I remember visiting Telfer in 1987 and seeing the reefs dipping at a low angle into the pit walls. Telfer was also seen as unusual then and I'm not sure there are too many replicas that I'm aware of. It always struck me as a giant oxidised stacked saddle reef system similar to Bendigo but much broader and flatter anticline legs. If true then the synclines may be equally hosting gold deposits and there may be repetitions at depth. The Telfer reefs are generally conformable with the geology.
Telfer was discovered by Day Dawn Minerals who never pegged it. Newmont vended the Telfer deposit into the Newcrest float so in effect Newcrest have owned it continuously from very early exploration days.
Telfer may have a number of similar buried deposits near it but they are hard to find with transported sand cover (have you seen the sand dunes out there?) and no geophysical signature to look for. This means lots of $ and lots of deep barren holes to understand the geology and structures better. I attach an extract on the geophysics. I find this encouraging as it indicates that they have by no means found everything yet!!!!!
And yes, a hungry mill will drive exploration much faster than anything else I can think of. There is certainly scope for more Telfers in that area and hopefully Antipa and Newcrest will find at least one.
GEOPHYSICAL CHARACTERISTICS OF
THE TELFER GOLD DEPOSITS, WESTERN AUSTRALIA
Michael A. Sexton
"The Telfer gold deposits are hosted by Middle Proterozoic marine sedimentary rocks of the northeastern
Paterson Orogen. They occur within two en echelon, asymmetric, doubly plunging anticlines, with ore being extracted from reefs and stockworks.
Regional magnetic and gravity surveys have been undertaken to assist in mapping stratigraphy, intrusions
and structures in the Telfer district. These surveys indicate the presence of intrusions close to the Telfer gold
deposits, which is regarded as supporting a genetic relationship between granitoids and mineralisation. The Telfer
mineralisation itself has no gravity or magnetic signature.
The narrowness of the reefs, deep oxidation and the presence of shallow, thin, electrically resistive beds
make the Telfer gold deposits a difficult geophysical target. "
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