A laboratory simulation of rock breakdown due to freeze-thaw in a maritime antarctic environment
Results of freeze-thaw simulations on three large blocks of quartz-micaschist are presented. Identification of three types of water to ice phase change from temperature and ultrasonic measurements. It is suggested that the type of phase change
results from a particular combination of rock moisture content, solute concentration, freeze amplitude, and rate of fall of temperature. The temperature at which ice thawed inside the rock (-0.7 to 1.9oC) was also found, and this indicates the possibility
of freeze-thaw effects without positive temperatures.
Evidence for freeze-thaw events and their implications for rock weathering in northern Canada : II. The temperature at which water freezes in rock
British Columbia ; Canada ; Freeze-thaw cycle ; Rock ; Temperature ; Threshold ; Weathering
Data collected from northern Canada indicate that the temperature at which freezing occurs can vary substantially, even for the same site. The results indicate that any form of freeze-thaw event counting, in the absence of some indicator
of the presence of water and that it actually froze, is flawed, as thermal conditions alone are not adequate to indicate the occurrence or not of actual freeze-thaw weathering events. These data suggest that evaluations of freeze-thaw occurrence based simply
Evidence for freeze-thaw events and their implications for rock weathering in northern Canada
British Columbia ; Canada ; Chemical erosion ; Cold area ; Experimentation ; Freeze-thaw cycle ; Meltwater ; Temperature ; Weathering
. Temperature data were collected at 1 min intervals for 1 year. These data provide unequivocal proof for the occurrence of the freezing and thawing of water on and within the rock (freeze-thaw events). It was found that the temperature at which freezing occured