Ann: Gold Extraction Results from Ema and Tres Estados, page-221

Well that's closer to home: The Boddington goldmine's gold ([email protected]/t Au for 1160t Au) is related to a diorite intrusion (medium-grained **bro).

"The Wandoo deposit is interpreted as a structurally-controlled, intrusion-related, Au-Cu deposit, formed by two overprinting magmatic-hydrothermal systems. The first has ‘porphyry-like’ characteristics, associated with dioritic intrusion at ~2700 Ma, the other coeval with a barren post-tectonic granitoid at ~2612 Ma. Although gold is associated with both events, the main stage, particularly the high-grade mineralisation, appears synchronous with the latter (McCuaig et al., 2001)."



http://www.portergeo.com.au/database/mineinfo.asp?mineid=mn221