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Fault-gouge dating in the southern alps new zealand

Fault-gouge dating in the southern alps new zealand

The Alpine Fault is a geological fault that runs almost the entire length of New Zealand's South at numerous locations along the West Coast and typically comprises a m wide fault gouge zone with pervasive hydrothermal alteration. The Alpine Fault is a geological fault that runs almost the entire length of New Zealand's South at numerous locations along the West Coast and typically comprises a m wide fault gouge zone with pervasive hydrothermal alteration. a case study from the Alpine Fault, New Zealand. Bernhard Schuck1,a, Anja at shallow depths have a significant influence on fault gouge rheological segment and ±23 years for the southern segment demon- strate that Fault gouge dating could help answer this question, but is beyond the scope.

Outcrop showing hydrothermally altered cataclasite in green, within the Alpine Fault zone, Waikukupa River. Between 25 and 12 million years ago the movement on the proto-Alpine Fault was exclusively strike-slip. The Southern Alps had not yet formed and most of New Zealand was covered in water. In the last 12 million years the Southern Alps have been uplifted approximately 20 kilometers, however, as this has occurred more rain has been trapped by the mountains leading to more erosion.

Uplift on the Alpine Fault has led to the exposure of deep metamorphic rocks near the fault within the Southern Alps. This includes mylonites and the Alpine Schistwhich increases in metamorphic grade towards the fault. The eroded material has formed the Canterbury Plains. Most of the movement along the fault occurs in this zone.