NDLI: Structuration Extensive Et Transtensive Au Devono-dinantien Du Bassin De Tim Mersoï (bordure Occidentale De L'aïr, Nord Niger).

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Structuration Extensive Et Transtensive Au Devono-dinantien Du Bassin De Tim Mersoï (bordure Occidentale De L'aïr, Nord Niger).

Content Provider	Semantic Scholar
Author	Konaté, Moussa Denis, Michaël Yahaya, Moussa Guiraud, Michel
Copyright Year	2007
Abstract	L'etude tectono-sedimentaire preliminaire du bassin de Tim Mersoi confirme le controle exerce par les accidents majeurs N-S d'In Azaoua-Arlit, N30°E de Madaouela et N70°E de Tin Adrar sur la geometrie du remplissage sedimentaire. Pour la periode devono-dinantienne, deux phases majeures de structuration ont ete mises en evidence : une phase extensive, multi-episode (du Devonien au Viseen superieur) et une phase transtensive debutant au Viseen terminal. Ces deux phases tectoniques majeures sont responsables de l'ouverture polyphasee du bassin. Pendant la phase extensive, la direction d'allongement qui etait globalement N90°E au Devonien, devient successivement N70°E puis N150°E au Viseen superieur. Au cours de cette phase, les accidents majeurs precites ont ete affectes, a des degres divers, par des mouvements normaux. Au Tournaisien-Viseen inferieur, la succession d'episodes de glaciation et de deglaciation a localement perturbe, le regime des contraintes. La phase transtensive du Viseen Terminal, caracterisee par des directions de compression N10° a N30°E et d'extension N100° a N120°E, est essentiellement controlee par la reactivation decrochante senestre du Faisceau de Tin Adrar et le jeu normal du systeme de faille de Madaouela. Cette tectonique transtensive synsedimentaire, controle etroitement la sedimentation de la Formation du Guezouman (facies et geometrie des depots).
Starting Page	1
Ending Page	32
Page Count	32
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://hal.archives-ouvertes.fr/hal-00385686/document
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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