U. Ring, THE KINEMATICS OF THE LATE ALPINE MURETTO FAULT AND ITS RELATION TO DEXTRAL TRANSPRESSION ACROSS THE PERIADRIATIC LINE, Eclogae Geologicae Helvetiae, 87(3), 1994, pp. 811-831
The late Alpine (post-Bergell) N30-degrees-W-striking Muretto fault is
a dextral oblique-normal fault which is kinematically compatible with
some minor faults immediately north and east of the Bergell pluton. T
heir kinematics are due to oblique eastsoutheast-directed principal ex
tension and also oblique northeasterly-directed contraction. The kinem
atic evolution of the adjacent N50-degrees-E-striking sinistral obliqu
e-reverse Engadine line is similar. The kinematics of indentation of t
he Adriatic plate and associated dextral transpression across the E-W
trending Periadriatic line is different, with northeast-directed exten
sion and shortening oriented NW-SE. It is suggested that the intrusion
and simultaneous to subsequent rapid uplift and dextral displacement
of the Bergell pluton, the intrusion of which is kinematically related
to movement at the Periadriatic line, created a local, near-field kin
ematic framework which controlled faulting at the Muretto and related
faults at its northeastern tip.