Page 226 - NEWGEN21-Proceedings-Full

Thursday’s Gossan – Our Early Exploration

Lighter S isotopes associated with the later

porphyries

(this dataset includes 105 recently received ɗ34 S determinations

from the Cayley Lode)

Interpreted to reflect:

Proximity to the magmatic source
1.

2. The strongly oxidised fluid responsible for mineralisation

3. Given we are not yet in the ‘core’ potassic alteration /

mineralisation zone, these fluids appear to be especially

oxidised – enhanced capacity for copper-gold
S ISOTOPE STATISTICS

Mineral Number Mean S.D. Skewness mineralisation
pyrite 260 -1.82 3.87 -4.04

chalcopyrite 65 -3.40 5.97 -2.82
anhydrite 12 17.11 4.41 -0.63
bornite 2 -3.35

chaclcocite 1 1.46

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