Stream
sediment geochemical analyses from 140 mining company exploration surveys of the
Coromandel, Northwest Nelson, Marlborough and Westland regions of New Zealand
have been compiled from open file reports and entered on a database called
REGCHEM (for Regional Exploration GeoCHEMistry). REGCHEM is supported by
GEOEXPL, a custom-written computer software application which operates under the
Microsoft Access relational database management system on a PC-type computer,
The data are plotted as maps using the MapInfo geographic information system
(GIS) package. Thresholds separating anomalous values from background values are
determined using the PROBPLOT uni-variant statistical package, which enables the
discrimination and modelling of several populations. Relevant REGCHEM data are
being incorporated into a GIS for the Coromandel region as part of ongoing
studies to develop mineral deposit and metallogenic models for the region, and
to assess regional prospectivity.