Goldfield Main Deposit

Esmeralda County, Nevada, United States

GoldCopperLeadSilverBismuthPotassiumTinAntimony

⌖ Show on map USGS source ↗

Description

Harry Stimler & Wm Marsh

Commodities

PrimaryGold

SecondaryCopper, Lead, Silver

TertiaryBismuth, Potassium, Tin, Antimony

Commodity typeB

Deposit

Deposit typesilicified zones at shear intersections

Model154: Epithermal quartz-alunite Au

Deposit sizeY

Orebody formIrregular to tabular or knobby

Ore controlThe ore-bearing structures are generally north-south trending and sub-parallel to the strike of the ring-fracture zone.\n

Materials

Ore mineralsGold, Pyrite, Bismuthinite, Goldfieldite, Silver

GangueQuartz, Alunite, Barite, Gypsum, Limonite, Kaolin

Geology

Host rockRhyodacite,Andesite,Rhyolite

Associated rockShale,Quartzite,Limestone,Sedimentary Rock,Alkali-Granite (Alaskite),Granite,Basalt,Andesite,Dacite,Rhyolite · "El Dorado", "Siebert Fm", "Malpais Basalt"

StructureHistorically, 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 settingvolcanic center, Basin and Range

AlterationLarge envelopes of intense argillic alteration surround most of the ore zones with silicification of core ore zones.

Economic & production

Development statusProducer

Production years1904-1970s

First production1904

Last production1970

Discovery year1902

Identification

Deposit ID10310417

MRDS IDW002900

Alternate namesOne of Metallic Ventures? three area properties

RegionNA

Data scoreA

Coordinates37.71023, -117.23341

References

Ransome, F. L. 1909, Geol. and Ore Deposits of Goldfield, Nev.: USGS Prof. Paper 66, 258 p.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.Koschmann, A. H. and Bergendahl, M. H., 1968; Principal Gold Producing Districts of the United States: USGS Prof. Paper 610Spurr, J E, 1905, The Ores of Goldfield, Nev.: USGS Bull. No. 260, p. 132-139.Lincoln, F C, 1923, Mining Dist and Min. Res. Nev.: Reno, Nev. Newsletter Pub., p. 67-73Albers, J.P. and Stewart, J.H., 1972, Geology and Mineral Deposits of Esmeralda County, Nevada: NBMG Bull. 78, p. 67-69Steven 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 AreasInternet website for Metallic Ventures Inc.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.NBMG MI-80 through MI-99NBMG Map 91 1st, 2nd, 3rdMAS, 1984Amer. Mines (1990-2001)NBMG Bull 78www.romarco.comMetallic Ventures Inc., press release, 12/23/02.