کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6433440 1636719 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
First-order estimate of the Canary Islands plate-scale stress field: Implications for volcanic hazard assessment
ترجمه فارسی عنوان
برآورد مرتبه اول مقیاس تنش در جزایر قناری: اثرات ارزیابی خطر آتشفشانی
کلمات کلیدی
جزایر قناری، زمینه تنش زمین تکتونیکی در سطح مقطع، فعالیت آتشفشانی مدل سازی عددی، ارزیابی خطر آتشفشانها،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- Stress field is a key parameter controlling the distribution of volcanism.
- We provide a first-order plate-scale stress field in the volcanic Canary Islands.
- We also develop a regional model with archipelago-scale structural discontinuities.
- Methodology useful to define potential tectonic controls of future volcanism.
- Plate/regional stresses can be essential information for volcanic hazard assessment.

In volcanic areas, the existing stress field is a key parameter controlling magma generation, location and geometry of the magmatic plumbing systems and the distribution of the resulting volcanism at surface. Therefore, knowing the stress configuration in the lithosphere at any scale (i.e. local, regional and plate-scale) is fundamental to understand the distribution of volcanism and, subsequently, to interpret volcanic unrest and potential tectonic controls of future eruptions. The objective of the present work is to provide a first-order estimate of the plate-scale tectonic stresses acting on the Canary Islands, one of the largest active intraplate volcanic regions of the World. In order to obtain the orientation of the minimum and maximum horizontal compressive stresses, we perform a series of 2D finite element models of plate scale kinematics assuming plane stress approximation. Results obtained are used to develop a regional model, which takes into account recognized archipelago-scale structural discontinuities. Maximum horizontal compressive stress directions obtained are compared with available stress, geological and geodynamic data. The methodology used may be easily applied to other active volcanic regions, where a first order approach of their plate/regional stresses can be essential information to be used as input data for volcanic hazard assessment models.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 679, 4 June 2016, Pages 125-139
نویسندگان
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