Isle Royal Mine, Isle Royal Mine group, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USAi
Regional Level Types | |
---|---|
Isle Royal Mine | Mine |
Isle Royal Mine group | - not defined - |
Helvetia | Town (Former) |
Helvetia-Rosemont Mining District | Mining District |
Pima County | County |
Arizona | State |
USA | Country |
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Latitude & Longitude (WGS84):
31° 51' 28'' North , 110° 46' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Corona de Tucson | 5,675 (2011) | 12.0km |
East Sahuarita | 1,622 (2006) | 17.9km |
Sahuarita | 25,707 (2017) | 21.0km |
Green Valley | 21,391 (2011) | 21.4km |
Vail | 10,208 (2011) | 21.8km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
Club | Location | Distance |
---|---|---|
Old Pueblo Lapidary Club | Tucson, Arizona | 43km |
Tucson Gem and Mineral Society | Tucson, Arizona | 43km |
Mindat Locality ID:
50679
Long-form identifier:
mindat:1:2:50679:2
GUID (UUID V4):
61464e3c-ba40-4ba1-975f-77e25f5f0b74
Other/historical names associated with this locality:
Isle Royale Mine; Indian Club & Isle Royal claims
‡Ref.: Schrader, F.C. and J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 92, 108-110.
Creasey, S.C. & G.L. Quick (1955), Copper deposits of part of Helvetia mining district, Pima County, Arizona, USGS Bull. 1027-F: 301-323.
Arizona Bureau of Mines field notes (1971), vol. 1, no. 2.
Drewes, H.D. (1971) Geologic map of the Sahuarita quadrangle, southeast of Tucson, Pima County, Arizona: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-613, 1 sheet, scale 1:48,000.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 402.
USGS Sahuarita Quadrangle topo map.
MRDS database Dep. ID file #10039411, MRDS ID #M050044; and, Dep. ID #10186471, MAS ID #0040190272.
A former small surface and underground Cu-Ag-Au-Mo-W mine located in the SE¼NW¼ sec. 24, T18S, R15E, 1¼ miles east of Helvetia and 1,000 feet south of the Copper World Mine, and 28 miles SE of Tucson. It is near the axis of the range, in the north slope of the spur of Monument Mountain. Discovered by C.E. Hughes in the early 1880's (1882 ?). Development work commenced in 1904. Closed 1905. Reopened about 1908 and worked until ore became too lean. The Isle Royal Mine underlies the Copper Fend, Copper World and the Owosko patented claims, all of which are part of the Helvetia property owned by ASARCO (1992).
Mineralization is a pipe-like ore body hosted in Escabrosa Limestone, Horquilla Limestone; Abrigo Formation; and, Bolsa Quartzite. Located on a contact between Paleozoic limestone and Mesozoic granite, near a fault. An associated rock unit is the Continental Granodiorite. The contact dips 68ºN. The alaskite aplite dike of the Copper World Mine lies nearby on the east and probably exerted a favorable influence on the ore deposition, as may have also the stock of granite porphyry not far distant. Ore control was altered limestone along the fault. Alteration was oxidation down to the 330 foot level; also, pyrite-chalcopyrite-gossan and skarn. Malachite and azurite found in supergene zone, secondary after pyrite and chalcopyrite.
The oxidized zone extends from the surface to the 330 foot level. The ore here includes a large chimney-like body extending from the 100 foot to the 300 foot levels. This ore is all copper carbonates (malachite and azurite), and is contained in relatively firm limestone.
Good copper sulfide ore, consisting principally of cupriferous pyrite and chalcopyrite, was encountered in moderate-sized bodies on the 400 level and continued down to the 600 level, below which it reported pinched out.
Local structures include a NW-striking thrust and normal faulting, homoclinal. Regional trends include tilting and broad open folds in the south and extensive faulting in the north.
Workings include an old shaft sunk to the first level in 1904. An 800-foot, double-compartment vertical main shaft and about 4,000 feet of work on 7 levels were subsequently developed. Deepest mine in the area at 243.84 meters. Workings underlie the Little Dave.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
ⓘ Azurite Formula: Cu3(CO3)2(OH)2 |
ⓘ Chalcocite Formula: Cu2S |
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
ⓘ Molybdenite Formula: MoS2 |
ⓘ Powellite Formula: Ca(MoO4) |
ⓘ Pyrite Formula: FeS2 |
ⓘ Pyrite var. Copper-bearing Pyrite Formula: (Fe,Cu)S2 |
ⓘ Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 Description: Occurs in contact-metamorphosed rocks. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcocite | 2.BA.05 | Cu2S |
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Molybdenite | 2.EA.30 | MoS2 |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
ⓘ | var. Copper-bearing Pyrite | 2.EB.05a | (Fe,Cu)S2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
ⓘ | Powellite | 7.GA.05 | Ca(MoO4) |
Group 9 - Silicates | |||
ⓘ | Tremolite | 9.DE.10 | ◻Ca2Mg5(Si8O22)(OH)2 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
H | ⓘ Malachite | Cu2(CO3)(OH)2 |
H | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
C | Carbon | |
C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
C | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
O | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | ⓘ Powellite | Ca(MoO4) |
O | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Mg | Magnesium | |
Mg | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Si | Silicon | |
Si | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Chalcocite | Cu2S |
S | ⓘ Molybdenite | MoS2 |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Pyrite var. Copper-bearing Pyrite | (Fe,Cu)S2 |
Ca | Calcium | |
Ca | ⓘ Powellite | Ca(MoO4) |
Ca | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Pyrite | FeS2 |
Fe | ⓘ Pyrite var. Copper-bearing Pyrite | (Fe,Cu)S2 |
Cu | Copper | |
Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Cu | ⓘ Chalcocite | Cu2S |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Cu | ⓘ Pyrite var. Copper-bearing Pyrite | (Fe,Cu)S2 |
Mo | Molybdenum | |
Mo | ⓘ Molybdenite | MoS2 |
Mo | ⓘ Powellite | Ca(MoO4) |
Other Databases
Link to USGS MRDS: | 10039411 |
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Other Regions, Features and Areas containing this locality
Mexico
- Sierra Madre OccidentalMountain Range
North America
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
USA
- Arizona
- Santa Rita MountainsMountain Range
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Isle Royal Mine, Isle Royal Mine group, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA