Mine detail: Delamar Mine

Previously called 'Lucky Bar ClaimJim Crow ClaimMonitor ClaimMonitor No. 2 ClaimHog Pen ClaimGold Cup Claim'

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Location

Lat / long: 37.45969, -114.76667

Resource(M)

Primary: Gold, Silver
Tertiary: Copper, Iron
Ore: Gold, Tetrahedrite, Chalcopyrite, Bornite, Chalcocite, Malachite, Chrysocolla
Gangue: Pyrite, Quartz
Orebody form: tabular
Discovery year: 1891

Production

Operation type: Surface-Underground
Deposit type: vein; breccia filling
Production size: Large
Development status: Producer
First production started: 1890
Last production ended: 1930

Geology

Host rock:Prospect Mountain Quartzite
Host type:Quartzite,Limestone,Volcanic Breccia (Agglomerate)
Associated rock:Caliente caldera complex
Associated type:Rhyolite,Basalt
Structure:The dominant structural feature in the region is the Caliente caldera complex, an east-elongated (50X22 mi; 80X35 km) complex of inset calderas in Nevada and Utah. It spans an age of at least 10 million years (23-13 Ma), an unusually long activity period for a caldera complex. It is bounded on its northern and southern sides by transverse zones, which are east-striking late Mesozoic to Cenozoic structures that cross the Great Basin and accommodate different amounts, types, and rates of crustal extension to the north and south. The Caliente complex was highly extended along transverse zones and faults that were synchronous with caldera magmatism. One of these is the Timpahute transverse zone, along the northern side of the caldera complex., Rocks in the Delamar District are cut by abundant normal faults.
Tectonic:Deposition of the Palezoic strata of the southern Delamar Mountains occurred about midway between the eastern and western margins of the Cordilleran miogeocline.

References

DEP10310400
Reference{Deposit:: Callaghan, E., 1937, Geology of the Delmar District, Lincoln Co, Nev. Nevada Bur. of Mines vol . 31, no. 5, p. 50-58.}{Deposit:: Tschanz, C.M. and Pampeyan, .H., 1970, Geology and Mineral Deposits of Lincoln Co. Nev. Nev. Bur. Mines Bull. 73, p. 141.}{Deposit:: Emmons, S F, 1901, The Delamar and Hornsilver Mines: 2 Types of Ore Deposits in Utah and Nevada: AIME Trans, vol 31, p. 658-683.}{Deposit:: Lincoln, F. C., 1923, Mining Districts and Mineral Resources of Nevada: Nevada Newsletter Pub Co; Reno, NV.}{Deposit:: Smith, A.M. and Carpenter, J., 1931, Notes on Inspection Trip; NBMG Mining District File 167, item 3.}{Deposit:: NBMG Mining District File 167, items 6 and 7, Potential National Historical Register Site Report.}{Deposit:: Godbe, W.S., 1894, Eng. & Min. Jour., vol. 57, p. 106.}{Deposit:: Bentz, J.and Smith, P., 1983, NBMG Field Examination Report, Sept 30,1983.}{Deposit:: Barton, Harlan N. and Day, Gordon W. 1984, Reconnaissance geochemistry of the Delamar Mountains; Bureau of Land Management Wilderness Study Area (NV 050-0177), Lincoln County, Nevada. U. S. Geological Survey, Open-File Report OF 84-0360, 49 pp.}{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:: Rowley, Peter D. and others, 2001, Field trip to the Caliente Caldera Complex, east-striking transverse zones, and nearby mining districts in Nevada-Utah; implications for petroleum, ground-water, and mineral resources; in The geologic transition, high plateaus to Great Basin; a symposium and field guide; the Mackin volume, editor, Erskine, M. C. and others Guidebook - Pacific Section, American Association of Petroleum Geologists, vol.78, pp.401-418, 2001.}{Deposit:: Beta Minerals website: www.betaminerals.com}{Deposit:: Snee, Lawrence W. and Rowley, Peter D. , 2000, New 40Ar/39Ar dates from the Caliente caldera complex, Nevada-Utah; at least 10 million years of Tertiary volcanism in one of the worl* largest caldera complexes; Abstracts with Programs - Geological Society of America, vol.32, no.7, pp.461.}
ReporterLaPointe, D. D. , Schruben, Paul G.