Change of deformation mechanisms during low temperature flow of rocks — observation from micron to nanometer scales
Liu, Junlai
Cao, Shuyun
Universitätsverlag Göttingen
Sammelband- / Konferenzbeitrag
Verlagsversion
Deutsch
Liu, Junlai; Cao, Shuyun, 2006: Change of deformation mechanisms during low temperature flow of rocks — observation from micron to nanometer scales. In: Philipp, S., Leiss, B, Vollbrecht, A., Tanner, D. & Gudmundsson, A. (eds.): 11. Symposium "Tektonik, Struktur- und Kristallingeologie" - S. 135-136, Univ.-Verl. Göttingen, 2006, , DOI: 10.23689/fidgeo-1921.
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Recent studies on nano-materials in
materials science revealed that nanomaterials
may have fantastic features
due mainly to size-effect of the materials.
For example, nano ceramics may
have very high ductility at room temperatures
and pressures, even though normal
ceramics is easily deformed by brittle
fracturing.
What and how much do we know about
the nature of nano or nano to micron
scale geological materials? What factors
contribute to their occurrence? How do
they flow at geological conditions and
how do they affect the rheology of rocks?
Upper crustal deformation is characterized
by low temperature flow of
rocks under unsteady state, which results
in progressive grainsize reduction
and leads to the occurrence of micron
to nano meter scale materials in
fault zones. The examples of naturallydeformed
upper crustal rocks presented
in the paper help to unravel the importance
of nano to micron scale rock materials
during the low temperature flow
of rocks.