(1982), Perth, Western Australia (1987), Araxa, Brazil (1991), Novosibirsk, Russia (1995), Cape Town (1998)...more than 200 km beneath the ca. 3.2 Ga Winnipeg River terrane (White et al. 2003). The upper boundary...to mark the boundary of the Mesoarchean Winnipeg River terrane with the lower crust of the ca. 3 Ga Uchi...international kimberlite conference 1991, Araxa, Brazil, vol 2, CPRM special publication 1B, pp 215–235...kimberlite containing alkali carbonate, gypsum, halite, and other Na-, Cl-, and S-rich minerals has been |