FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2549862893> ?p ?o ?g. }

• W2549862893 endingPage "54" @default.
• W2549862893 startingPage "35" @default.
• W2549862893 abstract "Pore fluid pressure is a key parameter for subaquatic slope stability and has been put forward to explain the development of many submarine landslides, especially when occurring on very gentle slopes or in areas with high sedimentation rate. Due to the sparse availability of in-situ pore pressure data, a profound understanding and quantification of excess pore pressure development and its influence on subaquatic landslide processes is still missing. In this study, we use glacigenic Lake Villarrica (Chile) as a model basin, in which we document in-situ excess pore pressure, focused fluid escape features and subaquatic slope failures at relatively shallow subsurface depth (< 10 m). A subaquatic slope was characterized in great detail by a dense network of high-resolution seismic-reflection profiles, multibeam bathymetry and sediment cores. In-situ undrained shear strength and formation pore fluid pressures were documented using free-fall piezocone penetrometer (CPTU) and subsequent pore pressure dissipation tests. We show four independent lines of evidence for overpressure of variable magnitude within the sedimentary slopes: i) pockmarks and other fluid escape features on seismic profiles and bathymetric maps, ii) estimation of ambient in-situ pore pressure via CPTU dissipation tests, iii) underconsolidation and downward decrease in in-situ undrained shear strength within units of uniform lithology, and iv) hydrofractured glacio-lacustrine sediments. Locally, overpressure reaches about 80–90% of the hydrostatic vertical effective stress. We hypothesize that glacier-proximal sediments are strongly underconsolidated and overpressured due to rapid deposition and/or subglacial meltwater pumping. Postglacial consolidation of a thick glacier-proximal unit leads to the upward expulsion of excess pore water. A permeability barrier is formed by the overlying glacio-lacustrine clays and fine silts, focusing these migrating fluids to topographic highs. There, very high overpressure ratios facilitate the development of hydro-fractures, repeated fluid escape and pockmarks on the lake bottom. Overpressure may decrease slope stability in Lake Villarrica in different manners: by focused fluid escape weakening sediments, by generating underconsolidated sequences of low undrained shear strength, and by facilitating static failure. Based on high-quality in-situ data, this study confirms that high overpressure ratios in shallow sediments may be a typical feature at formerly-glaciated marine and lacustrine environments and highlights the major role of pore fluid overpressure for preconditioning subaquatic slopes to failure." @default.
• W2549862893 created "2016-11-30" @default.
• W2549862893 creator A5017955623 @default.
• W2549862893 creator A5022423253 @default.
• W2549862893 creator A5024999277 @default.
• W2549862893 creator A5038005539 @default.
• W2549862893 creator A5039594257 @default.
• W2549862893 creator A5044741778 @default.
• W2549862893 creator A5056249029 @default.
• W2549862893 creator A5061933718 @default.
• W2549862893 creator A5062944702 @default.
• W2549862893 date "2017-01-01" @default.
• W2549862893 modified "2023-10-10" @default.
• W2549862893 title "The influence of overpressure and focused fluid flow on subaquatic slope stability in a formerly glaciated basin: Lake Villarrica (South-Central Chile)" @default.
• W2549862893 cites W1490518207 @default.
• W2549862893 cites W1544618329 @default.
• W2549862893 cites W1552000043 @default.
• W2549862893 cites W1707382625 @default.
• W2549862893 cites W1934823348 @default.
• W2549862893 cites W1941032911 @default.
• W2549862893 cites W1958241402 @default.
• W2549862893 cites W1964701267 @default.
• W2549862893 cites W1965475153 @default.
• W2549862893 cites W1966473864 @default.
• W2549862893 cites W1975917567 @default.
• W2549862893 cites W1978156774 @default.
• W2549862893 cites W1979684077 @default.
• W2549862893 cites W1981955402 @default.
• W2549862893 cites W1982075050 @default.
• W2549862893 cites W1988053752 @default.
• W2549862893 cites W1988818635 @default.
• W2549862893 cites W1997385647 @default.
• W2549862893 cites W1997576574 @default.
• W2549862893 cites W2003356010 @default.
• W2549862893 cites W2011649654 @default.
• W2549862893 cites W2016091494 @default.
• W2549862893 cites W2016107470 @default.
• W2549862893 cites W2021131530 @default.
• W2549862893 cites W2023853281 @default.
• W2549862893 cites W2026178069 @default.
• W2549862893 cites W2026385272 @default.
• W2549862893 cites W2028675888 @default.
• W2549862893 cites W2029525469 @default.
• W2549862893 cites W2029760019 @default.
• W2549862893 cites W2031600571 @default.
• W2549862893 cites W2034915239 @default.
• W2549862893 cites W2036332581 @default.
• W2549862893 cites W2039986204 @default.
• W2549862893 cites W2045149940 @default.
• W2549862893 cites W2047535748 @default.
• W2549862893 cites W2048572409 @default.
• W2549862893 cites W2048980914 @default.
• W2549862893 cites W2050992926 @default.
• W2549862893 cites W2051631495 @default.
• W2549862893 cites W2051699473 @default.
• W2549862893 cites W2055832005 @default.
• W2549862893 cites W2059392359 @default.
• W2549862893 cites W2062148559 @default.
• W2549862893 cites W2063261374 @default.
• W2549862893 cites W2064254065 @default.
• W2549862893 cites W2071965390 @default.
• W2549862893 cites W2077522228 @default.
• W2549862893 cites W2078760366 @default.
• W2549862893 cites W2084008930 @default.
• W2549862893 cites W2084107403 @default.
• W2549862893 cites W2090671389 @default.
• W2549862893 cites W2092058025 @default.
• W2549862893 cites W2108854556 @default.
• W2549862893 cites W2113329785 @default.
• W2549862893 cites W2115793947 @default.
• W2549862893 cites W2119578256 @default.
• W2549862893 cites W2121217689 @default.
• W2549862893 cites W2122658527 @default.
• W2549862893 cites W2123961996 @default.
• W2549862893 cites W2124545721 @default.
• W2549862893 cites W2124632811 @default.
• W2549862893 cites W2124956995 @default.
• W2549862893 cites W2134010836 @default.
• W2549862893 cites W2142553590 @default.
• W2549862893 cites W2152071540 @default.
• W2549862893 cites W2157081732 @default.
• W2549862893 cites W2159973689 @default.
• W2549862893 cites W2160312510 @default.
• W2549862893 cites W2162643795 @default.
• W2549862893 cites W2165248235 @default.
• W2549862893 cites W2168157128 @default.
• W2549862893 cites W2168797524 @default.
• W2549862893 cites W2170157308 @default.
• W2549862893 cites W2260173701 @default.
• W2549862893 cites W2274738237 @default.
• W2549862893 cites W2280639553 @default.
• W2549862893 cites W2333872999 @default.
• W2549862893 cites W248179823 @default.
• W2549862893 cites W4239038294 @default.
• W2549862893 cites W4239930194 @default.
• W2549862893 doi "https://doi.org/10.1016/j.margeo.2016.11.012" @default.
• W2549862893 hasPublicationYear "2017" @default.
• W2549862893 type Work @default.

• next