000004158 001__ 4158
000004158 005__ 20190618164218.0
000004158 0247_ $$2DOI$$a10.1016/B978-0-12-814048-2.00009-0
000004158 037__ $$aBKSECT-2019-0011
000004158 100__ $$aVan Noten, Koen
000004158 245__ $$aChapter 9 - Unfolding Veined Fold Limbs to Deduce a Basin's Prefolding Stress State
000004158 260__ $$c2019
000004158 300__ $$a302
000004158 520__ $$aTectonic structures that developed prior to folding, such as pre- and early-kinematic veins, hold valuable information on the stress state of the paleobasin in which these early structures formed. To derive the parental orientation of these prefolding brittle structures, folds need to “unfold.” A fold restoration methodology is presented in which fold limbs, and the structures they contain, are rotated back to their depositional horizontal position by removing the tilt of the fold hinge line and the dip of individual fold limbs. The method is applied on quartz veins emplaced in folded Lower Devonian sandstones from the High-Ardenne slate belt (Belgium, Germany) and allowed deducing NW-SE opening when the Ardenne-Eifel Basin was at maximum burial depth (early Carboniferous). This exercise can be used in structural geology classes to teach how to rotate data using stereonet techniques, thereby encouraging students in applying an unfolding strategy to derive information from prefolding structures.
000004158 594__ $$aNO NO
000004158 6531_ $$aRotation
000004158 6531_ $$aFolds
000004158 6531_ $$aReconstruction
000004158 6531_ $$aExtension
000004158 6531_ $$aPaleostress
000004158 6531_ $$aVariscan
000004158 700__ $$aSintubin, Manuel
000004158 773__ $$bBilli, A., Fagereng, A.$$c105-116$$tDevelopments in Structural Geology and Tectonics, Volume 5
000004158 85642 $$ahttps://www.sciencedirect.com/science/article/pii/B9780128140482000090
000004158 8560_ $$fkoen.vannoten@observatoire.be
000004158 980__ $$aBOOKSECT