Can Fault Leakage Occur Before or Without Reactivation? Results from an in Situ Fault Reactivation Experiment at Mont Terri

Repeating deep earthquakes: evidence for fault reactivation at great depth.

We have identified three groups of deep earthquakes showing nearly identical waveforms in the Tonga slab. Relocation with a cross-correlation method shows that each cluster is composed of 10 to 30 earthquakes along a plane 10 to 30 kilometers in length. Some of the earthquakes are colocated, demonstrating repeated rupture of the same fault, and one pair of events shows identical rupture complex...

An Evaluation of Rock Integrity and Fault Reactivation in the Cap Rock and Reservoir Rock Due to Pressure Variations

Cap rocks are dams which can prevent the upward movement of hydrocarbons. They have disparities and weaknesses including discontinuities, crushed areas, and faults. Gas injection is an effective mechanism for oil recovery and pore pressure. With increasing pore pressure, normal stress is reduced, and the integrity of impermeable boundaries (cap rock, fault, etc.) becomes instable. A successful ...

Groundwater Inrush Caused by the Fault Reactivation and the Climate Impact in the Mining Gafsa Basin (Southwestern Tunisia)

The Gafsa mining basin district in Southwestern Tunisia is one of the most important producers of phosphate in the world. The exploitation of this district started at the beginning of the twentieth century a few years after the first discovery of this valuable resource. The over-exploitation of groundwater to wash the phosphate caused water-level decline in the main aquifers and the corollaries...

Cenozoic reactivation of the Great Glen Fault , Scotland : Additional

13 The Great Glen Fault (GGF) trends NNE-SSW across northern Scotland. According to 14 previous studies, the GGF developed as a left-lateral strike slip fault during the Caledonian 15 Orogeny (Ordovician to Early Devonian). However, it then reactivated right-laterally in the 16 Tertiary. We discuss additional evidence for this later phase. At Eathie and Shandwick, minor 17 folds and faults in f...

From Experiment to Design – Fault