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Daylight-Narragansett Mines (Narragansett-Daylight Mines), Rosemont (Rosemont Camp), Helvetia-Rosemont Mining District, Pima Co., Arizona, USAi
Regional Level Types
Daylight-Narragansett Mines (Narragansett-Daylight Mines)Group of Mines
Rosemont (Rosemont Camp)- not defined -
Helvetia-Rosemont Mining DistrictMining District
Pima Co.County

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Latitude & Longitude (WGS84):
31° 50' 44'' North , 110° 45' 32'' West
Latitude & Longitude (decimal):
Locality type:
Group of Mines
Nearest Settlements:
Corona de Tucson5,675 (2011)13.4km
East Sahuarita1,622 (2006)19.3km
Sonoita818 (2015)20.8km
Green Valley21,391 (2011)22.2km
Sahuarita25,707 (2017)22.4km

‡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.

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).

USGS Sahuarita Quadrangle topo map.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10184447, MRDS ID #M050046, MAS ID #0040190192.

A former underground Cu-Ag-Zn-Pb-Au mine group located in the SE ¼ sec. 24 & the NE ¼ sec. 25, T.18S., R.15E., on private (patented) land. First produced 1870. Owned/operated at times, or in part, by the Lewisohn Copper Co.; Brown; Ramsdell; Narragansett Mines Co.; Holderness; Steinfeld & Co.; Bennett; and the Wilson Mining Co. (1961). Mine workings underlie the Narragansett, Daylight, Triangle, and York Patented claims, all of which are part of the Helvetia property owned by ASARCO (1992).

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.

Workings include tunnels and shafts. Averaged 7.01% Cu. Yielded 13,248 tons (1,611,429 lbs.) Cu (1917). 1870-1961 Average 4% Cu, 0.5 Oz/ton Ag 90000 tons.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

5 valid minerals.

Detailed Mineral List:

Formula: Cu3(CO3)2(OH)2
Reference: MRDS database Dep. ID file #10039412, MRDS ID #M050046.
Formula: Cu2S
Formula: CuFeS2
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Creasey, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia Mining district, Pima Co., AZ, USGS Bull. 1027-F: 318-319.
Formula: Cu2(CO3)(OH)2
Formula: FeS2

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 5 - Nitrates and Carbonates
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
AmBnXp, with (m+n):p = 1:1
AmBnXp, with (m+n):p = 1:2
Unclassified Minerals, Mixtures, etc.
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

H MalachiteCu2(CO3)(OH)2
H AzuriteCu3(CO3)2(OH)2
C MalachiteCu2(CO3)(OH)2
C AzuriteCu3(CO3)2(OH)2
O Garnet GroupX3Z2(SiO4)3
O MalachiteCu2(CO3)(OH)2
O AzuriteCu3(CO3)2(OH)2
Si Garnet GroupX3Z2(SiO4)3
S ChalcopyriteCuFeS2
S PyriteFeS2
S ChalcociteCu2S
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu MalachiteCu2(CO3)(OH)2
Cu AzuriteCu3(CO3)2(OH)2
USGS MRDS Record:10184447

Localities in this Region

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North America
North America PlateTectonic Plate

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