Page 415 - NEWGEN21-Proceedings-Full

Evidence of an IRG System

IRG: Tell tale signs at El
Zorro include:

• Main host rocks dominated by
tonalite and granodiorite

• Partial melting of immediate
wallrocks, in close spatial
association with wollastonite-
bearing skarn

• Presence of exo- and endo-skarns
– garnet/actinolite/epidote, locally
cut by late stage felsic dykes

• Au and albite-quartz-sericite
bleaching around sheeted quartz
veins as system cooled

• Strong (brittle) structural controls
on mineralization

• Distinctive metal association with
relative low S content: As, Sb, Bi,
Te, W

TESORO RESOURCES (ASX:TSO) | EL ZORRO PRESENTATION 9