Basalt - WikipediaBasalt is a common extrusive igneous (volcanic) rock formed from the rapid cooling of basaltic .. Note white plagioclase "microlites" in cross-polarized light picture, .. including gold deposits, copper deposits, volcanogenic massive sulfide ore . Underwater basalt deposits, scattered in seas around the globe, have the.gold ore in white basalt,Ancient Hawaiians: Plenty of Oars but No OresOct 1, 2009 . . showing Pu`u `Ō `ō fuming in the foreground (note the dense white fume from a vent in . For example, about one-third of Hawaiian basalt is iron oxide, . Vein ores yield copper, lead, zinc, gold, silver, tin, and other metals.
gold ore in white basalt