Undiscovered Locatable Mineral Resources in the Bay Resource Management Plan Area, Southwestern Alaska: A Probabilistic Assessment

Scientific Investigations Report 2007-5039

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007-5039

Table 7. Grade and tonnage data for 13 shallow-to-intermediate level intrusion-related gold deposits worldwide.

[Abbreviations: gpt, gram per metric ton; oz, Troy ounce; Au, gold; ppm, parts per million]

Location	Name	Date of data	Category of resource	Tonnage (million tonnes)	Grade (gpt=ppm)	Million oz. Au	Reference	Comments
Yukon	Brewery Creek		production (oxide ore)	17.1	1.44		Diment and Simpson, 2003
Southwest Alaska	Chicken Mountain		inferred resource?	14.5	1.2		Bundtzen and others, 1992
Interior Alaska	Dolphin		inferred resource?	30	0.68	0.6	Flanigan and others, 2000; Avalon Development Corp., 2005
Southwest Alaska	Donlin Creek	2005	resources (measured, indicated and inferred)	205.14	3.5	23.09	Ebert and others, in press	“average grade”
Southwest Alaska	Golden Horn	1992	production	2.85	1.2		Bundtzen and Miller, 1997
Australia	Kidston	1991	inferred resource?	94	1.48		Baker and Andrew, 1991; Baker, 2002
Bolivia	Kori Kollo	inferred resource?	64	2.3	4.83	Petersen and Fitzmayer, 1998; Baker, 2002
Southwest Alaska	Owhat-Mission Creek	1991	inferred resource?	0.229	4.498		Bundtzen and Laird, 1991
Interior Alaska	Ryan Lode	total reserves	13.24	1.93	0.822	Szumigala and Hughes, 2005	at a 0.5 gpt cutoff
Southwest Alaska	Shotgun	1999	inferred resource	32.765	0.93	0.98	St George and Schneider, 1999; Freeman, C.J., 2002	at a 0.5 gpt cutoff;
Southwest Alaska	Vinasale	2004	inferred resource?	13.01	2.3	0.961	Szumigala and Hughes, 2005	at a 1.03 gpt cutoff
Interior Alaska	True North	2004	mined 2001 through 2004	10	1.37	0.44	Szumigala and Hughes, 2005
Interior Alaska	Golden Zone	2005	preliminary measured and indicated resources	2.8	2.81	0.253	Hurst, 2005	at a 1 gpt cutoff