Mine detail: Goldfield Main Deposit

Previously called 'One of Metallic Ventures? three area properties'

<< Back to the map

Location

Lat / long: 37.71023, -117.23341

Resource(B)

Primary: Gold
Secondary: Copper, Lead, Silver
Tertiary: Bismuth, Potassium, Tin, Antimony
Ore: Gold, Pyrite, Bismuthinite, Goldfieldite, Silver
Gangue: Quartz, Alunite, Barite, Gypsum, Limonite, Kaolin
Orebody form: Irregular to tabular or knobby
Discovery year: 1902

Production

Operation type: Surface-Underground
Deposit type: silicified zones at shear intersections
Production size: Yes
Development status: Producer
Production years: 1904-1970s
First production started: 1904
Last production ended: 1970

Geology

Host type:Rhyodacite,Andesite,Rhyolite
Associated rock:El Dorado, Siebert Fm, Malpais Basalt
Associated type:Shale,Quartzite,Limestone,Sedimentary Rock,Alkali-Granite (Alaskite),Granite,Basalt,Andesite,Dacite,Rhyolite
Structure:Historically, ore is localized along the N-S-trending Columbia Mt. Fault, at intersections with left lateral E-W-trending offset faults (800-900 ft offset)., Tertiary deposits are domed and faulted by steeply dipping post Miocene: N-S and E-W faults.
Tectonic:volcanic center, Basin and Range
Alteration processes:Large envelopes of intense argillic alteration surround most of the ore zones with silicification of core ore zones.

References

MRDSW002900
DEP10310417
Reference{Deposit:: Ransome, F. L. 1909, Geol. and Ore Deposits of Goldfield, Nev.: USGS Prof. Paper 66, 258 p.}{Deposit:: Searls, F. Jr., 1948, Geol and Ore Deposits of Goldfield, Nev.: Nevada Univ. Bull., v.42, no. 5, Geology and Mining Ser. 48, 24 p.}{Deposit:: Koschmann, A. H. and Bergendahl, M. H., 1968; Principal Gold Producing Districts of the United States: USGS Prof. Paper 610}{Deposit:: Spurr, J E, 1905, The Ores of Goldfield, Nev.: USGS Bull. No. 260, p. 132-139.}{Deposit:: Lincoln, F C, 1923, Mining Dist and Min. Res. Nev.: Reno, Nev. Newsletter Pub., p. 67-73}{Deposit:: Albers, J.P. and Stewart, J.H., 1972, Geology and Mineral Deposits of Esmeralda County, Nevada: NBMG Bull. 78, p. 67-69}{Deposit:: Steven Ristorcelli, Scott Hardy, and Neil Prenn, 2003, Geology and Mineralization of the Goldfield Area, Esmeralda,County, Nevada; Geological Society of Nevada Special Publication No. 37: Spring 2003 Field Trip Guidebook Gold Deposits of the Goldfield, Midway and Thunder Mountain Areas}{Deposit:: Internet website for Metallic Ventures Inc.}{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:: NBMG MI-80 through MI-99}{Deposit:: NBMG Map 91 1st, 2nd, 3rd}{Deposit:: MAS, 1984}{Deposit:: Amer. Mines (1990-2001)}{Deposit:: NBMG Bull 78}{Deposit:: www.romarco.com}{Deposit:: Metallic Ventures Inc., press release, 12/23/02.}
ReporterLaPointe, D. D., Schruben, Paul G.