and geomorphological observations. Combined use of these different data sets provided an opportunity to understand better, how these different types and scales of structural features are linked. In our study area, late middle to late Miocene formations compose a deepening than shallowing sedimentary cycle from terrestrial clastic through offshore marl and deltaic sequence filling up the basin between ca. 8.6 to 7.5 Ma. The deltaic sequence is unconformably overlain by erosional remnants of late Pleistocene fluvial deposits and a mantle of latest Pleistocene to Holocene lake mud. Post-early Miocene deformation history involved two phases; a latest middle to early late Miocene transtension and a dominantly strike-slip regime with locally transpressional or transtensional character. The latter neotectonic phase reactivated the earlier faults and resulted in the propagation of 4 major fault zones across the complete late Miocene sequence. The resulting young faults show segmented geometry, stepovers, and connecting splays. The deformation also induced the modest but penetrative folding of the highest preserved Miocene deltaic sequence. The change in deformation style could happen during the late-stage of delta formation, at ca. 8 Ma although a slightly younger timing is not excluded. Faults imaged offshore apparently do not offset the Holocene lacustrine mud by discrete fractures, but the improved distribution map of recent seismicity and morphotectonic indices along their onshore continuations suggests that several segments of the fault pattern are still active, and might be capable of generating earthquakes. Integration of these different data provided an opportunity to understand better, how these different types and scales of structural features are linked and evolved one after another.
机译：巴拉顿湖（匈牙利）是中欧最大的湖泊，由构造和外力的相互作用形成。其浅水和年轻软沉积物在一起允许进行超高分辨率反射地震调查，以调查浅构造结构和近的CA深度靠近表面层面。 0＆ndash; 30米。为了向东部的东部湖泊盆地和陆上环境的新推销学，我们已经综合了新的超高分辨率地震 - 反射数据，深入穿透多通道湖和陆地地震曲线，区域地质，地球物理和地震性数据以及地貌观测。组合使用这些不同的数据集提供了理解更好的机会，这些不同类型和结构特征的尺度是如何链接的。在我们的研究领域，中间到后期内部地层的深化型从陆地碎片通过近海Marl和Deltaic序列填充了CA之间的盆地的沉积周期。 8.6至7.5 mA。 Deltaic序列是通过晚熟河流储存的侵蚀残余的侵蚀性覆盖，以及最新的全新世湖泥土的披风。早期后的内肾变形历史涉及两阶段;最新的中间到早期后期后期静音和具有局部跨压或横断面的特征的主导罢工制度。后者的新发现相重新激活了较早的故障，导致跨越完整的晚期内序序列的4个主要断层区域的传播。由此产生的幼小故障显示分段几何，梯度和连接的展会。变形也诱导了最适度但渗透折叠的最高保存的中生序列序列。在加利福尼亚州的三角洲地层后期发生变形风格的变化可能发生。 8 mA虽然没有排除稍微较小的时机。缺陷近海成像显然不会通过离散骨折抵消全新世湖泥浆，但最近的地震性和连续式依据的改进的分布图沿着他们的陆上持续延续表明，故障模式的几个部分仍然有效，并且可能能够产生地震。这些不同数据的集成提供了理解更好的机会，这些不同类型和结构特征的尺度是如何链接和演变的。

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  • 来源
    《Global and planetary change》 |2021年第8期|103540.1-103540.20|共20页
  • 作者

    Visnovitz Ferenc; Jakab Benjamin; Czecze Barbara; Hamori Zoltan; Szekely Balazs; Fodor Laszlo; Horvath Ferenc;

  • 作者单位

    Eotvos Lorand Univ Dept Geophys & Space Sci Pazmany P Setany 1-C H-1117 Budapest Hungary;

    Eotvos Lorand Univ Dept Geophys & Space Sci Pazmany P Setany 1-C H-1117 Budapest Hungary|PM PROjEN 1100 Daresbury Pk Warrington WA4 4HS Cheshire England;

    Eotvos Lorand Univ Dept Geophys & Space Sci Pazmany P Setany 1-C H-1117 Budapest Hungary|Kovesligethy Rado Seismol Observ Geodet & Geophys Inst Res Ctr Astron & Earth Sci Meredek U 18 H-1112 Budapest Hungary;

    GEOMEGA Geol Explorat & Environm Serv Ltd Zsil U 1 H-1093 Budapest Hungary;

    Eotvos Lorand Univ Dept Geophys & Space Sci Pazmany P Setany 1-C H-1117 Budapest Hungary;

    Eotvos Lorand Univ Dept Geol Pazmany P Setany 1-C H-1117 Budapest Hungary|Eotvos Lorand Univ ELKH ELTE Geol Geophys & Space Sci Res Grp Budapest Hungary;

    Eotvos Lorand Univ Dept Geophys & Space Sci Pazmany P Setany 1-C H-1117 Budapest Hungary|GEOMEGA Geol Explorat & Environm Serv Ltd Zsil U 1 H-1093 Budapest Hungary;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Shear zone; Ultra-high resolution; Fault pattern; Fault segmentation; Offshore reflection seismic; Lake Balaton; Neotectonics;

    机译：剪切区;超高分辨率;故障模式;断层分割;海上反射地震;巴拉顿湖;新型歌词;

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