A Summary of Major Mineral Resources, Mines and Projects, 2nd Edition |
GENERAL ORE BODY MODEL
INTRUSIVE-RELATED (PORPHYRY-RELATED)
VEIN
DETAILED ORE BODY MODEL
MESOTHERMAL VEINS MAGMATIC-RELATED
Buck Quartz: Group 1/Event 1: 40Ar/39Ar date on |
sericite, biotite alteration of ~330Ma (Perkins & |
Kennedy, 1998). |
LATE CARBONIFEROUS
K-feldspar: Group 2/Event 2
LATE CARBONIFEROUS
Albite-Epidote: Group 2/Event 3
LATE CARBONIFEROUS
Potassic: Group 3/Event 4
LATE CARBONIFEROUS
Actinolite: Group 4/Event 5
LATE CARBONIFEROUS
BRECCIA
Chlorite breccia: Group 4/Event 6
LATE CARBONIFEROUS
BRECCIA
Magnetite: Group 4/Event 7
LATE CARBONIFEROUS
Quartz-Pyrite: Group 5/Event 8
LATE CARBONIFEROUS
Main gold event: Group 5/Event 9: Sericite |
alteration dated at 320 Myr (Neindorf et al, 1989) |
and 40Ar/39Ar date of 310Ma (Perkins & Kennedy, |
1998). |
LATE CARBONIFEROUS
Arsenopyrite: Group 5/Event 10
LATE CARBONIFEROUS
Chalcopyrite: Group 5/Event 11
LATE CARBONIFEROUS
BRECCIA
Calcite breccia: Group 6/Event 12
LATE CARBONIFEROUS
BRECCIA
Mill Breccia: Group 6/Event 13
LATE CARBONIFEROUS
The gold mineralisation occurs associated with veining and brecciation in the Jessops Creek Tonalite within the eastern part of the |
Ravenswood Batholith. Rock alteration and vein filling consist of multiple overprinted phases. |
The main gold bearing phase is characterised by phyllic alteration with gold occuring on grain boundaries and in fractures within |
sulphides. The highest grade mineralisation is within sphalerite and arsenopyrite. |