File(s) not publicly available
Bedrock fracture by ice segregation in cold regions
journal contribution
posted on 2023-06-07, 17:14 authored by Julian MurtonJulian Murton, Rorik Peterson, Jean-Claude OzoufThe volumetric expansion of freezing pore water is widely assumed to be a major cause of rock fracture in cold-humid regions. Data from experiments simulating natural freezing regimes indicate that bedrock fracture results instead from ice segregation. Fracture depth and timing are also numerically simulated by coupling heat and mass transfer with a fracture model. The depth and geometry of fractures match those in Arctic permafrost and ice-age weathering profiles. This agreement supports a conceptual model in which ice segregation in near-surface permafrost leads progressively to rock fracture and heave, whereas permafrost degradation leads episodically to melt of segregated ice and rock settlement.
History
Publication status
- Published
Journal
ScienceISSN
0036-8075External DOI
Issue
5802Volume
314Page range
1127-1129Pages
3.0Department affiliated with
- Geography Publications
Notes
Challenges the assertion that fracture of porous bedrock is due to expansion of freezing water, and reveals that fracture is caused by ice-lens growth. The research was funded by NERC, presented as a keynote address (2nd European Permafrost Conference) and accompanied by a perspective in Science.Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC