کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4694078 1636886 2009 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelled palaeo-temperature on Vøring, offshore mid-Norway — The effect of the Lower Crustal Body
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Modelled palaeo-temperature on Vøring, offshore mid-Norway — The effect of the Lower Crustal Body
چکیده انگلیسی

The Vøring area, offshore mid-Norway has a complex geological history, has experienced several extensional phases and was significantly influenced by the break-up of the North Atlantic. We have modelled a cross-section over the Vøring Basin aiming to 1) reconstruct the basin evolution in a realistic way, and 2) to investigate the heat flow and temperature history in the basin.For the modelling we used the following tectonic events: the opening of the basin during the Permo-Triassic, an event during the Middle to Late Cretaceous and an event in the Late Cretaceous/Paleocene. The theoretical effects of the lithospheric stretching are depending on the palaeo-water depths of the area. We present a prediction of the palaeo-water depth, and a sensitivity analysis of the influence of the palaeo-water depth on the estimated beta-factors in the area.A lower crustal high-velocity body found in the area is often interpreted as magmatic underplating related to the break-up of the Norwegian Sea. We show the temperature history calculated by models that were run with and without assumption of underplating by a magmatic body emplaced during the Early Tertiary. The observed vitrinite reflectance in the Vøring area is best explained by numerical calculations of the vitrinite reflectance without a magmatic underplating. Our conclusion is that the Lower Crustal Body is not related to magmatic underplating or to significant sill intrusions. The body may consist of older mafic rocks, or a mixture of old continental crust and mafic intrusions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 474, Issues 3–4, 10 September 2009, Pages 544–558
نویسندگان
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