Âge ⁴⁰K/⁴⁰Ar, Carbonifère inférieur, du magmatisme basique filonien du synclinal paléozoïque de Tin Serririne, Sud-Est du Hoggar (Algérie)

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• 作者：Hamou Djellit ; Hervé ; Bellon ; Aziouz Ouabadi ; Mohamed E.M. Derder ; Bernard Henry ; Boualem Bayou ; Allaoua Khaldi ; Kamal Baziz and Mounir K. Merahi
• 关键词：Magmatism ; KAr isotopic dating ; Carboniferous ; Hoggar
• 刊名：Comptes Rendus Geoscience
• 出版年：2006
• 期刊代码：87_16310713
• 类别：ear
• 出版时间：July 2006
• 卷：338
• 期：9
• 页码：624-631
• 文件大小：355 K

摘要

Palaeozoic formations of the Tassilis Oua-n-Ahaggar (southeastern Hoggar) include magmatic rocks in the Tin Serririne syncline. Slight contact metamorphism of the overlying bed and studies of anisotropy of magnetic susceptibility of these rocks show that the latter correspond to sills and NW–SE or north–south dykes. ⁴⁰K/⁴⁰Ar dating of separated feldspars and whole rock for one sample and of whole rock for two other samples give a mean age of (at the 2-σ level), thus corresponding to a Lower Carboniferous (Tournaisian) age. Taking into account both the age of this magmatism and the stratigraphic and structural data for this region suggests that dolerites were emplaced within distensive zones that are related to the reactivation of Panafrican faults. To cite this article: H. Djellit et al., C. R. Geoscience 338 (2006).