The extent of penetrative Pyrenean deformation in the Ebro foreland Basin: Magnetic fabric data from the eastern sector

IF 1.3 4区 地球科学 Q2 GEOLOGY
J. Parés, D. Anastasio
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引用次数: 2

Abstract

We studied Cenozoic sedimentary rocks in the NE Ebro foreland Basin using the Anisotropy of Magnetic Susceptibility (AMS) as a proxy for grain preferred orientation. Our new data, in combination with existing results, reveal that penetrative strain by layer-parallel shortening extends well beyond the Pyrenean thrust-wedge front into the Ebro foreland Basin, challenging the concept of the location of “deformation front” in the Southern Pyrenees. Penetrative strain, as revealed by the magnetic fabrics, seems to reach larger distances into the Ebro foreland Basin where stiffer layers constitute the main detachment level, whereas to the East strain dissipates closer to the deformation front when the detachment is mostly due to salt deposits.
埃布罗前陆盆地比利牛斯山脉渗透变形的程度:来自东段的磁组构资料
利用磁导率各向异性(AMS)作为颗粒优选方向的代表,对东北埃bro前陆盆地新生代沉积岩进行了研究。我们的新数据,结合现有的结果,揭示了层平行缩短的渗透应变远远超出了比利牛斯山脉的逆冲楔锋面,进入了Ebro前陆盆地,挑战了“变形锋”位于比利牛斯山脉南部的概念。磁组构显示,渗透应变在Ebro前陆盆地内的距离较大,其中较硬的层构成了主要的拆离水平,而在东部,当拆离主要是由盐沉积引起时,应变在靠近变形前沿的地方消散。
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来源期刊
Geologica Acta
Geologica Acta 地学-地质学
CiteScore
2.50
自引率
6.70%
发文量
13
审稿时长
>12 weeks
期刊介绍: - Relevant conceptual developments in any area of the Earth Sciences. - Studies presenting regional synthesis. - Thematic issues or monographic volumes presenting the results from one or more research groups. - Short papers reflecting interesting results or works in progress. - Contributions and results from Research Projects, Workshops, Symposiums, Congresses and any relevant scientific activity related to Earth Sciences. - Geologica Acta aims to stimulate rapid diffusion of results and efficient exchange of ideas between the widespread communities of Earth Science researchers (with special emphasis on Latinamerica, the Caribbean, Europe, the Mediterranean
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