Characterization of Goldstrike ore carbonaceous material

Preg-Robbing Gold Ores

“…Nelson et al (1982) found the activated carbon structure to be present in a Carlin ore but not the hydrocarbon or humic acid carbons. Sibrell et al (1990), working also on Carlin ores, found very low concentrations of hydrocarbons but no humic acids present in the ore. Stenebråten et al (1999) did not find any detectable amounts of hydrocarbons in the Barrick Goldstrike ore. Tafuri (1987) did not find any humic acid in Mercur ore; the carbonaceous matter found was mostly aromatic with an activated carbon-type structure, similar in maturity to anthracitegrade coal (Sibrell et al, 1990;Stenebråten et al, 1999). Sibrell et al (1990), working also on Carlin ores, found very low concentrations of hydrocarbons but no humic acids present in the ore. Stenebråten et al (1999) did not find any detectable amounts of hydrocarbons in the Barrick Goldstrike ore. Tafuri (1987) did not find any humic acid in Mercur ore; the carbonaceous matter found was mostly aromatic with an activated carbon-type structure, similar in maturity to anthracitegrade coal (Sibrell et al, 1990;Stenebråten et al, 1999).…”

“…According to Rees and van Deventer (2000), this carbonaceous ore has kerogen as the principal preg-robbing component. In contrast, results from other studies seem to indicate that the carbonaceous matter is mostly aromatic with an activated carbon-type structure, similar in maturity to anthracite-grade coal (Sibrell et al, 1990;Stenebråten et al, 1999). In contrast, results from other studies seem to indicate that the carbonaceous matter is mostly aromatic with an activated carbon-type structure, similar in maturity to anthracite-grade coal (Sibrell et al, 1990;Stenebråten et al, 1999).…”

“…Rather, it was found that the carbonaceous material consisted of relatively featureless aromatic structures forming an activated carbon or graphite-type matrix with ether or thiocarbonyl functionality (Stenebråten et al, 1999;Schmitz et al, 2001a). Rather, it was found that the carbonaceous material consisted of relatively featureless aromatic structures forming an activated carbon or graphite-type matrix with ether or thiocarbonyl functionality (Stenebråten et al, 1999;Schmitz et al, 2001a).…”

“…New deposits both in the exploration and exploitation stages are located in Argentina (Minesite.com, 2000), Perú (Barrick, 2003;Noble and Vidal, 1990;Slaughter, 2004), Malaysia (Lewis, 2000), Australia (Pyke et al, 1999), Laos (Pan Australian Resources, 2003), Alaska, USA (McClelland, 2001), Russia (Celtic Resources, 2004;Grigg and Dorey, 2002;Whidden, 1997), Venezuela (Goode and Thomas, 2004), Fast East Russia (Hausen, 2000), and Niger (Parkgreen Communications, 2003). See also The presence of carbonaceous matter in an ore does not necessarily result in poor gold recovery (Sibrell, 1991;Stenebråten, 1998). See also The presence of carbonaceous matter in an ore does not necessarily result in poor gold recovery (Sibrell, 1991;Stenebråten, 1998).…”

“…These examples show that carbonaceous gold deposits are found around the world. It seems that carbon can exist in different forms in the ore, which show different affinities for the goldecyanide complex (Stenebråten, 1998). It seems that carbon can exist in different forms in the ore, which show different affinities for the goldecyanide complex (Stenebråten, 1998).…”