The formation of an orocline by multiphase ... - ResearchGate
The formation of an orocline by multiphase ... - ResearchGate
The formation of an orocline by multiphase ... - ResearchGate
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748A.B. Weil et al. / Journal <strong>of</strong> Structural Geology 22 (2000) 735±756pattern. Both limbs also exhibit a consistent relationshipbetween ch<strong>an</strong>ges in strike <strong>an</strong>d magnetic declination(Fig. 4). However, the inclinations are varied, <strong>an</strong>dch<strong>an</strong>ge from negative to positive <strong>an</strong>d back to negativealong the length <strong>of</strong> the entire structure (Fig. 13 <strong>an</strong>dTable 1). Such <strong>an</strong> undulating inclination patternsuggests a combination <strong>of</strong> southerly <strong>an</strong>d northerly tiltsthroughout the structure as a result <strong>of</strong> post-magnetizationfolding. This pattern is most easily related to a set<strong>of</strong> variably plunging east±west-trending F 3 fold-axesFig. 10. Local inclination-only fold tests for La Vega de los Viejos Syncline, plotting kappa (squares) <strong>an</strong>d inclination (diamonds) against percentunfolding. (a) Fold test <strong>of</strong> sites PL51, PL52, PL53, PL54, PL55, PL56, PL57, SL61, SL62, SL64, SL65, SL66, SL67, SL68, SL69, SL70, <strong>an</strong>dSL71 showing a C magnetization acquired pre-F 2 folding. (b) Fold test <strong>of</strong> sites PL49 <strong>an</strong>d PL50 that also shows a pre-F 2 C magnetization. (c)Fold test for the low temperature component at two sites (SL64 <strong>an</strong>d SL69) in the northern section <strong>of</strong> the Viejos domain. <strong>The</strong> maximum kappaat 0% unfolding is consistent with a B component magnetization acquisition that postdates F 2 de<strong>formation</strong>.