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Abstract: The Kangâmiut ridge, offshore southern West Greenland, was formed by fault movements that separate the ridge into two elongate segments. The Kangâmiut-1 well was drilled on the western flank of the northern segment of the ridge and terminated in Precambrian basement. Gravity data show that the two segments of the ridge may be different in composition. The unfiltered Bouguer gravity data show fairly constant values over the southern segment declining to the north, whereas the high-cut filtered gravity data show a marked difference in the anomalies over the two segments that mirrors their structural division. Forward modelling of the gravity data indicates the presence of sedimentary wedges on the flanks of the ridge below top basement as interpreted from seismic reflection data. The possible presence of sedimentary wedges along the flanks of the Kangâmiut ridge widens the possibilities of explaining the apparent presence of hydrocarbons in the Kangâmiut-1 well that was unproperly tested, and the consequent petroleum potential of the southern West Greenland area. [Copyright &y& Elsevier]

Abstract: A prograding and aggrading depositional system has been mapped from seismic data in the Sisimiut Basin, offshore West Greenland. Seismic stratigraphic analysis resulted in mapping of three seismic sequences and internal boundaries. Mounds at the base of the prograding sequences may represent massflows, which could be prospective. The sealing deposits are Cretaceous claystone, indicated by correlation to the Ikermiut-1 well. Local closures of mounds, regional seal and hydrocarbon traces in the region indicate a potential for stratigraphic hydrocarbon leads. Amplitude interpretation indicates possible mass-flow deposits within the sequences as well as half-graben syn-rift deposits below, both of which may be prospective. [Copyright &y& Elsevier]

Abstract: The continental margin of Baffin Island was interpreted from a compilation of seismic reflection and potential field data. Based on these data, it was divided into volcanic and non-volcanic segments. In the northernmost area, coast-parallel grabens and continental basement highs are superseded beneath the slope by irregular basement topography. In combination with the velocities from refraction data and the lack of a magnetic slope anomaly, we propose a non-volcanic margin. In the central region, the seismic data show a limited region with a seaward dipping reflector sequence that may be intercalated with a sedimentary section. Both north and south of Cape Dyer extensive volcanic rocks are interpreted at and below seabed consistent with a volcanic margin. In the southern region, the depth to basement drops rapidly offshore. A thick prograding sedimentary wedge produces a high-amplitude long-wavelength free-air gravity anomaly that was previously confused with the continent–ocean boundary. Although some volcanic rocks are mapped in the region, this area is adjacent to the non-volcanic Labrador Sea margin and is interpreted to be of similar structure. Segmentation of the margin by major faults can explain the abrupt transitions from volcanic to non-volcanic margin segments. The continent–ocean boundary for the region is determined based on the potential field and seismic data. Along the Greenland plate in Davis Strait the continent–ocean boundary coincides with the Ungava Fault Zone. The continent–ocean boundary is used in conjunction with published poles of rotation to evaluate plate reconstructions at chrons 33n and 27n. The earlier reconstruction produces an extensive overlap of boundaries in the north. The later reconstruction shows a gap in the southern region. Thus, additional information is required to refine the reconstructions. [Copyright &y& Elsevier]