RE:RE:RE:RE:Sediments and Volcanic suite of rocks significance...Good question ballot. I only mentioned gold because it is the main economic ingredient that we are focusing on. In truth there are many different minerals that come with the gold through these hot springs. Here is a description of hemlo ores:
"Collectively, the ores are enriched in Au, Mo, Sb, Hg, As, TI, V, and Ba. Gold is commonly
disseminated along with molybdenite. Native gold grains are mercury rich and occur along
quartz-feldspar and pyrite grain boundaries and fractures, as well as inclusions in, or rimmed with, several varieties of sulphide minerals including, rarely, pyrite and molybdenite (Harris 1989). Visible gold is not common overall, but does occur within quartz veins in feldspathized, molybdenite-bearing rocks, along molybdenite-green-mica-bearing fractures, in stibnite- and cinnabarbearing quartz pods, and rarely in fractures in some of the plagioclase-porphyritic dikes. Molybdenite is the second most abundant sulphide, after pyrite, and occurs as fine- to very fine-grained, foliation-parallel blades, euhedral crystals, and platy masses mostly in association with silicate minerals, chiefly feldspar and quartz (Harris 1989)."
happy hunting