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Weldon Mine, Ben Nevis Mountain, Quijotoa District, Quijotoa Mts, Tohono O'odom (Papago) Indian Reservation, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 32° 3' 48'' North , 112° 9' 0'' West
Latitude & Longitude (decimal): 32.06333,-112.15000
GeoHash:G#: 9t8nruyy7
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate


A former small underground Au-Ag-Pb-Cu-Zn mine located in East-central sec. 3, T16S, R2E, G&SRM (protracted), 7 miles SW of the Quijotoa Trading Post. Produced 1890-1910. Owned by the Weldon Gold & Copper Co.

Mineralization is spotty free gold and silver chlorides with minor, largely oxidized, base metal sulfides in pockety lenses of quartz, hematite, manganese oxides, breccia, and gouge along a fault contact zone between Laramide andesitic volcanics and a granitic intrusion.

Workings include shaft and tunnel operations. prospected and worked intermittently since the 1880's to the early 1900's. Estimated production could be some 2,500 tons of ore containing about 1 oz./ton each of Au & Ag and minor Cu & Pb.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Weldon Mine Pima Co. AZ

Regions containing this locality

Sonoran Desert, North America

Desert - 1,135 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Rolf Luetcke
Baryte
Formula: BaSO4
Habit: Rosette-shaped aggregates to 15 cm
Colour: Pink
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 128; Shannon, D.M. (1981), What's new in minerals, Min.Rec.: 12: 117-118.; Shannon, M. (1981): Weldon mine Barite. Mineralogical Record 12, 118
Chlorargyrite
Formula: AgCl
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 141 (Table 4); Arizona Bureau of Mines file data.
Galena
Formula: PbS
Reference: Arthur L. Flagg Collection No. 4536
Goethite
Formula: α-Fe3+O(OH)
Reference: Rolf Luetcke
Gold
Formula: Au
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 141 (Table 4); Arizona Bureau of Mines file data.
Hematite
Formula: Fe2O3
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 141 (Table 4); Arizona Bureau of Mines file data.
Litharge
Formula: PbO
Reference: Arthur L. Flagg Collection No. 4536
Quartz
Formula: SiO2
Reference: Rolf Luetcke

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Gold'1.AA.05Au
Group 2 - Sulphides and Sulfosalts
'Galena'2.CD.10PbS
Group 3 - Halides
'Chlorargyrite'3.AA.15AgCl
Group 4 - Oxides and Hydroxides
'Goethite'4.00.α-Fe3+O(OH)
'Hematite'4.CB.05Fe2O3
'Litharge'4.AC.20PbO
'Quartz'4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anglesite'7.AD.35PbSO4
'Baryte'7.AD.35BaSO4

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Group 4 - SIMPLE OXIDES
AX
Litharge4.2.4.1PbO
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 9 - NORMAL HALIDES
AX
Chlorargyrite9.1.4.1AgCl
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Baryte28.3.1.1BaSO4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H Goethiteα-Fe3+O(OH)
OOxygen
O AnglesitePbSO4
O BaryteBaSO4
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O LithargePbO
O QuartzSiO2
SiSilicon
Si QuartzSiO2
SSulfur
S AnglesitePbSO4
S BaryteBaSO4
S GalenaPbS
ClChlorine
Cl ChlorargyriteAgCl
FeIron
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
AgSilver
Ag ChlorargyriteAgCl
BaBarium
Ba BaryteBaSO4
AuGold
Au GoldAu
PbLead
Pb AnglesitePbSO4
Pb GalenaPbS
Pb LithargePbO

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

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 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]

Tithonian - Bajocian
145 - 170.3 Ma



ID: 2809089
Jurassic sedimentary and volcanic rocks

Age: Jurassic (145 - 170.3 Ma)

Stratigraphic Name: Gardner Canyon Formation; Rudolfo Redbeds; Recreation Red Beds; Topawa Group; Harquar Formation

Description: Sandstone and conglomerate derived from volcanic rocks with associated intermediate-composition lava flows, breccias, and tuffs. In southern Arizona this unit includes rocks of the Artesa sequence, Pitoikam Formation, Mulberry Wash volcanics, Rudolfo Red Beds, Recreation Red Beds, and Gardner Canyon Formation. In western Arizona it includes the Harquar Formation, rocks of Slumgullion, and related(?) unnamed units in the Kofa and Middle Mountains. This unit is characterized by maroon, brown, and purplish-gray volcanic-lithic sandstone and siltstone, with subordinate to abundant conglomerate, quartz-rich sandstone and sparse limestone. (150-170 Ma)

Lithology: Major:{sandstone,siltstone,conglomerate}, Minor:{felsic volcanic,limestone}

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)
Copper Handbook (1907, 1908).
USGS Mineral Resources (1907).
Engineering & Mining Journal (1909): 87: 103.
Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 141 (Table 4).
Shannon, D.M. (1981). What's New in Minerals, Mineralogical Record. 12: 117-118.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 128.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10026740, MRDS ID #M000024; #10113820.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0040190442.
Arizona Bureau of Mines file data.
USGS Quijotoa, Arizona, quadrangle topo map.


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