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Aguinaldo Mine group (Black Beauty Mine), Stevens Mountain, Papago District (Sierrita District), Sierrita Mts, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 55' 8'' North , 111° 17' 10'' West
Latitude & Longitude (decimal): 31.91889,-111.28611
GeoHash:G#: 9t8vedevj
Köppen climate type:BSk : Cold semi-arid (steppe) climate


‡Ref.: Ransome, F.L. (1922) Ore deposits of the Sierrita Mountains, Pima County, Arizona, in Contributions to Economic Geology (Short Papers and Preliminary Reports), 1921 - Part I.--Metals and Nonmetals except Fuels: U.S. Geological Survey Bulletin 725J: 416-417.

Farnham, L.L., Stewart, L.A., and Delong, C.W. (1961), Manganese Deposits of Eastern Arizona, US Bureau of Mines Information Circular 7990: 119-121.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 131 (Table 4).

USGS Palo Alto Ranch Quadrangle topo map.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10039629, MRDS ID #M050526; and, Dep. ID #10137910, MAS ID #0040190088; and, Dep. ID #10186411, MAS ID #0040190460.

A former small surface and underground Pb-Ag-Mn-Cu-Au-Mo mine group located on 22 contiguous unpatented claims, in the SE ¼ sec. 26, and the NE¼ sec. 35, T.17S., R.10E., 7 miles NE of the Palo Alto Ranch and 2 miles NNW of Sunshine Camp. Owned by the Aguinaldo Mining Co. Operated by Mr. Marvin Combs (1969).

Mineralization is veins and replacement lenses of oxidized manganese and sulfides, and wulfenite, in fractured and metamorphosed Paleozoic limestone at or near a contact with granite. Alteration included oxidized Fe and Mn carrying Ag and Pb; fractured and silicified limestone. The host rock unit is the Martin Formation and the Escabrosa Limestone. The ore body is 213.36 meters long, 4.5 meters wide, strikes N-S and dips 45-80E, conformable with the limestone. 3 of the largest Mn occurrences are irregular podlike masses from 2-15 feet wide and 10-50 feet long. They are separated by 100-400 feet of barren or sparsely mineralized limestone.

Local structures include fractured, faulted NNW slivers of Paleozoics; thrust faults. Rocks from the Bisbee group, Continental Granodiorite, and the Pinal Schist are located nearby.

Samples from larger deposits averaged 10% Mn & 10% Fe. High grade ore contained 19-29% Mn & 16-21% Fe. Some ore reported assayed up to 300 oz/t Ag.

Working include adits, shafts, and open cuts to a depth of 76.2 meters. Originally worked for silver prior to 1900, with minor, sporadic, subsequent production occurred 1920-1940, 1942, and 1969. Probably not more than 100 tons of high-grade Pb-Ag ore were produced, plus some Cu and hand-picked wulfenite.

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

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

8 valid minerals.

Detailed Mineral List:

Chalcopyrite
Formula: CuFeS2
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 131 (Table 4); Ransome (1922): 416-417; Farnham, et al (1961): 119-121; Arizona Bureau of Mines file data.
Galena
Formula: PbS
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 131 (Table 4); Ransome (1922): 416-417; Farnham, et al (1961): 119-121; Arizona Bureau of Mines file data.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: MRDS database Dep. ID file #10039629, MRDS ID #M050526.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: MRDS database Dep. ID file #10039629, MRDS ID #M050526.
Molybdenite
Formula: MoS2
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 131 (Table 4); Ransome (1922): 416-417; Farnham, et al (1961): 119-121; Arizona Bureau of Mines file data.
Pyrite
Formula: FeS2
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 131 (Table 4); Ransome (1922): 416-417; Farnham, et al (1961): 119-121; Arizona Bureau of Mines file data.
Pyrolusite
Formula: Mn4+O2
Reference: MRDS database Dep. ID file #10039629, MRDS ID #M050526.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: MRDS database Dep. ID file #10039629, MRDS ID #M050526.
Wulfenite
Formula: Pb(MoO4)
Reference: Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 131 (Table 4); Ransome (1922): 416-417; Farnham, et al (1961): 119-121; Arizona Bureau of Mines file data.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
'Galena'2.CD.10PbS
'Molybdenite'2.EA.30MoS2
'Pyrite'2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
'Pyrolusite'4.DB.05Mn4+O2
Group 5 - Nitrates and Carbonates
'Malachite'5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Wulfenite'7.GA.05Pb(MoO4)
Group 9 - Silicates
'Tremolite'9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite48.1.3.1Pb(MoO4)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
H MalachiteCu2(CO3)(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
CCarbon
C MalachiteCu2(CO3)(OH)2
OOxygen
O Limonite(Fe,O,OH,H2O)
O MalachiteCu2(CO3)(OH)2
O PyrolusiteMn4+O2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O WulfenitePb(MoO4)
MgMagnesium
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
SiSilicon
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
SSulfur
S ChalcopyriteCuFeS2
S GalenaPbS
S MolybdeniteMoS2
S PyriteFeS2
CaCalcium
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
MnManganese
Mn PyrolusiteMn4+O2
FeIron
Fe ChalcopyriteCuFeS2
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
MoMolybdenum
Mo MolybdeniteMoS2
Mo WulfenitePb(MoO4)
PbLead
Pb GalenaPbS
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

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 - Toarcian
145 - 182.7 Ma



ID: 2737528
Jurassic granitic rocks

Age: Jurassic (145 - 182.7 Ma)

Description: Granite to diorite, locally foliated and locally alkalic; includes Triassic(?) granitoids in the Trigo Mountains. This unit includes two dominant assemblages of igneous rocks. The Kitt Peak-Trigo Peaks superunit includes, from oldest to youngest: dark, foliated or gneissic diorite, medium-grained equigranular to porphyritic granodiorite, and small, irregular intrusions of light-colored, fine-grained granite. The Ko Vaya superunit, limited to south-central Arizona, includes texturally heterogeneous K-feldspar-rich granitic rocks. (150-180 Ma)

Comments: 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:{diorite,alkali granite,granodiorite}

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

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