Short-lived kinematics in the Southern Andes, Chile-Argentina.
Records of short-lived changes in
local stress kinematics induced by large magnitude earthquakes in the
volcanic arc are short-lived and difficult to find in the geological
records. However, earthquake-volcano interactions are recorded since
the 19th century. Darwin first noted a link between
subduction zone earthquakes and arc volcanism in his description of
erupting Chilean volcanoes following the 1835 M8.5 Conception, Chile
earthquake. This study aims at analysing faults and misoriented dikes
in the Southern-Central Andes at both large- and small-scale.
Particular emphasis will be given to tectonic features relevant for
determining paleo-stresses, such as dike orientations, fault slip
data, and extension of joints/fractures. An important part of the
fieldwork will be to quantitatively evaluate the contribution of
tectonics with regards to dike intrusions and mechanical deformation.
This study is suited for a structural geologist interested in active
tectonics, volcanoes, and mega-thrust earthquakes. This study
involves a field campaign and it is therefore aimed at field-oriented