探地雷达探测发现Krško盆地Brežice萨瓦河阶地可能存在构造倾斜

Q3 Earth and Planetary Sciences Geologija Pub Date : 2020-12-23 DOI:10.5474/geologija.2021.001
M. Zajc, M. Poljak, A. Gosar
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引用次数: 0

摘要

据推测,Brežice Sava河阶地(BSRT)在Brečice镇附近受到构造扰动,并向北倾斜。为了在定量意义上证实这种构造引起的倾斜,应用了低频探地雷达(GPR)。BSRT共记录了八个GPR剖面,提供了阶地下边界的信息,该阶地由松散到胶结不良的第四纪砾石组成,而第三纪基底由胶结不良的碳质淤泥(泥灰岩)组成。该研究的前提是假设该岩性边界可以通过GPR方法检测到。除了BSRT的上表面向北倾斜0.18°外,GPR剖面还显示,阶地的上表面与其与基底的下边界之间的倾斜度相差0.04°,我们将其归因于沉积倾斜。根据这些信息,BSRT下边界的累积构造诱发倾角被定义为0.22
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GPR survey to reveal a possible tectonic tilt of the Brežice Sava River Terrace in the Krško Basin
It has been supposed that the Brežice Sava River Terrace (BSRT) is tectonically disturbed near the town of Brežice and tilted to the north. To confirm this tectonically induced tilt in a quantitative sense, low-frequency Ground Penetration Radar (GPR) was applied. A total of eight GPR profiles were recorded across the BSRT providing information of the lower boundary of the terrace, which consists of loose to poorly cemented Quaternary gravel, while its Tertiary basement consists of poorly cemented carbonaceous silt (marl). The premise of the study was the assumption that this lithological boundary could be detected by the GPR method. In addition to the upper surface of the BSRT being tilted to the north by 0.18°, GPR profiles also showed a 0.04° difference in the tilt between the upper surface of the terrace and its lower boundary with the basement, which we assigned to the sin-sedimentary tilt. Upon this information, a cumulative tectonically induced dip of the BSRT lower boundary was defined at 0.22
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来源期刊
Geologija
Geologija Earth and Planetary Sciences-Geophysics
CiteScore
1.00
自引率
0.00%
发文量
10
审稿时长
10 weeks
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