Mine detail: Neglected Mine

Previously called 'Over Sight, MS 15974Monument, MS 15974Bunker Hill, MS 15974Silver Night, MS 15974Little Johney, MS 15974Elkton, MS 15974Maid of Erin, MS 15974Patented Claims: Mountain View, MS 15973Neglected, MS 15974Sunnyside, MS 15974Legal Tender, MS 15974'

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Location

Lat / long:

37.43668, -107.94592

Resource(M)

Primary:	Gold, Silver
Tertiary:	Copper, Mercury, Tellurium, Antimony
Ore:	Argentite, Bornite, Chalcopyrite, Coloradoite, Covellite, Enargite, Krennerite, Petzite, Sylvanite
Gangue:	Ankerite, Barite, Chlorite, Dickite, Epidote, Halloysite, Limonite, Quartz, Tourmaline
Discovery year:	1895

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Past Producer
First production started:	1901
Last production ended:	1949

Geology

Host rock:	Cutler Formation
Host type:	Diorite,Shale
Associated rock:	Porphyritic Rocks--Diorite-Monzonite Porphyry
Associated type:	Diorite
Structure:	San Juan Uplift, Four Corners Platform, La Plata Dome
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Wall Rock Strongly Altered Near Dike. Shale And Porphyry Groundmass Bleached And Silicified 2 To 10 Ft From Fracture Zones. Feldspars In Porphyry And Arkose Altered To Sericite And Halloysite; Hornblende Altered To Chlorite, Epidote, And Carbonate In Partly Altered Porphyry, But In More Thoroughly Altered Rock Closer To Vein Consists Of Intergrown Tourmaline, Sericite, And Chlorite With Disseminated Pyrite.

References

MRDS	D010845
DEP	10014182
Reference	{Deposit:: ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 73-76, 156-158}{Deposit:: EMMONS. W.H., 1905, THE NEGLECTED MINE AND NEAR-BY PROPERTIES, DURANGO QUADRANGLE, COLORADO: USGS BULL. 260, P. 121-127.}{Deposit:: BRECKON, L.S., 1934, REPORT ON THE COLORADO-JUNEAU MINES, INC., ORO FINO MINING DISTRICT, LA PLATA COUNTY, SOUTHWESTERN COLORADO: UNPUB. ENG. REPT., 14 P.}{Deposit:: EVANS, W.S., (NO DATE), REPORT ON THE NEGLECTED MINES, LA PLATA COUNTY: UNPUB. ENG. REPT., 5 P.}{Deposit:: COLORADO DIV. MINES INF. REPTS.}{Deposit:: BLM MINERAL SURVEYS MS 15973, 15974}{Deposit:: ORT, J.C., 1933, REPORT OF TESTS CONDUCTED ON SAMPLE OF ORE FROM COLORADO-JUNEAU MINES, INC.: UNPUB. REPT., 4 P.}{Production:: ECKEL AND OTHERS, 1949, P. 156 (AS COMPILED FROM USGS AND USBM RECORDS); BRECKON (1934); COLO. DIV. MINES ANNUAL OPERATOR REPTS.}
Reporter	Schwochow, Stephen D.