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Robert E. Lee Mine (Bob Lee Mine; Bob Lee and Widow Mine), Tres de Mayo Mine group, Palmetto District, Fresno Canyon, Patagonia Mts, Santa Cruz Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 26' 58'' North , 110° 48' 9'' West
Latitude & Longitude (decimal): 31.44944,-110.80250
GeoHash:G#: 9t94ythn6
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


A Cu-Ag-Au-Pb-Zn-Mn-Mo-V mine located in the SW ¼ sec. 3 & the N ½ sec. 10, T23S, R15E, at 4,292 feet of altitude. Owned at times, or in part, by Stockton; Backman & Merritt Mines Co.; Monarch Mining & Milling Co.; Taft Mining & Exploration Co.; Melville Syndicate; Newcomer; and, Cummings. Coordinates updated February, 2008, using a hand held Garmin GPS unit (at the adit portal) by Ronald Deblois.

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. 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.

Workings include an adit at the bottom of a wash. There are no additional workings to surface. The adit proceeds straight in about 100 feet (30 meters), then spreads out into several additional tunnels trending in the same general direction. The low, narrow, arched adit is evidence of the fact that it was opened up and 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.

CAUTION: This mine was found to contain a skunk, wild pig droppings and a resident rattlesnake (2008).

Regions containing this locality

Sonoran Desert, North America

Desert - 1,138 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


12 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Rolf Luetcke
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Eckhard D. Stuart
Descloizite
Formula: PbZn(VO4)(OH)
Reference: Rolf Luetcke
Galena
Formula: PbS
Reference: Eckhard D. Stuart
Hematite
Formula: Fe2O3
Reference: Rolf Luetcke
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Rolf Luetcke
Mimetite
Formula: Pb5(AsO4)3Cl
Reference: Rolf Luetcke
Phosphohedyphane
Formula: Ca2Pb3(PO4)3Cl
Reference: Rolf Luetcke
'Psilomelane'
Reference: Rolf Luetcke
Pyrolusite
Formula: Mn4+O2
Reference: Rolf Luetcke
Pyromorphite
Formula: Pb5(PO4)3Cl
Reference: Rolf Luetcke
Quartz
Formula: SiO2
Reference: Eckhard D. Stuart
Quartz var: Rock Crystal
Formula: SiO2
Reference: Eckhard D. Stuart
Vanadinite
Formula: Pb5(VO4)3Cl
Reference: Self-collected by C. Lemanski, Jr. - sight identification.
'Wad'
Reference: Self-collected by C. Lemanski, Jr. - sight identification.
Wulfenite
Formula: Pb(MoO4)
Reference: Self-collected by C. Lemanski, Jr. - sight identification.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Galena'2.CD.10PbS
Group 4 - Oxides and Hydroxides
'Hematite'4.CB.05Fe2O3
'Pyrolusite'4.DB.05Mn4+O2
'Quartz'4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anglesite'7.AD.35PbSO4
Wulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
'Descloizite'8.BH.40PbZn(VO4)(OH)
'Mimetite'8.BN.05Pb5(AsO4)3Cl
'Phosphohedyphane'8.BN.05Ca2Pb3(PO4)3Cl
'Pyromorphite'8.BN.05Pb5(PO4)3Cl
Vanadinite8.BN.05Pb5(VO4)3Cl
Group 9 - Silicates
'Chrysocolla'9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-
Wad-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Descloizite41.5.2.1PbZn(VO4)(OH)
A5(XO4)3Zq
Mimetite41.8.4.2Pb5(AsO4)3Cl
Pyromorphite41.8.4.1Pb5(PO4)3Cl
Vanadinite41.8.4.3Pb5(VO4)3Cl
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite48.1.3.1Pb(MoO4)
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
Phosphohedyphane-Ca2Pb3(PO4)3Cl
'Psilomelane'-
Quartz
var: Rock Crystal
-SiO2
'Wad'-

List of minerals for each chemical element

HHydrogen
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H DescloizitePbZn(VO4)(OH)
H Limonite(Fe,O,OH,H2O)
OOxygen
O AnglesitePbSO4
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O DescloizitePbZn(VO4)(OH)
O HematiteFe2O3
O Limonite(Fe,O,OH,H2O)
O MimetitePb5(AsO4)3Cl
O PhosphohedyphaneCa2Pb3(PO4)3Cl
O PyrolusiteMn4+O2
O PyromorphitePb5(PO4)3Cl
O QuartzSiO2
O Quartz (var: Rock Crystal)SiO2
O VanadinitePb5(VO4)3Cl
O WulfenitePb(MoO4)
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
SiSilicon
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si QuartzSiO2
Si Quartz (var: Rock Crystal)SiO2
PPhosphorus
P PhosphohedyphaneCa2Pb3(PO4)3Cl
P PyromorphitePb5(PO4)3Cl
SSulfur
S AnglesitePbSO4
S GalenaPbS
ClChlorine
Cl MimetitePb5(AsO4)3Cl
Cl PhosphohedyphaneCa2Pb3(PO4)3Cl
Cl PyromorphitePb5(PO4)3Cl
Cl VanadinitePb5(VO4)3Cl
CaCalcium
Ca PhosphohedyphaneCa2Pb3(PO4)3Cl
VVanadium
V DescloizitePbZn(VO4)(OH)
V VanadinitePb5(VO4)3Cl
MnManganese
Mn PyrolusiteMn4+O2
FeIron
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
CuCopper
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
ZnZinc
Zn DescloizitePbZn(VO4)(OH)
AsArsenic
As MimetitePb5(AsO4)3Cl
MoMolybdenum
Mo WulfenitePb(MoO4)
PbLead
Pb AnglesitePbSO4
Pb DescloizitePbZn(VO4)(OH)
Pb GalenaPbS
Pb MimetitePb5(AsO4)3Cl
Pb PhosphohedyphaneCa2Pb3(PO4)3Cl
Pb PyromorphitePb5(PO4)3Cl
Pb VanadinitePb5(VO4)3Cl
Pb WulfenitePb(MoO4)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Cretaceous
66 - 145 Ma



ID: 3187054
Mesozoic sedimentary rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Calymmian
1400 - 1600 Ma



ID: 2932729
Middle Proterozoic granitic rocks

Age: Calymmian (1400 - 1600 Ma)

Stratigraphic Name: Oracle Granite; Ruin Granite

Description: Mostly porphyritic biotite granite with large microcline phenocrysts, with local fine-grained border phases and aplite. Associated pegmatite and quartz veins are rare. This unit forms large plutons, including the Oracle Granite, Ruin Granite, granite in the Pinnacle Peak - Carefree area northeast of Phoenix, and several bodies west of Prescott. (1400-1450 Ma)

Comments: ~ 1.4 Ga Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.

Lithology: Major:{granite}, Minor:{aplite}, Incidental:{pegmatite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
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.
Flagg, A.L. (1942), Vanadium Reports, Book IV, Arizona Department of Mineral Resources.
Moger, S.R. (1969) Geology of the west central portion of the Patagonia Mountains, Santa Cruz County, Arizona: Davis, University of California, M.S. thesis, 60 p. [year also erroneously given as 1970]
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 Coronado National Forest Study.
Arizona Bureau of Mines file data.


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