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首页> 外文期刊>Acta Geologica Slovaca >The Hurbanovo–Di?sjen? Fault: A crustal-scale weakness zone at the boundary between the Central Western Carpathians and Northern Pannonian Domain
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The Hurbanovo–Di?sjen? Fault: A crustal-scale weakness zone at the boundary between the Central Western Carpathians and Northern Pannonian Domain

机译:Hurbanovo–Di?sjen?断层:中西部喀尔巴阡山脉与北潘诺尼亚山脉之间边界的地壳尺度弱化带

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The boundary between the Central Western Carpathians and the Northern Pannonian Domain – two crustal fragments with a different geodynamic provenance is represented by the Hurbanovo–Di?sjen? Fault. The fault itself is located in the northern edge of the Transdanubian Unit and is covered by the relatively thick Neogene to Quaternary fill of the Danube Basin. The nature of this tectonic boundary is explained very contradictory because it is known only from several boreholes drilled in the 1950–70s. Moreover, interpretation of the seismic profiles is missing. The description of aforementioned boreholes often displays an old-fashioned biostratigraphy and outdated tectonic explanation of the Hurbanovo–Di?sjen? Fault activity. Re-evaluation of the deep borehole cores penetrating the fill of several different Neogene and Palaeogene basins located above or near the Hurbanovo–Di?sjen? Fault supported by structural analysis allowed a new interpretation of the Cenozoic activity along this fault zone: (1) during the Oligocene collision of the Eastern Alpine–Western Carpathian orogenic system with the European Platform, latter replaced by the Early Miocene formation of the ALCAPA microplate and its successive tectonic escape eastward required a dextral strike-slip movement along the fau (2) a sinistral strike-slip movement along the fault is documented during the Middle Miocene evolution of the Danube and the Novohrad–Nógrad basins; and (3) a tectonic extinction of this crustal weakness zone was confirmed for the Late Miocene, when the Lake Pannon was formed. The renewed activity of this tectonic boundary as a normal fault is expected as a result of the Central Western Carpathian tectonic inversion phase in the Early Pliocene.
机译:中西喀尔巴阡山脉和北潘诺尼山脉之间的边界-两个地壳来源不同的地壳碎片由Hurbanovo–Di?sjen?代表。故障。断层本身位于Transdanubian单元的北部边缘,被相对较厚的新近纪至多瑙河盆地的第四纪填充物所覆盖。解释这种构造边界的性质是非常矛盾的,因为只有从1950-70年代钻出的几个钻孔中才能知道。此外,缺少对地震剖面的解释。对上述钻孔的描述通常显示出老式的生物地层学和对Hurbanovo-Di?sjen?的过时的构造解释。故障活动。对深孔岩心的重新评估,渗透了位于Hurbanovo–Di?sjen?上方或附近的几个不同的新近纪盆地和古近纪盆地的填充物通过结构分析支持的断层对沿该断层带的新生代活动进行了新的解释:(1)在东部高山-西喀尔巴阡造山系统与欧洲平台的渐新世碰撞期间,后者被ALCAPA微板的中新世早期形成所取代其连续的构造逃逸向东需要沿断层右旋走滑运动。 (2)在多瑙河中新世演化和诺沃拉德一诺格拉德盆地中,沿断层发生了左旋走滑运动。 (3)在Pannon湖形成后,该地壳薄弱带的构造灭绝已证实为中新世晚期。由于上新世早期中西部喀尔巴阡山脉构造反转阶段,预计该构造边界将恢复为正常断层的活动。

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