The rifting that is complex subsidence history mentioned previously has generated a variety of stratigraphy,

Framework and timing conducive to hydrocarbon generation and entrapment (Bell and Campbell, 1990). Thus far, but, significant discoveries have actually just been positioned within a few areas ( ag e.g. Hibernia, Terra Nova, Whiterose) of this Jeanne d’Arc that is northern basin. Main reservoirs can be https://datingmentor.org/reveal-review/ found in belated Jurassic and Early Cretaceous superficial marine and fluvial sandstones deposited through the 2nd rift and postrift stages. Later Jurassic shales for the Egret member have a source that is marine-rich matured during subsequent burial in the Belated Cretaceous and Tertiary. Traps had been created by the mid- Cretaceous from rollover anticlines ( ag e.g. Hibernia framework) and rotated fault obstructs, and so they had been mainly preserved through the subsequent Avalon uplift and erosion.

Figure 6. Seismic reflection profile LE 85-4 (Keen and de Voogd, 1988), remigrated and coherency filtered by J. Hall and S. Deemer (individual interaction, 2001). Seismic perspectives identified are Au/A* (Oligocene and Top Cretaceous) and U (Tucholke et al., 1989). Basement types that are crustal defined by characteristic alterations in representation pattern.

Many research has focused regarding the Jeanne d’Arc basin along with other water that is shallow regarding the Banking institutions. Merely a wells that are few been drilled in much much much deeper water. Nonetheless, the sediment circulation map (Figure 5a) suggests that significant thicknesses occur beneath many regions of the increase and slope bordering the Banking institutions ( ag e.g. Southern Whale, Salar, Carson-Bonnition, Flemish Pass and Orphan basins). Recently, extra seismic research has been undertaken during these much much much deeper water basins to help expand assess its financial potential. Past analysis associated with much much much deeper regions that are offshore made making use of a few local seismic pages gathered in the mid- 1980’s ( ag e.g. Keen and de Voogd, 1988; Tucholke et al., 1989). A far more current group of local pages (Figure 5) now expands this protection over the northern Newfoundland basin. The much much deeper water an element of the profile that is LE85-4 shown in Figure 6 (J. Hall and S. Deemer, individual interaction, 2001) and a quick element of the current Ewing2000-3 profile (Louden and Lau, 2002) over the Carson basin in Figure 7. A group of tilted basement fault obstructs is seen as much as 100 kilometer seaward through the rack break. The foremost is a block that is large with a few sodium address that divides the overseas region of the Carson-Bonnition basin into shallower and much much much deeper water parts. The deep-water area of thicker sediment and complex cellar framework may contain the potential that is best for hydrocarbons (Enachescu, 1992).

Figure 7. Reflection that is seismic Ewing 2000-3 over the exterior Carson-Bonnition basin showing cellar ridge with possible sodium that separates basin into internal (shallow) from outer (deep water) components.

Seismic perspectives identified are Au/A* and U, after Tucholke et al. (1989). Observe that these perspectives pinch out and terminate against basement and should not be traced into shallower water.

Further seaward associated with faulted cellar, a 100-km wide area exists the place where a prominent reflector (U) masks the underlying cellar. This reflector seems to end against a few elevated cellar highs. Above the U-reflector, the A u _ A * reflector defines the Tertiary change between flat-lying and bottom present dominated depositional sequences. It isn’t particular in the event that U-reflector is related into the Avalon unconformity for the southern Banking institutions and/or the Early Cretaceous ?-reflector observed from the margin that is scotianFigure 4). The type regarding the reasonably flat-lying cellar within this transitional area can also be uncertain. Current drilling and seismic outcomes suggest the clear presence of a wide area of serpentinized basement that is peridotite a conjugate establishing beneath the Iberia margin (Louden and Lau, 2002). A comparable model had been formerly proposed by Enachescu (1992) when it comes to Newfoundland basin. Feasible drilling goals to resolve these problems happen selected along Ewing that is profile 2000-2 the north the main basin (Figure 8). A drilling leg associated with Ocean Drilling Program is planned with this operate in July-Sept 2003.

Figure 8. Seismic expression profile and location of proposed Ocean Drilling Program drilling internet web web internet sites within the Newfoundland basin (Tucholke et al., 2002). Seismic perspectives Au and U are defined as per Figure 7. For general location map begin to see the Ocean Drilling Program internet site (http: //www-odp. Tamu.edu/publications/tnotes/fy03/210ab. Html)

To the northwest of Flemish Cap, a tremendously wide area of dense sediment exists within Orphan basin.

This region experienced rifting episodes that might have extended in to the belated Cretaceous. All of the basin is underlain by highly thinned continental crust but its deep water has precluded drilling activity that is much. The gravity highs from the rack advantage (Figure 5b) shows a difference that is significant gravity lows connected with all the other basins. It has been modeled by changing the low crust with mantle, suggesting the current presence of a failed rift that had been abandoned whenever continental breakup shifted further to your northeast (Chian et al., 2001). An extremely dense series of Tertiary sediment when you look at the much deeper water elements of Orphan basin suggests a predominance of post-rift in the place of syn-rift subsidence (Keen and Dehler, 1993).

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