Quantitative structural analyses and numerical modelling of ...

J. KonopaÂsek et al. / Journal of Structural Geology 23 2001) 1373±1392 1381Fig. 5. a) S±C fabric in porphyritic orthogneiss of the Lower Crystalline nappe. This fabric originated during D2 and suggests top-to-the-west oriented senseof movement. b) Isoclinal F 2 fold in metagreywackes of the parautochthonous unit. c) Vertical S 2 foliation in the southern limb of the KlõÂnovec antiform. Thisvertical fabric resulted fromrefolding of originally ¯at S 2 foliation during D3. d) F 3 fold with steep axial plane in the autochthonous plagioclase schists southof the KlõÂnovec antiform. e) Conjugate system of D3 kink bands affecting the S 2 foliation in the hinge zone of the MeÏdeÏnec antiform. f) Late F 4 folds withsubhorizontal axial planes in amphibolite of the southern limb of the KlõÂnovec antiform.orthogneisses is systematically plunging gently to the WFig. 4), whereas in the eclogites, the omphacite L 1 lineationis gently plunging to the W±WSW in the central part of theKlõÂnovec antiformand steeply to the SW in the hinge zone.Numerous D3 fold structures up to several metres in sizewith E±W trending subhorizontal hinge zones and steep tointermediate, mostly northward dipping axial planes occurin the parautochthonous plagioclase schists south of theKlõÂnovec antiformFigs. 4 and 5d).The D3 deformation is most intense in the parautochthonousplagioclase schists in the area between the northernlimb of the KlõÂnovec antiformand the southern limb of57