The Variscan belt of Northern France–Southern Belgium: geodynamic implications of new palaeomagnetic data
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- 作者：Má ; rton ; Em&odblac ; Mansy ; Jean-Louis ; Averbuch ; Olivier ; Csontos ; Lá ; szló
- 关键词：geodynamic implication ; palaeomagnetism ; Palaeozoic ; Variscan belt
- 刊名：Tectonophysics
- 出版年：2000
- 出版时间：September 15, 2000
- 年：2000
- 卷：324
- 期：1-2
- 页码：57-80
- 全文大小：1.23 M
文摘
Palaeomagnetic investigations were carried out in Devonian–early Carboniferous rocks of the Variscan foreland chain of Northern France–Southern Belgium in order to reveal the origin of its arcuate shape. The Brabant Parautochthon was sampled in the Boulonnais (near Calais) and near Tournai, while the Ardenne Allochthon was sampled near Maubeuge and in the Givet area. All the sampled localities yielded characteristic remanent magnetization as a result of stepwise demagnetization and component analysis. Fold or tilt tests were possible for three localities, with negative results indicating pervasive remagnetization. The tectonic position was sub-horizontal at two localities, while the tilt was monoclinal for the rest. Therefore, the acquisition time of the magnetic signals was estimated by comparing the palaeolatitude computed from each magnetic component to the palaeolatitudes of Variscan Europe calculated after .