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0361-0128/01/3373/1159-13 $6.00 1159 Introduction

Summary: 0361-0128/01/3373/1159-13 $6.00 1159
CARLIN-TYPE disseminated gold deposits are among the most
important types of gold systems in the world because of their
large resources and relatively low cost of production. The
Carlin deposit (type locality) is located in northeast Nevada,
40 km northwest of the town of Elko (Fig. 1). The Carlin
trend in northeastern Nevada hosts several important indi-
vidual deposits and, as of 1997, in excess of 100 Moz of gold
had been identified along this trend (Teal and Jackson, 1997).
The geology of Carlin-type gold deposits has been sum-
marized by Radtke (1985), Arehart (1996), and Hofstra and
Cline (2000). Carlin-type gold deposits comprise large dis-
seminated deposits with the Au hosted as submicron inclu-
sions or lattice constituents in hydrothermal pyrite and
quartz. Gold is present primarily as a lattice constituent of
arsenian pyrite. Associated with the deposition of Au are
anomalous As, Sb, Hg, Tl, and Ba. Gold deposition has been
observed to be strongly controlled either lithologically,
structurally, or both. Host rocks for the deposits are pre-


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


Collections: Geosciences