AragoniteDaylight Mine, Daylight-Narragansett Mines, Rosemont, Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona, USA
Photo: Dan Weinrich Latitude: 31°50'41"N
Longitude: 110°45'19"W
‡Ref.: Schrader, F.C. (1915) Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, with contributions by J.M. Hill: U.S. Geological Survey Bulletin 582, 373 p., 3 sheets, scale 1:125,000: 128-129.
Creasey, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima County, Arizona, USGS Bull. 1027-F: 318, 319.
Cornwall, H.R. (1973) Field Examination, Daylight Mine.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 125 (Table 4).
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10039632, MRDS ID #M050535.
A former small underground Cu-Ag-Zn-Pb-Au mine located on the Daylight claim which adjoins the Narragansett claim and the York claim, in the SE ¼ sec. 24 & the NE ¼ sec. 25, T.18S., R.15E., 2 miles SE of Helvetia. The Narragansett Mine is immediately adjacent. Produced 1943-1951. Owned at times, or in part, by the Lewisohn Copper Co.; Brown; Ramsdell; Narragansett Mines Co.; Holderness; Steinfeld & Co.; Fred A. Bennett (operator); and the Wilson Mining Co.
Mineralization is copper carbonates with minor sulfides and local areas of lead and zinc minerals in irregular, pyrometasomatic replacement orebodies in intensely silicated and crushed Paleozoic limestone along folded series of thrust-faulted block segments. Alteration included pyrite-chalcopyrite-gossan.
Local structures include a folded sequence of thrust-faulted limestone block segments.
Workings include tunnels and shafts. This mine produced mainly from 1943 to 1951. It produced some 4,000 tons of ore averaging about 5% Cu, 5% Zn, 3% Pb and 1 oz. Ag/T.
Mineral List
4 entries listed. 4 valid minerals.
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