How sediments become mobilized

Geological Society Special Publication - Tập 216 Số 1 - Trang 9-20 - 2003
Alex Maltman1, A. J. Bolton1
1Institute of Geography and Earth Sciences, University of Wales, Aberystwyth, Wales SY23 3DB, UK

Tóm tắt

Abstract Geological sediments tend to strengthen during progressive burial but the interplay of porosity and permeability, strain and effective stress gives rise to numerous circumstances in which the strength increase can be temporarily reversed. The sediment becomes capable of bulk movement — sediment mobilization. Most explanations involve overpressuring, which results from additional loading being sustained by pore-fluid that is unable to dissipate adequately, leading to frictional strength reduction. The processes are highly heterogeneous, areally and with depth. The loads can be external (‘dynamic’) and both monotonic (e.g. a rapidly added suprajacent mass) and cyclic (e.g. the passage of waves), internal (e.g. the result of mineral reactions) and hydraulic (e.g. injection of external fluid). The sediments may become liquidized — that is, lose strength completely and behave as a fluid — through temporary fabric collapse (sensitive sediments) because loads are borne entirely by the pore-fluid (liquefaction), or by the grains becoming buoyant (fluidization), typically due to the ingress of externally derived fluids. In response to hydraulic gradients, buoyancy forces and reversed viscosity or density gradients, the weakened sediment may undergo bulk movement, though this requires failure of the enclosing material and sustained gradients. Mobilized but non-liquidized sediments retain some residual strength but can attain large shear displacements under critical state conditions.

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Tài liệu tham khảo

10.1144/gsjgs.134.1.0019

Allen J.R.L. Sedimentary Structures: their Character and Physical Basis Developments in Sedimentology 1984 30 Amsterdam Elsevier 663 pp

10.1029/2000JB900474

10.1016/S0098-3004(00)00140-0

Barber A.J., Tjokrosapoetro S., Charlton T.R. Mud volcanoes, shale diapirs, wrench faults, and melanges in accretionary complexes, Eastern Indonesia American Association of Petroleum Geologists, Bulletin 1986 70 1729 1741

10.1016/0098-3004(95)00113-1

10.1130/0091-7613(1999)027<0239:NSDOPA>2.3.CO;2

10.1016/S0025-3227(99)00115-2

10.1029/93JB01298

10.1016/0191-8141(93)90179-E

10.1130/0091-7613(1996)024<0843:PCFSRS>2.3.CO;2

Castro G. , Cakmak A.S. On the behavior of soils during earthquakes: liquefaction Soil Dynamics of Liquefaction 1987 Amsterdam Elsevier 169 204

10.1007/s003670050100

Clennell M.B. , Lovell M.A., Harvey P.K. Tortuosity: a guide through the maze Developments in Petrophysics 1997 122 299 344 Geological Society, London Special Publications

10.1016/S0040-1951(98)00215-7

10.1016/S0037-0738(98)00058-X

Dixon R.J., Schofield K., Anderton R., Reynolds A.D., Alexander R.W.S., Williams M.C., Davies K.G. , Hartley A.J., Prosser D.J. Sandstone diapirism and clastic intrusion in the Tertiary submarine fans of the Bruce-Beryl Embayment, Quadrant 9, UKCS Characterization of Deep Marine Clastic Systems 1995 94 77 94 Geological Society London, Special Publications

10.1016/S0377-0273(99)00110-9

10.1016/S0012-821X(99)00168-5

Freed R.L., Peacor D.R. Geopressured shale and sealing effect of smectite to illite transition American Association of Petroleum Geologists, Bulletin 1989 73 1223 1232

10.1139/t00-125

10.1139/t00-008

10.1180/claymin.1994.029.4.03

Harrison P. Rheological and numerical modelling of reverse-density structures 1996 294 pp Unpublished Ph.D. thesis University of Wales Aberystwyth

Hovland M, Judd A.G. Seabed pockmarks and seepages: Impaction on geology, biology and the marine environment 1988 London Graham & Trotman 293 pp

10.1016/0191-8141(88)90033-8

Jolly R.J.H. Lonergan L. Mechanisms and controls on the formation of sand intrusions Journal of the Geological Society in press

10.1007/978-94-011-0731-0_2

10.1130/0091-7613(2000)28<215:ROCITS>2.0.CO;2

Lewis D.W., Titheridge D.G. Small scale sedimentary structures resulting from foot impressions in dune sands Journal of Sedimentary Petrology 1978 48 835 837

Lonergan L., Lee N., Johnson H.D., Jolly R.J.H., Cartwright J.A. , Wiemer P., Slatt R.M., Coleman J., Rosen N.C., Nelson H., Bouma A.H., Styzen M.J., Lawrence D.T. Remobilization and injection in deepwater despositional systems: implications for reservoir architecture and prediction Deep-water Reservoirs of the world. GCSSEPM Foundation 20th Annual Bob F. Perkins Research Conference 2000 515 532

Luo X. R., Vasseur G. Contributions of compaction and aquathermal pressuring to geopressure and the influence of environmental conditions — reply to discussion American Association of Petroleum Geologists, Bulletin 1993 77 2011 2014

10.1007/978-94-011-0731-0_1

10.1130/0016-7606(2001)113<0545:WUPASS>2.0.CO;2

10.2475/ajs.299.6.429

10.1130/0091-7613(1995)023<0605:AFPAFZ>2.3.CO;2

Nicholls R.J. , Hartley A.J., Prosser D.J. The liquification and remobilization of sandy sediments Characterization of Deep Marine Clastic Systems 1995 94 63 76 Geological Society, London, Special Publications

10.1111/j.1365-3091.1994.tb01403.x

10.1061/(ASCE)1090-0241(2001)127:5(416)

10.1130/0016-7606(1990)102<0935:CHIRSZ>2.3.CO;2

Osborne M.J., Swarbrick R.E. Mechanisms for generating overpressure in sedimentary basins: a reevaluation American Association of Petroleum Geologists, Bulletin 1997 81 1023 1041

Owen G. , Jones M.E., Preston R.M.F. Deformation processes in unconsolidated sands Deformation of sediments and sedimentary rocks 1987 29 11 24 Geological Society, London, Special Publications

10.1016/S0267-7261(00)00032-4

Read W.F. Deformation in soft Ordovician sediment produced by large masses of sandstone from a neaby, but as yet undiscovered, impact crater 1st Annual Meeting of the Meteoritical Society, Lunar and Planetary Institute, Houston, TX 1988 665 p. D–3

10.1111/j.1365-3121.1989.tb00384.x

10.1680/geot.2001.51.2.115

Seed R.B. Cetin K.O. Moss R.E.S. Kammerer A.M. Wu J. Pestana J.M. Riemer M.F. Recent Advances in Soil Liquefaction Engineering and Seismic Site Response Evaluation 2001 National Information Service for Earthquake Engineering University of California Berkeley Paper SP-2. http://nisee.berkeley.edu/

10.1080/10641197809379798

Shipley T.H., Moore G.F., Tobin H.J., Moore J.C. , Shipley T.H., Ogawa Y., Blum P. Synthesis of the Barbados decollement seismic reflection response from drilling-based geophysical observations and physical properties 1996 156 Proceedings of the Ocean Drilling Program, Scientific Results 293 302

Stephenson E.L., Maltman A.J., Knipe R.J. , Parnell J. Dynamic permeability in deforming accretionary prism sediments Geofluids 93, fluid evolution, migration, and interaction in rocks 1994 78 113 125 Geological Society, London, Special Publications

Stump B.B., Flemings P.B. Overpressure and fluid flow in dipping structures of the offshore Gulf of Mexico (EI330 field) Journal of Geochemical Exploration 2000 69 70 23 28

10.1111/j.1365-3091.1983.tb00692.x

10.1016/S0169-1317(98)00057-X

10.1139/t00-040

10.1016/S0040-1951(00)00040-8

Vannucchi P. Maltman A. Clennell B. On the nature of scaly fabric and scaly clay Journal of Structural Geology in press

10.1144/jgs.157.1.105

10.1029/96JB00641

10.1029/98JB00952

10.1016/S0040-1951(01)00064-6

Yang W-C Fluidization, Solids Handling, and Processing 1999 New York William Andrew Norwich

Yassir N. , Knipe R.J., Rutter E.H. The behaviour of of overpressured clays and mudrocks Deformation Mechanisms, Rheology and Tectonics 1990 54 399 404 Geological Society, London, Special Publications

10.1061/(ASCE)1090-0241(2001)127:10(817)

10.1111/j.1365-246X.1998.tb07141.x

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Geological Society Special Publication

Tập 216 Số 1

9-20

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