Fracturing and vein formation in the middle crust - a record of co-seismic loading and post-seismic stress relaxation
Nüchter, Jens-Alexander
Stöckhert, Bernhard
Universitätsverlag Göttingen
Article in Anthology
Verlagsversion
Deutsch
Nüchter, Jens-Alexander; Stöckhert, Bernhard, 2006: Fracturing and vein formation in the middle crust - a record of co-seismic loading and post-seismic stress relaxation. In: Philipp, S.; Leiss, B; Vollbrecht, A.; Tanner, D.; Gudmundsson, A. (eds.): 11. Symposium "Tektonik, Struktur- und Kristallingeologie"; 2006, Univ.-Verl. Göttingen, p. 155 - 156., , DOI: 10.23689/fidgeo-1852.
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Metamorphic rocks approaching the
crustal scale brittle-ductile transition
(BDT) during exhumation are expected
to become increasingly affected by short
term stress fluctuations related to seismic
activity in the overlying seismogenic
layer (schizosphere), while still residing
in a long-term viscous environment
(plastosphere). The structural and microstructural
record of quartz veins in
low grade – high pressure metamorphic
rocks from southern Evia, Greece, yields
insight into the processes and conditions
just beneath the long-term BDT at temperatures
of about 300 to 350°C, with
switches between brittle failure and viscous
flow as a function of imposed stress
or strain rate...