APAALSE - Paper - Caris

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Digital Atlas for the purpose of illustrating the general slope morphology and selecting optimal FOS points. Figure 9: Result of the GEODAS database bathymetric & geophysical cruise survey search in the Gulf of Guinea by institution source. The FOS profile line can be drawn in the Caris Lots software. Each profile line was analyzed using the underlying Raster bathymetric data sources (ETOPO2, and GEBCO1) and the GEODAS ship tracks. In all, 65 lines were chosen from four different GEODAS databases to cover the entire continental margin and the abyssal plain. The Douglas-Peucker filter from the Caris Lots software’s ‘Foot of the Slope Tool’ which applies a linear approximation of bathymetric profiles was applied to identify the FOS markers. 10
A review of the over 700 2D SEGY lines supplied by the Ghana National Petroleum Corporation (GNPC), showed that some of these lines could well be used to locate the FOS positions in some areas. Unfortunately, these data were not incorporated into this study due to lack of time. The 1% sediment thickness Formula Line (Gardiner Line) The Caris Lots software was used to calculate the sediment thickness position at each point along the FOS profiles and 1% sediment thickness points were determined. The individual 1% sediment point markers were then connected together to form the 1% sediment thickness line commonly referred to as the Gardiner Line (Figure 10). Figure 10: The Gardiner Formula line showing SED Profile lines closely spaced yellow lines) and the individual FOS markers (yellow and black circles). The black circles are from the coarse-gridded sediment model. The individual 1% sediment markers (black triangles on the yellow lines) are the individual results of the 1% sediment positions. In this DTS, two individual sediment models were used and these two models produced different results. The inner row of 1% sediment thickness came from the analysis of the Fine Sediment Raster Model; the outer row of 1% sediment points came from 11
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Page 17 and 18: Conclusions and Recommendations The

APAALSE - Paper - Caris

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