| 000 | 02642nab a2200217 4500 | ||
|---|---|---|---|
| 005 | 20260520000323.0 | ||
| 008 | 260224s2015 xxu ing | ||
| 041 | _aInglés | ||
| 245 | 0 | 0 |
_aStratigraphic evolution of intraslope minibasins _bInsights from surface-based model |
| 260 |
_a _b _cjun. 2015 |
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| 270 | _a17/10/2017 ; 17/10/2017 | ||
| 300 | _a30 p. ; 1099-1129 | ||
| 520 | _aTranscripción del resumen del autor: Although numerous case studies exist to illustrate the large-scale Previous HitstratigraphicNext Hit architecture of salt-withdrawal minibasins, there is no clear understanding of how stratal patterns emerge as a function of the interplay between basin subsidence and sedimentation. Here we present a simple model of mass balance in minibasin sedimentation that focuses on the interaction between long-term sediment supply and basin-wide subsidence rate. The model calculates the sediment flux in three dimensions assuming a simplified basin and deposit geometry. The main model output is a cross section that captures the large-scale Previous HitstratigraphicNext Hit patterns. This architecture is determined by the relative movement of the stratal terminations along the basin margin: consecutive pinchout points can (1) be stationary, (2) move toward the basin edge (onlap), or (3) move toward the basin center (offlap). The direction and magnitude of this movement depend on the balance between the volume made available through subsidence, calculated only over the area of the previous deposit, and the volume needed to accommodate all the sediment that comes into the basin. Cycles of increasing-to-decreasing sediment supply result in Previous HitstratigraphicNext Hit sequences with an onlapping lower part and offlapping upper part. If the sediment input curve is more similar to a step function, Previous HitstratigraphicTop sequences only consist of an onlapping sediment package, with no offlap at the top. Modeling two linked basins in which deposition takes place during ongoing subsidence shows that conventional static fill-and-spill models cannot correctly capture the age relationships between basin fills. In general, lower sediment input rates and periods of sediment bypass result in sand-poor convergent stratal patterns, and episodic but high volumetric sedimentation rates lead to well-defined onlap with an increased probability of high sand content. | ||
| 581 | _a6 | ||
| 773 | 0 |
_tAAPG Bulletin _g |
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| 942 | _cARTICULO | ||
| 100 | 1 |
_aSylvester, Zoltán _957373 |
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| 100 | 1 |
_aCantelli, Alessandro _957374 |
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| 100 | 1 |
_aPirmez, Carlos _957375 |
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| 999 |
_c191350 _d191350 |
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