Mine detail: Chukar Footwall Mine

Previously called 'ChukarGold Quarry Mine Area'

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Location

Lat / long:

40.79158, -116.20925

Resource(B)

Primary:	Gold
Secondary:	Silver
Tertiary:	Mercury, Thallium, Barium-Barite, Lead, Zinc, Copper, Manganese, Nickel, Arsenic, Antimony
Ore:	Gold, Kaolinite, Barite, Alunite, Pyrite
Gangue:	Silica
Orebody form:	tabular
Discovery year:	2001

Production

Operation type:	Underground
Deposit type:	disseminated/shear zones
Production size:	Large
Development status:	Producer
Production years:	2003-2004
First production started:	2003
Last production ended:	2004

Geology

Host rock:	Roberts Mountains Formation
Host type:	Limestone
Structure:	Decalcified, silty limestone units of the Siluro- Devonian Roberts Mountains Formation are folded into a northeast- trending anticline in the Chukar footwall deposit., The Roberts Mountains Thrust, Good Hope Fault System, Gold Quarry Fault, and other faults created a pervasive fracture system at Gold Quarry. Isoclinal folding of bedding is common.
Alteration processes:	Alteration types consist of silicification and clay alteration. At the Gold Quarry deposit, in the central Carlin trend, Heitt (1992) reported K/Ar dates ranging from 28 to 27 Ma from supergene alunite veins that crosscut and postdate gold mineralization.

References

DEP	10310452
Reference	{Deposit:: Newmont Mining Corp. First Quarter 2003 Report, 5/7/2003;}{Deposit:: Third Quarter 2003 Report, 10/29/2003}{Deposit:: J. Sagar, 2005, Geology and Mineralization at the Chukar Footwall Underground Mine, Eureka County, NV: SME Annual Meeting 2005 program}{Deposit:: NBMG MI-2001-2003}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States; Part A, Database description and analysis; part B, Digital database: U.S. Geological Survey Open-File Report 98-206, 33 p., one 3.5 inch diskette}{Deposit:: Newmont Gold website, 2004.}{Deposit:: Adella Harding 2002, Elko Daily Free Press Mining Quarterly.}{Deposit:: Johnston, Marcus. K., 2004, Wallrock alteration associated with the Chukar Footwall Carlin-type deposit, Eureka County, Nevada ;Geological Society of America Abstracts with Programs, Vol. 36, No. 4, p. 23.}
Reporter	Lapointe, D.D., Schruben, Paul G.