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Record #112080:

Effect of deformation on permeability / Garry K.C. Clarke, Tavi Murray.

Title: Effect of deformation on permeability / Garry K.C. Clarke, Tavi Murray.
Author(s): Clarke, Garry K. C.
Murray, Tavi.
Date: 1991.
In: Eos : transactions, American Geophysical Union. (1991.), Vol. 72(44, supplement) (1991)
Abstract: AGU Fall Meeting Program and Abstracts, December 9-13, 1991. Laboratory experiments suggest that deformation can result in 100-fold increase in permeability, and could have implications for glacier mechanics. Simple solution to analyze is that of layer of subglacial till overlying layer of permeable bedrock. If high pore-water pressure exists at ice-till contact, then water pressure will decrease with depth, reaching minimum at till-bedrock contact. If water pressure in uppermost till is high enough to induce sediment deformation, then associated increase in till permeability will cause zone of high water pressure to become thicker until most of till is pressurized and deforming.
Notes:

Eos : transactions, American Geophysical Union. Vol. 72(44, supplement) :158 (1991).

Keywords: 551.32 -- Glaciology.
551.324 -- Land ice.
551.324.22 -- Glaciers.
539.3 -- Ice, mechanical properties.
551.332.212 -- Till or boulder clay.
E5 -- Glaciology: land ice.
SPRI record no.: 112080

MARCXML

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005 20240304055739.0
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040 ## ‡aUkCU-P‡beng‡eaacr
100 1# ‡aClarke, Garry K. C.
245 10 ‡aEffect of deformation on permeability /‡cGarry K.C. Clarke, Tavi Murray.
260 ## ‡a[S.l.] :‡b[s.n.],‡c1991.
300 ## ‡ap. 158.
500 ## ‡aEos : transactions, American Geophysical Union. Vol. 72(44, supplement) :158 (1991).
520 3# ‡aAGU Fall Meeting Program and Abstracts, December 9-13, 1991. Laboratory experiments suggest that deformation can result in 100-fold increase in permeability, and could have implications for glacier mechanics. Simple solution to analyze is that of layer of subglacial till overlying layer of permeable bedrock. If high pore-water pressure exists at ice-till contact, then water pressure will decrease with depth, reaching minimum at till-bedrock contact. If water pressure in uppermost till is high enough to induce sediment deformation, then associated increase in till permeability will cause zone of high water pressure to become thicker until most of till is pressurized and deforming.
650 07 ‡a551.32 -- Glaciology.‡2udc
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.324.22 -- Glaciers.‡2udc
650 07 ‡a539.3 -- Ice, mechanical properties.‡2udc
650 07 ‡a551.332.212 -- Till or boulder clay.‡2udc
650 07 ‡aE5 -- Glaciology: land ice.‡2local
700 1# ‡aMurray, Tavi.
773 0# ‡7nnas ‡tEos : transactions, American Geophysical Union. ‡gVol. 72(44, supplement) (1991) ‡wSPRI-1028
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20240304