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Tres de Mayo Mine group, Fresno Canyon, Palmetto Mining District, Patagonia Mts, Santa Cruz Co., Arizona, USAi
Regional Level Types
Tres de Mayo Mine group- not defined -
Fresno CanyonCanyon
Palmetto Mining DistrictMining District
Patagonia MtsMountain Range
Santa Cruz Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
31° 26' 44'' North , 110° 48' 5'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Kino Springs136 (2011)9.2km
Beyerville177 (2011)9.5km
Patagonia890 (2017)11.3km
Rio Rico18,962 (2011)16.8km
Nogales20,252 (2017)17.2km


‡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: 290.

Moger, S.R. (1969) University of Arizona, M.S. thesis, 60 p.

Simons, F.S. (1974) Geologic map and sections of the Nogales and Lochiel quadrangles, Santa Cruz County, Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-762, 9 p., 1 sheet, scale 1:48,000.

Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4).

U.S. Bureau of Mines field notes Pb14.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10102403, MRDS ID #M000429; and, Dep. ID #10113534, MAS ID #0040230388.

A former small underground Cu-Ag-Au-Pb-Zn-Mn-Mo-V mine group located in the SW¼SW¼ sec. 3 & the N½ sec. 10, T.23S., R.15E, on the S side of Fresno Canyon, 1 mile NE of the Jarillas Mine group, about 10 miles NE of Patagonia, and 2 miles NE of Nogales International Airport, on National Forest land. There were 7 unpatented claims in 1958 (27 unpatented claims in 1923). Discovered in 1880 by A.J. Stockton and Associates. Owned/operated at times, or in part, by Stockton; Peck and Salmando ( 1910); Backman & Merritt Mines Co. (1918-1920); Monarch Mining & Milling Co. (1922); Taft Mining & Exploration Co. (1928); Melville Syndicate (1929-1930); Hunter (1923); Newcomer (1938-1941); and, Cummings (1942). Owned by Arthur Peck and Frank Otero (1975). Operated by the General Development And Mining Co. Tres De Mayo Mine); Frank Otero And Rupert Beyerle (1958).

Mineralization is lenses of argentiferous galena with minor chalcopyrite and sphalerite in a quartz, psilomelane, and gouge gangue in fissure-zone veins, oxidized to cerussite, acanthite, and rich chlorargyrite pockets. Narrow bands of Mn are found within the Tres De Mayo vein and in adjacent wall rock. The wall rock is strongly sheared and fractured Precambrian rock intruded by Jurassic granite. A major fault passes through the area and a Northeast-striking fracture zone contains weak, oxidized sulfide mineralization. Psilomelane often contains lead and silver values. Surface oxidation to 90 feet of depth. Diorite near the contact is both chloritized and epidotized. An associated rock unit is the Comoro Canyon Granite.

The deposits occur mainly in 2 veins about 300 feet apart. A 4 foot wide Mn vein also occurs on the property. The 20 foot wide fault zone that strikes N-S & dips steeply W intersects the Tres De Mayo vein about 600 feet NW of the Tres De Mayo shaft. Numerous minor fissures striking N30-65W occur between the fault and vein.

Workings include shaft operations to a depth of 165.2 meters. Workings include the 542 foot deep vertical Tres De Mayo shaft and several levels. The 4th level has a total of 420 feet of drifts and crosscuts. Worked by Mexicans prior to 1880 but mainly from 1910 through 1942, producing in total some 200 tons of ore averaging about 70 oz. Ag/T, 25% Pb and minor Cu & Au.

Regions containing this locality

North America PlateTectonic Plate
Sonoran Desert, North AmericaDesert

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

13 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
Brackebuschite
Formula: Pb2Mn3+(VO4)2(OH)
Habit: Micro-crystals
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 144.
Calderónite
Formula: Pb2Fe3+(VO4)2(OH)
Colour: Red-brown
Description: Calderonite was first listed as Brackebuschite but testing at the University of Arizona showed them to be Calderonite.
Reference: Rolf Luetcke
Cerussite
Formula: PbCO3
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
Chalcopyrite
Formula: CuFeS2
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
Chlorargyrite
Formula: AgCl
Description: In rich pockets.
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
'Chlorite Group'
Description: An alteration product of country rocks near contacts.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, AZ, USGS Bull. 582: 290.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Description: An alteration product of country rocks near contacts.
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, AZ, USGS Bull. 582: 290.
Galena
Formula: PbS
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
Galena var: Argentiferous Galena
Formula: PbS
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, AZ, USGS Bull. 582: 290.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: MRDS database Dep. ID file #10102403, MRDS ID #M000429.
Nsutite
Formula: (Mn4+,Mn2+)(O,OH)2
Reference: Rolf Luetcke
'Psilomelane'
Formula: Mn, O
Description: Has Pb & Ag values.
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
Sphalerite
Formula: ZnS
Reference: Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 74 (Table 4); Schrader (1915): 290; Arizona Bureau of Mines file data.
Vanadinite
Formula: Pb5(VO4)3Cl
Reference: C. Lemanski, Jr. collection (6911CL).
Wulfenite
Formula: Pb(MoO4)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
var: Argentiferous Galena2.CD.10PbS
Sphalerite2.CB.05aZnS
Group 3 - Halides
Chlorargyrite3.AA.15AgCl
Group 4 - Oxides and Hydroxides
Nsutite4.DB.15c(Mn4+,Mn2+)(O,OH)2
Group 5 - Nitrates and Carbonates
Cerussite5.AB.15PbCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Wulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Brackebuschite8.BG.05Pb2Mn3+(VO4)2(OH)
Calderónite8.BG.05Pb2Fe3+(VO4)2(OH)
Vanadinite8.BN.05Pb5(VO4)3Cl
Group 9 - Silicates
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-Mn, O

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 4 - SIMPLE OXIDES
AX2
Nsutite4.4.8.1(Mn4+,Mn2+)(O,OH)2
Group 9 - NORMAL HALIDES
AX
Chlorargyrite9.1.4.1AgCl
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Cerussite14.1.3.4PbCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O
Brackebuschite40.2.8.1Pb2Mn3+(VO4)2(OH)
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Vanadinite41.8.4.3Pb5(VO4)3Cl
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite48.1.3.1Pb(MoO4)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Mixtures, etc.
Calderónite-Pb2Fe3+(VO4)2(OH)
'Chlorite Group'-
Galena
var: Argentiferous Galena
-PbS
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-Mn, O

List of minerals for each chemical element

HHydrogen
H BrackebuschitePb2Mn3+(VO4)2(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Limonite(Fe,O,OH,H2O)
H Nsutite(Mn4+,Mn2+)(O,OH)2
H MalachiteCu2(CO3)(OH)2
H CalderónitePb2Fe3+(VO4)2(OH)
CCarbon
C CerussitePbCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O VanadinitePb5(VO4)3Cl
O PsilomelaneMn, O
O CerussitePbCO3
O BrackebuschitePb2Mn3+(VO4)2(OH)
O WulfenitePb(MoO4)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Limonite(Fe,O,OH,H2O)
O Nsutite(Mn4+,Mn2+)(O,OH)2
O MalachiteCu2(CO3)(OH)2
O CalderónitePb2Fe3+(VO4)2(OH)
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
SiSilicon
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
SSulfur
S Galena (var: Argentiferous Galena)PbS
S ChalcopyriteCuFeS2
S SphaleriteZnS
S AcanthiteAg2S
S GalenaPbS
ClChlorine
Cl VanadinitePb5(VO4)3Cl
Cl ChlorargyriteAgCl
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
VVanadium
V VanadinitePb5(VO4)3Cl
V BrackebuschitePb2Mn3+(VO4)2(OH)
V CalderónitePb2Fe3+(VO4)2(OH)
MnManganese
Mn PsilomelaneMn, O
Mn BrackebuschitePb2Mn3+(VO4)2(OH)
Mn Nsutite(Mn4+,Mn2+)(O,OH)2
FeIron
Fe ChalcopyriteCuFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Limonite(Fe,O,OH,H2O)
Fe CalderónitePb2Fe3+(VO4)2(OH)
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
MoMolybdenum
Mo WulfenitePb(MoO4)
AgSilver
Ag AcanthiteAg2S
Ag ChlorargyriteAgCl
PbLead
Pb VanadinitePb5(VO4)3Cl
Pb Galena (var: Argentiferous Galena)PbS
Pb CerussitePbCO3
Pb BrackebuschitePb2Mn3+(VO4)2(OH)
Pb WulfenitePb(MoO4)
Pb CalderónitePb2Fe3+(VO4)2(OH)
Pb GalenaPbS
USGS MRDS Record:10102403

Localities in this Region


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