3D reconstruction of syn-tectonic strata in a salt-related orogen: learnings from the Llert syncline (South-central Pyrenees)

IF 1.3 4区 地球科学 Q2 GEOLOGY Geologica Acta Pub Date : 2020-12-11 DOI:10.1344/geologicaacta2020.18.20
A. Ramos, B. Lopez-Mir, Elisabeth P. Wilson, P. Granado, J. Muñoz
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引用次数: 7

Abstract

The Llert syncline is located in the South-central Pyrenees, between the eastern termination of the EW-trending Cotiella Basin and the north-western limb of the NS-trending Turbón-Serrado fold system. The Cotiella Basin is an inverted upper Coniacian-lower Santonian salt-floored post-rift extensional basin developed along the northern Iberian rift system. The Turbón-Serrado fold system consists of upper Santonian – Maastrichtian contractional salt-cored anticlines developed along an inverted transfer zone of the Pyrenean rift system. Based on field research, this paper presents a 3D reconstruction of the Llert syncline in order to further constrain the transition between these oblique salt-related structures. Our results suggest that the evolution of the Llert syncline was mainly controlled by tectonic shortening related to the tectonic inversion of the Cotiella Basin synchronously to the growth of the Turbón-Serrado detachment anticline, and by the pre-compressional structural framework of the Pyrenean rift system. Our contribution provides new insight into the geometric and kinematic relationships of structures developed during the inversion of passive margins involving salt.
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盐相关造山带同构造地层的三维重建:从Llert向斜(比利牛斯中南部)学习
勒勒特向斜位于比利牛斯山脉中南部,位于东向Cotiella盆地的东部末端和北向Turbón-Serrado褶皱体系的西北分支之间。Cotiella盆地是沿伊比利亚北部裂谷系发育的上coniian -下sanantonian盐底逆裂谷后伸展盆地。Turbón-Serrado褶皱系由沿比利牛斯裂谷系反转转移带发育的上圣东—马斯特里赫特收缩盐核背斜组成。本文在野外研究的基础上,对勒勒特向斜进行了三维重建,以进一步约束这些斜向盐相关构造之间的过渡。研究结果表明,勒勒特向斜的演化主要受与Turbón-Serrado滑脱背斜生长同步的Cotiella盆地构造反转相关的构造缩短和比利牛斯裂谷系的挤压前构造格架控制。我们的贡献为涉及盐的被动边缘反演期间发展的结构的几何和运动学关系提供了新的见解。
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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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