Hi Sculpin,
If we were take the 1% sulphides and apply the case for 60 to 300 ppm gold within the sulphide layer we would see the following within the parent ore body:
1/100 ( sulphide layer ) x ( 300/1,000,000 ) = 3 g/T ( 300 case )
This value is closer to your 1 g / T value ( thus 0.6 to 3 g/T in this case )
The author does not appear to be " literate in the sciences " or he had access to an assay of our gold zone ? Comment ?
Cal2000