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首页> 外文期刊>Journal of geodynamics >Deformation history during chain building deduced by outcrop structural analysis: The case of the Sicilian fold-and-thrust belt (Central Mediterranean)
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Deformation history during chain building deduced by outcrop structural analysis: The case of the Sicilian fold-and-thrust belt (Central Mediterranean)

机译：露头结构分析推导的链条建设过程中的变形历史：以西西里褶皱冲断带为例（地中海中部）

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摘要

The Sicilian fold-and-thrust belt is located in the central Mediterranean area, and it represents the southeastern arcuate segment of the Apennine-Maghrebide orogen. The tectonic evolution of the Sicilian belt is documented after outcrop analysis of small-scale structural features carried out throughout the region. Results are consistent with the following four main deformation stages having affected the study area, from the oldest to the youngest: (i) multilayer weakening; (ii) folding-and-thrusting, (iii) extension, and (iv) renewed thrusting. The first deformation stage included three different substages (layer-parallel shortening, bed-parallel simple shear and fold nucleation), the second one by both thrusting and fold amplification and tightening. The third deformation stage involved re-activation of the pre-existing mechanical discontinuities and formation of low-to-high angle normal faults. Out-of-sequence thrusting postdated the aforementioned extensional stage, and formed the latest orogenic deformation stage that affected the Sicilian belt. (C) 2015 Elsevier Ltd. All rights reserved.
机译：西西里的褶皱冲断带位于地中海中部地区，它代表了亚平宁-马格里贝克造山带的东南弓形部分。在对整个区域进行的小规模结构特征的露头分析之后，记录了西西里带的构造演化。结果与影响研究区域的以下四个主要变形阶段一致，从最老到最年轻：（i）多层薄弱； （ii）折叠和推力；（iii）伸展；（iv）重新推力。第一个变形阶段包括三个不同的子阶段（层平行缩短，床平行简单剪切和褶皱成核），第二个变形阶段通过推力和褶皱放大和收紧。第三变形阶段涉及重新激活先前存在的机械不连续性，并形成低到大角度的法向断层。无序推力早于上述伸展阶段，形成了影响西西里带的最新造山变形阶段。 （C）2015 Elsevier Ltd.保留所有权利。

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