CONSOLIDATION OF SEDIMENTS BY GLACIERS - RELATIONS BETWEEN SEDIMENT GEOTECHNICS, SOFT-BED GLACIER DYNAMICS AND SUBGLACIAL GROUNDWATER-FLOW

被引：84

作者：

BOULTON, GS

DOBBIE, KE

机构：

来源：

JOURNAL OF GLACIOLOGY | 1993年 / 39卷 / 131期

关键词：

D O I：

10.3189/S0022143000015690

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

A theory of subglacial consolidation is developed which shows how the meltwater flux beneath a glacier leaves a consolidation signature from which many important glacier-dynamic properties can be inferred. Conditions under which water is discharged through channels or in a thin film at the ice-bed interface or by ground-water flow are discussed, and it is concluded that glaciers flowing over aquifers of high transmissibility can induce deep circulation patterns quite different from non-glacial circulation. Examples of glacial pre-consolidation profiles in sediments from The Netherlands and England are used to illustrate how basal melting rates, subglacial ground-water flow patterns, ice overburden, basal shear stress, ice-surface profile and the amount of sediment removed by erosion can be inferred.

引用

页码：26 / 44

页数：19

共 23 条

[1] TILL BENEATH ICE STREAM-B .3. TILL DEFORMATION - EVIDENCE AND IMPLICATIONS
ALLEY, RB
BLANKENSHIP, DD
BENTLEY, CR
ROONEY, ST
[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1987, 92 (B9): : 8921 - 8929
[2] [Anonymous], 1970, CAN GEOTECH J, DOI DOI 10.1139/T70-015
[3] BERNHARD H, 1963, TH HANNOVER GEOLOGIS, V1
[4] Bohvarsson G, 1955, JOKULL, V5, P1
[5] Boulton G. S., 1979, J GLACIOL, V24, P29, DOI DOI 10.3198/1979J0G24-90-29-43
[6] Boulton G. S., 1974, GEOG ANNALER A, V56, P135, DOI 10. 1080/04353676. 1974. 11879895
[7] Boulton G. S., 1977, BRIT QUATERNARY STUD
[8] SEDIMENT DEFORMATION BENEATH GLACIERS - RHEOLOGY AND GEOLOGICAL CONSEQUENCES
BOULTON, GS
HINDMARSH, RCA
[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1987, 92 (B9): : 9059 - 9082
[9] CATT JA, 1977, P YORKS GEOL SOC
[10] Dahl R., 1965, GEOGRAFISKA ANN, V47A, P83

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