--> --> Fault Linkage Styles in Rifts: Observations From Northern North Sea Rift Basin
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Previous HitFaultNext Hit Linkage Styles in Rifts: Observations From Northern North Sea Rift Basin


Normal Previous HitfaultNext Hit systems and Previous HitfaultNext Hit population are the result of an evolutionary process from nucleation to the development of large and sometimes complicated Previous HitfaultNext Hit arrays, an evolution that in most cases involves various types of Previous HitfaultNext Hit interaction. During the process of Previous HitfaultNext Hit growth, tips of individual faults interact as their strain fields overlap, which may lead to a history of Previous HitfaultNext Hit linkage through the formation and eventually destruction (breaching) of relay structures. On the geologic timescale, Previous HitfaultNext Hit linkage structures are transient elements of a normal Previous HitfaultNext Hit population, implying variations in their spatial and temporal distribution according to the level of structural observation. It implies a complex segmented three-dimensional Previous HitfaultNext Hit geometry. The present study is based on 2D and 3D seismic interpretation to analyse the Previous HitfaultNext Hit linkage styles along individual Previous HitfaultNext Hit systems and across Previous HitfaultNext Hit arrays in northern North Sea rift system. The observations are consistent with other's observations that, Previous HitfaultNext Hit linkage represents a fundamental role in the formation of large Previous HitfaultNext Hit systems. This is observed by the along-strike throw distribution in the master faults, where many throw minima are observed. These points of throw minima, which are not related to Previous HitfaultNext Hit-propagation folding, are interpreted as linkage points. The relay ramps, which represent the main expressions of interaction and linkage, are not often seen along the master faults due the high displacements rates acquired after linkage, which implied the relay ramps destruction. In addition, the points of throw minima match regions of marked changes in Previous HitfaultNext Hit strike. Where relay ramps are preserved, many features are observed. Scaling parameters may, or may not characterize an end-member type. The relationship between offset and Previous HitfaultNext Hit overlap does not characterize an end-member type. All the relay ramp types may occur in any separation-overlap ratio from two to four. However, the curvature of unbreached relay ramps represents the lower values of mean dip, while breached examples show the higher values. In addition, the mean dip values of breached ramps show a bimodal distribution of low and high values. One explanation is, if the development of secondary failure across the relay ramp occurs early in the Previous HitfaultTop sequence, the rotated area may show little differential rotation, whereas at a late stage the breached area may retain the high original curvature of the original relay ramp