Polygonal Vortex Model
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Dart geologists have developed the Polygonal Vortex Model - a predictive model which helps Dart focus exploration on porphyry target areas most likely to host precious or base metals mineralisation. The Model was developed as geologists gained a greater understanding of porphyry mineralisation by conducting geological, geophysical, metallogenic and structural evaluation and analysis through geological time scales, with the aid of 3D digital modelling. Strong groups of structures define mineralisation Corridors. The Model suggests a higher probability of disseminated gold mineralisation occurring in originally thin earth crust environments within certain structurally prepared sites. The Polygonal Vortex Model works by taking regional water geochemistry samples in which ground water analysis is able to help locate buried mineralisation. Deep faults and fracture systems associated with the intrusions allow ground water to reach the surface via springs and creeks carrying trace amounts of indicative metals. Tracking this water flow has been proven overseas to be a very useful tool in determining the occurrence of mineralisation. The very sensitive analysis method used by the Company is able to detect these metals at low levels, and will focus exploration as sample density increases. Hundreds of samples have been collected and analysed with the companies PVD6000 unit. The program has uncovered anomalous water drainages within all the Company’s ELs, including highly anomalous drainages about the Unicorn Porphyry within the Dart EL, and some gold reef trends in the Buckland EL. A number of differently orientated Corridors have now been identified by including the Dart, Zulu, Dinner Creek and Buckwong Creek Corridors, the Towong-Tawonga Corridor and the Empress and Mammoth Corridors. Subsequent geochemistry programs have confirmed and highlighted the mineralised environment around the Empress and Zulu Corridor intersection zone, an area which hosts the Unicorn and Morgan porphyry prospects within the Dart EL where significant molybdenum anomalies have now been identified. (see figure 2) The model highlights targets of enhanced disseminated mineralisation and has application in exploration from broad regional to detailed prospect scale within the corridors and local structures. |
Mineralisation corridorsclick to enlarge
3D Model of mineralisation corridorsclick to enlarge |
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Last updated August 2008 |
