کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4694165 1636896 2009 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crustal structure and evolution of the outer Møre Margin, NE Atlantic
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Crustal structure and evolution of the outer Møre Margin, NE Atlantic
چکیده انگلیسی

Five regional Ocean Bottom Seismic profiles from the northwestern part of the Møre Margin, NE Atlantic, have been modeled with regard to crustal structure, and the interpretations have been supported by the use of multi-channel seismic and potential field data. The chi-squared values (uncertainty) for the studied profiles are generally in the range 1–3, and the uncertainty in the Moho depth is estimated to ± 1 km. The Continent–Ocean-Transition is found to be relatively sharp (10–40 km wide) expressing a change in physical properties corresponding to felsic continental crust along the landward part of the marginal high (Vp = 6.2–6.5 km/s), and thick, mafic oceanic crust further northwestwards. The Early Eocene breakup was associated with excessive magmatism, and the models document direct continuity between this magmatism and a lower crustal high-velocity layer in the Møre Basin (Vp = 7.1–7.3 km/s), suggesting a genetic link. The Jan Mayen Lineament is observed across the entire study area as northeastward termination of the lower crustal body, as well as structuring in the top of the crystalline basement and the Moho. We present a speculative model involving lower crustal bodies of eclogites (Vp > 8 km/s) inferred in the easternmost part of the Møre Basin linking the Jan Mayen Lineament to the post-Caledonian Nordfjord-Sogn Detachment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 468, Issues 1–4, 1 April 2009, Pages 224–243
نویسندگان
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