Faulting

Fault Trace Identification, Nelson and Tasman (2001/02/05/06) and Marlborough (2007/08/09)

Desktop analysis, geologic reconnaissance mapping and selective test pitting techniques were used to identify (where possible) the precise location of potentially active traces of the Flaxmore and Waimea Faults in Nelson and Tasman District and to evaluate setback from the active Alpine Fault in St Arnaud and Renwick.

Left: Site plan showing the trace of the Flaxmore Fault, NCC Fault Hazard overlay, no-build zone straddling the fault trace, and slumping in the vicinity.

Pleasanton Fault Investigation, CPS Associates, California (1980)

Review and evaluation of 30 years of reports and investigations including detailed trench logging of 660 m of deep (5 m) exploration trenching across all reported traces of a fault to evaluate faulting surface rupture hazard for a 170 ha business park.  Specialized knowledge of the Alquist-Priolo Fault Zoning programme in California, USA.

Alpine Renwick Fault