کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4694659 1636919 2008 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Earthquakes and strength in the laminated lower crust —Can they be explained by the “corset model”?
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Earthquakes and strength in the laminated lower crust —Can they be explained by the “corset model”?
چکیده انگلیسی

We present a model that may explain deep crustal earthquakes observed, in particular, in several areas of highly reflective (laminated) lower continental crust. We combine observations from earthquake seismology, crustal reflection seismics and tectonic-rheological concepts. The study concentrates on parts of the northern Alpine foreland where many earthquakes occur inside the laminated lower crust, which is generally considered to be warm and weak. Thin mafic/ultramafic, sill-like intrusions and invisible dykes are assumed to form a corset-like network with high strength. This model can explain the observed strong and multiple reflections and the occurrence of rupture inside a stable structure within a weak lower crust. Tectonic stress transfer (from the Alpine collision zone or/and the Upper Rhine Graben) and its release may follow classical friction concepts. In addition, the heterogeneity of the laminated lower crust may also favour various viscous instabilities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 448, Issues 1–4, 25 February 2008, Pages 49–59
نویسندگان
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