Simplon fault zone in the western and central Alps : Mechanism of Neogene faulting and folding revisited
Simplon fault zone in the western and central Alps : Mechanism of Neogene faulting and folding revisited
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阿尔卑斯山西部和中部的辛普朗断裂带:重新审视新近纪断裂和褶皱的机制
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
S. Schmid
中科院分区：
文献类型：
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作者：
L. Keller;B. Fügenschuh;M. Hess;B. Schneider;S. Schmid
新近系Simplon断裂带通常被认为是斜向会聚过程中右行走滑运动的转换带，或被认为是导致阿尔卑斯山造山带平行伸展的核心复合型正断层。然而，有证据表明，Simplon断裂带缺乏向东南方向的延续。在新的构造和裂变径迹资料的基础上，我们提出了一个亚得里亚海弯曲压头的斜压入模型，该模型导致在南部形成弯曲的连续的背褶皱，不包括Simplon断裂带的南延。隆起与后褶皱作用有关，其次是角闪岩相岩石的剥蚀、辅助折返。在北部，凹陷导致了下盘和上盘的不同缩短。
The Neogene Simplon fault zone is commonly either considered as a transfer zone for dextral strike-slip movements during oblique convergence or as a core complex–type normal fault leading to orogen-parallel extension in the Alps. There is, however, evidence that the Simplon fault zone lacks a southeastward continuation. On the basis of new structural and fission-track data, we propose a model of oblique indentation of a bent Adriatic indenter leading to the formation of a curved continuous wedge of backfolds in the south, not including a southern continuation of the Simplon fault zone. Updoming related to backfolding, followed by erosion, assisted exhumation of amphibolite facies rocks. In the north, indentation led to differential shortening in the footwall and hanging wall.