Structural reactivation

Introduction: Structural reactivation is very common, and while we have touched upon it intermittently during this course, it is worth focused consideration. Fundamentally, reactivation reminds us that anisotropy is perhaps the most important structural trait of rock bodies.

How can reactivation be recognized?

Factors that promote reactivation?

Reactivation within continental interiors:

Billefjorden fault zone – an example of a long-lived tectonic lineament in Spitsbergen, Norway, with a history of repeated reactivation. The overview map to the right shows its position. The Odellfjellet and Balliolbreen faults are two major strands of the fault zone. The green pattern is where rift basin fill rocks outcrop.

View to North of major strand of BFZ juxtaposing dark basement rocks on the west side against light colored carbonate, evaporite and clastic fill on the east side. A close look shows the hinge of a major syncline on the grey mountain peak.

Some related references: