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Paper No. 152-18 Presentation Time: 1:30 PM-5:30 PM SULFIDATION, ADSORPTION, OR UNKNOWN ARSENIC LIGAND?
 

Summary: Paper No. 152-18 Presentation Time: 1:30 PM-5:30 PM SULFIDATION,
ADSORPTION, OR UNKNOWN ARSENIC LIGAND?
UNRAVELING THE MYSTERIES OF CARLIN-TYPE
DEPOSITS GRAVES, Robert S.1
, AREHART, Greg B.1
, and FUERSTENAU, Maurice,
C.2
, (1) Geological Sciences, University of Nevada, Reno, Geological Sciences MS-172,
University of Nevada, Reno, Reno, NV 89557, gravesr@scs.unr.edu, (2) Chemical &
Metallurgical Engineering, University of Nevada, Reno, Chemical & Metallurgical Engineering
MS-(388/312), University of Nevada, Reno, Reno, NV 89557
Early investigators suggested an active role for carbon in the genesis of Carlin-type deposits
based on the strong deposit-scale correlation between gold and carbon and also from the fact that
the organic material in Carlin-type deposits can adsorb gold complexed with ligands used during
the hydrometallurgical recovery of gold. More recent work has shown that there is no correlation
between gold and carbon at the millimeter to micron scale. Whereas cyanide is the main ligand
used in the hydrometallurgical extraction of gold from Carlin-type ore, the gold is thought to be
transported as a bisulfide complex during the formation of the deposits. Therefore, experiments
were conducted in order to determine whether or not gold bisulfide does indeed adsorb on
activated carbonaceous material. Experiments were conducted using a 500mL Pyrex reaction

  

Source: Arehart, Greg B. - Department of Geological Sciences, Mackay School of Mines, University of Nevada, Reno

 

Collections: Geosciences