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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
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
31° 50' 44'' North , 110° 45' 32'' West
Latitude & Longitude (decimal):
Locality type:
Group of Mines
Nearest Settlements:
PlacePopulationDistance
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:

Azurite
Formula: Cu3(CO3)2(OH)2
Reference: MRDS database Dep. ID file #10039412, MRDS ID #M050046.
Chalcocite
Formula: Cu2S
Chalcopyrite
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.
Malachite
Formula: Cu2(CO3)(OH)2
Pyrite
Formula: FeS2

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Malachite5.BA.10Cu2(CO3)(OH)2
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
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Unclassified Minerals, Mixtures, etc.
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H AzuriteCu3(CO3)2(OH)2
CCarbon
C MalachiteCu2(CO3)(OH)2
C AzuriteCu3(CO3)2(OH)2
OOxygen
O Garnet GroupX3Z2(SiO4)3
O MalachiteCu2(CO3)(OH)2
O AzuriteCu3(CO3)2(OH)2
SiSilicon
Si Garnet GroupX3Z2(SiO4)3
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
S ChalcociteCu2S
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu MalachiteCu2(CO3)(OH)2
Cu AzuriteCu3(CO3)2(OH)2
USGS MRDS Record:10184447

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