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02h0023603 20110420155415.0 cr un||||||||| 110414s2000 xx ||||f|||d||||||||eng | AAI9991472 0599990082(ebk.) : CNY371.35 NGL NGL NGL a371 Swenson, John Bradley. Fluid flow and sediment transport in evolving sedimentary basins [electronic resource] / John Bradley Swenson. 2000. 178 p. : digital, PDF file. Source: Dissertation Abstracts International, Volume: 61-10, Section: B, page: 5204. ; Advisers: Mark Person; Chris Paola. Thesis (Ph.D.) -- University of Minnesota, 2000. This thesis consists of three studies that focus on groundwater flow and sediment transport in evolving sedimentary basins. The first study considers the subsurface hydrodynamic response to basin-scale transgression and regression and its implications for stratiform ore genesis. I demonstrate that the transgressive sequence focuses marginward-directed, compaction-driven discharge within a basal aquifer during progradation and deposition of the overlying regressive sequence, isolates the basal aquifer from overlying flow systems, and serves as a chemical sink for metal-bearing brines. In the second study, I develop a new theory for the shoreline response to subsidence, sediment supply, and sea level. In this theory, sediment transport in a fluvio-deltaic basin is formally equivalent to heat transfer in a two-phase (liquid and isothermal solid) system: the fluvial system is analogous to a conduction-dominated liquid phase, the shoreline is the melting front, and the water depth at the delta toe is equivalent to the latent heat of fusion. A natural consequence of this theory is that sediment-starved basins do not possess an equilibrium state. In contrast to existing theories, I do not observe either strong phase shifting or attenuation of the shoreline response to low-frequency eustatic forcing; rather, shoreline tracks sea level over a spectrum of forcing frequencies, and its response to low-frequency forcing is amplified relative to the high-frequency response. For the third study, I use a set of dimensionless numbers from the previous study as a mathematical framework for providing a unified treatment of existing stratigraphic theories. In the limit of low-amplitude eustatic forcing, my study suggests that strong phase shifting between shoreline and sea level is a consequence of specifying the sedimentation rate at the shoreline; basins free of this constraint do not develop strong phase shifts. Sedimentation and deposition. ; Sedimentary basins. ; Sedimentation analysis. University of Minnesota. aCN bNGL http://proquest.calis.edu.cn/umi/detail_usmark.jsp?searchword=pub_number%3DAAI9991472&singlesearch=no&channelid=%CF%B8%C0%C0&record=1 NGL Bs193 rCNY371.35 ; h1 bs1104
